WO1991006211A1

WO1991006211A1 - Method of and device for detecting crack in eggshell

Info

Publication number: WO1991006211A1
Application number: PCT/JP1990/001065
Authority: WO
Inventors: Kunio Nambu; Jakuho Kiyota
Original assignee: Nambu Electric Co., Ltd.
Priority date: 1989-11-06
Filing date: 1990-08-22
Publication date: 1991-05-16

Abstract

An egg (8) to be examined is allowed to roll down under its own weight a plurality of planes (6) connected to each other through a plurality of steps (5) and to strike the planes (6) one by one while falling down the steps (5), whereby impact generated by the strike of the dropping egg on an impact receiving body (3) comprising the planes (6) is detected by an impact detector (12) and, from the intensity of the detected impact, a crack of the eggshell (8) is detected. The impact receiving body (3) is resiliently fixed to a base (1) through a resilient member (2).

Description

Specification

Method and apparatus for detecting cracks in egg shells

The present invention seeks a method and apparatus for detecting cracks in an egg shell. Background art

As a device for detecting cracks in an egg shell, conventionally, as disclosed in the specification of U.S. Pat. No. 3,744,299 (USP 3,744,299), By directly tapping the egg shell and converting the vibration at that time into an electric signal and comparing it with that of a normal egg, a device that detects cracks, irradiates the egg with light and reflects the reflected light There are known a device that converts the signal into an electric signal for detection, a device that captures an image of the surface of an egg, and detects the image by image processing.

A device for detecting cracks disclosed in US Pat.No. 3,744,229, applies an egg to a semicircular button connected to a piezoelectric crystal, and vibrates the piezoelectric crystal, which can be achieved at this time. Eggs and cracks are detected from the electrical signals generated.

In the disclosed device, it is difficult to detect cracks at a plurality of portions of the shell of one egg unless the egg is securely hit on the semicircular button provided discretely, and the egg jumps a little. If you do, you may not hit the button, If the button is pushed out of the sheet to ensure that the button touches the egg, there is a disadvantage that the egg cannot be transported properly, and in some cases, a new crack is formed in the egg shell. I may let you do it.

In addition, means such as image processing makes the device complicated and hard to detect fine cracks, which is not very satisfactory.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a method and a device capable of reliably detecting cracks at a plurality of locations of one egg shell. It is in .

Another object of the present invention is to provide a method and an apparatus for reliably detecting a crack in an egg shell without causing a new crack in the egg shell.

It is still another object of the present invention to provide a method and a device capable of reliably detecting a crack in an egg shell over a long period of time with a simple structure.

Another object of the present invention is to provide a method and an apparatus for easily detecting cracks all around the shell of an egg. Disclosure of the invention

According to the present invention, the egg is rolled and moved by its own weight. During the rolling movement, the eggs are dropped at a plurality of locations, and in each of the drops, the eggs collide with a given surface, and the impact generated on the surface due to the collision is sensed, and the egg shell is detected from the sensed impact. A method is provided for detecting cracks in cracks.

Further, according to the present invention, the egg is dropped at a fixed position a plurality of times while rolling the egg at the fixed position, and the egg is caused to collide with a given surface in each of the drops. A method is provided for sensing and detecting cracks in an egg shell from the sensed impact.

Further, according to the present invention, the eggs are transported while being forcibly rolled, and the eggs transported while being rolled are dropped a plurality of times during the transport so that the eggs collide with the given surface a plurality of times. Thus, there is provided a method of detecting an impact generated on the surface and detecting a crack in the egg shell from the detected impact.

In addition, according to the present invention, the egg that is rolling due to its own weight is dropped at a plurality of sites while maintaining the rolling movement of the egg, and the egg collides with a given surface a plurality of times. Means for receiving an impact, means for sensing an impact resulting from the impact of the egg on a given surface in the means for receiving the impact, and a method for detecting the impact of the egg by means of the impact sensing signal sent from the sensing means. An apparatus for detecting cracks in an egg shell, comprising: means for determining the presence or absence of cracks.

Further, according to the present invention, the eggs are transported because the eggs cannot be forcibly rolled. And means for dropping the egg transported while being rolled by the transporting means a plurality of times during the transport, causing the egg to collide with the applied surface a plurality of times, and receiving an impact due to the collision. And a means for sensing the impact caused by the impact of the egg on a given surface in the means for receiving the impact, and the presence or absence of cracks in the egg shell based on the impact sensing signal sent from the sensing means. An apparatus for detecting cracks in an egg shell, comprising: means for determining.

Still further, according to the present invention, the egg is dropped at a fixed position a plurality of times while rolling the egg at the fixed position, and in each of the drops, the egg is collided with a given surface, and a means for receiving an impact by the collision is provided. A means for sensing an impact caused by the impact of the egg on a given surface in the means for receiving the impact; and a crack in the shell of the egg based on an impact detection signal sent from the sensing means. An apparatus for detecting cracks in an egg shell, comprising: means for determining nothing.

Incidentally, the crack of the egg shell referred to in the present invention is a case of an egg in a state where the contents are contained therein. This refers to cracks in the egg shell and the collapse of a part of the egg shell that can be seen.

The above objects, features, and other objects and features of the present invention will become more apparent with preferred embodiments of the present invention described below with reference to the drawings. The present invention is limited to the following specific examples. Instead, it includes various modifications. Simple explanation of the drawing

FIG. 1 is a sectional view taken along the line II of FIG. 2 of a preferred embodiment of the present invention;

FIG. 2 is a perspective view of the specific example shown in FIG. 1,

Fig. 3 is a partially detailed electric circuit diagram of the device for determining the presence or absence of cracks in the eggshell shown in Fig. 1,

FIG. 4 is a detailed electric circuit diagram of another part of the determination device shown in FIG. 1,

FIG. 5 is a detailed electrical circuit diagram of the rest of the determination device shown in FIG. 1,

FIG. 6 is an explanatory diagram of electric signals output from the filter shown in FIG. 3, in which the horizontal axis indicates time, the vertical axis indicates voltage, and FIG. 7 is FIG. 3 to FIG. The signal diagram of the device for determining the presence or absence of cracks in the egg shell shown in

FIG. 8 shows another preferred embodiment of the present invention in FIG.

VI—section line 11

FIG. 9 is a perspective view of the specific example shown in FIG. 8,

FIG. 10 is a cross-sectional view of a preferred third embodiment of the present invention, FIG. 11 is a cross-sectional view of a modification of the embodiment shown in FIG. 10, and FIG. FIG. 13 of the preferred fourth embodiment, shown in FIG. FIG. 13 is a perspective view of the specific example shown in FIG. 12,

FIG. 14 is a sectional view of a fifth preferred embodiment of the present invention, FIG. 15 is a perspective view of a sixth preferred embodiment of the present invention, and FIG. 16 is a preferred embodiment of the present invention. It is a top view of the new 7th example. BEST MODE FOR CARRYING OUT THE INVENTION

In FIGS. 1 and 2, an elastic member 2 is provided on a base 1, and an impact body 3 is provided on the elastic member 2. The impact body 3 made of a single member is elastically fixed to the base 1 via an elastic member 2 by means of a countersunk screw 4 or the like. The degree of tightening of the impact body 3 to the base 1 by the flathead screw 4 is such that an electric signal described later can be obtained. The upper surface of the impact body 3 is formed with five planes 6 connected via a step 5. The height of the step 5 is between 1 mm and 1.5 mm in a preferred embodiment. The substantially horizontal plane 6 is formed with a sufficient area so that the egg 8 does not jump over the flat plane 6 in the direction 9 due to its own weight. Thus, the plane 6 acts as a rolling bed for the egg 8 in the movement of the egg 8 in the direction 9.

A shock sensor 12 such as a piezoelectric acceleration pickup is attached to the back surface 10 facing the plane 6 of the impact body 3, and the egg 8 thus formed keeps rolling movement due to its own weight. The egg 8 is dropped at a plurality of locations while holding the egg 8 and collided with the egg 8 a plurality of times on a given surface, and a means for receiving an impact due to the collision is a combination of the base 1, the elastic member 2, and the impact body 3. The eggs 8 are arranged, for example, between a feeding conveyor 16 for eggs 8 and a receiving conveyor 17 for eggs 8.

The electric signal obtained from the shock detector 12 is supplied to a device 21 for determining whether or not the shell of the egg 8 has cracked from the electric signal. Details of the decision device 21 are shown in FIGS. 3 to 5.

In FIG. 3, an amplifier 24 that receives an electric signal from the impact detector 12 via terminals 22 and 23 amplifies the received signal and supplies it to a low-pass filter 25. The filter 25 has, for example, a cut-off frequency of 5 kHz, and removes high-frequency noise such as a signal component based on mechanical resonance of the impact body 3 or the like from a supplied signal. . The output terminal of the filter 25 detects the first peak of the signal from the filter 25 and holds a peak level L1 of the detection circuit 26 and the signal from the filter 25. The detection circuit 27 detects the second peak following the first peak and holds the peak level L2, and the signal from the filter 25 from the first zero level to the next zero level It is connected to the time interval measuring circuit 28 that measures the time interval T of and holds the signal corresponding to the time interval T. In the detection circuit 26, the output terminal of the amplifier 29 composed of an operational amplifier in which the non-inverting input terminal is connected to the output terminal of the filter 25 is composed of the diodes 30 and 31 and the resistor 32. Connected to the input terminal of the analog switch 33 via a positive rectifier circuit. The inverting input terminal of the amplifier 29 is connected to the diode 30 and one end of the resistor 32. The output terminal of the analog switch 33 is connected to one end of each of the resistor 34 and the capacitor 35 and to the non-inverting input terminal of an amplifier 36 composed of an operational amplifier. The amplifier 36 has a resistor 37 connected between an inverting input terminal and an output terminal of the amplifier 36, and is formed as a voltage follower type. The other end of the resistor 34 is connected to one end of the analog switch 38, and the other end of the analog switch 38 and the other end of the capacitor 35 are grounded.

In the detection circuit 27, the output terminal of the amplifier 47 composed of an operational amplifier in which the non-inverting input terminal is connected to the output terminal of the filter 25 is connected to the diodes 48, 49 and the resistor 50. It is connected to the input terminal of analog switch 51 via a negative rectifier circuit. The inverting input terminal of the amplifier 47 is connected to the diode 48 and one end of the resistor 50. An output terminal of the analog switch 51 is connected to one end of each of the resistor 52 and the capacitor 53 and a non-inverting input terminal of an amplifier 54 composed of an operational amplifier. Amplifier 54 It has a resistor 55 connected between the inverting input terminal and the output terminal of the resistor 54 and is formed of a voltage follower tire. The other end of the resistor 52 is connected to one end of an analog switch 56, the other end of the analog switch 56 is connected to a positive DC power source 57, and The other end of 3 is grounded.

In the time interval measurement circuit 28, the non-inverting input terminal is connected to the output terminal of the filter 25 via the resistor 66.The inverting input terminal of the amplifier 67 composed of an operational amplifier is a voltage dividing resistor. The other end of the resistor 68 is connected to the positive DC power supply 71, and the other end of the resistor 69 is grounded. The output terminal of the amplifier 67 is connected to its own non-inverting input terminal via a resistor 70 so that the amplifier 67 has a hysteresis characteristic, while one input terminal of the AND gate 72 is provided. Connected to terminal. The output terminal of the gate 72 is connected to the control terminal of the analog switch 73. The output terminal of the analog switch 73 whose input terminal is connected to the positive DC power supply 74 is connected to the other end of the capacitor 77 whose one end is grounded via the resistor 75 via the resistor 75. They are connected to the non-inverting input terminals of the amplifiers 78, respectively. One end of the resistor 76 is connected to the other end of the analog switch 79 whose one end is grounded. The other end of the resistor 80 whose one end is grounded is connected to one end of the resistor 81 and the inversion of the amplifier 78. Each is connected to an input terminal. The other end of the resistor 81, which is a feedback resistor, is connected to the output terminal of the amplifier 78.

In the detection circuit 26, the control signal generation circuit 39 which receives signals from the output terminals of the filter 25 and the gate 72 defines a detection period of the first peak level from the received signals. A signal is generated and supplied to the control terminal of the analog switch 33.

In the detection circuit 27, the control signal generation circuit 58 that receives signals from the output terminals of the filter 25 and the gate 72 defines the detection period of the second peak level from these received signals. A signal is generated and supplied to the control terminal of the analog switch 51.

In FIG. 4, an inspection circuit for detecting whether the ratio of the level L1 of the signal obtained from the amplifier 36 to the level L2 of the signal obtained from the amplifier 54 is larger or smaller than a preset value. 9 1 is a resistor 9 2 having one end connected to the output terminal of the amplifier 54, and resistors 9 3 and 9 4 having one end connected to the output terminal of the amplifier 36 and resistors 9 2 and 9 3. Non-inverting input to the other end of the amplifier 95 with one end connected to the other end of the resistor 94 and the other end of the resistor 96 and the resistor 94 connected to the other end It consists of an amplifier 97 connected to its terminals. The output terminal of the amplifier 95 is connected to its own inverting input terminal and the amplifier 9 7 Inverting input terminal and connected to. Assuming that the respective values of the resistors 92, 93394, and 96 are R92, R93, R94, and R96, the amplifier 97 has the formula: 1 + X then 2Y-X so,

R 9 2

X =

R 9 2 + R 9 3

R 9 6

Y

If the ratio R 1 ZL 2 is greater than the value of (1 + X) / (Y-X), the logical signal 0 is converted to the ratio L If the value of 1 ZL 2 is smaller than the value of (1 + X) / (Y-X), a logical signal 1 is output.

Between the level L 1 of the signal obtained from the amplifier 36 and the level LT of the signal obtained from the amplifier 78 proportional to the time interval T. Inspect whether the ratio is larger or smaller than a preset value. In the test circuit 97a, one end of the resistor 98 whose one end is connected to the output terminal of the amplifier 36 has one end grounded. The other end of the resistor 99 and the inverting input terminal of the amplifier 100 are connected respectively. The non-inverting input terminal of the amplifier 100 is connected to the output terminal of the amplifier 78. Assuming that the respective values of the resistors 98 and 99 are R98 and R99, the amplifier 100

L 1 R 9 8 + R 9 9

If the ratio L1ZLT is greater than the value of + / R99, the logic signal 0 is applied and the ratio L1ZLT is calculated as (R9810R99). If the value is smaller than the value of ZR99, a logical signal 1 is output.

In a test circuit 101 for checking whether the level LT of the signal obtained from the amplifier 78 is larger or smaller than a preset value, a resistor 1 having one end connected to a positive DC power supply 102 is connected. The other end of 03 is connected to the other end of the resistor 104 whose one end is grounded and the inverting input terminal of the amplifier 105, respectively.The non-inverting input terminal of the amplifier 105 is The amplifier 78 is connected to the output terminal. Resistors 103, 104 and DC power supply 10 Assuming that the respective values of the power supply voltage of R 2 are R l 03, R 104 and E, the amplifier 105

R 1 0 4

L T E

Performs the operation of R103 + R104, and if level LT is greater than the value of R104Z (R103 + 104) XE, logical signal 0 is changed to level LT. Is smaller than the value of R104Z (R103 + R104) XE, the logic signal 1 is output.

In a test circuit 106 for checking whether the level L 1 of the signal obtained from the amplifier 36 is larger or smaller than a preset value, a resistor whose one end is connected to a positive DC power supply 107 is provided. The other end of 108 is connected to the other end of the resistor 109 whose one end is grounded and the inverting input terminal of the amplifier 110, respectively, and the non-inverting input terminal of the amplifier 110 is connected. Is connected to the output terminal of the amplifier 36. Assuming that the values of the power supply voltages of the resistors 108 and 109 and the DC power supply 107 are R108, R109 and E, the amplifier 110

R 1 0 9

1 1 E

R 1 0 8 + R 1 0 9 If the level L 1 is greater than the value of R 1 0 9 Z (R 1 0 8 + R 1 0 9) XE, the logic signal 0 is applied to the level L 1 and R l OSZ i R l OS + R l OQ) If the value is smaller than the value of XE, the logic signal 1 is output.

In a test circuit 1 1 1 for checking whether the level L 2 of the signal obtained from the amplifier 54 is larger or smaller than a preset value, a resistor 1 connected at one end to a negative DC power supply 1 1 2 The other end of 13 is connected to the other end of resistor 114 whose one end is grounded and the non-inverting input terminal of amplifier 115, respectively.The inverting input terminal of amplifier 115 is connected to the amplifier. 54 Connected to output terminal 4. Assuming that the respective values of the power supply voltages of the resistors 1 13, 1 14 and the DC power supply 1 12 are Rl 13, R 1 14 and E, the amplifier 1 15

R 1 1 4

2 — E

When the operation of R + R1 14 is performed and the level L2 is greater than the value of Rl14 / (R1 13 + R1 1 4) XE, the logical signal 0 is changed to the level L2 If is less than the value of R114 / (R113 + R114) XE, the logic signal 1 is output. · The circuit for selecting and sending the inspection results shown in Fig. 5 In this case, the D terminal D1 of the flip-flop circuit 122, in which five D-type flip-flop circuits are assembled, is connected to the output terminal of the amplifier 97, and The D terminal D 2 of the flip-flop circuit 122 is connected to the output terminal of the amplifier 100, and the D terminal D 3 of the flip-flop circuit 122 is connected to the amplifier 100. 5 is connected to the output terminal of the amplifier 11. The 0 terminal 04 of the flip-flop circuit 12 is connected to the output terminal of the amplifier 11 and the flip-flop circuit 12 2 The D terminal D5 of the flip-flop circuit 122 is connected to the output terminal of the amplifier 115, and the clock terminal C of the flip-flop circuit 122 is connected to the control signal generation circuit 58 of the detection circuit 27. Connected to output terminal. The Q output terminals Q1 to Q5 of the flip-flop circuit 122 are connected to one input terminal of the exclusive OR gates 123 to 127, respectively. Exclusive orgate

The other input terminals of 123 to 127 are respectively connected to one terminal of switches 130 to 134 connected to the positive DC power supply 129 via the resistor 128. Switch 130

The other terminal of 134 is grounded. The output terminals of the exclusive OR gates 123 to 127 are connected to one end of the light emitting diodes 140 to 144 for confirming the individual test results and the OR gate 1 via switches 13 to 13. The other ends of the light emitting diodes 140 to 144 are connected to the other end of a resistor array 144 whose one end is grounded. Have been. The output terminal of OR gate 145 is connected to one end of the light emitting diode 147 for confirming the comprehensive inspection result and the output terminal 148 of the decision device 21. The other end of the current limiting resistor 149 having one end grounded is connected to one end. The output terminal 148 is connected to a known cracked egg ejection mechanism (not shown), and the cracked egg ejection mechanism is based on a determination result signal obtained at the output terminal 148. Then, the cracked eggs 8 arriving at the receiving conveyor 17 are discharged.

In the control signal generation circuit 150 of the decision device 21 shown in FIG. 5, the egg 8 passes through the delivery conveyor 16 and the first to fourth planes 6 while rolling by its own weight. One of the terminals 15 1 and 15 2, which receives a signal from a detector (not shown) that detects this, is a resistor 15 3 and a capacitor 1 which form a differentiating circuit. The other end of the resistor 15 3 is connected to the positive DC power supply 15 5, and the other end of the capacitor 15 4 is connected to one end of the positive DC power supply 15 5. The other end of the resistor 157 connected to 6 and the input terminal of the inverter 158 forming a Schmitt trigger circuit having hysteresis characteristics. The output terminal of the inverter 158 is connected to the clock terminal C of each of the D tire flip-flop circuits 159 and 160, and the flip-flop circuits 159 and 1 60 D terminal is positive Connected to power supply 1 6 1 and clamped to logic 1. The Q terminal of the flip-flop circuit 1559 is connected to the control terminals of the detectors 26 and 27 and the analog D-switches 38, 56 and 79 of the time interval measurement circuit 28. The Q terminal of the flicker flop circuit 160 is connected to the other input terminal of the AND gate 72 of the time interval measuring circuit 28. The reset terminal R of the flip-flop circuit 160 is connected to the output terminal of the control signal generation circuit 58 of the detection circuit 27.The input terminal is connected to the output terminal of the AND gate 72. The output terminal of the connected inverter 163 is connected to the reset terminal R of the flip-flop circuit 159.

The operation of the apparatus 200 for detecting cracks in the egg shell constructed as shown in FIGS. 1 to 5 will now be described with reference to FIGS. 6 and 7. .

When the egg 8 falls on one plane 6, if the egg has no crack in the shell, a voltage signal as shown by an acceleration waveform 201 is obtained at the output terminal of the filter 25, while In the case of a cracked egg, it was found that a voltage signal as shown by the acceleration waveform 202 was obtained. In other words, when the unbroken egg 8 is dropped on one plane 6, the flat screw is set so that a voltage signal as shown by the waveform 201 is obtained at the output terminal of the filter 25. When the elastic member 2 is compressed by appropriately tightening 4, in the case of a cracked egg 8, a voltage signal as shown by a waveform 202 is filtered. 1δ

It is obtained from 25 output terminals.

From the signals 201 and 202, if the ratios L 1 ZL 2 and L 1 ZT and the level L 1 and the time interval Τ are large and the level L 2 is small in absolute value, a normal egg, that is, a crack If the ratio L 1 ZL 2 and L 1 ZT and the level L 1 and the time interval Τ are small and the level L 2 is large in absolute value, the egg is abnormal, that is, a cracked egg. It turns out that it is.

First, before the detection operation, switches 130-134 and 1

Turn on all of 35 to 1 39.

Next, at time t0, when the eggs 8 sent out by the feed-out conveyor 16 pass through the conveyor 16 while rolling under their own weight, a pulse signal from a detector (not shown) for detecting this is given. 21 0 is the terminal 15 1, Canon. It is supplied to the clock terminal C of the flip-flop circuits 159 and 160 via the inverter 154 and the inverter 158. As a result, the Q terminal of the flip-flop circuit 159 generates a signal 2 11 of logic 1 and the Q terminal of the flip-flop circuit 16 0 outputs the signal 2 1 of logic 1 Signal 2 11, the analog switches 3 8 5 6 and 7 9 are turned on by the signal 2 1 1, and the charges on the capacitors 3 5 5 6 and 7 7 turn on resistors 34, 52 and 7 6 While one of the input terminals of gate 72 is set to a logic one by signal 211. The other input terminal of get 72 is At this point, since the output is at logic 0, the output terminal of the gate 72 outputs a signal of logic 0, and thus the analog switch 73 is in the off state. While not supplied to one terminal of the capacitor 77 through 75, the control signal generation circuits 39 and 58 output a logical 0 signal, and as a result, the analog switches 33 and 51 It is set to off.

When the egg 8 rolling in its own weight and moving in the direction 9 falls on the -th flat surface 6, the impact body 3 receives the impact of the fall of the egg 8, and the impact sensors 12 And generates an electrical signal. This electric signal is supplied to the amplifiers 29 and 47 as the signal 201 or 202 via the amplifier 24 and the filter 25, and is also supplied to the amplifier via the resistor 66. 67, and further to control signal generation circuits 39 and 58. At time t1, when the signal 201 or 202 becomes more than the minute voltage defined by the resistors 68 and 69, the output terminal of the amplifier 67 becomes logic 1 and the gate is thereby turned on. The output terminal of 72 also generates the signal 2 13 of logic 1, and as a result, the analog switch 73 is set to the on state, while the flip-flop circuit 159 is reset. . The reset of the flip-flop circuit 159 causes the signal 2 11 of logic 1 to disappear, and the analog σ switches 38, 56, and 79 to be turned off.

A logic 1 signal 2 1 3 is generated from the output terminal of gate 7 2. Then, the control signal generating circuit 39 receiving this outputs a signal 2 14 of logic 1 to the output terminal, whereby the analog switch 33 is set to the ON state, and the capacitor 35 Is charged with the voltage of the positive portion of the signal 201 or 202 supplied through the amplifier 29 and the diode 31, and this voltage is sequentially output from the amplifier 36. After receiving the signal 21, the control signal generator 39 observes the signal 201 or 202, detects the arrival of the first peak level in the signal 201 or 202, and detects the time t. When the first peak level is detected in 2, the transmission of the logic 1 signal 2 14 is stopped. With the disappearance of the signal 2 14, the analog switch 33 is turned off, and as a result, canon. The shifter 35 holds the voltage of the peak level L 1 of the signal 201 or 202.

After receiving the signal 2 13, the control signal generation circuit 58 observes the signal 201 or 202, detects the arrival of the first peak level in the signal 201 or 202, and detects the time t 2 When this first peak level is detected, a signal 2 15 of logic 1 is transmitted. As a result, the analog switch 51 receiving the signal 2 15 of the logic 1 is turned on, and the analog switch 56 is set to the off state after the time t1, so that the capacitor 53 is connected to the amplifier 53. It is charged with the voltage of the negative part of the signal 201 or 202 supplied via the diode 47 and the diode 49, and this voltage is output in turn via the amplifier 54. Control signal generation After sending out the signal 2 15, the circuit 58 observes the signal 201 or 202 further, and detects the next peak level in the signal 201 or 202 (the signal 201 or 200 2 shown in the figure). In this case, the arrival of the first negative peak level) is detected, and when this peak level is detected at time t4, the transmission of the logic 1 signal 215 is stopped. With the disappearance of the signal 215, the analog switch 51 is turned off, so that the channel 53 holds the voltage of the second peak level L2 of the signal 201 or 202.

When the analog switch 73 is turned on and the analog switch 79 is turned off at time t 1, the capacitor 777 is turned on by the voltage of the DC power supply 74 to output the signal 201 or 20. 2 is charged again up to the voltage specified by the resistors 68 and 69, that is, until the amplifier 67 outputs a signal of logic 0 and the signal 2 13 disappears at time t3. Therefore, the period during which the signal 2 13 occurs corresponds to the time interval T, and the capacitor 77 charges the voltage of the DC power supply 74 for the time interval T, and as a result, is sent to the output terminal of the amplifier 78. The voltage level has a value LT proportional to the time interval. The flip-flop circuit '12 2 to which the signal 215 is supplied is connected to the amplifier 97, which is supplied to the D terminals D 1 to D 5 at the time t 4 when the signal 215 disappears, The operation result signals from 100, 105, 110, and 115 are stored and output to the Q1 to Q5 terminals, respectively. Similarly, the flip-flop circuit 160 to which the signal 2 15 is supplied is connected to the signal 2 1 The signal is reset at the time point t4 when the disappearance of 5, and the transmission of the signal 2 12 from the Q terminal is stopped. When the signal 2 12 disappears, one input terminal of the gate 72 becomes logic 0. The signals generated at the Q terminals Q1 to Q5 of the flip-flop D-pump circuit 122 are fed to the egg discharge mechanism (not shown) via the exclusive OR gates 123 to 127 and the OR gate 144. Therefore, when at least one signal of logic 1 is received at time t4 at the D terminal of the flip-flop circuit 122, it is treated as a cracked egg by the egg ejector ellipse. I do.

Next, when the egg 8 rolls over the first plane 6 and falls on the second plane 6, the signal 210 is again supplied to the terminal 151, and The same operation is repeated, and this operation is performed until the egg 8 passes through the fifth plane 6 while rolling under its own weight. The egg ejection mechanism observes the output signal of OR gate 144 until the operation up to the fifth for one egg 8 is completed, and outputs at least one logical 1 signal to OR gate 14 5 , The shell of the egg 8 is discharged as having cracks. The occurrence of logic 1 can be visually observed with diodes 140 to 144 and 1407.

Next, when a new egg 8 is sent out and supplied from the conveyor 16 to the first plane 6, the same operation as described above is repeated. Shock hand with body 3 Although a step was formed, the present invention is not limited to this. For example, as shown in FIGS. 8 and 9, five individual substantially rectangular parallelepiped bodies 301 were prepared, and 0 1 is attached to the base 300 having a step 302 via a separate elastic member 310, and each plane 300 of each impact body 301 is connected to the base 300 via a step 330. The impact means may be formed so that the impact bodies 301 are individually subjected to impact by arranging them in this case. In this case, each of the impact sensors 309 is connected to each of the impact bodies 3 opposed to the flat surface 306. The electric signal of the impact detector 309 is supplied to the amplifier 24 of the determination device 21. In this case, each electric signal from the shock detector 309 may be supplied to the amplifier 24 via the buffer amplifier 310.

Also, the plane 6 or 30 6 does not need to be arranged horizontally, and may be arranged so as to descend in the moving direction 9 of the egg 8. As a result, the rolling movement is ensured.

In addition, in the above specific example, the egg 8 was dropped at a plurality of different sites while maintaining the rolling movement of the egg 8, but the present invention is not limited to this.For example, as shown in FIG. A polygon 3 2 2 having a plane 3 2 1 connected via a step 3 2 0 is prepared, and a shock sensor 3 is provided in the center hole 3 2 3 of the polygon 3 2 2 facing the plane 3 2 1. 2 4 All the polygons 3 2 2 are attached to the rotating shaft 3 2 6 via the elastic members 3 2 5 to form an impinging means, and the polygon 3 2 2 is rotated by the rotation 3 2 7 in the direction of the rotating shaft 3 2 6. 2 may be rotated in the direction 3 2 7, and this rotation may cause the egg 8 to rotate at a fixed position and fall on the step 3 20 to collide with the plane 3 2 1. In this case, during the inspection of one egg 8, the movement preventing members 328 and 329 are arranged on both sides of the polygonal body 322 so that the egg 8 does not move.

In the specific example shown in FIG. 10, a plurality of impact sensors 3 24 are mounted on the impact body 32 2, but instead of this, as shown in FIG. The impact sensor 3 3 1 may be attached to the 3 3 6 bearing 3 3 0, and the bearing 3 3 0 may be attached to the base 3 3 3 via the elastic member 3 3 2 .In this case, the rotating shaft 3 26 and the impacting body 322 can be directly connected to each other through the center hole 3233 of the impacting body 322 without passing through the elastic member 325.

Further, in the specific example, the energy of the falling of the egg 8 is used to move the egg 8, but as shown in FIGS. 12 and 13, the endless chain 3 40 The egg 8 is forcibly moved while being rolled in the direction 9 by a conveying device 342 comprising a pair of rollers 341, which are attached to the endless chain 3410 so as to be parallel to each other. In this case, each impact body 345 supported by the base 3443 via the elastic member 3444 is tilted and disposed at almost the same position, Up The plane 346 may be set so as to become a slope, and a step 347 may be formed by this. The eggs 8 are conveyed while being arranged between a pair of rollers 34 1 and another pair of α-rollers 34 1, and the upstream delivery tray 34 8 and the downstream receiving tray 3 4 Each of 4 9 is formed of a pair of long members, and spaces 350 and 35 1 are formed between the pair of long members so that the eggs 8 can be easily transported while rolling with their long diameters lying sideways. I do.

In the specific examples shown in FIGS. 12 and 13, the eggs 8 are moved while rolling by a pair of rotatable rollers 341 to pass through each step 347. Each of the 3 4 1 groups does not necessarily need to be rotatable, but may be a simple round bar. In addition, as shown in FIG. 14, a pair of push plates 3 5 5 is attached to an endless chain 3 40. May be attached so as to be parallel to each other to form a transfer device for the eggs 8, and the eggs 8 arranged between the pair of push plates 35 5 and the other pair of push plates 35 5 The sheet is conveyed along the direction 9 while being pushed by the push plate 355, and falls at the step 347 to generate an impact on the impact body 345.

Further, in the above-described specific example, each of the colliding eggs 8 arranged via the step is formed by a continuous one plane. However, as shown in FIG. 15, as shown in FIG. Each face to be arranged

—As a pair of curved surfaces 36 2, a pair of curved surfaces 36 2 may be formed by a pair of semi-cylindrical members 36 3 and 36 4 arranged in parallel. In this case, the semi-cylindrical members 36 3 and 36 4 are alternately supported on the base 36 6 via the elastic members 365, and the other semi-cylindrical members 36 3 and 3 6 4 is directly supported on the base 36 6, and the striking detector is mounted only on the semi-cylindrical members 36 3 and 36 4 supported on the base 36 6 via the elastic member 36 5. Only the electric signals from these shock sensors may be used.

Also, as shown in Fig. 16, a plurality of rows, in this example, three rows of egg movement guide members 371, 372, and 373 are provided along the movement direction 9 of the eggs 8. A plurality of steps 3777 are formed in the guide member 371, in the region 3774, in the guide member 372 in the region 3775, and in the guide member 3773 in the region 3776. When the egg 8 moves while rolling in the area 3 7 4, the vicinity of the sharp end 3 7 8 of the egg 8 falls through the step 3 77 of the guide member 37 1, and the egg 8 moves in the area 3 7 5 When moving while rolling, the central portion 379 of the egg 8 falls through the step 377 of the guide member 372, and when moving while rolling the egg 8 in the area 3776, the egg 8 So that the vicinity of the blunt end 380 of the egg 8 falls through the step 377 of the guide member 377, the vicinity of the sharp end 378 of the egg 8, the central portion 379, and the blunt end 380 Cracks around each part such as the vicinity, and preferably around the whole Further but it may also be in earthenware pots by individually detecting, in a means for sensing an impact, is limited to the examples of the Instead, for example, various sensors such as an eddy current displacement pickup and an electrokinetic velocity pickup can be used.

In addition, although the second peak level L2 was used in determining the presence or absence of cracks, the present invention is not limited to this, and the level L2 is defined as the difference between the first peak and the second peak. The difference, that is, the level L3 from peak to peak shown in FIG. 6 may be used.

On the other hand, in the specific example, the presence or absence of cracks in the shell of egg 8 was determined by all of 1 ZL 2, L 1 ZLT, values L, L 1, and L 2, but switches 13 0 to 13 4 And the on / off state of 135 to 13 9 as appropriate, and set the ratios L 1 ZL 2, L 1 ZLT, values LT, L 1 and L 2 to the required number of cracks in the shell of egg 8 May be determined, for example, only by comparing the ratio L 1 ZL 2 with a preset value or only by comparing the ratio L 1 / L 3 with a preset value. You may decide to determine if the shell of egg 8 is cracked.

As described above, according to the present invention, since the surface on which the egg collides is provided following the step where the egg falls, a signal that fights for the presence or absence of cracks in the egg shell can be corrected multiple times. It can be obtained reliably, and the presence or absence of cracks in the eggshell can be reliably detected.

In addition, simply because multiple impact surfaces are arranged Thus, the reliability of the eggshell can be extremely high, and the presence or absence of cracks in the eggshell can be detected with high reliability over a long period of time.

Claims

Range of request

1-The egg rolls under its own weight, causing the egg to fall at multiple locations during this rolling movement, causing the egg to collide with a given surface in each of the falls, resulting in this collision on the surface A method that senses impact and detects cracks in the eggshell from this sensed impact. .

2-The egg is dropped at a certain position several times while rolling the egg at a certain position.Each fall causes the egg to collide with a given surface, and the impact generated by the collision on the surface is sensed. How to detect cracks in egg shells from impact.

3. The egg is transported while being rolled forcibly, and the egg transported while being rolled is dropped a plurality of times during the transport to collide the egg multiple times on a given surface. A method of detecting the impact generated on the surface and detecting cracks in the egg shell from the detected impact.

4. While keeping the rolling movement of the egg being rolled by its own weight, drop the egg at a plurality of portions to collide the egg with a given surface a plurality of times, and a means for receiving an impact by the collision, Means for sensing the impact caused by the impact of the egg on a given surface in the means for receiving the impact, and means for determining the presence or absence of cracks in the egg shell based on the impact sensing signal sent from the sensing means An apparatus for detecting cracks in an egg shell, comprising: a step;

5. The means for receiving the impact includes: a base; an impact body made of a single member having a plurality of surfaces connected via steps to drop the egg at a plurality of sites to collide the egg a plurality of times; In order to elastically hold the impact body with respect to the base, an elastic member is provided between the base and the impact body, and the means for sensing the impact is provided on the impact body. The device for detecting cracks in an egg shell according to claim 4, which is attached.

6. The means for receiving an impact includes a base, a plurality of impact bodies each having a given surface, and a plurality of impact bodies independently elastically held against the base. And a resilient member provided between the base and each impacting body, wherein the given surface is configured to drop the egg at a plurality of positions to collide the egg multiple times, 5. The device for detecting cracks in an egg shell according to claim 4, wherein the device is arranged with a step and the means for detecting an impact comprises an impact sensor attached to each impacting body.

7-The device for detecting cracks in an egg shell according to any one of claims 4 to 6, wherein the given surface is provided horizontally in a direction of movement of the egg.

8. The device for detecting cracks in an egg shell according to any one of claims 4 to 6, wherein the given surface is provided so as to be inclined in a moving direction of the egg. 9-The means for determining comprises: means for removing unwanted high-frequency signals from the sensed signal; the first peak level in the signal from which unwanted high-frequency signals have been removed from the sensed signal; Means for comparing the ratio of the level associated with the peak level of the egg with a preset value, and determining the presence or absence of cracks in the egg shell based on the result of the ft comparison. An apparatus for detecting cracks in an egg shell according to any one of claims 4 to 6, wherein the crack is detected.

10. Means for forcibly transporting the egg while rolling it, and dropping the egg conveyed while being rolled by the transporting means a plurality of times during the transportation so that the egg can be transported multiple times on the given surface. Means for colliding and receiving an impact from the collision, means for sensing the impact caused by the impact of the egg on a given surface in the means for receiving the impact, and impact transmitted from the sensing means Means for determining the presence or absence of cracks in the eggshell based on the sensing signal. A device for detecting cracks in the eggshell.

11 1. The means for receiving the impact is a base and an impact body made of a single member having a plurality of surfaces connected via steps to drop the eggs at a plurality of different portions and collide the eggs multiple times. 10. The egg shell of claim 10, further comprising: an elastic member provided between the base and the impact body to elastically hold the impact body with respect to the base. Equipment to do.

1 2. The means for receiving an impact includes a base, a plurality of impact bodies each having a given surface, and a base for independently and elastically holding each of the plurality of impact bodies with respect to the base. An elastic member is provided between the table and each impacting body, and the given surface has a step to drop the egg at a plurality of portions and collide the egg multiple times. 10. The device for detecting cracks in an egg shell according to claim 10, which is arranged in a row.

1 3. The means for forcibly rolling and transporting the eggs has a plurality of rollers arranged in parallel with each other, and is configured to transport the eggs by arranging the eggs between these rollers. Claim 10 A device that detects cracks in the eggshell.

1 4. The means for forcibly rolling and transporting the eggs has a plurality of push plates arranged in parallel with each other, and arranges the eggs between the push plates so that the eggs are transported. A device for detecting cracks in the eggshell of claim 10 which is constituted.

15. The device for detecting cracks in an egg shell according to any one of claims 10 to 14, wherein the given surface is provided horizontally in a direction of movement of the egg.

16. The device for detecting cracks in an egg shell according to any one of claims 10 to 14, wherein the given surface is provided so as to be inclined in a direction of movement of the egg.

17. Means to determine are unnecessary high frequencies among the sensed signals. Means for removing the wave signal, and a ratio between the first peak level and the level related to the next peak level following the signal in which the unnecessary high-frequency signal has been removed from the means for removing the wave signal, and a preset value. The apparatus for detecting cracks in an egg shell according to any one of claims 10 to 14, further comprising means for comparing the egg shells, wherein the apparatus is configured to determine the presence or absence of a crack in the egg based on a comparison result of the means for comparing. .

18. Rolling the egg at a certain position several times while rolling the egg at a certain position, causing the egg to collide with a given surface in each of the drops, and a means for receiving an impact by the collision; Means for sensing the impact caused by the impact of the egg on a given surface in the receiving means, and means for determining the presence or absence of cracks in the egg shell based on the impact sensing signal sent from the sensing means A device that detects cracks in egg shells.

19. The means for receiving an impact includes a polygon having a plurality of surfaces, each surface being connected via a step, a rotation axis inserted into a center hole of the polygon, and an elastic body. And an elastic body provided between the rotation axis and the polygonal body in the center hole of the polygonal body to support the polygonal body. The means for sensing is provided in the polygonal body. Item 18 A device for detecting cracks in egg shells.

20. The means for receiving an impact has a base and a plurality of surfaces. A polygon whose surfaces are connected via a step, a rotating shaft inserted into a central hole of the polygon, a bearing rotatably supporting the rotating shaft, and a bearing for elastically supporting the bearing. 19. The device for detecting cracks in an egg shell according to claim 18, comprising: an elastic body provided between the bearing and the base; and the means for sensing is provided on the bearing.