JP2011064572A - Coagulation inspection method and device for package content - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coagulation inspection device for package contents for coagulation inspection of contents, having fluidity enclosed inside a package, capable of performing the nondestructive inspection rapidly, simply, and at low cost. <P>SOLUTION: The device includes a shake table 2 for forced-vibrating a package 1, which includes contents C with fluidity, on the table in the reciprocating horizontal direction; a load sensor 3 for measuring load changes due to the shaking contents C, and converting it into an electrical signal; and a coagulation determination means 10 for storing accumulation data of a predetermined waveform accumulating the electrical signal of the load sensor, and determining the coagulation state of the contents C, based on the accumulation data of the predetermined waveform. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for inspecting the coagulation of a packaging container content for inspecting the coagulation of the fluid content enclosed in the packaging container.

As a method for inspecting whether fluid contents such as liquid or paste-like chemicals or food enclosed in a packaging container are coagulated due to the influence of various bacteria, a method for inspecting by irradiating with X-rays is known. (For example, Patent Documents 1 and 2).
In addition, as a method for inspecting whether other fluid contents are solidified, a method of measuring vibration propagation in other parts by applying vibrations to a part of the container, etc. (for example, patents) Document 3), a method of placing a container on a table that is rotatably fixed by a torsion spring, and measuring the attenuation of free rotation vibration of the fluid content enclosed in the container (for example, Patent Document 4) is known. ing.

Japanese Patent No. 2931838 JP 2001-242100 A JP-A-10-33114 JP-A-2-236141

By the way, since the methods of Patent Documents 1 and 2 described above use X-rays, there is an advantage that even if the container is opaque, it can be inspected nondestructively, but it is necessary to protect against exposure to the human body and is a simple method It's hard to say. In addition, an X-ray tube for irradiating X-rays and an X-ray CCD for detecting X-rays are expensive and difficult to say as an inexpensive method.
Further, the method of Patent Document 3 is greatly affected by the material of the packaging container when measuring the vibration wave, and the vibration wave propagated through the surface of the packaging container is also measured at the same time. The ratio of the signal to be reduced is smaller than the noise signal, and the S / N ratio may be reduced.

Furthermore, the method of Patent Document 4 requires the use of a spring having a small spring constant because the frictional force between the flowable contents and the inner surface of the rotating container is very small, and it takes a relatively long time to measure the damping. .
Therefore, the present invention has been made paying attention to the unsolved problems of the above-described conventional example, and non-destructive, quick, simple and inexpensive inspection of the solidification of the fluid content sealed in the packaging container. The present invention relates to a solidification inspection method and apparatus for packaging container contents that can be performed.

In order to achieve the above object, the solidification inspection method for a packaging container content according to claim 1 is characterized in that a packaging container filled with a fluid content is placed on a vibration table, and the vibration table is driven to drive the solidification inspection method. Applying forced vibration by reciprocating vibration in the left-right direction to the packaging container, when the swing of the contents reaches a steady state, the forced vibration is stopped and the swing of the contents is damped. The load change due to the swinging of the signal is converted into an electric signal by the load sensor, and the solidification state of the contents is inspected based on the accumulated data of a predetermined waveform obtained by accumulating the electric signal.
According to this invention, it becomes a nondestructive inspection method for measuring the load change at the time of vibration of the contents enclosed in the packaging container, and only a short time load change from forced vibration to damped vibration is measured. Inspection method. In addition, since no radiation such as X-rays harmful to the human body is used as a measuring means, there is no need for legal regulations and protection against exposure.

According to a second aspect of the present invention, in the method for inspecting the solidification of the packaging container contents according to the first aspect, the load sensor is embedded in a part of the mounting surface of the vibration table, The packaging container was placed so as to straddle another part of the placement surface and part of the load sensor.
According to the present invention, it is possible to reliably transmit the forced vibration and the damped vibration of the reciprocating motion in the left-right direction to the enclosed contents without overturning the packaging container.

Moreover, the invention of claim 3 is the coagulation inspection method for the contents of the packaging container according to claim 1 or 2, wherein the frequency of the forced vibration by the shaking table is the same as the natural frequency of the contents, or The same frequency in the vicinity, or the same frequency as the odd number of the natural frequency or a frequency in the vicinity.
According to the present invention, the amplitude of the content is increased, and as a result, the amplitude of the accumulated data is also increased, and the content coagulation determination is facilitated.

According to a fourth aspect of the present invention, there is provided the solidification inspection method for packaging container contents according to any one of the first to third aspects, wherein the vibration table is based on the accumulated data of the predetermined waveform. When the amplitude when adding is less than or equal to a preset threshold, it is determined that the content is solidified.
According to the present invention, based on the accumulated data of a predetermined waveform, it is determined that the content is solidified when the steady-state amplitude when the shaking table is applying forced vibration is equal to or less than a preset threshold value. Thus, it is possible to determine with high accuracy whether or not the contents are solidified during forced vibration.

Further, the invention according to claim 5 is the method of coagulation inspection of the packaging container contents according to any one of claims 1 to 4, wherein the forced vibration of the shaking table is based on the accumulated data of the predetermined waveform. The damping constant when the contents are oscillating damped is calculated, and when the damping constant is equal to or greater than a preset threshold, it is determined that the contents are solidified.
According to this invention, based on the accumulated data of a predetermined waveform, the damping constant when the forced vibration of the shaking table is stopped and the contents are damped is calculated, and this damping constant is greater than or equal to a preset threshold value. Sometimes, it is determined that the content is solidified, so that it is possible to determine with high accuracy whether the content is solidified during the damped vibration.

According to a sixth aspect of the present invention, in the method for inspecting a solidification of the contents of the packaging container according to any one of the first to fifth aspects, the excitation table is based on the accumulated data of the predetermined waveform. Is the ratio of the amplitude when the vibration is applied and the amplitude after a certain time has passed since the forced vibration of the shaking table was stopped (= [amplitude when applying the forced vibration] / [forced vibration The amplitude after a certain period of time has elapsed since the stoppage] is determined, and when the ratio is equal to or greater than a preset threshold value, it is determined that the content is solidified.
According to the present invention, the determination method is effective when the contents are strongly attenuated and a large number of peak points during attenuation cannot be obtained.

On the other hand, the coagulation inspection apparatus for a packaging container content according to claim 7 is provided with an excitation table capable of applying a forced vibration by a reciprocating vibration in the left-right direction on a packaging container in which a fluid content is enclosed. , A load sensor for measuring a load change caused by swinging of the contents and converting it into an electrical signal, accumulated data of a predetermined waveform for accumulating the electrical signal of the load sensor, and the content based on the accumulated data of the predetermined waveform Solidification determining means for determining the solidification state of the object.
According to the present invention, since a device such as a vibration table and a load sensor that are generally widely used is configured, the device is inexpensive.

The invention according to claim 8 is the coagulation inspection apparatus for the contents of the packaging container according to claim 7, wherein the frequency of the forced vibration of the shaking table is the same as or close to the natural frequency of the contents. The frequency or a frequency that is the same as or near the odd number of the natural frequency.
According to the present invention, the amplitude of the contents increases, and as a result, the amplitude of the accumulated data also increases, so that the content coagulation determination is easy.

Further, the invention according to claim 9 is the coagulation inspection apparatus for the contents of the packaging container according to claim 7 or 8, wherein the coagulation determining means is configured such that the excitation table is based on the accumulated data of the predetermined waveform. A first determination routine is provided for determining that the contents are solidified when the amplitude when the vibration is applied is equal to or less than a preset threshold value.
The invention according to claim 10 is the packaging container content coagulation inspection apparatus according to any one of claims 7 to 9, wherein the coagulation determining means is configured to perform the addition based on the accumulated data of the predetermined waveform. When the forced vibration by the shaking table is stopped and the content is damped, the damping constant is calculated. When the damping constant is equal to or greater than a preset threshold, it is determined that the content is solidified. A second determination routine is provided.

Further, the invention according to claim 11 is the packaging container content coagulation inspection apparatus according to any one of claims 7 to 10, wherein the coagulation determining means is configured to perform the addition based on the accumulated data of the predetermined waveform. A ratio of the amplitude when the shaking table applies the forced vibration and the amplitude after the shaking table stops the forced vibration and a certain time has elapsed (= [the amplitude when the forced vibration is applied) ] / [Amplitude after a certain time has passed since the forced vibration was stopped]) and a third determination routine for determining that the content is solidified when this ratio is equal to or greater than a preset threshold value. It has.
According to the inventions of these ninth to eleventh aspects, it is determined whether or not the content enclosed in the packaging container is solidified at least one of the forced vibration and the damped vibration. Can be performed with high accuracy.

According to the solidification inspection method for the contents of the packaging container according to the present invention, it can be a nondestructive inspection method for measuring the load change during vibration of the contents enclosed in the packaging container, and is attenuated from the forced vibration. Since it only measures the load change in a short time until vibration, it can be a rapid inspection method. Further, since radiation such as X-rays that are harmful to the human body is not used as a measuring means, it is possible to provide a simple inspection method without the need for legal regulations or protection against exposure.
Moreover, since the coagulation inspection apparatus for packaging container contents according to the present invention is configured by combining a vibration table, a load sensor, and the like that are generally widely used, an inexpensive apparatus can be provided.

It is a schematic block diagram which shows the coagulation | solidification inspection apparatus of the packaging container content which concerns on this invention. It is a block diagram of PC (personal computer) which comprises the coagulation inspection apparatus. It is a flowchart explaining the operation | movement of the sampling data acquisition which a coagulation inspection apparatus performs. It is a flowchart explaining selection operation | movement of the 1st-3rd coagulation determination which a coagulation inspection apparatus performs. It is a flowchart explaining the 1st coagulation determination operation | movement which a coagulation inspection apparatus performs. It is a flowchart explaining the 2nd coagulation determination operation which a coagulation inspection apparatus performs. It is a flowchart explaining the 3rd coagulation determination operation which a coagulation inspection apparatus performs. It is a graph which shows the measurement waveform as accumulation | storage data of the load change by the rocking | fluctuation of the content which the load sensor of the coagulation inspection apparatus measured.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
FIG. 1 shows a packaging container content coagulation inspection apparatus according to the present invention, a vibration table 2 on which a packaging container 1 is placed, a load sensor 3 embedded in a part of the upper surface of the vibration table 2, A personal computer (PC) 10 that acquires data from the load sensor 3 and performs a coagulation test on the contents of the packaging container is provided.

The packaging container 1 is filled with a fluid content C such as a liquid or pasty medicine or food.
The vibration table 2 is a device that carries the forcible vibration of the reciprocating vibration in the left-right direction of the arrow A, specifically, the horizontal direction by placing the packaging container 1. Vibrates at the vibration frequency.
The drive unit 4 drives the vibration table 2 for a predetermined time (3 seconds), stops the forced vibration after a predetermined time after the vibration table 2 is forced to vibrate, and drives the vibration table 2 at the start of driving. Son, a stop signal Soff is output to the PC 10 when driving of the vibration table 2 is stopped.

A recess 5 is formed in a part of the mounting surface 2a of the vibration table 2, and the load sensor 3 is placed in the recess 5 so that the mounting surface 2a and the upper surface of the vibration table 2 are on the same surface. Buried. In this embodiment, a load sensor 3 composed of a compression type load cell with a rated load of 10 N is employed, and this load sensor 3 outputs a voltage signal Sa of 0 to 1 mV proportional to the measured load to the PC 10 at 100 Hz.
As shown in FIG. 2, the PC 10 includes a reset circuit 11, a power supply circuit 12, an input port 13, a main control unit 14, an output port 18, a display unit (display) 19, and a keyboard 20.

The reset circuit 11 sets the main control unit 14 to an initial state. The input port 13 takes in the drive signal Son and stop signal Soff from the drive unit 4, and takes in the voltage signal Sa described above as an analog voltage signal proportional to the measured load from the load sensor 3 and transfers it to the main control unit 14.
The main control unit 14 is a CPU (processing device), and includes a ROM (read only memory) 15, a RAM (random access memory) 16, and an A / D conversion unit 17. These ROM (read only memory) 15, RAM (random access memory) 16, and A / D (analog / digital) converter 17 are provided. The CPU may include a ROM 15, a RAM 16, and an A / D conversion unit 17, or a ROM 15, a RAM 16, and an A / D conversion unit 17 externally connected by a bus.

The A / D converter 17 converts the voltage signal (analog voltage signal) Sa input from the load sensor 3 as a voltage signal (digital voltage signal) Sd.
The ROM 15 stores a sampling data acquisition program, a coagulation determination program, and the like which will be described later.
The RAM 16 is provided with an area for accumulating the digital voltage signal Sd obtained by calculation with the A / D conversion program as electrical signal data (accumulated data) having a predetermined waveform at predetermined time intervals, and determining coagulation. The threshold value used in the routine is stored.
The output port 18 transfers the information signal output from the main control unit 14 to the display unit 19.

Next, the control program stored in the ROM 15 will be described with reference to FIGS.
FIG. 3 shows a flowchart of the sampling data acquisition program, and this program is executed by timer interruption every predetermined time.
First, in step ST1, it is determined whether or not a stop signal Soff is input. If the stop signal Soff is input in step ST1, the process proceeds to step ST2, and if the stop signal Soff is not input, the process proceeds to step ST3. In step ST3, the stop timer Ts is cleared to zero.

Next, the process proceeds to step ST4, and it is determined whether or not the drive signal Son is input. If the drive signal Son is input in step ST4, the process proceeds to step ST5. If the drive signal Son is not input, the program ends.
In step ST5, which is shifted to when the drive signal Son is input in step ST4, the analog voltage signal Sa is converted into the digital voltage signal Sd.

Next, the process proceeds to step ST6, where the digital voltage signal Sd is accumulated as electrical signal data (accumulated data) having a predetermined waveform at regular time intervals, and this program is executed again by a timer interrupt.
On the other hand, in step ST2 which shifts when the stop signal Soff is input in step ST1, it is determined whether or not the stop timer Ts has reached a predetermined time (2 seconds). In step ST2, if the stop timer Ts has passed 2 seconds, the program is terminated. If the stop timer Ts has not reached 2 seconds, the process proceeds to step ST7 and the clock of the stop timer Ts is reached. After counting the signals, the process proceeds to step ST5.

Next, FIG. 4 shows a flowchart of the coagulation determination program.
In step ST10, the program first determines whether the keyboard input value Sk is any one of “1”, “2”, “3”, and “E”. If the keyboard input value Sk is “1”, “2”, “3”, or “E” in step ST10, the process proceeds to step ST11, where the keyboard input value Sk is “1”, “2”, If the symbol is neither “3” nor “E”, the process proceeds to step ST10 again.
In step ST11, it is determined whether or not the keyboard input value Sk is “E” indicating termination. If the keyboard input value Sk is “E”, the program is terminated, and the keyboard input value Sk is “E”. If not, the process proceeds to step ST12.

In step ST12, it is determined whether or not the keyboard input value Sk is “1” for selecting the first determination routine. If the keyboard input value Sk is “1”, the first determination routine in step ST13 is performed. If the keyboard input value Sk is not “1”, the process proceeds to step ST14.
In step ST14, it is determined whether or not the keyboard input value Sk is “2” for selecting the second determination reach. If the keyboard input value Sk is “2”, the first determination routine of step ST15 is performed. If the keyboard input value Sk is not “2”, the process proceeds to the third determination routine in step ST16.

After the first determination routine in step ST13, the second determination routine in step ST15, and the third determination routine in step ST16, the keyboard input value Sk is set to “0” in step ST17, and the process proceeds to step ST10.
Here, the first determination routine of step ST13 of FIG. 4 performs the processing shown in FIG. That is, electrical signal data having a predetermined waveform is referred to in step ST20 of FIG. Next, the process proceeds to step ST21, and the amplitude at the normal time (when the swing of the content C to which the forced vibration is applied to the vibration table 3 reaches the normal state) is calculated based on the electric signal data.

Then, the process proceeds to step ST22, and the amplitude of the steady state, by subtracting the predetermined margin to the average amplitude of the non-defective sample is compared with the threshold value H ₁ is a preset value, the amplitude of the steady state threshold H ₁ following proceeds to step ST23 in case, when the amplitude of the steady state is a value that exceeds the threshold value H ₁ shifts to step ST24.
In step ST23, the display “solidified” is output to the display unit 19, and in step ST24, the display “not solidified” is output to the display unit 19.

  Further, the second determination routine of step ST15 of FIG. 4 performs the process shown in FIG. That is, electrical signal data having a predetermined waveform is referred to in step ST30 of FIG. Next, the process proceeds to step ST31, and the envelope curve at the time of damped vibration (when forced vibration by the vibration table 3 is stopped and the swing of the contents C is damped) based on the electrical signal data is expressed as Y ( t) = k * exp (−a * t).

Next, the process proceeds to step ST32, where the attenuation constant a is calculated by least square approximation with the peak point of the waveform signal as the data point.
Then, the process proceeds to step ST33, and the damping constant a, compared with a threshold value H ₂ set in advance by adding a predetermined margin to the average value of the non-defective sample, in step ST34 when the attenuation constant a is the threshold value H ₂ or more migrated, the process proceeds to step ST35 when the attenuation constant a is below the threshold value _{H 2.}

In step ST34, the display “solidified” is output to the display unit 19, and in step ST35, the display “not solidified” is output to the display unit 19.
Further, the third determination routine of step ST16 in FIG. 4 performs the processing shown in FIG. That is, electrical signal data having a predetermined waveform is referred to in step ST40 of FIG. Next, the process proceeds to step ST41, and the steady-state amplitude is calculated based on the electrical signal data.

Next, the process proceeds to step ST42, and the amplitude after a certain time has elapsed (during damped vibration) after the forced vibration by the vibration table 3 is stopped is calculated based on the electric signal data.
Next, the process proceeds to step ST43, and the ratio between the amplitude in the steady state and the amplitude after the lapse of a fixed time (at the time of damped vibration) is calculated.
Then, the process proceeds to step ST44, and calculated ratio at step ST43, by comparing the threshold value H ₃ set in advance by adding a predetermined margin to the average value of non-defective samples, when calculated ratio is the threshold value T ₃ or less proceeds to step ST45, the calculated ratio is shifted to step ST46. If a value exceeding the threshold value H _3.
In step ST45, the display “solidified” is output to the display unit 19, and in step ST46, the display “not solidified” is output to the display unit 19.

Next, the procedure of the solidification inspection method for the contents of the packaging container using the solidification inspection apparatus having the above configuration and the operation of the apparatus will be described.
First, the packaging container 1 for performing a coagulation test is placed on the placement surface 2 a of the vibration table 2. At this time, preferably, the half region of the bottom surface of the packaging container 1 is on the load sensor 3 so that the packaging container 1 straddles both the mounting surface 2 a of the vibration table 2 and the top surface of the load sensor 3. As shown, the packaging container 1 is placed.

Next, the excitation table 2 is driven by the drive unit 3 for a predetermined excitation time, and a forced vibration is applied to the contents C enclosed in the packaging container 1. Here, since the natural frequency of the interface fluctuation of the contents C is about 3.6 Hz, the excitation frequency of the vibration table 2 is set to 1.2 Hz, which is 1/3 of the natural frequency. The excitation frequency of the vibration table 2 may be a frequency in the vicinity of 1/3 of the natural frequency. Further, the excitation frequency of the vibration table 2 may be the same as or close to the natural frequency of the interface oscillation of the contents C. By setting the excitation frequency of the excitation table 2 as described above, resonance easily occurs in the contents C to which the forced vibration is transmitted.
Then, the vibration time of the vibration table 2 is set to 3 seconds, forced vibration is applied to the packaging container 1, and the drive of the vibration table 2 is automatically stopped when the vibration time of 3 seconds is reached. At this time, the drive unit 3 outputs a drive signal Son to the PC 10 at the start of driving, and outputs a stop signal Soff to the PC 10 when driving of the vibration table 2 is stopped.

  The load sensor 3 measures the load change of the content C to which the forced vibration is applied from the time when the drive signal Son is input to the PC 10, and the analog voltage signal Sa proportional to the measured load of the load sensor 3 is the main voltage. It is converted into a digital voltage signal Sd via the A / D conversion unit 17 of the control unit 14, and is stored in the RAM 16 as electrical signal data of the contents C at the time of forced vibration (see the sampling data acquisition program in FIG. 3). . Even if the forced vibration of 3 seconds by the vibration table 2 is stopped, the load change of the content C in the damped vibration state is loaded for 2 seconds from the time when the stop signal Soff is input to the PC 10 simultaneously with the stop of the forced vibration. The analog voltage signal Sa measured by the sensor 3 and proportional to the measured load of the load sensor 3 is converted into a digital voltage signal Sd via the A / D converter 17, and the RAM 16 stores the electric power of the contents C during the damped vibration. It is stored as signal data (see the sampling data acquisition program in FIG. 3).

  Here, FIG. 8 shows electrical signal data (accumulated data of a predetermined waveform) measured by the load sensor 3 accumulated in the RAM 16, that is, measured waveforms at the time of forced vibration and damped vibration of the contents C (the horizontal axis represents time. The vertical axis is the digital voltage signal Sd). The symbol Af of the measured waveform in FIG. 8 indicates the steady amplitude at the time of forced vibration, the symbol B indicates the envelope at the time of the damped vibration, the symbol Ad indicates the amplitude at the time of the damped vibration, and the symbol Tw indicates the time of the damped vibration. Is the waiting time for measuring the amplitude Ad of the.

  Next, on the display unit 19 of the PC 10, “1” = first determination method (determining coagulation from the amplitude during forced vibration), “2” = second determination method (determining coagulation from the attenuation constant during damping vibration) ), “3” = third determination method (coagulation is determined from the ratio of amplitude during forced vibration and amplitude during damped vibration), “E” = end is displayed, so “1”, “2”, “ 3 ”or“ E ”is selected and input to the keyboard 20 (see the coagulation determination program in FIG. 4).

When the selection value “1” is input to the keyboard 20, the steady amplitude Af at the time of forced vibration is obtained with reference to the measurement waveform diagram of FIG. 8. Then, the steady amplitude Af is compared with the threshold value H ₁ which is a preset value by subtracting a certain margin from the average amplitude of the non-defective samples. When the steady amplitude Af is equal to or less than the threshold value H ₁ , the contents C There is judged to be solidified, and displays "are coagulation" on the display unit 19, when the amplitude Af of the constant is a value that exceeds the threshold value H ₁ determines that the contents C are non-solidified Then, “not solidified” is displayed on the display unit 19 (see the first determination routine of FIG. 5).

When the selected value “2” is input to the keyboard 20, the envelope B at the time of damped oscillation is expressed as Y (t) = k * exp (−a * t) with reference to the measurement waveform diagram of FIG. 8. ). Then, the attenuation constant a is calculated by least square approximation using the peak point of the waveform signal as a data point. Then, the damping constant a, by adding a certain margin to the average value of non-defective samples is compared with the threshold value H ₂ set in advance, when the attenuation constant a is the threshold value H ₂ or solidifies the contents C determines that there, displays "are coagulation" on the display unit 19, the attenuation constant when a is less than the threshold value H ₂ is determined with the contents of C is not solidified, thereby "clotting on the display unit 19 Is displayed (see the second determination routine of FIG. 6).

Further, when the selected value of “3” is input to the keyboard 20, referring to the measurement waveform diagram of FIG. 8, the steady amplitude Af at the time of forced vibration and the attenuation after the waiting time Tw has elapsed since the forced vibration stopped. The amplitude Ad during vibration is calculated. Then, calculate the amplitude Af of the constant, the ratio R between the amplitude Ad of the time damped oscillation, compared with this ratio R, the threshold H ₃ set in advance by adding a predetermined margin to the average value of the non-defective sample, It determined that when the ratio R is the threshold value H ₃ or more are coagulated contents C, displays "are coagulation" on the display unit 19, the ratio when R is a value below the threshold H ₃ Is determined that the content C is not solidified, and “not solidified” is displayed on the display unit 19 (see the third determination routine of FIG. 7).

  Then, when the selection value of “E” is input to the keyboard 20, the coagulation determination program ends. Further, for example, a selection value of “3” is input to the keyboard 20, and the coagulation inspection of the contents C is performed by the third determination method. If it inputs, the coagulation | solidification test | inspection of the content C can be continuously performed by a 2nd determination method or a 1st determination method, and three types (1st-3rd) determination methods can be switched arbitrarily.

Next, the effect of the solidification inspection method and apparatus for the contents of the packaging container according to this embodiment will be described.
The solidification inspection method for the contents of the packaging container of the present embodiment can be a non-destructive inspection method for measuring the load change during vibration of the contents C enclosed in the packaging container 1, and from the forced vibration Since only a change in load for a short time until damped vibration is measured, a rapid inspection method can be achieved. Further, since radiation such as X-rays that are harmful to the human body is not used as a measuring means, it is possible to provide a simple inspection method without the need for legal regulations or protection against exposure.

Moreover, desirably, the half region of the bottom surface of the packaging container 1 is on the load sensor 3 so that the packaging container 1 straddles both the mounting surface 2 a of the vibration table 2 and the top surface of the load sensor 3. Therefore, it is possible to reliably transmit the forced vibration and the damped vibration of the reciprocating motion in the substantially horizontal direction to the enclosed contents C without causing the packaging container 1 to fall down.
In addition, the vibration frequency of the vibration table 2 is the same as or close to the natural frequency of the interfacial oscillation of the contents C, or the same frequency as or near the odd number of the natural frequency. Therefore, resonance easily occurs in the content C to which the forced vibration is transmitted, and the amplitude of the stored electrical signal data (measurement waveform) measured by the load sensor 3 is amplified to facilitate determination of the solidification of the content C. be able to.

The first determination method for determining the solidification of the contents C is based on the measured waveform accumulated in the RAM 16 and the steady amplitude Af when the vibration table 2 is applying the forced vibration is a preset threshold value H. _Since it is determined that the content C is solidified when it is ₁ or less, it can be determined with high accuracy that the content C is solidified during forced vibration.
Further, the second determination method for determining the solidification of the contents C is based on the measurement waveform stored in the RAM 16 and the damping constant when the contents C is oscillating damped by stopping the forced vibration of the vibration table 2. calculates a, when the attenuation constant a is the threshold value H ₂ or more set in advance, since the contents of C is so determined to be solidified, the contents C is solidified during the damped oscillation This can be determined with high accuracy.

The third determination method for determining the solidification of the contents C is based on the measured waveform accumulated in the RAM 16 and the amplitude Af when the vibration table 2 is applying the forced vibration, and the forced vibration of the vibration table 2. the calculated ratios R of the amplitude Ad of after a predetermined time Tw has elapsed from the stop, when the ratio R is the threshold value H ₃ or more set in advance, so as to determine that the contents of C is solidified Therefore, the content C can be attenuated drastically, and an effective determination method can be used when a large number of peak points during attenuation cannot be obtained.

Furthermore, the apparatus for performing the coagulation inspection method of the present embodiment can be an inexpensive apparatus because the apparatus is composed of a combination of the vibration table 2, the load sensor 3 and the PC 10 that are generally widely used.
Furthermore, since the apparatus for performing the coagulation inspection method of the present embodiment observes only the behavior of the contents C enclosed in the packaging container 1, it is not affected by the material and shape of the packaging container 1, Since the reciprocating motion in the direction is applied to the packaging container 1, the solidification inspection can be performed even with the packaging container 1 having a non-rotating cross section.

In the above embodiment, when the friction between the mounting surface 2a of the vibration table 3 and the upper surface of the load sensor 3 is small and the packaging container 1 may slip, the packaging container 1 is replaced with the vibration table 3 and the load sensor. It is also possible to use any fixing means for fixing to.
Further, the alarm means may be provided in the PC 10, and the alarm means may issue an alarm when it is determined by the first to third determination methods that the content C is solidified.

DESCRIPTION OF SYMBOLS 1 ... Packaging container, 2 ... Shaking table, 2a ... Mounting surface, 3 ... Load sensor, 4 ... Drive part, 5 ... Recessed part, 10 ... PC (personal computer), 11 ... Reset circuit, 12 ... Power supply circuit, 13 ... Input port, 14 ... Main control unit, 15 ... ROM, 16 ... RAM, 17 ... A / D conversion unit, 18 ... Output port, 19 ... Display unit, 20 ... Keyboard, C ... Contents, H ₁ , H ₂ , H _3, threshold, Son, drive signal, Soff, stop signal, Sa, analog voltage signal, Sd, digital voltage signal (electrical signal)

Claims (11)

  A packaging container filled with contents having fluidity is placed on a shaking table, and by driving the shaking table, a forced vibration is applied to the packaging container by a reciprocating vibration in the left-right direction so that the shaking of the contents becomes steady. When it reaches, the forced vibration is stopped and the swinging of the contents is damped and the load change due to the swinging of the contents is converted into an electric signal by a load sensor, and this electric signal is accumulated. A solidification inspection method for the contents of a packaging container, wherein the solidification state of the contents is inspected based on waveform accumulated data.   The load sensor is embedded in a part of the mounting surface of the shaking table, and the packaging container is mounted so as to straddle another part of the mounting surface and the part of the load sensor. The method for inspecting the coagulation of the contents of a packaging container according to claim 1.   The frequency of the forced vibration by the shaking table is the same as or close to the natural frequency of the contents, or the same or close to the odd number of an odd number of the natural frequency. The solidification inspection method for the contents of the packaging container according to claim 1 or 2.   Based on the accumulated data of the predetermined waveform, it is determined that the content is solidified when an amplitude when the shaking table is applying the forced vibration is equal to or less than a preset threshold value. The solidification inspection method for the contents of the packaging container according to any one of claims 1 to 3.   Based on the accumulated data of the predetermined waveform, when the forced vibration of the shaking table is stopped to calculate a damping constant when the contents are damped and the damping constant is equal to or greater than a preset threshold value 5. The method for inspecting the coagulation of the contents of the packaging container according to claim 1, wherein the contents are determined to be coagulated.   Based on the accumulated data of the predetermined waveform, the ratio between the amplitude when the shaking table is applying the forced vibration and the amplitude after a certain time has passed since the forced vibration of the shaking table was stopped (= [Amplitude when applying forced vibration] / [Amplitude after a certain period of time has elapsed after stopping the forced vibration]), and when this ratio is equal to or greater than a preset threshold value, The solidification inspection method for the contents of a packaging container according to any one of claims 1 to 5, wherein the product is determined to be solidified. A shaking table that can apply a forced vibration due to a reciprocating vibration in the left-right direction on a packaging container in which a fluid content is enclosed;
A load sensor for measuring a load change caused by swinging of the contents and converting it into an electrical signal;
Accumulated data of a predetermined waveform that accumulates electrical signals of this load sensor,
A coagulation determination unit for determining a coagulation state of the contents based on the accumulated data of the predetermined waveform;   The frequency of the forced vibration of the shaking table is the same as or close to the natural frequency of the contents, or the same or close to the odd number of an odd number of the natural frequency. The solidification test | inspection apparatus of the packaging container content of Claim 7.   The coagulation determining means determines that the content is coagulated when the amplitude when the shaking table is applying the forced vibration is equal to or less than a preset threshold based on the accumulated data of the predetermined waveform. A coagulation inspection apparatus for a packaging container content according to claim 7 or 8, further comprising a first determination routine.   The coagulation determining means calculates a damping constant when the content is damped by stopping the forced vibration by the shaking table based on the accumulated data of the predetermined waveform, and the damping constant is preset. 10. A second determination routine for determining that the content is solidified when the content is equal to or greater than the threshold value, wherein the content of the packaging container is solidified according to claim 7. Inspection device.   The solidification determining means is configured to determine, based on the accumulated data of the predetermined waveform, the amplitude when the vibration table is applying the forced vibration, and after the vibration table has stopped the forced vibration and a predetermined time has elapsed. (= [Amplitude when applying forced vibration] / [Amplitude after a certain time has passed since the forced vibration is stopped]), and this ratio is equal to or greater than a preset threshold value. The packaging container contents coagulation inspection apparatus according to any one of claims 7 to 10, further comprising a third determination routine for determining that the contents are sometimes solidified.

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