JP3450895B2 - Shellfish freshness detector - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a non-destructive freshness of shellfish relates easily determine freshness determiner.

[0002]

[Prior Art] In general households, distribution stages, and fishing areas,
The varieties of seafood such as shellfish are judged by giving importance to the appearance. The freshness evaluation is a sampling method, and a hole for inserting an electrode into the shell is opened, and a fairly advanced destructive analysis is performed to judge. As a result, the shells, etc. were destroyed and the value of the product was impaired, and the equipment became so large that there was no room for entering the general household.

As an example, there is JP-A-63-259452. Hereinafter will be described the configuration and operation of the freshness of the prior of shellfish.

[0004] Figure 9 is a diagram showing the construction of a freshness of the prior of shellfish,
Figure 10 is the measured voltage characteristic diagram at death at the time of conventional shells energetic, FIG. 11 is a configuration diagram of a freshness indicator display of freshness of the prior shellfish.

Reference numeral 1 is a shellfish such as a clam, 2, and 3 are a pair of electrodes for making a hole in the shell of the clam 1 and making contact with an internal shell meat portion to detect a minute voltage.

Reference numeral 4 denotes a freshness determining means, which compares the measured voltage V1 detected by the electrodes 2 and 3 with the signal of the reference voltage generating means 5 having a preset reference voltage V2 to obtain the measured voltage V1.
Is smaller than the reference voltage V2 (V1 <V2), the signal L is output to the freshness display display 6.

The measured voltage input to the freshness determining means 4
When V1 is larger than the reference voltage V2 (V1> V2), the signal H is output to the freshness display 6. On the freshness display display 6, if the signal from the freshness determination means is H, FIG.
The electric light 8 of the "Kai: Genki" display plate 7 is turned on.

If the signal from the freshness determining means is L, the electric lamp 10 of the "shellfish: dead" display plate 9 in FIG. 11 is turned on.

[0009] The following-described configuration of a conventional shellfish having freshness determiner to about with operation 9, 10, will be described with reference to FIG. 11.

In FIG. 9, when measuring the clam 1, a hole is formed in the center of the shell of the clam so that the electrodes 2 and 3 can be inserted by a drill or the like, and the electrode 2 is inserted from above the hole. Insert 3 from the bottom to such an extent that it contacts the shell meat portion inside the clam 1.

In FIG. 10, when the shellfish is healthy, the measured voltage V1 generated from the pair of electrodes 2 and 3 is sent to the freshness determining means 4, and the freshness determining means 4 uses the reference voltage V2 of the reference voltage generating means 5 as the reference voltage V2. As a result of comparison, the measured voltage V1 is larger than the reference voltage V2 (V1> V2), so that the signal H is output to the freshness display 6.

In the freshness display 6 shown in FIG. 11, since the signal from the freshness determining means is H, the light 8 of the "shell: fine" display plate 7 is turned on. In Fig. 10, when the shellfish is dead, the measured voltage V1 becomes smaller than the reference voltage V2 (V
1 <V2) The signal L is output to the freshness display display 6.

In FIG. 11, the light 10 of the "shellfish: dead" display plate 9 is turned on.

[0014]

However, in the above configuration, in order to determine the freshness of the clam 1 as to whether it is healthy or dead, the shell of the clam 1 has two or more holes, and the electrodes 2 and 3 are shelled. Since it is inserted into the meat portion, the clam 1 is damaged, and the value as a product is lost. In addition, a tool for drilling holes is required, which makes it extremely difficult to use in a general household.

[0015] In view of the above problems, when determining the freshness of shellfish clams, etc., without the destruction of such drilling shellfish clams, etc., freshness instrument freely available shellfish at home Is provided.

[0016]

Means for Solving the Problems] freshness instrument shellfish of the present invention to achieve this object, in contact with the shell surface of the shellfish and the like, and an electrode for detecting a minute voltage, a small voltage of shellfish A voltage measuring means for amplifying to a measuring voltage, a reference voltage generating means for generating a reference voltage, a measured voltage measured by the voltage measuring means and a reference voltage of the reference voltage generating means are compared,
Composed of a determining freshness means freshness, and freshness indicator display for displaying the results measured by the freshness means
Has been done .

[0017] or, and setting means for setting for each shellfish,
It consists of the voltage switching means for switching the reference voltage of the reference voltage generating means by the value from the setting unit
It

[0018] Alternatively, the outer air temperature sensor, an outside air temperature detecting means for detecting the outside air temperature, measured counting means for outputting the determined measurement voltage sampling time from the voltage measuring means by the value from the outside air temperature detecting means It is composed of.

[0019]

According to the present invention, when the freshness of shellfish such as clams is determined by the above-mentioned structure, the micro voltage generated by contacting the electrode from the shell surface of shellfish without causing damage such as drilling The freshness state can be measured by detecting.

Further, the reference voltage can be changed according to the type of shellfish and the like, and various shellfish and the like can be dealt with, and the reaction delay of the shellfish and the like due to the outside air temperature can be accurately detected so that it can be detected easily in a general household. It will be possible to realize a freshness judging device for usable shellfish and the like.

[0021]

EXAMPLES below first embodiment shellfish freshness instrument of the present invention will be described. The same names and operations as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a schematic configuration diagram of a freshness judging device for shellfish in a first embodiment of the present invention, and FIG. 2 shows a relationship between measured voltages before and after amplification by a voltage measuring means in the first embodiment. It is a characteristic view to show.

The voltage measuring means 11 amplifies the minute voltage generated from the electrodes 2 and 3 attached so that the minute voltage generated on the surface of the shell of the clam 1 comes into contact with the surface of the shell of the clam 1.
Set the measurement voltage V1.

Reference numeral 4 is a freshness determining means, which compares the measured voltage V1 detected by the electrodes 2 and 3 with the signal of the reference voltage generating means 5 having a preset reference voltage V2 to obtain the measured voltage V1.
Is smaller than the reference voltage V2 (V1 <V2), the signal L is output to the freshness display display 6.

The measured voltage input to the freshness determining means 4
When V1 is larger than the reference voltage V2 (V1> V2), the signal H is output to the freshness display 6. On the freshness display display 6, if the signal from the freshness determination means is H, FIG.
The electric light 8 of the "Kai: Genki" display plate 7 is turned on. If the signal from the freshness determining means is L, the electric light 10 of the "shellfish: dead" display plate 9 in FIG. 11 is turned on.

[0026] Figure 1 with the following such freshness determiner conventional shellfish having a structure, FIG. 2, the operation will be described using FIG 11. When measuring the clam 1, the electrodes 2 and 3 are attached to the center of the shell of the clam 1 so as to contact the surface of the shell of the clam 1. In FIG. 2, when the shellfish is fine, the voltage measuring means 11 amplifies the minute voltage generated from the pair of electrodes 2 and 3 to obtain the measured voltage V1 and outputs it to the freshness determining means 4.

The freshness determining means 4 compares with the reference voltage V2 of the reference voltage generating means 5, and the measured voltage V1 is larger than the reference voltage V2 (V1> V2), so that the signal H is output to the freshness display display 6. On the freshness display display 6, since the signal from the freshness determination means is H, the electric lamp 8 of the "shellfish: fine" display plate 7 is turned on. When the shellfish is dead, the measured voltage V1 becomes smaller than the reference voltage V2 (V1 <V2), the signal L is output to the freshness display 6, and the light 10 of the "shellfish: dead" display plate 9 is turned on.

[0028] Next, a second embodiment shellfish freshness instrument of the present invention will be described. Figure 3 is a second schematic diagram of freshness determiner shellfish in the embodiment of the present invention, FIG 4 is a second configuration diagram of freshness instrument setting means shellfish in the embodiment of the present invention, FIG 5 is present It is a measurement voltage characteristic view for every shellfish in the 2nd Example of invention.

Reference numeral 12 is a setting means, which is composed of a setting knob 13, an indicator needle 17 for indicating a clam display 14, a clam display 15, and a bleeding display 16 for each type of shellfish. The type of shellfish being set is output to the voltage switching means 18.

In the reference voltage generating means 5, the reference voltage V2,
The reference voltage V3 and the reference voltage V4 are output to the voltage switching means 18. The voltage switching means 18 switches the reference voltage for each type of shellfish sent from the setting means 12 and outputs it to the freshness determining means 4.

For example, the reference voltage V2 is switched when the shellfish indicated by the pointer 17 of the setting means 12 is the clam display 15, the reference voltage V3 is switched when the clam display 14 is selected, and the reference voltage V4 is switched when the bleeding display 16 is selected. It will be output to the determination means 4.

The following such constituting with freshness determiner conventional shellfish having 3, 4, 5, the operation will be described with reference to FIG. 11. For example, when determining the freshness of the clam 1, the electrodes 2 and 3 are attached to the center of the shell of the clam 1 so as to contact the surface of the shell of the clam 1. When the mounting is completed, the setting knob 13 of the setting means 12 is rotated to move the pointer 17
To the clam display 15.

The setting means 12 outputs to the voltage switching means 18 that the clam display 15 is set.

The voltage switching means 18 selects the reference voltage V2 from the reference voltage generating means 5 as the reference voltage for determining the freshness of the clam 1, and outputs it to the freshness determining means 4.

In FIG. 5, the freshness determining means 4 compares the reference voltage V2 of the voltage switching means 18 and the measured voltage V1 is larger than the reference voltage V2 (V1> V2). Therefore, the signal H is output to the freshness display display 6. .

On the display 6 of the freshness display, the signal from the freshness determining means is H, so that the light 8 of the "shell: fine" display plate 7 is displayed.
Lights up.

When the shellfish is dead, the measured voltage V1 is the reference voltage V
When it is smaller than 2 (V1 <V2), the signal L is output to the freshness display 6 and the electric lamp 10 of the "shellfish: death" display 9 is turned on.

In addition, in FIG. 5, a clam display 1
In the same manner, the measurement voltage V1 of each of the bleeding lines 4 and 16 is different, so that the voltage switching means 18 changes the reference voltage V
3. The reference voltage V4 is switched to determine the freshness according to the type of shellfish.

[0039] Next, a third embodiment shellfish freshness instrument of the present invention will be described. Figure 6 is a third schematic diagram of freshness instrument shellfish in the embodiment of the present invention, FIG. 7 is a third characteristic diagram of the ambient air temperature and the sampling time of measurement count unit in the embodiment of the present invention, FIG. 8 FIG. 6 is a measured voltage characteristic diagram for each outside air temperature in the third embodiment of the present invention.

Reference numeral 19 denotes an outside air temperature detecting means for converting the outside air temperature detected by the outside air temperature sensor 20 into an outside air temperature T. The converted outside air temperature T is sent to the measurement counting means 21.

The measurement counting means 21 is the voltage measuring means 11
The sampling time is determined from the measured voltage V1 and the outside air temperature T of the outside air temperature detection means 19, and the average of the peak voltage values during the sampling time is output as the measured voltage VV1 to the freshness determination means.

Reference numeral 4 is a freshness judging means, which is a measurement counting means 2
When the measured voltage VV1 measured in 1 is compared with the reference voltage V2 of the reference voltage generating means 5 having a preset reference voltage, and the measured voltage VV1 is smaller than the reference voltage V2 (VV1
<V2) The signal L is output to the freshness display display 6.

The measured voltage input to the freshness determining means 4
Signal V when VV1 is higher than reference voltage V2 (VV1> V2)
Is output to the freshness display display 6.

Freshness display In the display 6, if the signal from the freshness determination means is H, the "shellfish: fine" display plate 7 in FIG.
The electric light 8 is turned on. The signal from the freshness determination means is L
Then, the electric light 10 of the "shellfish: dead" display plate 9 in FIG. 11 is turned on.

[0045] Figure 6 with the following such freshness determiner conventional shellfish having a structure, 7, 8, the operation will be described with reference to FIG. 11.

For example, when determining the freshness of clams 1,
The electrodes 2 and 3 are attached to the center of the shell of the clam 1 so as to contact the surface of the shell of the clam 1. Outside temperature detecting means 1
9 detects the outside air temperature T from the outside air temperature sensor 20.

In FIG. 7, the measurement count means 21 determines the sampling time TM from the detected outside air temperature T. For example, when the outside air temperature is 10 to 20 degrees, the sampling time is 10 seconds, and when the outside air temperature is 21 to 30 degrees, the sampling time is 30 seconds.

In FIG. 8, the measurement counting means 21 is
During the determined sampling time TM, the peak value of the measurement voltage V1 of a plurality of pulses can be detected.

For example, when the outside air temperature is 10 to 20 degrees, the sampling time is 30 seconds, so three peak values of P1 ', P2', and P3 'are detected, and the measured voltage VV1 is calculated from the following equation .

VV1 = (P1 '+ P2' + P3 ') / 3

When the outside air temperature is 21 to 30 degrees, the sampling time is 10 seconds, so three peak values of P1, P2 and P3 are detected and the measured voltage VV1 is calculated from the following equation .

VV1 = (P1 + P2 + P3) / 3

In the freshness determining means 4, the reference voltage V2 of the reference voltage generating means 5 and the measurement voltage VV1 of the measurement counting means 21.
The measured voltage VV1 is larger than the reference voltage V2 (V1
> V2), the signal H is output to the freshness display display 6.

Freshness display In the display 6, since the signal from the freshness determining means is H, the light 8 of the "shell: fine" display plate 7
Lights up. If the shellfish is dead, the measured voltage VV1 is the reference voltage.
When it is smaller than V2 (V1 <V2), the signal L is output to the freshness display 6 and the light 10 of the "shellfish: dead" display 9 is displayed.
Lights up.

That is, according to the configuration of the above-described embodiment, when determining the freshness of shellfish such as clams, it is generated by contacting the electrode from the surface of the shell of shellfish or the like without breaking the shell or the like by puncturing or the like. The freshness state can be measured by detecting a minute voltage.

Further, the reference voltage can be changed according to the type of shellfish and the like, and various shellfish and the like can be dealt with, and since it is possible to detect accurately by correcting the reaction delay of the shellfish and the like due to the outside air temperature, it is easy for general households to feel free to use. the ability to realize the freshness determiner available shellfish.

[0057]

The present invention as described above, according to the present invention contacts the shell surface of the shellfish, and electrodes for detecting a minute voltage, a voltage measuring means for measuring a voltage and amplifies the small voltage of shellfish, the reference voltage A reference voltage generating means for generating, a freshness determining means for comparing the measured voltage measured by the voltage measuring means with a reference voltage for the reference voltage generating means to determine freshness, and a result measured by the freshness determining means. in the freshness indicator display to display
When determining the freshness of shellfish by configuring, shellfish
Etc. without destroying holes, etc.
By contacting the poles and detecting the minute voltage generated
The freshness state can be measured .

[0058] or, and setting means for setting for each shellfish,
To be composed of a voltage switching means for switching a reference voltage of said reference voltage generating means by the value from the setting unit
Various shellfish, etc. by changing the reference voltage depending on the type of shellfish, etc.
Can handle .

[0059] Alternatively, the outer air temperature sensor, an outside air temperature detecting means for detecting the outside air temperature, measured counting means for outputting the determined measurement voltage sampling time from the voltage measuring means by the value from the outside air temperature detecting means in by constituting, since it is possible to accurately detect by correcting the reaction delay of shellfish such as by outside air temperature,
Can be freely available shellfish freshness instrument is realized at home, its practical effects are those large becomes.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a freshness determining device for shellfish according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram showing a relationship between measured voltages before and after amplification by the voltage measuring means in the first embodiment.

FIG. 3 is a schematic configuration diagram of a freshness determiner for shellfish according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of setting means of a freshness determining device for shellfish according to a second embodiment of the present invention.

FIG. 5 is a measured voltage characteristic diagram for each shellfish in the second embodiment of the present invention.

Figure 6 is a schematic block diagram of freshness instrument shellfish in the third embodiment of the present invention

FIG. 7 is a characteristic diagram of the outside air temperature and the sampling time of the measurement counting means in the third embodiment of the present invention.

FIG. 8 is a measured voltage characteristic diagram for each outside air temperature in the third embodiment of the present invention.

Figure 9 is a schematic block diagram of the freshness of the prior of shellfish

FIG. 10: Characteristic diagram of the measured voltage when the shellfish is healthy and when it is dead

Figure 11 is a configuration diagram of a freshness indicator display of freshness of the prior shellfish

[Explanation of symbols]

1 clams 2 electrodes 3 electrodes 4 Freshness judging means 5 Reference voltage generating means 6 Freshness display 11 Voltage measuring means 12 Setting means 18 Voltage switching means 19 Outside temperature detecting means 20 Outside air temperature sensor 21 Measurement counting means

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-225987 (JP, A) Shigeru Kuwana, Electrical Properties of Shellfish, Proc. ), Japan, June 5, 1993, p. 12 (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01N 27/00-27/49 G01N 33/02 JISST file (JOIS)

Claims (3)

(57) [Claims] 1. A contact with the shell surface of the shellfish, and electrodes for detecting a minute voltage, a voltage measuring means for measuring a voltage and amplifies the small voltage of shellfish, and the reference voltage generating means for generating a reference voltage, There is a freshness determination means for comparing the measured voltage measured by the voltage measurement means with the reference voltage of the reference voltage generation means to determine freshness, and a freshness display display for displaying the result measured by the freshness determination means. freshness instrument <br/> shellfish which is characterized in that the. 2. A setting means for setting for each shellfish, according to claim 1 which is characterized by having a voltage switching means by the value from the setting unit switches the reference voltage of the reference voltage generating means freshness decision unit of shellfish. By wherein the outside air temperature sensor, determine an outside air temperature detecting means for detecting the outside air temperature, the sampling time from the voltage measuring means by the value from the outside air temperature detecting means
Freshness instrument shellfish according to claim 1, characterized in that a measuring counting means for outputting a constant measured voltage.