JP2006030083A - Decision system of meat quality of fish - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decision system of the meat quality of a fish, capable of deciding the quality of a caught aquatic product represented by a fish of higher grade, such as tuna, bonito or the like simply, rapidly and accurately. <P>SOLUTION: The decision system of the meat quality of the fish is constituted so as to measure the impedance of the meat part of the fish, to decide the quality of the meat part and equipped with an impedance measuring means for dividing the fish into a plurality of predetermined regions to measure the impedances of the predetermined regions, a database for aquiring the meat quality data of the fish including the individual data of the fish and the data related to the measured impedances of the predetermined regions of the fish to accumulate them, and a fish meat quality evaluating and decision means for evaluating and deciding the meat qualities of the predetermined regions of the fish from the measured impedance values and the database. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a system or method for determining the quality of a fish body, and more specifically, the fish quality of a fish captured in a fishing vessel, even when landed on the fishing vessel. The present invention relates to a fish meat quality judgment system or method which can be easily and accurately measured to judge the quality.

  Traditionally, trading of luxury large fish such as tuna (bonito: bonito) and bonito (fish: bonito) has been going on the ocean for several months, raising them on the ship so as not to damage the fish on the longline. Immediately crawl, remove blood and remove internal organs, quickly cool to -60 ° C in a freezer, store frozen, and land when the ocean ship returns to a buyer such as a trading company or middleman It was handed over. At this time, it was determined that the frozen fish were placed in a market where the middleman was present, and a person with craftsmanship skill estimated the meat quality from the cross-section of the tail. However, this is a content determination method that is far from accurate and objective evaluation of fish quality, and it has been desired to establish an objective meat quality determination method based on measurement data and the like. In addition, the current meat quality judgment method has a problem that the buyer is forced to deal with the fish by speculative and subjective judgment, so that the seller is forced to be extremely disadvantaged.

In Japanese Laid-Open Patent Publication No. 2002-17243, which has already been disclosed, a process of sorting wild and live fish into the process until the tuna is frozen, and the tuna that has been live-fished is fillet processed. It is described that immediately after freezing, the freshness state after thawing is remarkably improved and becomes “high freshness”. In the invention of this publication, tuna in a state of “high freshness” is achieved by a combination of an active technique that achieves a high freshness state and a freezing method that maintains the quality of the active raw fish body, and further, Proposed to identify and deliver to customers.
JP 2002-17243 A

  In the actual fish trade, the frozen tuna is landed and the buyer makes a subjective assessment against his own experience. In the case of the method of the patent application, the quality of tuna after freezing can be maintained (almost as it is) immediately after catching. If the quality can be measured objectively and quantitatively, the measured quality information can be applied to the trade of the frozen tuna that has been landed. In addition, as shown in the above patent application, in order to maintain the freshness state of the tuna that has just been caught on the fishing boat, the tuna that has been alive in a live fish state is immediately frozen and stored. It is necessary to keep. At this time, the tuna disassembly time before frozen storage is only about 10 minutes, so if there is a method that can quickly and accurately determine the quality of the tuna within this time, it will be landed and handed over to buyers such as trading companies and middlemen The quality of the tuna can be determined before being processed.

  In this way, the tuna meat quality judgment technology will be put to practical use, and it will be possible to send quality information to the market in advance at the time of catch and measurement, and appropriate distribution of high-quality fish such as high-quality fish Can be greatly contributed, such as reducing the distribution cost. In other words, in normal tuna trade, the fish are thawed once and placed on the market to check the quality of the buyer in order to obtain the buyer's evaluation. If not, the deterioration over time becomes more and more difficult for the seller. In this situation, the fishermen who are sellers are extremely unfavorable in dealing with fresh fish, especially tuna, which has a high unit price. It was a serious issue.

  In view of the above-described conventional problems, the present invention can easily and quickly determine the quality of fishery products represented by high-grade fish such as tuna and skipjack, and can also be used to freeze fishery products such as tuna freshly caught on a fishing boat. It is an object of the present invention to provide a fish meat quality judgment system that can easily and accurately judge without taking time before storage.

The fish flesh quality judgment system according to the present invention has been made to solve the above-described problems, and includes the following means.
(1) A system for measuring the impedance of a meat part of a fish body and judging its quality,
An impedance measuring means for dividing the fish into a plurality of predetermined parts and measuring the impedance of each part;
A database for acquiring and accumulating fish flesh information including individual data for each fish and data on measured impedance for each part of the fish;
A fish flesh quality evaluation system comprising: a fish flesh quality evaluation judging means for evaluating and judging the flesh quality for each part of the fish from the measured impedance value and the database.

(2) In the fish flesh judgment system of (1),
The individual data for each fish includes data on at least one of fish type / weight / girth circumference / volume / body length.
(3) In the fish flesh judgment system of (1),
As the data relating to the impedance, data on the part or position where the impedance is measured, and distance data from the surface of the fish electrode for measurement are included.
(4) In the fish flesh judgment system of (1) to (3),
The fish body is a tuna (fish), and includes 6 sites of back heel / back naka / back heel / abdominal heel / abdominal shark / abdominal peach / as the respective portions where the impedance is measured.
(5) In the fish flesh judgment system according to (1) to (4),
The database comprises data for evaluation criteria set for meat quality evaluation determination,
The measurer can reset the evaluation reference data according to the measurement.
(6) In the fish flesh judgment system according to (1) to (4),
Individual (fish) information including at least one of measured individual (fish) data, date / time data when the individual (fish) was captured or measured, temperature data, position data (using GPS, etc.) If the storage means such as a tag or a tag with a digital pattern is stored, and this storage means is attached to or embedded in an individual (fish body), it is possible to obtain a fish body quality judgment system with assured traceability.

  According to the fish flesh quality judgment system according to the present invention, a system that can easily and quickly judge the fish quality of fishery products represented by high-class fish such as tuna and bonito can be provided, such as tuna just caught on a fishing boat. Even for fishery products, it is possible to evaluate and judge the quality of fish meat more easily and more accurately in a short time before being frozen and stored on a fishing boat.

  In addition, there was a method of measuring quality by measuring the resistance of meat using the DC method from the past, but the conventional DC method has a drawback that the resistance value increases depending on the direction of inserting the electrode, and the measured value is Reliability was poor. The reason is that the fleshy cells are loaded with capacitance, so that the current flows through the surface without passing through the cells, but the shape of the cells is not constant, and the current depends on the direction of the electrodes. This is because the route changes. According to the system for measuring impedance by the alternating current method employed in the present invention, since the current passes through the cell, it is possible to measure almost the same resistance value regardless of the direction of the electrode, and the reliability of the measurement data. The sex can be improved dramatically.

  Furthermore, in the fish meat quality determination system according to the present invention, the database includes evaluation standard data set for meat quality evaluation determination, and the measurer can reset the evaluation standard data according to the measurement. This makes it possible to reset the disparity, for example, the general market price standard, how expensive fat is to lean. That is, in the onboard transaction method described in Japanese Patent Application Laid-Open No. 2002-17243 of [Patent Document 1], the market information, that is, how the tuna of the quality that was actually primarily evaluated was evaluated in the market, the result Based on the above, the evaluation method will be re-established. Although the evaluation of fat is high today, the evaluation of red meat (popularity) will increase from a nutritional point of view, and new recipes will temporarily boom. In other words, it is considered that other parts may be specifically supported. Therefore, in the present invention, it is possible to sufficiently cope with such a change in evaluation criteria in the determination. did.

Next, an embodiment of a fish body quality determination system according to the present invention will be described in detail with reference to the drawings.
FIG. 1 (1) is a configuration diagram of the entire fish flesh judgment system according to the present invention. The fish discrimination system 100 measures impedance from each part of the fish, and relates to individual data for each fish and measurement impedance for each part of the fish. A database for acquiring and storing fish body quality information including data is provided, and the meat quality for each part of the fish body can be evaluated and determined based on the measured impedance value and the database.

This fish body discrimination system 100 is connected to the measuring instrument main body 10 by the connecting means 63 such as the measuring instrument main body 10 as a main device, the measuring instrument main body 10 connected by the wireless or wired connecting means 61, and the RS422. A computer 30 such as a notebook personal computer, and an electronic scale 40 for measuring the weight of a fish connected to the measuring instrument main body 10 by connection means 62 such as RS232C.
The connection means between the electronic balance 40 and the measuring instrument main body 10 in FIG. 1 (1) uses a wired system by RS232C here, but is not limited to this, and a wireless system may be used. Of course, such a wireless system will be described later with reference to FIG. The connection means (61, 63) is the same, and may be a wired system or a wireless system.
The computer 30 includes a database for acquiring and storing data such as input individual data for each fish and measured impedance for each part of the fish, and based on these data, the fish It is possible to perform a comparative calculation of the meat quality for each part, determine this based on an evaluation criterion such as a quality level, and visually display quality quality.

  Furthermore, in the fish meat quality determination system according to the present invention, the database has evaluation standard data based on the evaluation standard. The data for evaluation standard is usually set by the computer 30 so that it becomes a standard for meat quality evaluation determination, but it may be set again by the measurers according to circumstances. This makes it possible to reset the disparity, for example, the general market standard, how expensive fat is to lean.

  FIG. 1 (2) is an enlarged view showing an example of the front display portion of the measuring instrument main body 10. The measuring instrument main body 10 has a display unit 11, and the measured impedance value and the input fish body. The data such as the weight of the fish, the body length of the fish, the individual ID number of the fish, the position and position of the fish, the distance from the surface of the fish to the surface of the fish, and the like can be displayed. And the numeric keypad part 12 for inputting various data numerically, and the fish body part input part 13 for inputting the measurement position corresponding to each part of the fish body to be measured are provided. 1 (3) is an enlarged view of the measurement probe 20. This measurement probe 20 performs gripping portion 21 for a measurer to hold or hold, and power ON / OFF. A hand switch 23, and an electrode portion 22 having four measuring electrodes for directly contacting the fish surface or piercing the fish meat.

  Further, FIG. 1 (4) is a system diagram showing an example in which connection coordination is performed using radio in connection between the electronic balance 40 and the measuring instrument main body 10. Here, an electronic suspension balance 41 for placing a fish body and measuring its weight, and a wireless receiver 43 connected to the measuring instrument main body 10 by RS232C are connected to each other by wireless connection means 42 so as to cooperate with each other. Yes. The electronic suspension scale 41 has a display unit 41a and an antenna 41b. When the weight value of the fish is measured, it is converted into an electrical signal and output to the wireless receiver 43. The wireless receiver 43 has a display unit 43a and an antenna 43b, receives measurement data from the electronic hanging balance 41, and transmits it to the measuring instrument main body 10 side via RS232C.

  FIG. 2 is a diagram showing an impedance measurement circuit 70, and this circuit 70 has a configuration for connecting an electrode portion 22 for measuring impedance. This electrode part 22 has four electrodes (a1, a2, b1, b2) arranged on a straight line, and these electrodes are brought into contact with the fish body surface or pierced into the flesh of the fish body. Measure the impedance. Next, FIG. 3 is an enlarged view showing the details of the electrode portion 22 shown in FIG.

  Of the four electrodes shown in FIG. 3, the two electrodes (a1 and a2) outside the electrodes are current driving electrodes for driving a current between two predetermined points of the fish to form a current path. Or it is a pair of electrodes called a power feeding side electrode. The remaining two electrodes (b1, b2) on the inner side are a pair of electrodes called a voltage measuring electrode or a detection side electrode for measuring a voltage between two points flowing in the current path. These four electrodes (a1, a2, b1, b2) are covered with insulating tubes (c1, c2, c3, c4) except for the tip of the acute-angled protrusion for contact and piercing, and are insulated. Is connected to the lead wire connection terminals (e1, e2, e3, e4) via the grip tip 21 ', and is connected to the impedance measurement circuit 70 from there, and the impedance of each part of the fish body is measured. The

  These four electrodes (a1, a2, b1, b2) have tips that are uniformly sharp and pointed at their tips, and are easy to insert into the flesh when pressed against the surface of the fish. All of the four electrodes (a1, a2, b1, b2) can be reliably inserted into the flesh of the fish body to obtain electrical continuity.

Returning to FIG. 2, in the impedance measuring circuit 70 according to the present invention, an oscillation circuit 71, an amplifier circuit (positive pulse) 72, an amplifier circuit (negative pulse) 72 ′, a differential amplifier circuit 73, a sample hold circuit 74, an A / D It has components of a conversion circuit 75, a CPU 76, and a display (resistance value) 77.
The oscillation circuit 71 generates a pulse current, but the amplifier circuit (positive pulse) 72 is connected to the current driving electrode a1 to give a positive pulse, and the amplifier circuit (negative pulse) 72 is connected to the current driving electrode a2. A positive pulse is applied to form a current path between two points of electrode a1 and electrode a2.

  The electrodes (b1, b2) for voltage measurement detect and measure the voltage flowing in the alternating current path generated between two points by the pulse current. The measured voltage is input to the CPU 76 via the differential amplifier circuit 73-sample hold circuit 74-A / D conversion circuit 75, and the impedance of the meat part of the fish body is measured in this way, and the resistance is displayed on the display. The value is displayed. In the measurement, impedance data for the whole fish is obtained by repeating individual measurements for each part of the integrated fish, and the measurement data obtained for each part and various data stored in the database so far Is used to perform a comparative calculation, thereby determining the relative quality of each part between a plurality of fish and between one fish.

Next, with reference to FIGS. 4 to 8, experimental examples for performing quality determination such as discrimination of fat and red meat by measuring impedance of a plurality of parts of tuna (fish) that are fish bodies will be described. This will be described in detail.
In this measurement, the impedance measuring apparatus 100 described above with reference to FIGS. 1 to 3 is used. This apparatus 100 includes a measuring instrument main body 10, a LAN cable 63, an RS232C62, a database, data processing, and a fish body. The impedance of the tuna 50 is measured using the notebook personal computer 30 for determining the meat quality, the measurement grip (with electrode) 20 and the electronic balance 40 as constituent elements.

In the fish meat quality determination system using the impedance measuring apparatus 100 according to the present invention, it is preferable to design and form as follows.
-Since the tuna dismantling time is about 3 to 5 minutes, it should be designed as a system that can measure quickly and accurately within that time.
・ The numeric keypad provided on the measuring instrument is mainly used to input numbers such as fish number. However, since workers always use gloves such as work gloves at the work site, the numeric keypad is easy to press. It should be large and robust. In addition, since the measuring device including the numeric keypad is used on a ship at sea, it is preferable that the measuring instrument is configured with excellent waterproofness and weather resistance so that it is not easily affected by weather or seawater.
・ It is convenient to use a lifting system as an electronic scale.
In order to eliminate any useless movement in the tuna fish stapling / measurement / processing / disassembly process, a system should be adopted in which tuna on the scale is promptly sent to the next step.
・ On board, there may be a problem of radio interference.

  As a fish meat quality judgment system having an impedance measuring device, a system of the type that is brought into a ship and used on the ship has been described. However, the fish meat quality judgment system according to the present invention is not limited to the above-mentioned use. It can also be used in places on land such as on-site and fish processing plants. About the type of apparatus used on board, it is good to design and build as a system well verified according to the field about the usability of the apparatus and the confirmation in terms of safety.

<Experimental report on tuna lipid measurement>
FIG. 4 is a side view (1) and a cross-sectional view (2) of the tuna 50 to be measured. As shown in the side view (1), the measured location of the tuna 50 is each part on either the front surface or the back surface, and if divided into large parts [(back kami / back naka / back shimo + abdominal kami / (Abdominal Naka / Abdominal Shimo) × Left / Right]]. According to the general classification of Tuna 50, each portion of back kami / back naka / back moss / abdominal moss is “red”, abdominal kami is “large tro”, and abdominal naka is “medium tro”. In addition, in the tuna 50, as shown in the sectional view (2), except for (1) dorsal fin, (7) blood clot, (10) abdominal fin bone, (2) divided, (3) boned, (4) Red, (5) Top, (6) Blood is all red, but it is the part that hits the outside of the abdomen. (8) Abdomen Naka and (9) Large Toro are rich in fat and fine. It is said to be meat quality.

  In the experiment according to the present invention, measurement was performed on three tuna bodies, and an experiment was performed to determine the meat quality of an individual. Here, the impedance values at each part of the tuna specimen were measured using a conventionally known body fat measuring device. Thereby, the impedance value is obtained from the measurement data obtained by actual measurement for three tuna specimens, and the meat quality, that is, the fat amount can be discriminated by statistically calculating and calculating the meat quality at each part of the fish body. Was found to be easy to judge.

As shown in FIG. 5, the data of the three tuna bodies used in this experiment are as follows.
・ Tuna A (Tuna) Weight 18Kg (No bones: 8.3Kg)
Girth around 77.6cm
Volume 18.0L (half body 9.0L x 2)
・ Tuna B (Tuna tuna) Weight 22Kg (without one bone: 9.8Kg)
Girth around 83.5cm
Volume 20.4L (half body 10.2L x 2)
・ Tuna C (South Indian Tuna) Weight 34Kg (without single bone: 12.6Kg)
Girth 91.0cm
Volume 26.6L (half body 13.3L x 2)

As shown in FIG. 4, tuna (A, B, C) used in the experiment was divided into three pieces of kami / naka / shimo /, and divided into a dorsal side and a ventral side. It was classified as a part, and the impedance was measured at each part. The six parts of the tuna that were measured were the back kami (red) / back naka (red) / back shimo (red) / abdominal kami ( Large Toro) / Abdominal Naka (Medium Toro) / Abdominal Shimo (Red) /.
6 (1) (2), 7 (3) (4) (5) (6) and 8 (7) (8) (9) are impedances at each part of tuna (A, B, C). The measurement data described here is an average value of a plurality of data at a corresponding location, and all units are Ω (ohms). In addition, there is a part which could not be measured due to circumstances such as insufficient thickness of part of the tuna.

Fig. 6 (1) Impedance measurement 1: Neck (back edge)
Tuna A Tuna B Tuna C
Neck 1: 150 50-(no measurement)
Neck [shallow]: 110 40-(no measurement)
Neck [deep]: 85 45 30
Neck [below]: 80 40 20
In the measurement at the neck (back edge), the impedance of the tuna A, tuna B, and tuna C is measured at four parts: neck 1 / neck [shallow] / neck [deep] / neck [deep]. It was measured. It is considered that the higher the impedance value, the higher the resistance, and the higher the quality of meat with a high fat content, that is, the greater the tuna portion of tuna. Here, it is clear from the data that the meat quality is good in the order of 1) tuna A, 2) tuna B, 3) tuna C, and the quality of the tuna (A, B, C) of the same body is better as it is shallower from the neck I understood that. The measurement data obtained this time can be determined for the quality of the tuna by comparing the data including the past accumulated data, and the result can be displayed on the display unit if necessary. .

Fig. 6 (2) Impedance measurement 2: Abdominal heel part-Tuna A: 210-Tuna B: 50-Tuna C: 30
The impedance measurement at the stomach part shows that the impedance of tuna A is extremely high and the meat quality is good. The data show that the quality of the tuna B and tuna C has dropped considerably in the order, and in comparing this abdomen, there is a big difference between “tuna A” and “tuna B / tuna C”. It is clear that

Fig. 7 (3) Impedance measurement 3: Back heel part-Tuna A: 65-Tuna B: 37-Tuna C: 32
In the impedance measurement at the back heel portion, it is presumed that the tuna A has higher impedance than the tuna B and the tuna C, and the meat quality is good. Although the impedance of tuna B and tuna C is low, the difference between tuna A and the quality of the tuna A is not as great as the data in the previous “abdomen kami part”, and the difference in quality is small in this back scab part. It seems to be.

Fig. 7 (4) Impedance measurement 4: Back heel part-Tuna A: 85-Tuna B: 43-Tuna C: 18
In the impedance measurement at the back portion, the impedance has been reduced at a roughly proportional value such as tuna A> tuna B> tuna C, and it is estimated that the meat quality has decreased in this order. According to the data in the “back Naka”, it is determined that the difference in quality among tuna A, tuna B, and tuna C is somewhat large.

Fig. 7 (5) Impedance measurement 5: Abdomen Naka part-Tuna A: 65-Tuna B: 32-Tuna C: 36
In this impedance measurement at the abdomen, tuna A has a higher impedance than tuna B and tuna C, and its meat quality is estimated to be good, but the difference in impedance between tuna A, tuna B, and tuna C Is not so large, and tuna C has a slightly larger value than tuna B. It is determined that the difference in quality in the stomach part is small compared to other parts.

Fig. 7 (6) Impedance measurement 6: Whole body ・ Tuna A Whole body: 140 Whole body equal length: 160
・ Tuna B whole body: 95 whole body equal length: 85
・ Tuna C whole body: 80 whole body equal length: 70
This measurement is different from the conventional measurement in that it is impedance measurement of each tuna having the whole body and whole body equal length, and taking into account the whole body length data of the tuna. As before, the results of the measured values of tuna A> tuna B> tuna C are higher in the order of tuna A> tuna B> tuna C, and the meat quality is presumed to be good. And when comparing the three tuna bodies with this whole body (whole body equal length), the difference in impedance between individuals is not so great, and the difference in quality is less when viewed as a whole. is expected.

In the impedance measurement of (7) to (9) after this, the measurement is performed with the tuna opened in half.
Fig. 8 (7) Impedance measurement 7: Surface contact method of the open half
Tuna A Tuna B Tuna C
Back heel (*): 55 58 57
Back kami center: 44 32 32
Middle part of stomach: 42 34 22
Lower stomach: 92 23 24
Here, it is the data measured by the contact method on the surface of the heel portion where the tuna is opened to the half body, and in the order of tuna A> tuna B> tuna C, and back kami (middle)> abdomen kami (middle)> The measured value that the impedance was higher in the order of the stomach belly (bottom) was obtained. In addition, according to the data (*) of the back fistula obtained for different samples on different days, there is also a result that there is not much difference between tuna A / tuna B / tuna C. This seems to be largely due to the method of measuring the surface of tuna.

Fig. 8 (8) Impedance measurement 8: Kami part superficial needle inspection
Tuna A Tuna B Tuna C
Back heel (*): 84 52 58
Back kami center: 50 52 50
Middle part of stomach: 42 48 28
Lower stomach: 110 62 48
This is data obtained by measuring a half-opened kami portion by a shallow meter reading method, and it is noticeable that the impedance value of tuna A in the abdominal kami (lower) is extremely high. In addition, according to the data (*) of the back bead obtained for different samples on different days, the result is that tuna A is a high value but tuna B and tuna C are not so different. ing. This seems to be a large part of the meter reading method based on shallow insertion, where the tuna surface is measured at a shallow surface.

Fig. 8 (9) Impedance measurement 9: Depth meter reading method
Tuna A Tuna B Tuna C
Back kami middle: 90 60 44
Middle part of stomach: 60 55 26
Lower stomach: 120-40
These are data obtained by measuring a half-opened kami portion by a deep-needle metering method, and the measurement values as before have been obtained that the impedance is higher in the order of tuna A> tuna B> tuna C. In addition, the data obtained for tuna A stomach belly (bottom) is extremely high. In the measurement by this deep-needle metering method, where the electrode is inserted deep into the tuna flesh, the measured value of the tuna flesh seems to indicate a characteristic tendency with stable data.

In the fish flesh quality judgment system according to the present invention, as shown as experimental examples so far, the impedance measurement (1-9) data and individual data for each fish body are acquired, and these are accumulated in a database and comprehensively processed by a computer. The data is analyzed to determine the quality of the fish meat at each part. In quality judgment, for example, each part of the fish body may be ranked on the display unit with a number ranging from 1 to 9, for example, and displayed as excellent, good, average, slightly inferior, inferior, impossible, etc. May be.
As individual data for each fish body, data relating to any of the type / weight / body circumference / volume / body length of the fish is collected. It is advisable to collect distance data from the extreme fish surface, store it in a database together with past data, and perform comprehensive quality judgment by taking these data into account.

Now, the fish meat quality determination system configuration diagram including the impedance measuring device main body 210, that is, the impedance measurement system 200 will be described in more detail using the impedance measurement system 200 (FIG. 9) and its external view (FIG. 10).
FIG. 9 is a block diagram of an impedance measurement system 200 according to the present invention, which can measure vaginal impedance and collect data for verifying the correlation between body fat percentage and impedance. . In this system 200, the impedance measuring device main body 210, the electrode 220, the electrode cable (94), the RS422 cable (92), the RS422 / RS232C (83, 231), the AC / DC converter 211, and the weighing scale are used as the constituent elements. RS232C cable (91), RS232C cable (93) and RS422 cable (92) used for connection of PC 230, data recording software supplied by PC 230, and the like. Regarding the structure of the device of the impedance measuring instrument main body 210 here, it is desirable that the design of a) drip-proof, b) vibration / shock resistance, and c) salt water be sufficiently taken into consideration.

FIG. 10 is a front view (1) and a bottom view (2), which are external views of the impedance measuring instrument main body 210, and an AC power switch (a: not shown), a numeric keypad (b), a reset as its operation unit. A switch (c), a measurement start switch (d: not shown), and the like are provided, and four connectors for electrodes / PC / weight / AC are provided as connection connectors.
Among these operation units, the AC power switch (a) is a power switch for turning on / off the AC input, and the numeric keypad (b) is “0” to “9” as shown in FIG. , “C” (CLEAR) and “E” (ENTER) keys are used to input a sample identification number consisting of a 4-digit number.

In addition, the reset switch “RESET” (c) of those operation units enables re-measurement by pressing this switch when the measured value displayed on the LED is an unexpected value. It is a key to do. A measurement start switch (not shown) is a key attached to the measurement electrode, and can be started by pressing this switch.
Furthermore, in the measurement, for example, when it is decided to measure in the order of “back kami” → “back naka” → “back shimo” → “abdominal kami” → “abdominal naka” → “abdominal shimo” Care must be taken not to make a mistake in the order.

The impedance measuring device main body 210 is provided with LED display portions (1, 2, 3, 4, 5, 6) at a plurality of locations, which are a power on / off display LED (1) and a status display. It consists of LED (2-4), measurement site display LED (5), 7 segment LED (6), and the like.
Of these LED display units, the power on / off display LED (1) is, for example, lit in green when the power is turned on and turned off when the power is turned off. The status display LEDs (2 to 4) are classified into three types, “PC (2)”, “Weigh scale (3)”, and “Electrode (4)”. The connection state is displayed. For example, when each of these is not connected, it is preferable to light red, and when connected, green.

  The measurement site display LED (5) is shown on the surface of the measuring instrument main body 210, specifically on the surface of the measuring instrument 210, "Back Kami (5a)", "Back Naka (5b)", "Back Shimo (5c)" , “Abdominal kami (5d)”, “abdominal naka (5e)”, and “abdominal shimo (5f)”, LEDs are arranged respectively. For example, in each of the six LEDs, an unmeasured portion may blink green and light green when the measurement is completed. And 7 segment LED (6) is good to be used, for example for displaying the identification number of a sample, a measured value, etc.

Next, an operation procedure of the impedance measurement system 200 will be described.
1. PC (230)
(1-1) Check the AC adapter connection and turn on the power.
(1-2) Start the installed impedance measurement data input program.
2. Impedance measuring instrument body (210)
(2-1) Check the connection of the power cable, RS422 cable, RS232C cable and electrode cable, and turn on the power.
<Operation of measuring instrument>
The connection of the RS422 cable, the RS232C cable, and the electrode cable is confirmed. When not connected, the corresponding LED ("PC", "Weigh scale", "Electrode") is lit red, and subsequent operations are not accepted. At the time of connection, after the LED is lit in green, input of the sample identification number is awaited.

(2-2) Enter the identification number displayed on the bamboo skewer and press the “ENTER” key.
<Operation of measuring instrument>
The LED of “Back” flashes green.
(2-3) First, stab the electrode into the “back lip” and press the push switch attached to the electrode. Check the measured value displayed on the LED, and if it is an unexpected value, press the “RESET” switch to remeasure.
<Operation of measuring instrument>
The measured impedance is stored, the corresponding LED is lit in green, and the LED at the next site to be measured blinks in green.

(2-4) Repeat steps (2-3) in the order of “back kami”, “back naka”, “back peach”, “abdominal kami”, “abdominal naka”, “abdominal imo”, Measure all.
When it is confirmed that all six LEDs are lit in green, the measurement of one sample is completed.
<Operation of measuring instrument>
The measured impedance is transferred to the host computer, and the sample identification number input wait state is resumed.
<PC operation>
The transferred measurement data is processed as necessary and saved as a CSV file, and the data list and graph are displayed by the EXCEL program.

Next, each component of the impedance measurement system 200 will be supplementarily described with reference to FIGS. 9 and 10.
(1) Measuring instrument body 210
The external view of the measuring instrument main body 210 of the impedance measurement system 200 is as shown in FIG. 10, but if a specific example is given about the dimension, it can be set to horizontal: 320 mm, vertical: 180 mm, and thickness: 80 mm. Further, it is preferable to reduce the weight of the entire mass to 5 kg or less. Furthermore, it is practical that the measuring instrument main body 210 is installed in a wall-hanging manner, and in order to achieve this method, it is preferable to provide the measuring instrument main body 280 with mounting holes for hanging on the wall.

(2) Electrode 220
It shall have a shape and strength capable of penetrating the shark skin.
(3) Electrode cable 94
The dimension (length) is preferably about 5 m, for example, and an 8-core waterproof round multipolar connector is preferably used as the connection connector.
(4) Power cable 95
It is recommended to use a connector on the switchboard or outlet side to make the dimensions easy to use. Moreover, it is good to use a 3-core waterproof round multipolar connector on the measuring instrument main body side.

(5) RS422 cable 92
The dimensions are easy to use. The connector on the measuring instrument main body side is preferably a 5-core waterproof round multipolar connector, and the PC side is preferably Dsub.
(6) RS422 / RS232C converter (without power supply)
It should be installed in the chart room.
(7) RS232C cable (1) 91 (for weighing scale)
It is recommended to use a waterproof round multipolar connector having a dimension of about 5 m and 6 cores.
(8) RS232C cable (2) 93 (for PC)
A commercially available product may be used, and the size may be about 1 m.

  According to the fish meat quality judgment system according to the present invention, the quality of fishery products represented by high-class fish such as tuna and skipjack can be judged easily and quickly, and even fishery products such as tuna just caught on a fishing boat can be used on fishing boats. The quality of fish meat can be determined easily and accurately by using the short time before frozen storage above. Speaking only of tuna, Japanese tuna ships have already counted 550, and it is expected that the number of tuna captured will continue to grow, and the application of the fish flesh judgment system according to the present invention is highly expected. Will be.

It is a block diagram of the whole fish body quality determination system by this invention. It is a figure which shows the structure of the electrode part 22 of the impedance measurement circuit 70 and the probe for a measurement used for the fish flesh quality judgment system by this invention. In the fish flesh quality judgment system by this invention, it is a figure which expands and shows in detail the structure of the electrode part 22 for a measurement. It is a figure for demonstrating the flesh quality about the tuna (bream) which measures the impedance in the fish flesh quality judging system by the present invention. It is a figure for showing the individual data of three bodies of the tuna (carp) which measures the impedance in the measurement experiment of the fish flesh quality judging system by the present invention. It is a figure for demonstrating the data obtained by impedance (1) and (2) in the measurement experiment of the fish flesh judgment system by this invention. It is a figure for demonstrating the data obtained by impedance (3)-(6) in the measurement experiment of the fish flesh judgment system by this invention. It is a figure for demonstrating the data obtained by impedance (7)-(9) in the measurement experiment of the fish meat quality determination system by this invention. It is a block diagram which shows the structure of the impedance measurement system 200 by this invention. It is an external view of the measuring device main body 210 of the impedance measurement system 200 by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Fish body discrimination | determination system 10 Measuring instrument main body 11 Display part 12 Numeric keypad part 13 Input part 20 Measuring probe 21 Grip part 21 'Grip tip 22 Electrode part a1, a2, b1, b2 Electrode 30 Computer 40 Electronic scale 61, 62, 63 Wireless or wired connection means 70 Impedance measurement circuit 200 Impedance measurement system 210 Measuring instrument body 220 Electrode 230 PC (PC)
240 Weigh scale

Claims (6)

A system for measuring the impedance of a meat part of a fish body and judging its quality,
An impedance measuring means for dividing the fish into a plurality of predetermined parts and measuring the impedance of each part;
A database for acquiring and accumulating fish flesh information including individual data for each fish and data on measured impedance for each part of the fish;
From the measured impedance value and the database, a fish meat quality evaluation judging means for evaluating and judging the meat quality of each part of the fish body,
A fish meat quality determination system characterized by comprising: In the fish body quality determination system according to claim 1,
The fish flesh quality judging system characterized in that the individual data for each fish body includes at least one data of fish type / weight / girth circumference / volume / body length. In the fish body quality determination system according to claim 1,
The fish meat quality judging system characterized in that the data relating to the impedance includes data of a site or position where the impedance is measured, and distance data of the measurement electrode end from the fish body surface. In the fish flesh judgment system in any one of Claims 1-3,
The fish body is a tuna, and includes 6 parts of back shark / back naka / back shimo / abdominal kami / abdominal naka / abdominal shimo / as the parts where the impedance is measured. Judgment system. In the fish meat quality determination system according to any one of claims 1 to 4,
The database comprises data for evaluation criteria set for meat quality evaluation determination,
A fish meat quality determination system characterized in that a measurer can reset the evaluation reference data according to measurement. In the fish meat quality determination system according to any one of claims 1 to 4,
The storage means stores the individual information including at least one of measured individual data, date and time data when the individual was captured or measured, temperature data, and position data,
A fish meat quality judgment system characterized by attaching or embedding this storage means to an individual.

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