JP2019100906A - Fat condition measurement device - Google Patents

Abstract

To provide a fat condition measurement device capable of easily measuring condition of fat with enhanced accuracy.SOLUTION: A fat condition measurement device 1 measures condition of fat. The fat condition measurement device 1 includes a measurement unit 30 configured to measure oxidation of fat on the basis of brightness of light in the visible region transmitting through the fat.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fat and oil state measuring device that measures the state of fat and oil.

  When the fats and oils contained in the food are degraded, problems such as changes in taste and an offensive odor occur, so that the fats and oils contained in the food or the fats and oils used for processing the food are provided with a standard. . The state in which the fats and oils for food have deteriorated is a state in which oxygen is bound to the fatty acids contained in the fats and oils, that is, a state in which the amount of free fatty acids is increased due to the decomposition of the fats and oils. Among these, what shows the quantity of the free fatty acid per unit quantity of foodstuffs is "acid value", and is used as one of the measurement items in the above-mentioned standard used for foodstuffs.

  The acid value is defined by the standard such as JIS-K 0070 as an amount (mg) of potassium hydroxide value (mg) used to neutralize free fatty acid, resin acid and the like contained in 1 g of the sample. In order to accurately know the acid value, measurement methods such as neutralization titration and potentiometric titration are used.

  However, in order to manage the state of edible fats and oils on a daily basis, it is not realistic to measure the acid value by a measuring method in a kitchen or the like. Then, the measuring method using a test paper has prevailed as a method which can measure an acid value easily. This test paper is a filter paper impregnated with an indicator or the like. In the measurement method using the test paper, the user adheres the edible oil to the test paper to change the color of the test paper, and the color after the change is compared with the color sample associated with the acid value to compare the acid value of the food oil. Determine the value of

  As another method, the user compares the edible oil and fat in the container with the colored member with a color serving as a reference for determining the degree of deterioration through a colorimetric mask having two openings, A method of determining the degree of deterioration has also been proposed (see, for example, Patent Document 1).

Registered Utility Model No. 3196157

  However, while the measurement method using the test paper and the colorimetric mask described above has the advantage that it can be easily measured, it is a sensory test in which the user determines the color of the edible oil and fat in the test paper and the container with the naked eye . In addition, a user who is skilled in measurement does not necessarily measure the acid value. For this reason, the accuracy of the acid value obtained through the measurement method is not necessarily high, and there is a problem that variations occur among the measuring users. That is, when the color of the edible oil and fat in the test paper and the container does not match any of the plurality of color samples, it is determined which combination of color samples the color to be measured becomes the intermediate color of the combination It can only be estimated that the value between the sample acid numbers is the acid number of the edible fat to be measured. In addition, there are individual differences in how colors are displayed, and the appearance of colors may differ depending on the measurement environment. Therefore, even if the colors of the test paper and the edible oil and fat are the same, a plurality of users or the measurement environment Judgment results may differ depending on the difference. In addition, such a subject is generally common also when measuring the acid value of fats and oils used not only for edible fats and oils but lubricating oil etc. in other uses.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a fat and oil state measuring device capable of easily measuring the state of fat and oil and improving the accuracy thereof. It is in.

  The fat and oil state measuring device which solves the above-mentioned subject is a fat and oil state measuring device which measures the state of fats and oils, and is an acid value which measures the acid value of the fats and oils based on the lightness of the light of visible light which penetrated the fats and oils. The measuring unit is provided.

  The present inventors have determined between the acid value of fat and oil and the R value (red component of RGB color model), the G value (green component of RGB color model), and the B value (blue component of RGB color model) of fat and oil color. Was found to be correlated. According to the above configuration, the acid value of the fat or oil is measured by transmitting visible light into the fat or oil, so it can be easily measured as compared with the conventional titration method for determining the acid value. In addition, because the acid number is measured by the acid number measurement unit based on the brightness of transmitted light, accuracy can be enhanced and variations among the measurement persons can be suppressed as compared to the measurement of the acid number using test paper. It is possible to obtain objective information on the acid value of fats and oils. Furthermore, since visible light is used, it is difficult to attenuate as compared with the case of using a higher wavelength, so it can be made more resistant to disturbances. The lightness is not limited to √ (R ^ 2 + G ^ 2 + B ^ 2) but can be obtained from any two of R value, G value and B value, √ (R ^ 2 + G ^ 2), √ (R ^ It also includes 2 + B ^ 2) and √ (G ^ 2 + B ^ 2), and further includes each value of R value, G value, and B value.

It is preferable that the said acid value measurement part is provided with the memory | storage part which memorize | stores the table which defined the correspondence of the said brightness and the said acid value about the said fat-and-oils state measuring apparatus.
According to the above configuration, the acid value corresponding to the lightness can be obtained based on the table.

  In the fat and oil state measuring device, the table includes a first table and a second table in which the correspondence between the lightness and the acid value is different from the first table, and the acid value measuring unit It is preferable to switch between the first table and the second table in accordance with the use environment of fats and oils.

  The fats and oils differ in the lightness with respect to the same acid value, for example according to the foodstuffs which fry-cook. Therefore, according to the above configuration, accurate measurement can be performed by switching the table according to the use environment of fats and oils, such as food to be fried and cooked.

  In the fat and oil state measuring device, the table is a table having a width in the acid value corresponding to the lightness, and the acid value measurement unit changes the acid value corresponding to the lightness according to the use environment of the fat and oil It is preferable to do.

According to the above configuration, it is possible to change the acid value to be measured according to the use environment of fats and oils, such as food to be fried and cooked.
It is preferable that the said acid value measurement part converts the acid value of the measured said fats and oils into a voltage value, and it outputs it about the said fat-and-oils state measuring apparatus.

  According to the above configuration, the device to which the voltage value is input from the measurement unit does not have to convert the information of the acid value into the operation information, and can operate according to the voltage value input from the measurement unit. Become.

  ADVANTAGE OF THE INVENTION According to this invention, the state of fats and oils can be measured simply, and the precision can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows schematic structure of 1st Embodiment of a fat-and-oil state measuring apparatus. The figure which shows the installation state with respect to the fryer of the fats-and-oils measuring device of the embodiment. The graph which shows the relation between the acid value and the intensity of light in the oil-fats measuring device of the embodiment. The graph which shows the correlation information which the oil-fat-state measurement apparatus of the embodiment uses. The graph which shows the modification of the correlation information which a fat-and-oils state measuring device uses.

  One embodiment of the fat and oil state measuring device will be described with reference to FIGS. 1 to 4. The fat and oil state measuring device of the present embodiment is a device for measuring the acid value of edible fat and oil. Edible fats and oils are stored in a fryer, which is a frying cooker for frying food, and are heated and used, and deterioration is advanced by repeating frying food.

As shown in FIG. 1, the fat and oil state measurement device 1 includes a detection sensor 10 and a measurement unit 30 electrically connected to the detection sensor 10.
The detection sensor 10 includes a sensor body 11, a detection unit 20, and a pair of first pipes 25 and a second pipe 26 which connect the sensor body 11 and the detection unit 20. The sensor main body 11 includes a holder 15 and a cover 19 that covers the upper portion of the holder 15. The holder 15 and the cover 19 are made of metal such as aluminum alloy or resin. A pipe fixing portion 16 for fixing the base ends of the first pipe 25 and the second pipe 26 is fixed to a lower portion of the holder 15 by a bolt. The first pipe 25 and the second pipe 26 may be fixed by welding, or by providing an external or internal thread at the base end of the first pipe 25 and the second pipe 26 and fastening it to the pipe fixing portion 16. Good. Further, the proximal ends of the first pipe 25 and the second pipe 26 may be directly fixed to the sensor main body 11.

  The ends of the first pipe 25 and the second pipe 26 are fitted in the detection unit 20. The detection method of the detection unit 20 and the tips of the first pipe 25 and the second pipe 26 may be welding, or fastening with an external thread or an internal thread. In the detection unit 20, a first communication passage 27 bent at 90 ° communicating with the first pipe 25 is formed, and a second communication passage 28 bent at 90 ° communicating with the second pipe 26 is formed. . A first prism 21 is provided at a bent portion of the first communication path 27 so as to change the optical path by 90 °. A second prism 22 is provided at a bent portion of the second communication passage 28 so as to change the optical path by 90 °. At the center of the detection unit 20, a gap 17 is formed. In the detection unit 20, the first optical window 23 and the second optical window 24 are provided in a sealed manner with the gap 17 interposed therebetween.

  The holder 15 includes a first accommodating portion 11 a. The first housing portion 11 a is covered by a cover 19. The circuit board 12 is accommodated in a space defined by the holder 15 and the cover 19. The circuit board 12 is fixed to the holder 15 side by bolts 11 c. One light emitting unit 13 and one or more light receiving units 14 are mounted on the bottom surface of the circuit board 12.

  The light emitting unit 13 is a light source that emits light in the white visible light range, and is configured of a white LED or the like. The light emitting unit 13 is fixed to the circuit board 12 in a direction in which light can be emitted to the first prism 21. Each light receiving unit 14 is a sensor that detects the intensity of light for each color component such as R (red), G (green), and B (blue), and includes a photodiode and a color filter. Each light receiving unit 14 is fixed at a position where it can receive light emitted from the second prism 22 side.

  The holder 15 is penetrated by a first passage hole 11 d through which the light emitted from the light emitting unit 13 passes. A first pipe 25 is provided at an end of the first passage hole 11d opposite to the end on the light emitting unit 13 side. Further, in the holder 15, a second passage hole 11 e which passes through the detection unit 20 and through which the light reflected by the first prism 21 and the second prism 22 passes after passing through the second pipe 26 penetrates. The light receiving unit 14 is attached at a position where it can receive the light having passed through the second passage hole 11 e. A second pipe 26 is provided at an end of the second passage hole 11 e opposite to the end on the light receiving unit 14 side. That is, the light emitted from the light emitting unit 13 is transmitted through the first passage hole 11 d, the first pipe 25, the first communication passage 27 (the first prism 21), the first optical window 23, the gap 17, the second optical window 24, and the second light window 24. The light passes through the second communication passage 28 (second prism 22) → the second pipe 26 → the second passage hole 11e to reach the light receiving unit 14.

  Further, on the top surface of the circuit board 12, a signal / power supply line 18 in which signal lines and power supply lines are bundled is connected. The light intensity of each color component detected by each light receiving unit 14 is converted into a voltage signal or the like by, for example, a conversion circuit provided on the circuit board 12 and transmitted to the measurement unit 30 via the signal / power supply line 18.

  The measuring unit 30 includes a computing unit, a volatile storage unit, and a non-volatile storage unit, and executes various programs by executing a program stored in the non-volatile storage unit using a detection signal input from the detection sensor 10. Do. The measurement unit 30 corresponds to an acid value measurement unit.

  The measurement unit 30 indicates an R value indicating the intensity of R (red) of the transmitted light, a G value indicating the intensity of G (green), and an intensity of B (blue) according to the detection signal input from the detection sensor 10 Calculate the B value. The measuring unit 30 also calculates the lightness ΔE based on the R value, the G value, and the B value.

  The lightness ΔE can be obtained by the following equation (1). Note that "R" indicates an R value, "G" indicates a G value, and "B" indicates a B value. Further, the lightness ΔE may be measured directly by a sensor capable of measuring the lightness regardless of the equation (1).

測定部３０は、明度ΔＥと酸価との関係を示す相関情報を不揮発性記憶部に記録している。測定部３０は、相関情報を用いて、算出した明度ΔＥに応じた酸価を求める。そして、測定部３０は、求めた酸価を出力する。

The measurement unit 30 records correlation information indicating the relationship between the lightness ΔE and the acid value in the non-volatile storage unit. The measuring unit 30 uses the correlation information to obtain an acid value corresponding to the calculated lightness ΔE. And the measurement part 30 outputs the calculated | required acid value.

  Moreover, the fat and oil state measurement device 1 includes a display unit 31. The display unit 31 displays the acid value input from the measurement unit 30 numerically, for example, "1.0". The user compares the numerical value displayed on the display unit 31 with a reference value used as a reference for deterioration to determine whether it is necessary to replace or add edible fats and oils. Display part 31 may urge exchange of edible fats and oils when the acid value exceeds a standard value.

  As shown in FIG. 2, the detection sensor 10 is attached to the fryer 40. The fryer 40 includes an oil tank 41 that stores edible fats and oils. Inside the oil tank 41, a heating unit 42 for heating the edible fat and oil stored in the oil tank 41 is provided. The heating unit 42 may be any of an electric type, a gas type, and the like.

  At the lower part of the oil tank 41, a discharge path 43 for discharging the edible oil and fat in the oil tank 41 is connected. The tip of the discharge passage 43 is opened in a container 45 for collecting the discharged edible oil and fat. An open / close valve 44 is attached to the discharge passage 43. The on-off valve 44 enables the edible oil and fat to pass through the discharge passage 43 by opening the valve 44 and prevents the edible oil and fat from passing through the discharge passage 43 by closing the open / close valve 44. The on-off valve 44 is, for example, a butterfly valve or a solenoid valve.

  The detection sensor 10 is attached to the oil tank 41 of the fryer 40. That is, the gap 17 which is a measurement chamber of the detection sensor 10 is provided in the oil tank 41, and is immersed in the stored edible oil and fat. Preferably, a moving mechanism (not shown) for moving the detection sensor 10 as indicated by an arrow is provided. The detection sensor 10 corresponds to the heating temperature of the edible fat and oil of the oil tank 41.

The correlation information will be described with reference to FIGS. 3 and 4.
In the graph shown in FIG. 3, the abscissa represents the acid value, and the ordinate represents the light intensity, that is, the R value, the G value, and the B value. The R value, the G value, and the B value all decrease as the acid value increases. Among the R value, the G value, and the B value, the B value decreases most greatly as the acid value increases. In addition, among the R value, the G value, and the B value, the R value has the smallest decrease with the increase of the acid value.

  The horizontal axis of the graph shown in FIG. 4 is the lightness ΔE, and the vertical axis is the acid value. Line A shows the change in lightness ΔE and acid value when the food to be added to the edible oil and fat is meat, and line B shows lightness ΔE and acid value when the food to be added to the edible oil and fat is vegetable A change is shown, and a line C shows a change in lightness ΔE and an acid value when the food to be fed to the edible oil and fat is both meat and vegetables. The non-volatile storage unit of the measurement unit 30 stores data of this graph in the form of a table in which the correspondence between the lightness ΔE and the acid value is defined. This table includes a plurality of tables prepared in advance for each type of edible oil and fat, and for each food. The plurality of tables correspond to the first table and the second table.

Next, the operation of the fat and oil state measuring device 1 will be described.
The user operates the operation unit (not shown) of the measurement unit 30 to select whether the edible oil or fat to be measured is used for meat or vegetables. If the measurement part 30 acquires the foodstuffs information which is object information, it will switch a table according to a foodstuff as a use environment of edible oil and fats.

  The measurement unit 30 causes the gap 17 of the detection sensor 10 to be immersed in the edible fat and oil by the moving mechanism. When acquiring the detection signal from the detection sensor 10, the measurement unit 30 calculates the acid value of the edible oil and fat, and causes the moving mechanism to extract the detection sensor 10 from the edible oil and fat. In addition, the measurement part 30 may measure the acid value of an edible oil and fat regularly, and may measure it at any time. When the user operates to measure the acid value of the edible oil or fat, the measuring unit 30 may measure the acid value of the edible oil or fat.

  Moreover, when the heat-resistant temperature of the detection sensor 10 is lower than the heating temperature of the edible oil and fat of the oil tank 41, it operate | moves as follows. The measurement unit 30 obtains the temperature from the temperature sensor that detects the temperature of the edible oil and fat in the oil tank 41, and checks whether the temperature of the edible oil and fat in the oil tank 41 is lower than the heat-resistant temperature of the detection sensor 10 or not. . If the measurement part 30 confirms that the temperature of the edible oil and fat of the oil tank 41 has fallen below the heat-resistant temperature of the detection sensor 10, it will make the clearance 17 of the detection sensor 10 dip in edible oil and fat by a moving mechanism. When acquiring the detection signal from the detection sensor 10, the measurement unit 30 calculates the acid value of the edible oil and fat, and causes the moving mechanism to extract the detection sensor 10 from the edible oil and fat.

  The user operates the detection sensor 10 to emit white light from the light emitting unit 13. In addition, when irradiating only with a specific combination, such as R value and B value of transmitted light, and G value and B value of transmitted light, light including only red and blue components, and green instead of white LED etc. An LED or the like capable of emitting light containing only a blue component can be used.

  The measuring unit 30 calculates the R value, the G value, and the B value based on the signal input from the light receiving unit 14 and calculates the lightness ΔE. Further, the measurement unit 30 reads the table of the correlation information stored in the non-volatile storage unit, and extracts the information according to the selected food. And the measurement part 30 calculates | requires the acid value corresponding to lightness (DELTA) E based on the table of correlation information. When the acid value is obtained, the measuring unit 30 outputs the acid value to the display unit 31.

As described above, according to the present embodiment, the following effects can be obtained.
(1) Since the acid value of the edible oil and fat is measured by transmitting light in the visible light range into the edible oil and fat, it can be easily measured as compared with the conventional titration method for determining the acid value. . In addition, since the acid number is measured by the measurement unit 30 based on the brightness of the transmitted light, accuracy can be enhanced and variations occurring among the measurement persons can be suppressed as compared to the measurement of the acid number using test paper. It is possible to obtain objective information on the acid value of edible fats and oils. Furthermore, since visible light is used, it is difficult to attenuate as compared with the case of using a higher wavelength, so it can be made more resistant to disturbances.

(2) The acid value corresponding to the lightness can be determined based on a table in which the correspondence relationship between the lightness ΔE and the acid value is defined.
(3) Accurate measurement can be performed by switching the table according to the use environment of fats and oils, such as foods to be fried and cooked.

In addition, the said embodiment can also be implemented with the following forms which changed this suitably.
-In the said embodiment, several tables from which the correspondence of a brightness and an acid value differs are used. However, as shown in FIG. 5, the measuring unit 30 may change the acid value corresponding to the lightness according to the use environment of the fat and oil, using a table having a range of the acid value corresponding to the lightness. For example, the initial value is the acid value corresponding to the lightness is set to the value of the solid line, when cooking only vegetables, the acid value corresponding to the lightness is changed to the lower limit shown by the dashed dotted line When cooking only fried food, the acid value corresponding to the lightness is changed to the upper limit indicated by a broken line. According to such a configuration, it is possible to change the acid value to be measured according to the use environment of the oil and fat, such as food to be fried and cooked.

  In the above embodiment, ΔE obtained by the equation (1) is adopted as the lightness, but the lightness is not limited to √ (R ^ 2 + G ^ 2 + B ^ 2), and any of R value, G value and B value Alternatively, R (R ^ 2 + G ^ 2), √ (R ^ 2 + B ^ 2), and √ (G ^ 2 + B ^ 2) obtained from two or more may be adopted, and further, R value, G value, B value Each value of may be adopted. With any of these lightnesses, as shown in FIG. 3, the strength decreases as the acid value increases, so the state of the oil can be easily measured, and its accuracy can be improved. .

  In the above embodiment, the light receiving unit 14 is a sensor that detects the intensity of light for each color component such as R (red), G (green), and B (blue). It is good also as a sensor which detects only a required color component among color components of G (green) and B (blue).

  -In the said embodiment, the display part 31 displayed the acid value by the numerical value. As another mode, the user may output identifiably whether the acid value is less than the reference value or greater than or equal to the reference value. For example, a lamp that emits blue light is turned on when the measured acid value is less than a preset reference value, and a lamp that emits red light is turned on when the measured acid value is greater than or equal to the reference value. It is also good. Alternatively, whether or not the measured acid value is less than the reference value may be displayed on the display unit 31 so as to be distinguishable by a mark. Alternatively, it may indicate whether the measured acid value is less than the reference value by means of voice, sound, vibration or any other method that can be identified by the user.

  In the above embodiment, although the measurement result of the measurement unit 30 is output to the display unit 31, the measurement result of the measurement unit 30 is output to the control device of the flyer 40, and the measurement result of the measurement unit 30 is controlled to the flyer 40. You may use. The measuring unit 30 may convert the acid value into a voltage value and output the voltage value to the control device of the fryer 40. In this way, the control device of the fryer 40 can be operated according to the voltage value.

  In the above embodiment, the fat and oil state measurement device 1 may acquire information from the fryer 40 and change the table based on the frying condition (temperature, time, etc.) of the fryer. For example, it can be roughly divided into fried meat at 170 ° C and fried vegetables at 180 ° C. Therefore, when the number of frying at 170 ° C is large, it is judged that frying of meat is frequent, and measurement according to the usage environment for frying meat It is also possible.

  In the above embodiment, the fat and oil state measurement device 1 may obtain POS (Point of Sales system) information and change the table based on the POS information. For example, if it is determined that the amount of meat ordered is large based on the order information, it can be determined that the amount of meat will be fried next time, so it is possible to measure according to the usage environment in which the meat is fried.

  In the above embodiment, the detection sensor 10 is configured such that the first prism 21 and the second prism 22 are disposed with the gap 17 therebetween, and the light emitted from the light emitting unit 13 passes through the gap 17 and is received by the light receiving unit 14. In the above, the detection sensor 10 is not limited to this configuration. For example, edible fat and oil may be put in a cell made of quartz glass or the like, light emitted from the light emitting unit 13 may be transmitted to the cell, and transmitted light may be received by the light receiving unit 14. Also in this case, the state of fat can be easily measured, and the accuracy can be improved.

  In the above embodiment, although the detection sensor 10 and the measurement unit 30 are separate members, the measurement unit 30 may be incorporated in the detection sensor 10. In this way, it is not necessary to connect the detection sensor 10 and the measurement unit 30 with the signal / power supply line 18 or the like, and it is possible to measure the fat and oil state only by the detection sensor 10.

  -Although the object of measurement was used as the edible oil and fat in the above embodiment, other oils and fats may be used. For example, oils and fats such as a lubricating oil of a machine may be an object to be measured.

  DESCRIPTION OF SYMBOLS 1 ... fat-and-oils state measuring apparatus, 10 ... detection sensor, 11 ... sensor main body, 11a ... 1st accommodating part, 11c ... bolt, 11d ... 1st passage hole, 11e ... 2nd passage hole, 12 ... circuit board, 13 ... light emission Parts 14 light receiving part 15 holder 16 pipe fixing part 17 gap 18 signal / power wire 19 cover 20 detection part 21 first prism 22 second prism 23 ... 1st optical window, 24 ... 2nd optical window, 25 ... 1st pipe, 26 ... 2nd pipe, 27 ... 1st communicating path, 28 ... 2nd communicating path, 30 ... measuring part, 31 ... display part, 40 ... Fryer, 41 ... oil tank, 42 ... heating part, 43 ... discharge path, 44 ... on-off valve, 45 ... container.

Claims (5)

It is a fat and oil state measuring device that measures the state of fat and oil,
A fat and oil state measuring device comprising: an acid value measurement unit that measures an acid value of the fat and oil based on lightness of light in a visible light range transmitted through the fat and oil. The fat and oil state measurement device according to claim 1, wherein the acid value measurement unit includes a storage unit that stores a table in which a correspondence between the lightness and the acid value is defined. The table includes a first table, and a second table in which the correspondence between the lightness and the acid value is different from the first table.
The fat and oil state measurement device according to claim 2, wherein the acid value measurement unit switches between the first table and the second table according to a use environment of fat and oil. The table is a table having a width in the acid value corresponding to the lightness,
The fat and oil state measuring device according to claim 2, wherein the acid value measurement unit changes an acid value corresponding to the lightness according to a use environment of the fat and oil. The fat and oil state measurement device according to any one of claims 1 to 4, wherein the acid value measurement unit converts the measured acid value of the fat and oil into a voltage value and outputs the voltage value.

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