JP2001272368A - Method and device for determining liquid sort - Google Patents

Abstract

PROBLEM TO BE SOLVED: To immediately and surely determine a liquid sort inside a container from the outside of the container. SOLUTION: Liquid 14 is stored in a non-conductive container 15, and a pair of electrodes 16, 17 are arranged with at least a part of the liquid 14 put between them. A first measurement apparatus is electrically connected to a pair of electrodes 16, 17. The first measurement apparatus impresses a high-frequency voltage between a pair of electrodes 16, 17 and measures an electrostatic characteristic varied for each sort of the liquid 14. The liquid 14 is drinking water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for storing a plurality of types of liquids in containers having similar appearances and discriminating these liquids from outside the containers.

[0002]

2. Description of the Related Art Conventionally, as a discrimination method of this kind, there are a method in which a person discriminates by looking at a display attached to a container, and a method in which a bar code or the like attached to a container is electrically read and discriminated. Etc. are known.

[0003]

However, for example, kerosene and gasoline are sold in the same distribution network, and if gasoline is mistaken for kerosene in a container, it may cause a serious disaster. In addition, if an alcoholic beverage is mistaken for a non-alcoholic beverage, it may lead to an accident involving human life. Although it is necessary to completely eliminate these mistakes, it is not possible to completely eliminate mistakes caused by mistakes by the method of judging by looking at the label attached to the container. Also, even a method of electrically reading a bar code cannot completely prevent a wrong liquid from being put into a container. On the other hand, a printing machine that changes the color of the ink and prints, and a painting robot that changes the color of the paint to paint, etc.
There is a possibility that inks and paints of different colors may be set by mistake, and it is troublesome to check the display of the types of inks and paints by looking inside the printing press or the painting robot, and there is a problem that the workability is reduced. An object of the present invention is to provide a method for determining the type of liquid and a device for determining the type of liquid, which can instantaneously and reliably determine the type of liquid in the container from outside the container.

[0004]

The invention according to claim 1 is
As shown in FIGS. 1 and 2, a pair of electrodes 16 and 17 are arranged so as to sandwich at least a part of the liquid 14 stored in a non-conductive container 15, and a high-frequency voltage is applied between the pair of electrodes 16 and 17. Is a method of determining the type of liquid by measuring electrostatic characteristics by applying a voltage. In the method for determining the type of liquid according to the first aspect, the capacitor 19 is constituted by the pair of electrodes 16 and 17 and the liquid 14 sandwiched between the electrodes 16 and 17. Can be measured by applying a high frequency voltage of a predetermined frequency to the pair of electrodes 16 and 17,
Depends on the type of As a result, the type of the liquid 14 stored in the container 15 can be reliably and instantaneously determined from outside the container 15.

According to a second aspect of the present invention, as shown in FIGS. 3 to 5, a pair of electrodes 16 and 17 are arranged so as to sandwich at least a part of a liquid 34 stored in a non-conductive container 35. When the first coil 51 is electrically connected to the pair of electrodes 16 and 17, and the high-frequency voltage is applied to the exciting coil 47 facing the first coil 51, the value of the current flowing through the exciting coil 47 and the high-frequency This is a method of determining the type of liquid by measuring the phase delay with respect to the voltage. According to the liquid type discrimination method described in claim 2, when a high frequency voltage is applied to the excitation coil 47, the excitation coil 47
The high frequency current flows through the first coil 51 by the mutual induction between the first coil 51 and the first coil 51, and the value of the current flowing through the exciting coil 47 and the phase delay of this current depend on the type of the liquid 34 (the difference in the dielectric constant of the liquid 34). Is determined to be substantially constant.
As a result, the type of the liquid 34 can be determined by detecting the value of the current flowing through the exciting coil 47 and the phase delay of the current.

According to a third aspect of the present invention, as shown in FIG. 7, a pair of electrodes 16 and 17 are arranged so as to sandwich at least a part of a liquid stored in a non-conductive container. , 17 are connected in series with first and second coils 71, 72, and an excitation coil 47 and a detection coil 78 are provided to face the first and second coils 71, 72, respectively, and a high-frequency voltage is applied to the excitation coil 47. With the detection coil 7
In this method, the type of the liquid is determined by measuring the voltage generated at 8. In the method for determining the type of liquid according to the third aspect, when a high-frequency voltage is applied to the excitation coil 47, a high-frequency current flows through the first coil 71 due to the mutual induction between the excitation coil 47 and the first coil 71. At the same time, a predetermined voltage is induced in the detection coil 78 by the mutual induction between the second coil 72 and the detection coil 78.
The voltage induced in the detection coil 78 is determined to be substantially constant depending on the type of liquid (different permittivity of liquid). As a result, the type of liquid can be determined by detecting the voltage induced in the detection coil 78.

The invention according to claim 4 is the invention according to claims 1 to 3
The invention according to any one of the above aspects, wherein the liquid is ink or paint, and the type of the solvent or the pigment or the content ratio thereof is changed for each type of the liquid. In the method for determining the type of liquid according to the fourth aspect, it is possible to reliably determine the type of liquid from outside the container without visually recognizing the color of the ink or the paint. The invention according to claim 5 is the invention according to any one of claims 1 to 3, wherein the liquid is drinking water stored in a container. According to the method for determining the type of liquid described in the fifth aspect, it is possible to reliably determine whether or not the liquid contains alcohol or whether or not the liquid is rotten from the outside of the container.

According to a sixth aspect of the present invention, as shown in FIGS. 1 and 2, a pair of electrodes 1 arranged so as to sandwich at least a part of a liquid 14 stored in a non-conductive container 15 is provided.
The liquid type discriminating apparatus includes a first measuring instrument 11 for applying a high-frequency voltage between a pair of electrodes 16 and 17 and measuring different electrostatic characteristics for each type of liquid 14. In the liquid type discriminating apparatus according to the sixth aspect, the capacitor 19 is constituted by the pair of electrodes 16 and 17 and the liquid 14 sandwiched between the electrodes 16 and 17, and the electrostatic characteristics of the capacitor 19. Can be measured by the first measuring device 11 applying a high frequency voltage of a predetermined frequency to the pair of electrodes 16 and 17, and differs depending on the type of the liquid 14. As a result, the type of the liquid 14 stored in the container 15 can be reliably and instantaneously determined from outside the container 15.

According to a seventh aspect of the present invention, as shown in FIGS. 3 to 5, a pair of electrodes 16, which are arranged so as to sandwich at least a part of a liquid 34 stored in a non-conductive container 35,
17, a first coil 51 electrically connected to the pair of electrodes 16, 17, an exciting coil 47 provided opposite to the first coil 51, and a high-frequency voltage applied to the exciting coil 47 and the exciting coil A liquid type discriminating device comprising: a second measuring device 32 for measuring a current value that differs for each type of liquid 34 generated at 47 and a phase delay of the current with respect to a high-frequency voltage. In the liquid type discriminating apparatus according to the seventh aspect, when the second measuring device 32 applies a high frequency voltage to the exciting coil 47, the first coil 51 is activated by the mutual induction between the exciting coil 47 and the first coil 51. As the high-frequency current flows through 51, the value of the current flowing through the exciting coil 47 and the phase delay of this current are determined to be substantially constant depending on the type of the liquid 34 (difference in the dielectric constant of the liquid 34). As a result, the type of the liquid 34 can be determined by detecting the value of the current flowing through the exciting coil 47 and the phase delay of the current by the second measuring device 32. Although it is necessary to provide the pair of electrodes 16 and 17 and the first coil 51 for each container 35, since the pair of electrodes 16 and 17 is provided inside the container 35, the gap between the liquid 34 and the pair of electrodes 16 and 17 is reduced. Can be smaller. As a result, the type of the liquid 34 can be accurately determined.

According to an eighth aspect of the present invention, as shown in FIG. 7, a pair of electrodes 16, 17 arranged so as to sandwich at least a part of a liquid stored in a non-conductive container, and a pair of electrodes The first and second coils 71 and 72 connected in series to the first and second coils 16 and 17, the excitation coil 47 and the detection coil 78 provided to face the first and second coils 71 and 72, respectively, and the excitation coil 47. The liquid type discriminating device includes a third measuring device 73 that applies a high-frequency voltage and measures a different voltage for each type of liquid generated in the detection coil 78. In the liquid type discriminating apparatus according to the eighth aspect, when the third measuring device 73 applies a high-frequency voltage to the exciting coil 47, the first coil 71 is activated by the mutual induction between the exciting coil 47 and the first coil 71. A high-frequency current flows through 71, and a predetermined voltage is induced in detection coil 78 by a mutual induction action between second coil 72 and detection coil 78. The voltage induced in the detection coil 78 is determined to be substantially constant depending on the type of liquid (different permittivity of liquid). As a result, the type of liquid can be determined by the third measuring device 73 detecting the voltage induced in the detection coil 78.

The invention according to claim 9 is the invention according to claims 6 to 8
The invention according to any one of the above aspects, wherein the liquid is ink or paint, and the type of the solvent or the pigment or the content ratio thereof is changed for each type of the liquid. In the liquid type discriminating apparatus according to the ninth aspect, the difference in the dielectric constant increases depending on the type of the liquid, so that the type of the liquid can be more reliably determined. The invention according to claim 10 is the invention according to any one of claims 6 to 8, wherein the liquid is drinking water stored in a container. In the liquid type discriminating apparatus according to the tenth aspect, it is possible to reliably determine from the outside of the container whether or not the liquid contains alcohol or whether or not the liquid is spoiled.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2,
The discriminating device 10 of the present invention is a device that discriminates the type of the drinking water 14 (for example, a non-alcoholic beverage and an alcoholic beverage) from the outside while being stored in the container 15. Specifically, the discriminating apparatus 10 includes a pair of electrodes 16 and 17 arranged so as to sandwich a part of the drinking water 14 stored in the container 15 and a first electrode 16 and 17 electrically connected to the electrodes 16 and 17. Measuring instrument 1
1 is provided. The container 15 is preferably formed of a non-conductive material such as plastic or paper. In addition, the first measuring device 11 applies a high-frequency voltage (3 to 3) between the pair of electrodes 16 and 17.
30 MHz) and an impedance analyzer 11 for measuring the electrostatic characteristics of the drinking water 14. In this embodiment, the electrostatic characteristic is the capacitance C of the capacitor 19 composed of the pair of electrodes 16, 17 and the container 15 and the drinking water 14 (dielectric). Reference numeral 18a in FIG. 1 denotes a belt of the conveyor 18 that transports the container 15.

In the discriminating apparatus 10 configured as described above,
The impedance analyzer 11 has a pair of electrodes 16 and 17.
The capacitance C when the container 15 passes between the pair of electrodes 16 and 17 is measured in a state where a high frequency voltage of a predetermined frequency is applied to. Since the capacitance C decreases as the alcohol concentration contained in the drinking water 14 increases, even if the container 15 filled with the alcoholic beverage passes between the pair of electrodes 16 and 17 by mistake, the capacitance C does not change. C becomes equal to or less than a predetermined value, and the container 15 (containing alcoholic beverage) can be instantaneously determined from the outside. Further, in the discriminating apparatus 10, since it is not necessary to attach the pair of electrodes 16 and 17 to the container 15, the manufacturing cost of the container 15 is not increased.

In this embodiment, the non-alcoholic beverage and the alcoholic beverage are discriminated by the discriminating device. However, the discriminating device may discriminate whether or not the drinking water stored in the container is spoiled. . In this case, when the drinking water in the container rots, the sugar content in the drinking water becomes an acid and the dielectric loss of the drinking water increases.Therefore, it is possible to determine whether or not the drinking water has rot by using the determination device. it can. In addition, even when a foreign substance is intentionally mixed into the drinking water to change the quality, the electrostatic characteristics also change. Therefore, it is possible to determine whether or not the foreign substance is mixed in the drinking water using the above-described determination device. here,
The above-mentioned dielectric loss means that the impedance is represented by the formula (r-1 / (ω)
C) r when current flows through the capacitor represented by j)
Loss. The cause of this dielectric loss is the conductor (electrode)
Most of the loss due to the dielectric (a liquid such as alcohol) itself is included. That is, since hysteresis occurs in the dielectric material as well as the hysteresis of the magnetic material, the loss caused by this hysteresis, and the fact that the liquid which is the dielectric material is not a perfect insulator, causes a slight current to flow through the liquid. There is an eddy current loss that occurs.

In this embodiment, the capacitance C of the capacitor constituted by the pair of electrodes, the container, and the liquid (dielectric) is measured as the electrostatic characteristic. Alternatively, together with the capacitance C, the Q value of the resonance circuit including the capacitor (the Q value is a value indicating that the resistance loss of the coil and the capacitor in the high-frequency circuit is small, and is also referred to as a voltage expansion ratio) is measured. You may.

FIGS. 3 to 6 show a second embodiment of the present invention. 3 to 6, the same reference numerals as those in FIGS. 1 and 2 indicate the same parts. In this embodiment, the discriminating device 30 of the present invention is used to discriminate whether or not the ink 34 used in the printing press 41 is a predetermined color ink 34 (FIG. 4). Even if the ink 34 has a different color, the difference in the dielectric constant may be extremely small. Therefore, by changing the type of the solvent or the pigment contained in the ink 34 or the content ratio thereof, the dielectric constant of the ink 34 according to the type of the color is changed. Can be increased. For example, xylene as a solvent,
If methylcyclohexanol, cyclohexane, ethylene glycol, or the like is used, the difference in the dielectric constant of the ink 34 can be increased, that is, the pair of electrodes 16 and 17 can be used.
And a capacitance C of a capacitor 39 composed of a bag 35 a and ink 34 sandwiched between these electrodes 16 and 17.
Can be increased (FIGS. 3 to 5).

The printing press 41 is configured to be able to perform both plate making and stencil printing operations by one unit (FIG. 6). When the user places the document 43 on the document supply section 42 of the printing press 41 and presses the switch, the contents described in the document 43 are thermally perforated on the stencil base paper by the thermal head, and the perforated stencil base paper is printed on the printing drum 44. And pressing another switch, the ink 34 (FIG. 5) is supplied from the inside of the drum 44 to the stencil base paper, and the paper 45 (FIG. 6) is supplied.
The predetermined printing is performed continuously. The ink 34 is a container 35 formed of a non-conductive material.
(FIGS. 3 and 5), and the container 35 is
4 is mounted on a bracket 46 holding the same (FIG. 6). The container 35 has a cardboard box 35b (FIGS. 3, 5, and 6) formed in a rectangular parallelepiped shape by cardboard, and a vinyl chloride bag 35a (FIG. 5) housed in the box 35b.
The ink 34 is stored in a bag 35a. The base of a nozzle 35c protruding from the lower side of the cardboard box 35b is connected to the bag 35a (FIGS. 3 and 6).

One electrode 16 of the pair of electrodes 16 and 17 is attached to the lower part of the inner surface of one side wall 35d of the cardboard box 35b, and the other electrode 17 is attached to the bottom wall 3 of the cardboard box 35b.
It is provided on the upper surface of 5e close to one side wall 35d (FIGS. 3 and 5). Further, the first coil 51 is attached to the inner surface of the other side wall 35f of the cardboard box 35b. A pair of electrodes 16,
17 and the first coil 51 are connected in series, and the capacitor 39 and the first coil 51 constitute a resonance circuit 40.

The printing coil 41 outside the cardboard box 35b is provided with an exciting coil 47 so as to face the first coil 51.
(FIGS. 4 and 6) are provided. The first coil 51 is formed in a square or circular spiral shape having 3 to 20 turns, preferably 5 to 10 turns. The exciting coil 47 is formed in a square or circular spiral or spiral shape having 3 to 20 turns, preferably 5 to 10 turns. Further, the exciting coil 47
Is electrically connected to the second measuring device 32. The second measuring device 32 is a high-frequency power source 32 that generates a voltage of a predetermined frequency.
b and an oscilloscope 32a for measuring a current value that differs for each type of ink 34 and a phase delay of the current with respect to the high-frequency voltage (FIGS. 4 and 6). A resistor 32c (FIG. 4) is connected to the high-frequency power supply 32b, and the oscilloscope 32a is connected in parallel to the high-frequency power supply 32b and the resistor 32c. Since the internal resistance of the oscilloscope 32a is extremely large and almost no current flows through the oscilloscope 32a, the voltage of the high-frequency power supply 32b is displayed on the oscilloscope 32a. That is, the oscilloscope 32a is configured such that a current flowing through the exciting coil 47 is measured by a circuit passing through the resistor 32c, and a voltage applied to the exciting coil 47 is measured by a circuit not passing through the resistor 32c. Further, the resonance circuit 40 has a frequency of the voltage generated by the high-frequency power supply 32b such that the difference between the current value and the phase delay of the current induced in the exciting coil 47 becomes large depending on the type of the ink 34 in the container 35. The frequency is set to a frequency close to the resonance frequency.

The operation of the discriminating device 30 thus configured will be described. When the high-frequency power supply 32b applies a voltage of a predetermined frequency to the exciting coil 47, a high-frequency current flows through the resonance circuit 40 due to the mutual induction between the exciting coil 47 and the first coil 51, and the current value flowing through the exciting coil 47 and The phase delay of this current is determined to be substantially constant depending on the type of the ink 34 (different permittivity of the ink 34). The value of the current flowing through the exciting coil 47 and the phase delay of the current are detected by the oscilloscope 32a. Here, when the ink 34 is not the ink 34 of the predetermined color, the value of the current flowing through the exciting coil 47 and the phase delay of this current are different from the predetermined value. As a result, the printing machine 41
Since it is possible to detect that the color of the ink 34 is abnormal without looking into the inside of the printer, it is possible to prevent an error of printing with the wrong color. Further, in this discriminating device 30, although it is necessary to provide a pair of electrodes 16, 17 and a first coil 51 for each container 35, the pair of electrodes 16, 17 is
5b, the ink 34 and the pair of electrodes 16,
17 can be reduced. As a result, the type of the ink 34 can be accurately determined.

In this embodiment, the pair of electrodes is attached to the inner surface of the cardboard box. However, if the ink is non-conductive, the pair of electrodes is attached to the inner surface of the bag to make direct contact with the ink. Thereby, a more accurate determination can be made.
Further, in this embodiment, the printing ink is used as the liquid, but a coating paint may be used. Also in this case, it is preferable to increase the difference in electrostatic characteristics depending on the type of color by changing the type of solvent or pigment or the content ratio thereof in the same manner as described above.

FIG. 7 shows a third embodiment of the present invention.
7, the same reference numerals as those in FIG. 4 indicate the same parts. In this embodiment, a pair of electrodes 16, 1 are provided on the inner surface of the cardboard box.
7 and a first electrode connected in series to these electrodes 16 and 17.
And second coils 71 and 72, respectively. A capacitor 79 is constituted by a pair of electrodes 16, 17 and a bag and ink sandwiched between the electrodes 16, 17,
The capacitor 79 and the first and second coils 71 and 72 constitute a resonance circuit 80. First and second coils 7
Although not shown, 1, 72 are attached side by side to the inner surface of the side wall of the cardboard box. In the printing machine outside the cardboard box, an excitation coil 47 and a detection coil 78 are provided so as to face the first and second coils 71 and 72, respectively. First and second
The coils 71 and 72 have 3 to 20 turns, preferably 5 turns.
It is formed into a rectangular or circular spiral shape of 10 times. The number of turns of the excitation coil 47 and the detection coil 78 is 3 to 20.
It is formed into a square or circular spiral or spiral, preferably 5 to 10 times. Further, the exciting coil 47 is electrically connected to a high-frequency power supply 32b that generates a voltage of a predetermined frequency, and the detection coil 78 is connected to a voltmeter 73a.
The high frequency power supply 32b and the voltmeter 73a constitute a third measuring device 73. The voltmeter 73a has a detection coil 7
8 and is configured to detect a different voltage for each type of ink. Further, the frequency of the voltage generated by the high-frequency power supply 32b is set such that the voltage induced in the detection coil 78 becomes large depending on the type of ink.
The frequency is set to a frequency close to the frequency at which the resonance circuit 80 resonates. Except for the above, the configuration is the same as that of the second embodiment.

The operation of the discriminating device 70 thus configured will be described. When the high-frequency power supply 32b applies a voltage of a predetermined frequency to the exciting coil 47, a high-frequency current flows through the resonance circuit 80 due to the mutual induction between the exciting coil 47 and the first coil 71. That is, since a high-frequency current also flows through the second coil 72, a voltage of a predetermined frequency is generated by the mutual induction between the second coil 72 and the detection coil 78.
8 The voltage induced in the detection coil 78 is set to a substantially constant value depending on the type of ink (different permittivity of ink), and is detected by the voltmeter 73a. Here, when the ink is not the ink of the predetermined color, the voltage induced in the detection coil 78 indicates a value different from the predetermined value. As a result, it is possible to detect that the color of the ink is abnormal without looking into the inside of the printing press, so that it is possible to prevent an error of printing with the wrong color. Operations other than those described above are substantially the same as those in the second embodiment, and a repeated description thereof will be omitted.

[0024]

Next, embodiments of the present invention will be described in detail. <Example 1> As shown in FIG. 1, a container 15 (material: polyethylene having a thickness of 1 mm) having a length, width and height of 80 mm, 80 mm and 160 mm, respectively, was prepared.
Add 5 liquid 14 (pure water with 0% alcohol concentration) to 5
0 ml was put. The liquid 14 stored in the container 15 was used as Example 1. <Example 2> A mixed solution of pure water and alcohol (alcohol beverage having an alcohol concentration of 6%) in the same container as in Example 1
Was placed in 1000 ml. The liquid stored in this container was used as Example 2.

Example 3 1000 ml of a mixture of pure water and alcohol (alcohol drink having an alcohol concentration of 10%) was placed in the same container as in Example 1. The liquid stored in this container was used as Example 3. <Example 4> 1000 ml of a mixture of pure water and alcohol (alcohol beverage having an alcohol concentration of 15%) was placed in the same container as in Example 1. The liquid stored in this container was used as Example 4. Example 5 In the same container as in Example 1, 1000 ml of a mixed solution of pure water and alcohol (alcohol beverage having an alcohol concentration of 20%) was placed. The liquid stored in this container was used as Example 5.

Example 6 In the same container as in Example 1, 1000 ink (color: black) using xylene as a solvent was used.
Milliliter was put. The ink stored in this container was used as Example 6. <Example 7> In the same container as in Example 1, 10 inks (color: red) using methylcyclohexanol as a solvent were used.
00 ml was put. Example 7 was the ink stored in this container.

Example 8 In the same container as in Example 1, 1 ink (color: blue) using cyclohexane as a solvent was used.
000 ml. Example 8 was the ink stored in this container. Example 9 The same container as in Example 1 was charged with 1,000 ml of an ink (color: yellow) using ethylene glycol as a solvent. Example 9 was the ink stored in this container.

<Comparative Test 1 and Evaluation> As shown in FIG. 1, outside the container 15 of Examples 1 to 5, a predetermined interval (electrode interval is 82 mm) is provided vertically from the container. And a pair of electrodes 1 having a width of 150 mm and a width of 40 mm, respectively.
6, 17 (material: pure copper plate having a thickness of 0.1 mm) were provided. As shown in FIG. 2, an impedance analyzer 11 (HP4191A: manufactured by Yokogawa Hewlett-Packard Company) was connected to the pair of electrodes 16 and 17. In this state, a high-frequency voltage of 1 MHz is applied to the pair of electrodes 16 and 17, and the pair of electrodes 16, 17 and the liquid 14 and the container 1 are applied.
5 (dielectric) was measured for the capacitance of the capacitor 19 (FIGS. 1 and 2). Table 1 shows the results. Table 1 also shows the alcohol concentration of each liquid 14.

[0029]

[Table 1]

As is clear from Table 1, the capacitance of Example 1 was 200 pF, whereas the capacitance of Examples 2 to 5 was 171 to 192 pF, and pure water (Example 1) was used.
And alcohol-containing water (Examples 2 to 5) could be clearly distinguished.

<Comparative Test 2 and Evaluation> Outside the containers of Examples 6 to 9, the same pair of electrodes as those of Comparative Test 1 were provided. The same impedance analyzer (HP4191A: manufactured by Yokogawa Hewlett-Packard Company) was connected to the pair of electrodes. In this state, a high-frequency voltage of 1 MHz was applied to the pair of electrodes, and the capacitance of a capacitor composed of the pair of electrodes, ink, and a container (dielectric) was measured. Table 2 shows the results. Table 2 also shows the solvent of each ink.

[0032]

[Table 2]

As is evident from Table 2, the capacitance greatly differs depending on the type of the solvent of each ink, and each ink can be clearly distinguished depending on the type of the solvent.

[0034]

As described above, according to the present invention, a pair of electrodes are arranged so as to sandwich at least a part of a liquid stored in a non-conductive container, and a high-frequency voltage is applied between the pair of electrodes. The electrostatic properties of a capacitor composed of a pair of electrodes and a liquid sandwiched between these electrodes were measured. Can be reliably and instantaneously determined from outside the container. Also, the first pair of electrodes
If the value of the current flowing through the exciting coil and the phase delay of the current with respect to the high-frequency voltage are measured in a state where the coil is electrically connected and a high-frequency voltage is applied to the exciting coil facing the first coil, the difference depends on the type of liquid. From the current value and the phase lag, the type of liquid stored in the container can be reliably and instantaneously determined from outside the container.

A first and a second coil are connected in series to the pair of electrodes, and an exciting coil and a detecting coil are provided opposite to the first and second coils, respectively, and a high-frequency voltage is applied to the exciting coil. If the voltage generated in the detection coil is measured,
The type of liquid stored in the container can be reliably and instantaneously determined from outside the container. In addition, if the liquid is ink or paint, and if the type of solvent or pigment or the content ratio thereof is changed for each type of liquid, the difference in dielectric constant increases depending on the type of liquid, so the type of liquid can be determined more reliably. can do. Further, if the liquid is drinking water stored in the container, it is possible to reliably determine from the outside of the container whether the liquid contains alcohol or whether the liquid is spoiled.

Further, the first measuring device is configured to apply a high-frequency voltage between the pair of electrodes and measure different electrostatic characteristics for each type of liquid, or the second measuring device applies the high-frequency voltage to the exciting coil. A different current value for each type of liquid applied and generated in the excitation coil and a phase delay of the current with respect to the high-frequency voltage are configured to be measured, or a third measuring device applies and detects the high-frequency voltage to the excitation coil If different voltages are measured for each type of liquid generated in the coil, the same effect as described above can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an electrode of a discriminating apparatus according to a first embodiment of the present invention and a container storing drinking water.

FIG. 2 is a circuit configuration diagram of the determination device.

FIG. 3 is a perspective view of a container having a discriminating device according to a second embodiment of the present invention and containing ink.

FIG. 4 is a circuit configuration diagram of the determination device.

FIG. 5 is a sectional view taken along line AA of FIG. 3;

FIG. 6 is a perspective view of a printing machine including a container in which the ink is stored.

FIG. 7 is a circuit configuration diagram of a determination device according to a third embodiment of the present invention.

[Explanation of symbols]

 10, 30, 70 discriminating device 11 first measuring device 14 drinking water (liquid) 15, 35 container 16, 17 electrode 32 second measuring device 34 ink (liquid) 47 excitation coil 51, 71 first coil 72 second coil 73 Third measuring device 78 Detection coil

Continued on the front page (72) Inventor Masaru Yonezawa 3-1-1, Nihonbashihamacho, Chuo-ku, Tokyo Mitsubishi Materials Corporation Mobile Business Development Center (72) Inventor Masami Miyake 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Address Mitsubishi Materials Corporation Research Laboratory (72) Inventor Seiro Yawata 1-6-1, Otemachi, Chiyoda-ku, Tokyo Intellectual Property Services Corporation (72) Inventor Shigeru Yashima Shimei, Shibata-cho, Shibata-gun, Miyagi Pref. No. 3 in Tohoku Ricoh Co., Ltd. (72) Inventor Shigenobu Akikawa Shimada, Shibata-cho, Shibata-gun, Miyagi Prefecture Nakamei Ikami 3 No. 1 in Tohoku Ricoh Co., Ltd. (72) Inventor Sumio Suzuki Shibata-cho, Shibata-gun, Miyagi 1 in Tohoku Ricoh Co., Ltd., 3 of Nakamyo Ikegami Shinmei-do (72) Inventor Hideaki Matsuda 3 in 1 of Tomihoku Ryoko Shinmei-do, Shimada-cho, Shibata-cho, Shibata-gun, Miyagi F term (reference) 2G053 AA00 BA05 BC02 BC14 CA03 CB25 2G060 AA05 AA20 AE40 AF03 AF10 AG08 AG11 HA02 HC10

Claims (10)

[Claims] A liquid (1) stored in a non-conductive container (15).
4) A pair of electrodes (16, 17) are arranged so as to sandwich at least a part of the liquid crystal, and a high-frequency voltage is applied between the pair of electrodes (16, 17) to measure electrostatic characteristics, thereby measuring the liquid. How to determine the type. 2. A liquid (3) stored in a non-conductive container (35).
A pair of electrodes (16, 17) are arranged so as to sandwich at least a part of 4), a first coil (51) is electrically connected to the pair of electrodes (16, 17), and the first coil ( With the high frequency voltage applied to the exciting coil (47) facing
(47) A method for determining the type of liquid by measuring a value of a current flowing through the current and a phase delay of the current with respect to the high-frequency voltage. 3. A pair of electrodes (16, 17) are arranged so as to sandwich at least a part of a liquid stored in a non-conductive container,
A first and a second coil (71, 72) are connected in series to the pair of electrodes (16, 17), and an exciting coil (47) and an exciting coil (47) are respectively opposed to the first and second coils (71, 72). A method in which a detection coil (78) is provided, and a type of liquid is determined by measuring a voltage generated in the detection coil (78) in a state where a high-frequency voltage is applied to the excitation coil (47). 4. The liquid according to claim 1, wherein the liquid (34) is ink or paint, and the type of the solvent or the pigment or the content ratio thereof is changed for each type of the liquid (34). How to determine the type. 5. The method according to claim 1, wherein the liquid (14) is drinking water stored in a container (15). 6. A liquid (1) stored in a non-conductive container (15).
4) a pair of electrodes arranged to sandwich at least a part of
(16, 17), and a first measuring device (11) for applying a high-frequency voltage between the pair of electrodes (16, 17) and measuring different electrostatic characteristics for each type of the liquid (14). Liquid type discrimination device. 7. A liquid (3) stored in a non-conductive container (35).
4) a pair of electrodes arranged to sandwich at least a part of
(16, 17), a first coil (51) electrically connected to the pair of electrodes (16, 17), and an excitation coil (4) provided to face the first coil (51).
7) applying a high-frequency voltage to the exciting coil (47) and measuring a current value different for each type of the liquid (34) generated in the exciting coil (47) and a phase delay of the current with respect to the high-frequency voltage. And a second measuring device (32) for determining the type of liquid. 8. A pair of electrodes (16, 17) arranged so as to sandwich at least a part of a liquid stored in a non-conductive container.
A first and a second coil (71, 72) connected in series to the pair of electrodes (16, 17); and a first and a second coil (71, 72). An excitation coil (47) and a detection coil (78); and a third measuring device for applying a high-frequency voltage to the excitation coil (47) and measuring a different voltage for each type of the liquid generated in the detection coil (78). (73) A liquid type discrimination device comprising: 9. The liquid according to claim 6, wherein the liquid (34) is an ink or a paint, and the type of the solvent or the pigment or the content ratio thereof is changed for each type of the liquid (34). Type discriminator. 10. The liquid type discriminating apparatus according to claim 6, wherein the liquid (14) is drinking water stored in a container (15).