KR101807650B1 - Water level and water temperature measurement apparatus - Google Patents

Water level and water temperature measurement apparatus Download PDF

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Publication number
KR101807650B1
KR101807650B1 KR1020150168337A KR20150168337A KR101807650B1 KR 101807650 B1 KR101807650 B1 KR 101807650B1 KR 1020150168337 A KR1020150168337 A KR 1020150168337A KR 20150168337 A KR20150168337 A KR 20150168337A KR 101807650 B1 KR101807650 B1 KR 101807650B1
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KR
South Korea
Prior art keywords
water level
water temperature
sensing unit
water
printed
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KR1020150168337A
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Korean (ko)
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KR20170064025A (en
Inventor
강문식
김동환
이빛나
정대곤
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(주) 파루
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Disclosed is a water level and water temperature measuring device capable of measuring a water temperature distribution according to a water level as well as a liquid level of a liquid contained in a container.
The present invention is characterized in that the water level sensing part and the water temperature sensing part are printed very thinly and transparently on the transparent substrate by the electronic ink printing method so that they can be easily attached to the bent part and can be formed transparently, It is effective.

Description

[0001] DESCRIPTION [0002] WATER LEVEL AND WATER TEMPERATURE MEASUREMENT APPARATUS [0003]

The present invention relates to a water level and water temperature measuring apparatus, and more particularly, to a water level and water temperature measuring apparatus, which comprises a water level sensing unit for sensing a change in capacitance according to a level of liquid contained in a container attached to a container capable of containing liquid, And to a water level and water temperature measuring apparatus capable of measuring a distribution of water temperature according to a water level and a water level using a printed translucent substrate printed on the water temperature sensing unit.

Generally, the water level sensing device has a contact type and a non-contact type, and the contact type can be divided into an input type, a differential pressure type, and a capacitance type. Among them, the electrostatic capacitive level sensing device utilizes the property that the electrostatic capacity of the liquid is proportional to the height of the liquid, and thus it is attracting attention in terms of precision and economical efficiency.

Conventionally, a deposition and etching method in which copper or aluminum is plated over the entire substrate to form an electronic circuit, and only the necessary portion is left and the rest is removed is mainly used. However, such a deposition and etching method has a disadvantage in that a large amount of conductive material is wasted.

In order to improve this, in recent years, a printing electronic system, which is a technology for manufacturing only a desired electronic circuit part by printing with a conductive electronic ink on a substrate or a film, is used. Such a printing electronic system is an ultra-thin, low- Billboards, sign boards, disposable displays, RFID, and smart cards.

Korean Unexamined Patent Application Publication No. 10-2013-0093959 discloses a water level sensor having an excellent measurement reliability and a water level sensing system of an apparatus using the water level sensor. However, the present invention can sense the liquid level of the liquid immersed in the container, can not detect the distribution of the water temperature according to the water level change, which is information other than the liquid level of the liquid contained in the container, There is a problem that the liquid inside can not be made transparent so that the liquid can be visually confirmed.

Korean Patent Laid-open Publication No. 10-2013-0099300 discloses a capacitance type water level detection sensor. However, by fabricating an electrode for sensing a capacitance, it is possible to check the change in capacitance according to the level of the liquid bag to check the level of the liquid There is a problem that the distribution of water temperature can not be detected due to the information transference other than the water level.

Korean Patent Laid-Open Publication No. 10-2015-0108499 discloses an urea aqueous solution temperature control apparatus which detects the temperature of an aqueous urea solution and detects the level of the aqueous urea solution. However, the above-mentioned urea aqueous solution temperature control device can not be installed on a curved surface, and only the water level and the water temperature are detected, and the distribution of the water temperature according to the water level and the water level of the aqueous urea solution can not be detected.

Korean Patent Publication No. 10-2013-0093959 Korean Patent Publication No. 10-2013-0099300 Korean Patent Publication No. 10-2015-0108499

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a transparent substrate which can detect not only the liquid level of the liquid in the container but also the distribution of water temperature according to the liquid level and can be easily attached to the surface of the curved container, The present invention provides a water level and water temperature measuring device which is transparently formed so as to show the inside of a container using a printing electronic system.

In order to achieve the above object, the present invention provides a water level sensing unit formed to have a predetermined length and sensing a change in capacitance according to a water level in a predetermined longitudinal direction, the water level sensing unit having a predetermined length, A water temperature sensing unit for sensing a change in resistance value according to the distribution of water temperature, and a light-transmitting substrate on which the water level sensing unit and the water temperature sensing unit are printed.

A display unit for displaying a distribution of water temperature according to a water level and a water level using a change in capacitance sensed by the water level sensing unit and a change in resistance value according to a distribution of water temperature sensed by the water temperature sensing unit, And an electrode unit connected to the water temperature sensing unit, wherein the electrode unit may be printed on the transparent substrate.

Wherein the display unit receives the change in the capacitance sensed by the water level sensing unit from the water level sensing unit to determine a water level according to the change in the capacitance and changes the resistance value according to the distribution of the water temperature sensed by the water temperature sensing unit, A control unit for receiving the temperature signal from the sensing unit and determining the water temperature according to the resistance value, and an output unit for outputting the water temperature distribution according to the water level and the water level determined by the control unit.

The water level and water temperature measuring device may be one in which the thickness of the water level sensing part, the water temperature sensing part, and the electrode part is 100 μm or more and 200 μm or less.

The water level and water temperature measuring apparatus may have a line width of 1 占 퐉 or more and 20 占 퐉 or less printed on the water level sensing unit, the water temperature sensing unit, and the electrode unit.

The water level sensing unit may be printed using silver ink, which is a conductive ink using silver nano.

The water temperature sensing unit may be printed with PTC (Positive Temperature Coefficient) ink having a characteristic that the resistance increases as the water temperature increases.

The electrode unit may be printed using silver ink, which is a conductive ink using silver nano.

The PTC ink may be at least one selected from the group consisting of ethylene vinyl acetate (EVA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene .

According to the above-described water level and water temperature measuring apparatus of the present invention, the distribution of the water temperature according to the liquid level and the water level can be confirmed by sensing the distribution of the water temperature according to the water level as well as the liquid level in the container. It is possible to easily attach the water level and the water temperature measuring device to the surface of the curved container for the second time and to confirm the surface or the inside of the container having the water level and water temperature measuring device formed as the third transparent, Since the roll-to-roll gravure printing method is used, there is an effect of reducing the manufacturing cost and manufacturing cost.

FIG. 1 is a diagram showing a schematic configuration according to an embodiment of the present invention.
2 is a schematic circuit diagram showing a circuit configuration according to an embodiment of the present invention.
3 is a perspective view showing a shape attached to a curved container according to an embodiment of the present invention.
4 is a front view showing a transparent form according to an embodiment of the present invention.
FIG. 5 is a side view showing a form attached to a curved container according to an embodiment of the present invention. FIG.
FIG. 6 is a graph illustrating a change in resistance value according to water temperature in the water temperature sensing unit according to an embodiment of the present invention. Referring to FIG.
7 is a view illustrating a water level and water temperature measurement system according to an embodiment of the present invention.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to best describe the user's invention And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Throughout the specification, when a section includes a constituent element, it is understood that it can include other constituents, not excluding the other constituent elements unless specifically stated otherwise.

Throughout the specification, when a section includes a constituent element, it is understood that it can include other constituents, not excluding the other constituent elements unless specifically stated otherwise. It should be noted that the terms such as " part, "" module, " .

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 1 is a diagram showing a schematic configuration according to an embodiment of the present invention.

1, an embodiment of the present invention includes a translucent substrate 100, a water level sensing unit 110, a water temperature sensing unit 120, and a display unit 200. The display unit 200 includes a control terminal 210 And an output stage 220.

Transparent substrate 100 is a plate-like member made of a material having translucency such as glass or resin.

A bonding surface may be formed on one surface of the transparent substrate 100 so as to be detachable. Such an adhesive surface can be formed in various forms such as double-sided tape.

The water level sensing unit 110 is formed to have a predetermined length, and senses a change in capacitance according to a water level in a predetermined length direction.

The capacitance refers to the capacity of a capacitor as a value indicating the charge storage capacity of the dielectric. This capacitance is the inherent electrostatic value of all materials, and the capacitance of any material is inversely proportional to the distance of the anode and is proportional to the area.

More specifically, since the water level sensing unit 110 is formed to have a predetermined length, the water level of the liquid contained in the container, for example, the capacitor value of the water contained in the container is sensed and the water level increases as the capacitance increases. And the water level decreases as the capacitance decreases.

The water level sensing unit 110 is printed on the transparent substrate 100 by an electronic ink printing method and is formed to be transparent.

More specifically, the water level sensing unit 110 can be printed on the transparent substrate 100 with a thickness of 100 占 퐉 or more and 200 占 퐉 or less.

In addition, the level detecting section 110 can be printed on the transparent substrate 100 with a line width of 1 탆 or more and 20 탆 or less.

The water level sensing unit 110 may include one or more capacitors printed by an electronic ink printing method and the electronic ink printing method for printing the water level sensing unit 110 may be a roll to roll gravure printing method .

The roll-to-roll gravure printing method is a kind of intaglio printing, in which a pattern is formed on a cylinder at an engraved pattern, the ink is filled, the ink of the non-forming portion is scratched with a metal apparatus called a scraping, The flexible film is mainly used in such a manner that ink is transferred through contact with the flexible film.

In the former, the roll-to-roll gravure printing method is a technique of printing through direct contact, which is advantageous in that it requires fewer elements to be controlled than other printing techniques.

In addition, the water level sensing unit 110 may be printed on the transparent substrate 100 using silver ink, which is conductive ink using silver nano.

The water temperature sensing unit 120 is formed to have a predetermined length, and senses a change in resistance value according to a distribution of water temperature in a predetermined longitudinal direction.

The water temperature sensing part 120 is printed on the transparent substrate 100 by an electronic ink printing method and is formed to be transparent.

More specifically, the water temperature sensing unit 120 can be printed on the transparent substrate 100 with a thickness of 100 μm or more and 200 μm or less.

In addition, the water temperature sensing unit 120 can be printed on the transparent substrate 100 with a line width of 1 탆 or more and 20 탆 or less.

In addition, the water temperature sensing unit 120 may include one or more variable resistors printed by an electronic ink printing method, and the electronic ink printing method for printing the water temperature sensing unit 120 may be a roll to roll gravure printing method Printing.

In addition, the water temperature sensing unit 120 can be printed on the transparent substrate 100 using PTC (Positive Temperature Coefficient) ink having a characteristic that the resistance increases as the water temperature increases.

That is, the water temperature sensing unit 120 is formed to have a predetermined length. The water temperature sensing unit 120 senses a resistance value according to the temperature of the liquid contained in the container, for example, the water contained in the container. It can be recognized that the smaller the resistance value, the lower the water temperature.

Also, since the water temperature sensing unit 120 is formed in a predetermined length direction, the resistance value can be sensed according to the distribution of water temperature according to the water level.

The PTC ink may be at least one selected from the group consisting of ethylene vinyl acetate (EVA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), ethylene glycol, carbon black and graphite.

The display unit 200 displays the distribution of the water temperature according to the water level and the water level using the change in the capacitance sensed by the water level sensing unit 110 and the change in the resistance value sensed by the water temperature sensing unit 120. [

More specifically, the display unit 200 receives the change in the capacitance sensed by the water level sensing unit 110 from the water level sensing unit 110 and determines the water level according to the change in the capacitance. The water temperature sensing unit 120 And a control unit 210 for receiving a change in resistance value according to the detected temperature distribution from the water temperature sensing unit 120 and determining a water temperature according to a change in the resistance value.

More specifically, the control unit 210 can determine the distribution of the water temperature according to the water level and the water level by interchanging the change of the received capacitance and the change of the received resistance value.

Also, the display unit 200 includes an output stage 220 for outputting a distribution of water temperature according to the water level and the water level measured by the control stage 210.

More specifically, the output terminal 220 receives the distribution of the water temperature according to the water level and the water level determined by the control terminal 210, and displays the water temperature so that the user can confirm the distribution.

The output terminal 220 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three-dimensional display display) and a printed circuit board (PCB).

Here, a PCB (Printed Circuit Board) may include a flexible numeric display (FND) to display the distribution of the water temperature according to the water level and the water level received from the control terminal 210.

2 is a schematic circuit diagram showing a circuit configuration according to an embodiment of the present invention.

Referring to FIG. 2, one embodiment of the present invention includes at least one capacitor 111, at least one variable resistor 121, an electrode unit 130, a ground 140, and a display unit 200.

The water level sensing unit 110 may include one or more capacitors 111.

The capacitor 111 can be printed on the transparent substrate 100 by an electronic ink printing method.

More specifically, the capacitor 111 can be printed on the transparent substrate 100 by an electronic ink printing method using silver ink.

Since the silver ink is a conductive ink using silver nano, when the liquid contained in the container contacts the capacitor 111 printed on the transparent substrate 100, a change in the capacitor value of the liquid contacted can be detected. The capacitance can be determined by the change of the sensed capacitor value.

The display unit 200 can receive the change in capacitance from the capacitor 111 and judge and display the level of the liquid contained in the container.

The variable resistor 121 can be printed on the transparent substrate 100 by an electronic ink printing method.

More specifically, the variable resistor 121 can be printed on the transparent substrate 100 using an electronic ink printing method using PTC ink.

The PTC ink has a characteristic that the resistance increases when the water temperature is increased. When the liquid contained in the container contacts the variable resistor 121 printed on the transparent substrate 100, the resistance value of the liquid contacted can be sensed.

The display unit 200 can receive the resistance value sensed from the variable resistor 121 and judge and display the temperature of the contacted liquid.

The ground 140 can be printed on the transparent substrate 100 using the silver ink described above in the electronic ink printing method to measure the resistance value of the liquid in contact with the variable resistor 121. [

More specifically, the ground 140 can be used as a reference to sense a change in the voltage value applied across the variable resistor 121 in contact with the liquid, and to detect a change in the voltage value.

That is, the change of the voltage value applied to both ends of the variable resistor 121 in contact with the liquid can be sensed based on the ground 140, and the change in the resistance value can be sensed through the change in the sensed voltage value. It can be seen that the water temperature of the liquid contacted with the variable resistor 121 printed by the PTC ink has changed.

The electrode unit 130 connects the display unit 200, the water level sensing unit 110, and the water temperature sensing unit 120.

More specifically, the electrode unit 130 is connected to the ground 140, the variable resistor 121 included in the water temperature sensing unit 120, the capacitor 111 included in the water level sensing unit 110, and the display unit 200 do.

The electrode unit 130 may be printed on the transparent substrate 100 by an electronic ink printing method to be formed transparently.

More specifically, the electrode unit 130 may be printed on the transparent substrate 100 with a thickness of 100 m or more and 200 m or less, and the electrode unit 130 may have a line width of 1 m or more and 20 m or less, As shown in FIG.

The electronic ink printing method for printing the electrode unit 130 may be a roll to roll gravure printing method.

In addition, the electrode unit 130 can be printed on the transparent substrate 100 using silver ink, which is a conductive ink using silver nano.

The display unit 200 receives the change in the capacitance sensed by the capacitor 111 and the change in the resistance value sensed by the variable resistor 121 through the electrode unit 130.

The display unit 200 determines the distribution of the water temperature according to the level and the liquid level of the liquid by using the change of the received capacitance and the change of the resistance value as described above and displays it so that it can be confirmed outside.

3 is a perspective view showing a shape attached to a curved container according to an embodiment of the present invention.

Referring to FIG. 3, it can be seen that the water level and water temperature measuring apparatus, which is an embodiment of the present invention, can be easily attached to a bending part.

The water level sensing part 110 and the water temperature sensing part 120 are printed on the transparent substrate 100 with a thin film type in order to easily adhere the water level and the water temperature measuring device to the curved part.

More specifically, the water level sensing unit 110 and the water temperature sensing unit 120 may be a film type and may be printed on the transparent substrate 100 with a thickness of 100 μm or more and 200 μm or less.

The display unit 200 can determine the distribution of the water temperature according to the water level and the water level using the change of the capacitance received from the water level sensing unit 110 and the change of the resistance value received from the water temperature sensing unit 120, And the distribution of the water temperature according to the water level and the water level is displayed so that it can be confirmed externally.

The water level sensing unit 110 and the water temperature sensing unit 120 and the display unit 200 may be connected by wire or wirelessly.

In the case of wireless, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), the Internet, 2G, 3G, 4G mobile communication network, Wi- , Wibro, and the like, and any method may be used.

4 is a front view showing a transparent form according to an embodiment of the present invention.

Referring to FIG. 4, it can be seen that the apparatus for measuring water level and temperature, which is one embodiment of the present invention, can be made in a transparent form.

The line width of the water level sensing unit 110 and the water temperature sensing unit 120 is thinly printed on the transparent substrate 100 to make the water level and water temperature measuring apparatus transparent.

More specifically, the water level sensing unit 110 and the water temperature sensing unit 120 can be printed on the transparent substrate 100 with a line width of 1 탆 or more and 20 탆 or less.

The transparent substrate 100 may be formed of a transparent material such as polyethylene terephthalate (PET), polyimide, polyethylene (PE), polyvinyl chloride (PVC), or polystyrene fluoroethylene (PTEE).

Since the transmissive substrate 100 has low heat resistance, the transmissive substrate 100 can not be used through the conventional deposition and etching methods. However, since the printing electron system uses low heat as compared with the deposition and etching systems, ) Can be used to manufacture the product.

FIG. 5 is a side view showing a form attached to a curved container according to an embodiment of the present invention. FIG.

Referring to FIG. 5, as described above, it can be seen that the water level and water temperature measuring apparatus, which is one embodiment of the present invention, can be easily attached to a bent portion.

The translucent substrate 100 is made of a flexible material such as polyethylene terephthalate (PET), polyimide, polyethylene (PE), polyvinyl chloride (PVC), and polytetrafluoroethylene (PTEE) .

In addition, since it can be easily attached to a bending portion, it can be used irrespective of the shape of the container.

6 is a graph showing that the water temperature sensing unit 120 senses a change in resistance value according to the water temperature according to an embodiment of the present invention.

Referring to this graph, it can be confirmed that the water temperature has a resistance value of not less than 17 Ω and not more than 19 Ω at a temperature of 20 ° C. or more and 80 ° C. or less.

Therefore, when the liquid contacts the liquid level detector 120, the temperature of the liquid that is contacted can be known by using the resistance value sensed by the liquid level detector 120. [

To this end, the water level sensing unit 120 may be printed on the transparent substrate 100 using PTC (Positive Temperature Coefficient) ink having a characteristic that the resistance increases as the water temperature increases.

7 is a view illustrating a water level and water temperature measurement system according to an embodiment of the present invention.

7 shows a wet storage tank 30 in a nuclear power plant to which a water level and water temperature measuring device 300 is attached.

Nuclear power generation is costly and time consuming to build a power plant compared to other power generation, and there is a risk that radioactive waste is generated. However, due to the fact that the unit price of nuclear power is lower than other power plants, the number of nuclear power plants is increasing.

These nuclear power plants deal with radioactive materials and cause great risks in case of accidents. Therefore, real-time monitoring of the inside and outside of the nuclear power plant is indispensable.

Especially, it is difficult to provide real-time internal information when an extreme situation occurs in which nuclear power plant is difficult to access due to radiation and internal power is lost. Therefore, it is necessary to develop a device capable of real-time monitoring of information inside the nuclear power plant from the outside.

The spent fuel, which is high-level waste, generates decay heat due to sustained nuclear fission and releases the spent fuel pool 30 or dry And is stored in a spent fuel dry storage facility.

In the case of the wet storage tank 30, since the spent fuel is cooled and shielded by using the cooling water, the level of the cooling water and the measurement of the water temperature are very important matters.

The water level and water temperature measuring apparatus 300 according to an embodiment of the present invention can be attached to the irregularities unlike the conventional water temperature measuring apparatus and water level measuring apparatus and can measure the water temperature distribution according to the water level and the water level Can be used as a water level and water temperature measurement system for measuring the water level and the water temperature of the cooling water stored in the bar wet storage (30).

The water level and water temperature measuring apparatus 300 is formed by printing the water level sensing unit 110 and the water temperature sensing unit 120 on the transparent substrate 100 as described above.

More specifically, the water level sensing unit 110 is formed to have a predetermined length, and senses a change in capacitance according to a water level in a predetermined longitudinal direction.

The water level sensing unit 110 is printed on the transparent substrate 100 by an electronic ink printing method and is formed to be transparent.

More specifically, the water level sensing unit 110 can be printed on the transparent substrate 100 with a thickness of 100 占 퐉 or more and 200 占 퐉 or less.

In addition, the level detecting section 110 can be printed on the transparent substrate 100 with a line width of 1 탆 or more and 20 탆 or less.

The water level sensing unit 110 may include one or more capacitors printed by an electronic ink printing method and the electronic ink printing method for printing the water level sensing unit 110 may be a roll to roll gravure printing method .

In addition, the water level sensing unit 110 may be printed on the transparent substrate 100 using silver ink, which is conductive ink using silver nano.

The water temperature sensing unit 120 is formed to have a predetermined length, and senses a change in resistance value according to the distribution of water temperature in a predetermined length direction.

The water temperature sensing part 120 is printed on the transparent substrate 100 by an electronic ink printing method and is formed to be transparent.

More specifically, the water temperature sensing unit 120 can be printed on the transparent substrate 100 with a thickness of 100 μm or more and 200 μm or less.

In addition, the water temperature sensing unit 120 can be printed on the transparent substrate 100 with a line width of 1 탆 or more and 20 탆 or less.

In addition, the water temperature sensing unit 120 may include one or more variable resistors printed by an electronic ink printing method, and the electronic ink printing method for printing the water temperature sensing unit 120 may be a roll to roll gravure printing method Printing.

In addition, the water temperature sensing unit 120 can be printed on the transparent substrate 100 using PTC (Positive Temperature Coefficient) ink having a characteristic that the resistance increases as the water temperature increases.

Also, since the water temperature sensing unit 120 is formed in a predetermined length direction, the resistance value can be sensed according to the distribution of water temperature according to the water level.

The PTC ink may be at least one selected from the group consisting of ethylene vinyl acetate (EVA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), ethylene glycol, carbon black and graphite.

The water level and temperature measuring device 300 transmits the change of the sensed capacitance and the change of the resistance value to the user terminal 20 through the communication network 10.

The communication network 10 may be a wired network or a wireless network.

In the case of a wireless network, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), Internet, 2G, 3G, 4G mobile communication network, Wi- ), Wibro, and the like, and may be of any type.

In order to utilize such a communication network 10, the water level and temperature measuring apparatus 300 may include a communication module.

The user terminal 20 is a device for input and output.

More specifically, the user terminal 20 is equipped with a wireless transceiver for exchanging knowledge information through a mobile communication network or a wireless LAN, and includes a Qwerty keyboard for inputting knowledge information of a user, a touch screen The module is mounted.

The user terminal 20 may be implemented in various forms. For example, a smart phone, a tablet, a laptop computer, a netbook, and the like.

The user terminal 20 outputs a distribution of water temperature according to the water level and the water level determined by the controller using the change of the capacitance and the resistance value sensed by the water level and the water temperature measuring device 300, do.

The display unit may include a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a three-dimensional display And at least one selected from the group consisting of There may be two or more display units depending on the implementation of the user terminal 20. [

The user terminal 20 may include a user input for controlling the operation of the user terminal 20. [

More specifically, the user input unit may include a key pad, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like. Particularly, when the touch pad has a mutual layer structure with the display unit, it can be called a touch screen.

The user terminal 20 may include a memory unit for storing input / output data (for example, data about changes in capacitance and resistance values sensed by the water level and temperature device 300).

More specifically, the memory unit may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) A random access memory (SRAM), a read only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM) And an optical disc.

The user terminal 20 may include a communication unit for receiving a change in capacitance and a change in resistance value transmitted from the water level and water temperature measuring apparatus 300 through the communication network 10. [

The user terminal 20 may include a communication unit, a memory unit, a user input unit, and a control unit for controlling the display unit.

Also, the control unit can determine the distribution of the water temperature according to the water level and the water level by using the variation of the capacitance and the resistance value received from the water level and water temperature measuring device 300.

By measuring the distribution of water temperature according to the level and the level of the cooling water stored in the wet storage 30 of the nuclear power plant according to the water level and water temperature measuring system of the embodiment of the present invention, It is possible to prevent the accident of nuclear power generation in advance.

As described above, the construction and operation of the water level and water temperature measuring apparatus according to the embodiment of the present invention can be performed. While the present invention has been described in detail with reference to the specific embodiments, various modifications may be made without departing from the scope of the present invention. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and that various modifications and changes may be made by those skilled in the art.

100: Transparent substrate 110: Water level sensing unit
111: capacitor 120: water temperature sensing unit
121: Variable resistor 130:
140: ground 200: display
210: Control stage 220: Output stage

Claims (8)


A translucent substrate;
An electrode unit formed by printing a plurality of electrodes at predetermined intervals along the longitudinal direction of the transparent substrate;
A water level sensing unit printed on each of the plurality of electrode units printed on the transparent substrate and sensing a change in capacitance according to a water level;
A water temperature sensing unit formed at a position spaced apart from the water level sensing unit at each of the plurality of electrode units printed on the translucent substrate and sensing a change in resistance value according to a distribution of water temperature;
A display unit connected to one side of the plurality of electrode units and displaying a distribution of water temperature according to a water level and a water level using a change in capacitance sensed by the water level sensing unit and a change in resistance value according to a distribution of water temperature sensed by the water temperature sensing unit; ; And
And an electrode unit connecting the display unit, the water level sensing unit, and the water temperature sensing unit,
The electrode portion
A light-transmissive substrate,
The thickness of the water level sensing unit, the water temperature sensing unit, and the electrode unit is printed in a range of 100 μm to 200 μm, and the line width of the water level sensing unit, the water temperature sensing unit, and the electrode unit is printed in a range of 1 μm to 20 μm ,
The electronic ink printing method for printing the water level sensing part, the water temperature sensing part, and the electrode part on a transparent substrate is a roll to roll gravure printing method,
The light-
And at least one selected from the group consisting of polyethylene terephthalate (PET), polyimide, polyethylene (PE), polyvinyl chloride (PVC), and polystyrene fluoroethylene (PTEE)
Water level and water temperature measuring device.

The method according to claim 1,
The display unit
And a controller for receiving a change in capacitance detected by the water level sensing unit from the water level sensing unit to determine a water level in accordance with a change in capacitance and for detecting a change in resistance value according to a distribution of water temperature sensed by the water temperature sensing unit, A control unit for receiving the water temperature and determining the temperature according to the change of the resistance value;
And an output stage for outputting a distribution of water temperature according to the water level and the water level determined by the control unit
Water level and water temperature measuring device.

The method according to claim 1,
The water level sensing unit
Is printed using silver ink, which is conductive ink using nano.
Water level and water temperature measuring device.

The method according to claim 1,
The water temperature sensing unit
And is printed with a PTC (Positive Temperature Coefficient) ink having a characteristic that the resistance increases as the water temperature increases
Water level and water temperature measuring device.

The method according to claim 1,
The electrode portion
Is printed using silver ink, which is conductive ink using nano.
Water level and water temperature measuring device.

5. The method of claim 4,
The PTC ink
And at least one selected from the group consisting of ethylene vinyl acetate (EVA), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), polypropylene (PP), ethylene glycol, carbon black and graphite
Water level and water temperature measuring device. delete delete
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DE102019134440A1 (en) * 2019-12-16 2021-06-17 Endress + Hauser Wetzer Gmbh + Co. Kg Measuring device
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006208154A (en) * 2005-01-27 2006-08-10 Idemitsu Kosan Co Ltd Powder height level measuring method, powder height level measuring device, and method for manufacturing polyolefin using measuring device thereof
US20090120180A1 (en) * 2007-11-12 2009-05-14 Yung-Lieh Chien Solution metering apparatus having temperature sensing function

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006208154A (en) * 2005-01-27 2006-08-10 Idemitsu Kosan Co Ltd Powder height level measuring method, powder height level measuring device, and method for manufacturing polyolefin using measuring device thereof
US20090120180A1 (en) * 2007-11-12 2009-05-14 Yung-Lieh Chien Solution metering apparatus having temperature sensing function

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