KR20160121738A - A sensor apparatus for measuring quality of water strengthened waterproof function - Google Patents

A sensor apparatus for measuring quality of water strengthened waterproof function Download PDF

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Publication number
KR20160121738A
KR20160121738A KR1020150051060A KR20150051060A KR20160121738A KR 20160121738 A KR20160121738 A KR 20160121738A KR 1020150051060 A KR1020150051060 A KR 1020150051060A KR 20150051060 A KR20150051060 A KR 20150051060A KR 20160121738 A KR20160121738 A KR 20160121738A
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South Korea
Prior art keywords
sensor module
housing
cap
seawater
disposed
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KR1020150051060A
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Korean (ko)
Inventor
이익재
이기목
강창익
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주식회사 과학기술분석센타
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Priority to KR1020150051060A priority Critical patent/KR20160121738A/en
Publication of KR20160121738A publication Critical patent/KR20160121738A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1813—Specific cations in water, e.g. heavy metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/188—Determining the state of nitrification
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Dispersion Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Emergency Medicine (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

A body housing; A lower cap coupled with the lower opening of the main housing to be hermetically closed, in which a plurality of connector modules are disposed; An upper cap coupled with the upper opening of the main housing to be hermetically closed and having a plurality of waterproof connector modules disposed therein; A sealing reinforcing member disposed between the main body housing and the lower and upper caps; A moisture sensor module disposed inside the body housing; A plurality of water quality sensor modules connected to the connector module of the lower cap; A sensor module housing which is hollow from the upper side to the lower side to receive the sensor module, the upper side of which is coupled with the lower cap, and the sea air outlet hole is formed on the upper side; And a seawater inflow cap coupled to cover the lower opening of the sensor module housing.

Description

Technical Field [0001] The present invention relates to a water-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality sensor device, and more particularly, to a water quality sensor device having a waterproof function.

In recent years, interest in environmental pollution has increased globally. Particularly, researches related to water pollution are actively proceeding. Since water is the source of all living things, efforts are being made to improve the measurement and pollution of water.

Water pollution refers to a phenomenon in which pollutants generated by human activities flow into surface waters and seawater, resulting in deterioration of water quality and destruction of water resources and ecosystems.

The degree of water pollution can be judged roughly by confirming the suspended substances, odor, foam, color, water temperature, etc. with the five senses. In addition, it can be judged chemically whether proper oxygen and minerals necessary for living organisms are dissolved, whether there is no toxicity, whether biologically appropriate for living and habit of animals and plants. However, in order to express this as an objective value, a sensor device can be used, which uses indicators such as BOD (biological oxygen demand) and COD (chemical oxygen demand).

However, such a water quality measurement sensor apparatus includes a plurality of electrical components such as a signal processing section for processing measured values measured through various kinds of sensors. Therefore, the water quality measuring device required a high level of waterproof space as a part.

In addition, even if water leaks into the waterproof space of the conventional water quality measurement sensor device, since the power supply is continuously supplied, the water quality measurement sensor device can be extended to more serious troubles.

Korean Registered Patent No. 10-0896044 (registered on April 27, 2009)

SUMMARY OF THE INVENTION An embodiment of the present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a water quality sensor device having a waterproof function enhanced by using an airtight reinforcing member or the like.

The present invention also provides a water quality measuring device capable of immediately shutting off the power supply when water flows into a space requiring waterproofing. Further, the waterproof function of the connector disposed on the outer surface of the water quality sensor device is improved.

In order to solve the above-described problems, an embodiment of the present invention provides a portable terminal comprising: a main body housing; A lower cap coupled with the lower opening of the main housing to be hermetically closed, in which a plurality of connector modules are disposed; An upper cap coupled with the upper opening of the main housing to be hermetically closed and having a plurality of waterproof connector modules disposed therein; A sealing reinforcing member disposed between the main body housing and the lower and upper caps; A moisture sensor module disposed inside the body housing; A plurality of water quality sensor modules connected to the connector module of the lower cap; A sensor module housing which is hollow from the upper side to the lower side to receive the sensor module, the upper side of which is coupled with the lower cap, and the sea air outlet hole is formed on the upper side; And a seawater inflow cap coupled to cover the lower opening of the sensor module housing.

A signal processor for processing signals measured through the sensor module in the main body housing; And a data transmission unit for transmitting data processed through the signal processing unit.

The water quality sensor module includes at least one of a PH sensor module, a DO sensor module, an EC sensor module, a NO 3 sensor module, a temperature sensor module, and a turbidity sensor module.

The waterproof connector module is connected to a power source and a communication cable, and is waterproofed by epoxy molding.

At least one of the moisture sensor modules is disposed.

The moisture sensor module may further include a power controller for shutting off supply of power when moisture is detected in the moisture sensor module.

The hermetic reinforcing member is an o-ring made of rubber.

The seawater inflow cap includes a seawater passage portion passing through both side ends thereof; A first through hole communicating with the seawater passage portion in the vicinity of one surface edge; And a second through-hole communicating with the seawater passage portion in the vicinity of the other surface edge not facing the first through-hole.

The seawater inflow cap may further include an engagement hole penetrating from one side to the other side along the outer periphery.

The seawater inlet cap may be engaged with the sensor module housing by inserting a screw into the coupling hole.

As described above, according to the present invention, various effects including the following can be expected. However, the present invention does not necessarily achieve the following effects.

The water quality measurement sensor device of the present invention can provide a high level of waterproof function in a space in which the signal processing unit is disposed. In addition, if moisture is partially detected by the moisture sensor module, the power supply is immediately cut off, thereby preventing secondary damage. The waterproof connector module enables stable power supply and data communication.

In addition, measurement accuracy can be improved by moderating the inflow speed of seawater for water quality measurement.

1 is a perspective view illustrating a water quality measurement sensor device according to an embodiment of the present invention.
Fig. 2 is an exploded perspective view of Fig.
Figure 3 is a cross-sectional view taken along line B of Figure 2
Fig. 4 is a partial cutaway perspective view of Fig.
FIG. 5 is a block diagram of the water quality measurement sensor device 100 of FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a water quality measurement sensor device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a partial sectional view of FIG.

1 to 3, the water quality measurement sensor device includes a body housing 10, a lower cap 20, an upper cap 30, a hermetic reinforcing member 70, a moisture sensor module 45, 40, a sensor module housing 50, and a seawater inflow cap 60.

The water quality measurement sensor device according to an embodiment of the present invention is obtained in a standing state perpendicular to the water surface. Therefore, a lifting loop (not shown) to which a lifting rope (not shown) is connected is provided on the upper surface of the upper cap 30 located on the uppermost side of the water quality sensor device. Then, the seawater flows through the seawater inflow cap 60 which is connected to the lowermost side.

That is, the components of the water quality measurement sensor device are arranged in a line in one direction and coupled.

The main body housing 10 is cylindrical in shape from the upper side to the lower side.

The main body housing 10 is located on the same plane as the upper and lower opening surfaces and includes a ring-shaped upper first engaging portion 12 and a lower first engaging portion 12 extending radially from the outer peripheral surface of the main body housing 10, (14). At this time, the coupling surfaces of the upper and lower first coupling portions 12, 14 are flat.

A signal processing unit (not shown) and a data transfer unit (not shown) are disposed inside the main body housing 10. A signal processing unit (not shown) processes signals measured through the water quality sensor module 40. A data transfer unit (not shown) transfers data processed through a signal processing unit (not shown).

For example, a signal processing unit (not shown) and a data transfer unit (not shown) are disposed on the printed circuit board 80, respectively. In addition, the printed circuit board 80 may further include a power control unit (not shown) capable of cutting off the supply of power.

At this time, the printed circuit board 80 can be fixedly installed near the upper side of the main body housing 10. [ To this end, a bracket (not shown) or the like may be further provided inside the main body housing 10.

On the other hand, a plurality of electric wires are connected to the printed circuit board 80. Specifically, it is an electric wire for supplying electric power, an electric wire for providing processing data of a signal processing unit (not shown) to an external terminal, and an electric wire for transmitting a signal transmitted from the water quality sensor module 40.

In addition, a moisture sensor module 45 is disposed inside the main body housing 10. The moisture sensor module 45 includes a sensor for electrically detecting moisture. The sensor may be a noncontact measurement method using infrared rays or microwaves.

At this time, at least one moisture sensor module 45 may be disposed inside the main body housing. This is because the upper and lower sides of the main housing 10 are open so that water can penetrate both sides. Therefore, it is preferable to arrange at least one on the upper side and the lower side for accurate moisture detection.

When the moisture sensor module 45 detects moisture, the supply of power is immediately shut off. To this end, the water quality sensor device may further include a power control unit (not shown). The power supply unit may further include a power unit (not shown) for converting the power supplied by the power cable 90 and supplying the power to the signal processing unit (not shown).

The power control unit (not shown) may be disposed inside the printed circuit board 80 as described above. In addition, the power supply control unit (not shown) may be disposed outside the printed circuit board 80.

In any case, the power supply control unit (not shown) is electrically connected to the moisture sensor module 45 and can interrupt the power supply immediately upon receiving the moisture detection signal.

The upper cap 30 is coupled so that the upper opening of the main body housing 10 is hermetically closed. Further, the lower cap 20 is coupled so that the lower opening of the main body housing 10 is hermetically closed.

The upper and lower caps 20 and 30 include upper and lower cap engaging plates 25 and 35 corresponding to the upper and lower first engaging portions 12 and 14. The upper and lower cap coupling plates 25 and 35 are coupled to the upper and lower first coupling portions 12 and 14 by fastening means such as screws.

In particular, the upper and lower caps 20 and 30 must be able to seal the main housing 10 so that seawater does not leak into the main housing 10 as the hydraulic pressure increases. This is because the inside of the main body housing 10 contains a large number of electrical parts such as a printed circuit board 80 and electric wires that cause malfunctions when brought into contact with water.

To this end, a sealing cylinder 38 may be further provided on one surface of the upper cap coupling plate 35 to improve the sealing force. When the sealing cylinder 38 is inserted into the main body housing 10, the sealing cylinder 38 can be brought into close contact with the inner circumferential surface to exhibit a waterproof effect.

A hermetic reinforcing member 70 is disposed between the body housing 10 and the upper and lower caps 20 and 30, respectively. Specifically, the hermetic reinforcing member 70 is an O-ring made of rubber. Therefore, a groove (not shown) is formed in the main housing 10 and the upper and lower caps 20 and 30 so that an O-ring can be disposed.

Thus, 100% complete waterproof effect on the main body housing 10 can be obtained by interposing an O-ring which is a packing member having an elastic force.

A plurality of lower connector modules 22 are disposed on the lower cap 20. The lower connector module 22 includes a 4-pin female connector. The lower connector module 22 exposes a 4-pin female connector on one surface of the lower cap 20 and a wire connecting portion (not shown) connected to a signal processing portion (not shown) on the other surface.

On the other hand, a plurality of waterproof connector modules 32 are disposed on the upper cap 30. The waterproof connector module 32 includes a 4-pin or 10-pin female connector. Particularly, the waterproof connector module 32 is connected to a power cable 90 for supplying current to the water quality sensor device and a communication cable 91 for data communication with an external terminal or the like.

When the water quality measurement sensor device is obtained, the waterproof connector module 32 is directly exposed to water. Further, when the depth of entry is deepened, water penetrates between the connector modules due to the water pressure.

Therefore, for reliable power supply and communication, the waterproof connector module 32 must provide 100% complete waterproofing.

The waterproof connector module 32 is capable of completely blocking the penetration of water into the connection portion by subjecting the power and communication cables 90 and 91 to epoxy molding thereon.

Specifically, the epoxy molding is completed by pouring the epoxy molding liquid onto the connection portions of the power source and the communication cables 90 (91), and drying and solidifying the epoxy molding liquid.

The water quality sensor module 40 is connected to the lower connector module 22. Accordingly, the water quality sensor module 40 includes a 4-pin male connector. The lower connector module 22 may further include a connector lock (not shown) that locks the connection state when the water quality sensor module 40 is connected.

The water quality sensor module 40 may include at least one of a pH sensor module for water quality measurement, a DO sensor module, an EC sensor module, a NO 3 sensor module, a temperature sensor module, and a turbidity sensor module. Hereinafter, each of the water quality sensor modules 40 will be described.

1) The pH sensor module includes a sensor for measuring the acidity or alkalinity of water. Specifically, the pH value is calculated by measuring the hydrogen ion concentration.

2) DO (Dissolved Oxygen) sensor module is a sensor module that measures the amount of dissolved oxygen in water. Dissolved oxygen is indispensable for the action of water and the survival of aquatic organisms. As the degree of pollution increases, the amount of dissolved oxygen decreases.

3) The EC sensor module includes a sensor for measuring the concentration of salts. Specifically, if dissociated ions are present in water, the principle of electricity is used. It is also called an electric conductivity sensor.

4) The NO 3 sensor module includes a sensor that responds to nitrate ions and indicates the voltage that corresponds to the concentration and activity. Provide measurements related to nitrate ions.

5) The temperature sensor module includes a sensor for measuring the temperature. Some sensor modules require an accurate water temperature because the measured values must be converted based on temperature.

6) Turbidity The sensor module includes a sensor to measure the degree of water fog. If water contains a variety of suspended matter, it looks turbid when viewed by the naked eye, and the possibility of contamination of water quality can be judged by objective turbidity.

At this time, a part of the water quality sensor module 40 must be calibrated before use to calculate a correct measurement value. The water quality sensor module 40 should be cleaned and stored after use.

After the water quality measurement is completed, the water quality sensor module 40 converts the measurement values provided by the respective sensors into electric signals and transmits them to a signal processing unit (not shown).

Fig. 4 is a partially cutaway perspective view of Fig. 2; Fig.

Referring to FIG. 4, the sensor module housing 50 is cylindrical in shape from the upper side to the lower side. The sensor module housing 50 includes a second engaging portion 56 positioned on the same plane as the opening surface and extending radially from the outer circumferential surface of the sensor module housing 50.

The second engaging portion 56 is coupled to the lower cap engaging plate 25 with a screw or the like. The second engaging portion 56, the lower cap engaging plate 25, and the lower first engaging portion 14 may be coupled together by screws or the like.

On the other hand, a seawater discharge hole 54 may be formed on the upper peripheral surface of the sensor module housing 50. The seawater outlet hole 54 is a hole through which the introduced seawater flows out of the sensor module housing 50.

The seawater outflow hole 54 is provided on the upper side of the sensor module housing 50 so that the seawater outflow hole 54 can flow out of the sensor module housing 50 when the level of the seawater flowing through the seawater inflow cap 60 becomes higher than a certain level.

The interior of the sensor module housing (50) accommodates the water quality sensor module (40). At this time, the water quality sensor module 40 is arranged in the downward direction from the upper side of the sensor module housing 50, and is in contact with the seawater flowing from the lower side.

In addition, the sensor module housing 50 is formed of a metallic material and is rigid. Thus, the sensor module housing 50 can protect the water quality sensor module 40. As a result, the possibility of breakage that may occur when the water quality sensor module 40 is exposed to the seawater as it is is disappeared.

The outer circumferential surface of the sensor module housing 50 has a constant thickness. In addition, a plurality of coupling grooves 52 may be formed on the end portion located around the lower opening.

The seawater inlet cap 60 is coupled to cover the lower opening of the sensor module housing 50. For this purpose, the sea water inflow cap 60 has a plurality of engagement holes 68 extending from one surface to the other surface along the outer periphery thereof.

The seawater inlet cap 60 can be coupled to the sensor module housing 50 by aligning the engagement holes 68 in each of the engagement grooves 52 and inserting and screwing in the screws. Alternatively, the seawater inlet cap 60 may be integrally formed below the sensor module housing 50.

Specifically, the seawater inlet cap 60 includes a seawater passage portion 62, a first through-hole 64, and a second through-hole 66.

The seawater inlet cap 60 is in the shape of a circular plate having a thickness. The seawater passage portion 62 is a hole penetrating both ends of the outer circumferential surface constituting the side surface of the circular plate.

The first through hole 64 is a circular hole communicating with the seawater passage portion 62 near one edge of the circular plate. On the other hand, the second through hole 66 is a circular hole communicating with the sea water passage portion 62 near the other surface edge of the circular plate.

However, the first and second through holes 64 and 66 are formed at positions not facing each other. That is, they are arranged to be shifted 180 degrees apart from each other.

The seawater inflow cap 60 is coupled such that any one of the first and second through holes 66 is opposed to the lower opening of the sensor module housing 50.

For example, when the first through hole 64 is coupled to the lower opening of the sensor module housing 50, the seawater finally flows into the sensor module housing 50 through the first through hole 64.

At this time, the seawater flows into the seawater inflow cap 60 through the second through-hole 66 for the first time. Further, the seawater can also be introduced through the openings at both ends of the seawater passage portion 62.

However, since the seawater introduced into the seawater inflow cap 60 can flow into the sensor module housing 50 only through the first through-hole 64, the seawater must pass through the seawater passage portion 62.

That is, the seawater can not flow directly into the sensor module housing 50, and is moved along the movement path formed inside the seawater inflow cap 60 once. As a result. The seawater may flow into the sensor module housing 50 at a relatively moderate rate.

Therefore, the water quality measurement sensor device can prevent the seawater from being suddenly introduced into the sensor module housing 50 when the water quality measurement sensor device is acquired.

5 is a control block diagram of the water quality measurement sensor device of FIG.

Referring to FIG. 1, the water quality sensor module 40 and the moisture sensor module 45 operate independently with the acquisition of the water quality sensor device.

Upon receiving the moisture detection signal from the moisture sensor module 45, the power supply control unit (not shown) can cut off the supply of power to the signal processing unit (not shown) in the power supply unit (not shown). That is, when there is no moisture detection signal, the power supply unit (not shown) continuously supplies power to the signal processing unit (not shown).

The signal processor (not shown) processes the signal received from the water quality sensor module 40 and transmits the signal to a data transmitter (not shown).

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 embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: main body housing 12: upper first coupling portion
14: lower first coupling portion 20: lower cap 22: lower connector module 25: lower cap coupling plate
30: upper cap 32: waterproof connector module
35: upper cap coupling plate 38: sealing cylinder
40: water quality sensor module 45: moisture sensor module
50: sensor module housing 52: engaging groove
54: seawater outlet hole 56: second coupling portion
60: Seawater inflow cap 62: Seawater passage section
64: first through hole 66: second through hole
68: engaging hole 70: sealing strengthening member
90: Power cable 91: Communication cable

Claims (10)

A body housing;
A lower cap coupled with the lower opening of the main housing to be hermetically closed, in which a plurality of connector modules are disposed;
An upper cap coupled with the upper opening of the main housing to be hermetically closed and having a plurality of waterproof connector modules disposed therein;
A sealing reinforcing member disposed between the main body housing and the lower and upper caps;
A moisture sensor module disposed inside the body housing;
A plurality of water quality sensor modules connected to the connector module of the lower cap;
A sensor module housing which is hollow from the upper side to the lower side to receive the sensor module, the upper side of which is coupled with the lower cap, and the sea air outlet hole is formed on the upper side; And
And a seawater inflow cap coupled to cover the lower opening of the sensor module housing.
[2] The apparatus according to claim 1,
A signal processing unit for processing a signal measured through the sensor module; And
And a data transmission unit for transmitting data processed through the signal processing unit is disposed.
The method according to claim 1,
Wherein the water quality sensor module includes at least one of a PH sensor module, a DO sensor module, an EC sensor module, a NO 3 sensor module, a temperature sensor module, and a turbidity sensor module.
The method according to claim 1,
Wherein the waterproof connector module is connected to a power supply and a communication cable, and is waterproofed by epoxy molding, and the waterproof function is enhanced.
The method according to claim 1,
Wherein at least one of the moisture sensor modules is disposed.
The method according to claim 1,
And a power supply controller for shutting off the supply of power when the moisture sensor module detects moisture in the main body housing.
The method according to claim 1,
Wherein the hermetic reinforcing member is an o-ring made of a rubber material.
8. The method according to any one of claims 1 to 7,
The seawater inlet cap
A seawater passage portion penetrating both lateral sides;
A first through hole communicating with the seawater passage portion in the vicinity of one surface edge;
And a second through hole communicating with the seawater passage portion in the vicinity of the other surface edge not facing the first through hole.
9. The method of claim 8,
Wherein the seawater inflow cap further includes an engagement hole penetrating from one side to the other side along the outer periphery.
10. The method of claim 9,
And the seawater inflow cap has a waterproof function enhanced by inserting a screw into the engagement hole and engaging with the sensor module housing.
KR1020150051060A 2015-04-10 2015-04-10 A sensor apparatus for measuring quality of water strengthened waterproof function KR20160121738A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106841313A (en) * 2017-02-21 2017-06-13 华景科技无锡有限公司 A kind of water quality detection sensor structure and water quality detection method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100896044B1 (en) 2008-11-06 2009-05-11 (주)썬텍엔지니어링 Apparatus for automatically measuring quality of water

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100896044B1 (en) 2008-11-06 2009-05-11 (주)썬텍엔지니어링 Apparatus for automatically measuring quality of water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106841313A (en) * 2017-02-21 2017-06-13 华景科技无锡有限公司 A kind of water quality detection sensor structure and water quality detection method
CN106841313B (en) * 2017-02-21 2023-11-17 华景科技无锡有限公司 Water quality detection sensor structure and water quality detection method

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