KR20060030673A - Measuring methode and apparatus for specific gravity of electrolyte of storage battery - Google Patents

Measuring methode and apparatus for specific gravity of electrolyte of storage battery Download PDF

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KR20060030673A
KR20060030673A KR1020040079530A KR20040079530A KR20060030673A KR 20060030673 A KR20060030673 A KR 20060030673A KR 1020040079530 A KR1020040079530 A KR 1020040079530A KR 20040079530 A KR20040079530 A KR 20040079530A KR 20060030673 A KR20060030673 A KR 20060030673A
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electrolyte
specific gravity
ball
light
sensor
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KR1020040079530A
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Korean (ko)
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KR100618532B1 (en
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성재경
주정호
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주식회사 아트라스비엑스
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/484—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring electrolyte level, electrolyte density or electrolyte conductivity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

본 발명은 전해액 속에 잠겨지는 볼의 높낮이 변화를 광센서가 감지하여 전해액의 비중을 빠른 시간 내에 정확하게 감별할 수 있게 하는 납축전지의 전해액 비중 측정방법과 측정장치에 관한 것이다.The present invention relates to an electrolyte specific gravity measurement method and a measuring device of the lead-acid battery to detect the change in the height of the ball immersed in the electrolyte so that the specific gravity of the electrolyte can be accurately identified within a short time.

종래에 있어서 전해액의 비중을 측정하는 방법으로 전해액을 비중측정기에 떨어뜨러 비중측정기내의 색깔변화를 육안으로 판별하여 측정하도록 되어 있기 때문에 측정에 소요되는 시간이 많이 걸리고 별도의 장비가 필요하며 그 작업이 매우 까다로운 문제점이 있었던 바, 본 발명은 발광센서(21)와 수광센서(22)의 사이에 볼(3)을 위치시키고, 이를 전해액(6)에 담그었을 때 볼(3)과 전해액의 밀도차이로 볼(3)이 상승 또는 하강하는 것에 의해 발광센서(21)로부터 수광센서(22)에 집광되는 빛의 크기변화로 전해액(6)의 비중을 측정함으로써, 납축전지의 제조공정 내에서 신속하게 전해액의 비중상태를 검출할 수 있어 생산성을 대폭적으로 향상시키고시키는 효과와 아울러 소형화가 가능하여 전해액 주입구와 같은 협소한 곳을 통하여서도 전해액의 비중을 신속하게 측정할 수 있는 효과가 있는 것임.In the conventional method, the measurement of the specific gravity of the electrolyte is performed by dropping the electrolyte into the specific gravity meter and visually discriminating the color change in the specific gravity meter. Therefore, the measurement takes a lot of time and requires additional equipment. There was a very difficult problem, the present invention when the ball 3 is placed between the light emitting sensor 21 and the light receiving sensor 22, and the difference in density between the ball 3 and the electrolyte when it is immersed in the electrolyte (6) By measuring the specific gravity of the electrolyte solution 6 as the size of the light condensed from the light emitting sensor 21 to the light receiving sensor 22 as the furnace ball 3 is raised or lowered, it is possible to quickly The specific gravity state of the electrolyte can be detected, which greatly improves the productivity and can be downsized. Therefore, the specific gravity of the electrolyte can be reduced even through a narrow place such as an electrolyte inlet. It has the effect of being able to measure quickly.

Description

납축전지의 전해액 비중 측정방법 및 측정장치{Measuring methode and apparatus for specific gravity of electrolyte of storage battery} Measuring method and measuring apparatus for specific gravity of lead acid battery {Measuring methode and apparatus for specific gravity of electrolyte of storage battery}             

도 1 은 본 발명의 측정장치를 분리 도시한 사시도1 is a perspective view showing the separation of the measuring device of the present invention

도 2 는 본 발명의 측정장치가 결합된 상태를 도시한 단면도Figure 2 is a cross-sectional view showing a state in which the measuring device of the present invention is coupled

도 3 은 전해액이 없음을 판정한 상태를 도시한 단면도3 is a cross-sectional view showing a state where it is determined that there is no electrolyte solution.

도 4 는 전해액의 비중이 높음을 판정한 상태를 도시한 단면도4 is a cross-sectional view showing a state where it is determined that the specific gravity of the electrolyte is high.

도 5 는 전해액의 비중이 낮음을 판정한 상태를 도시한 단면도5 is a cross-sectional view showing a state where it is determined that the specific gravity of the electrolyte is low.

<도면의 주요 부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1. 광엠프 2. 몸체1. Optical amplifier 2. Body

3. 볼 4. 케이지3. ball 4. cage

5. 리미터 6. 전해액5. Limiter 6. Electrolyte

10. 디스플레이창 21. 발광센서 10. Display Window 21. Light Emitting Sensor

22. 수광센서 25. 광화이버22. Light receiving sensor 25. Optical fiber

본 발명은 납축전지의 전해액 비중 측정방법과 그 측정장치에 관한 것으로, 더욱 상세하게는 전해액 속에 잠겨지는 볼의 높낮이 변화를 광센서가 감지하여 전해액의 비중을 빠른 시간 내에 정확하게 감별할 수 있게 하는 납축전지의 전해액 비중 측정방법과 측정장치에 관한 것이다.The present invention relates to a method for measuring the specific gravity of an electrolyte in a lead acid battery and an apparatus for measuring the same, and more particularly, a lead sensor capable of accurately discriminating the specific gravity of an electrolyte in a short time by detecting a change in height of a ball immersed in an electrolyte. The present invention relates to a method for measuring specific gravity of an electrolyte solution of a storage battery and a measuring device.

일반적으로 납축전지의 전해액 비중은 납축전지의 충 방전상태와 밀접한 관계를 가짐에 따라 수시로 체크를 해주어야 하는데 그 비중의 측정이 대단히 어렵다.In general, the electrolyte specific gravity of the lead acid battery has a close relationship with the state of charge and discharge of the lead acid battery. Therefore, the specific gravity of the electrolyte is very difficult to measure.

종래에 있어서 전해액의 비중을 측정하는 방법으로 전해액 샘플을 비어커에 따른 후 비중계를 담가 눈금으로 측정하거나, 전해액을 비중측정기에 떨어뜨러 비중측정기내의 색깔변화를 육안으로 판별하여 측정하도록 되어 있기 때문에 측정에 소요되는 시간이 많이 걸리고 별도의 장비가 필요하며 그 작업이 매우 까다로운 문제점이 있다.In the conventional method, the specific gravity of the electrolyte is measured by measuring an electrolyte sample after the beaker and immersing the hydrometer in a graduated scale, or by dropping the electrolyte into a specific gravity meter and visually discriminating the color change in the specific gravity meter. It takes a lot of time and requires a separate equipment, the task is very difficult.

본 발명은 상기한 바와 같은 종래의 문제점을 해결하기 위한 것으로, 전해액에 잠겨지는 볼이 전해액의 비중에 따라 상하로 이동되는 높낮이 변화를 광센서가 감지하여 전해액의 비중과 전해액의 존재 유무를 빠른 시간 내에 정확하게 측정할 수 있게 한 납축전지의 전해액 비중 측정방법과 그 측정장치를 제공함에 목적이 있다.The present invention is to solve the conventional problems as described above, the optical sensor detects the height change that the ball is immersed in the electrolyte is moved up and down according to the specific gravity of the electrolyte solution to quickly determine the specific gravity of the electrolyte and the presence of the electrolyte It is an object of the present invention to provide a method for measuring the specific gravity of an electrolyte solution of a lead acid battery and a measuring apparatus thereof.

상기한 바와 같은 목적들을 달성하기 위한 본 발명은 전해액의 비중 상태에 따라 전해액에 잠긴 상태에서 상하 이동되는 볼의 일측에서 광을 발광시키고, 볼의 이면에서 볼을 통과한 광을 수광하여 볼의 현재위치를 감지함으로써 전해액의 비중과 전해액의 존재 유무를 측정하는 것에 특징을 둔 것이다.
The present invention for achieving the above object is to emit light from one side of the ball is moved up and down in the state immersed in the electrolyte according to the specific gravity state of the electrolyte, the light passing through the ball from the back of the ball to the current of the ball It is characterized by measuring the specific gravity of the electrolyte and the presence or absence of the electrolyte by sensing the position.

본 발명의 전해액 비중 측정방법은 액체 내에서의 고체는 액체와의 밀도 차에 의해 상승 또는 하강되는 고전물리학의 운동법칙과; 발광부로부터 발광되는 빛을 수광하는 수광부로 이루어지는 광센서의 작동원리 및 발광부로부터 발광되는 빛이 액체를 통과할 때 그 빛이 증폭되는 렌즈의 원리를 응용한 것이다.Electrolytic solution specific gravity measuring method of the present invention and the solid state in the liquid is the motion law of classical physics that rises or falls by the density difference with the liquid; The operation principle of the optical sensor comprising a light receiving unit for receiving the light emitted from the light emitting unit and the principle of the lens is amplified when the light emitted from the light emitting unit passes through the liquid.

즉, 발광센서(21)와 수광센서(22)의 사이에 볼(3)을 위치시키고, 이를 전해액(6)에 담그었을 때 볼(3)과 전해액의 밀도차이로 볼(3)이 상승 또는 하강하는 것에 의해 발광센서(21)로부터 수광센서(22)에 집광되는 빛의 크기변화로 전해액(6)의 비중을 측정할 수 있게 한 것으로, 본 발명에 의한 전해액의 비중 측정은 전해액의 비중이 양호하냐, 전해액의 비중이 불량하냐, 전해액이 존재하는냐를 측정하는 것이다.That is, when the ball 3 is positioned between the light emitting sensor 21 and the light receiving sensor 22, and the ball 3 is immersed in the electrolyte 6, the ball 3 rises due to the density difference between the ball 3 and the electrolyte. It is possible to measure the specific gravity of the electrolyte 6 by changing the size of the light condensed from the light emitting sensor 21 to the light receiving sensor 22 by descending. It is to measure whether it is good, the specific gravity of electrolyte solution is bad, or an electrolyte solution exists.

이하 첨부된 도면에 의거하여 본 발명의 측정방법과 그 장치를 설명하면 다음과 같다.Hereinafter, a measurement method and an apparatus thereof according to the present invention will be described with reference to the accompanying drawings.

첨부된 도면 도 1 은 본 발명의 측정장치를 분리 도시한 사시도이고, 도 2 는 본 발명의 측정장치가 결합된 상태를 도시한 단면도이다.1 is a perspective view showing a separate measuring device of the present invention, Figure 2 is a cross-sectional view showing a state in which the measuring device of the present invention is coupled.

도 1 및 도 2 에 도시되는 바와 같이, 본 발명의 측정장치는 광엠프(1)가 설치되는 몸체(2)와, 볼(3)이 삽입되어 안내되는 케이지(4)로 구성된다.As shown in Fig. 1 and Fig. 2, the measuring device of the present invention comprises a body 2 in which the optical amplifier 1 is installed, and a cage 4 in which the ball 3 is inserted and guided.

광엠프(1)는 광을 발진하고, 수광된 광의 크기를 연산하여 이를 표시하는 디스플레이창(10)를 포함하며, 몸체(2) 내부에는 광엠프(1)의 전기적인 신호에 의해 광을 발산시키는 발광센서(21)와, 발광센서로부터 발광된 빛을 받아 광엠프(1)에 전달하는 수광센서(22)가 설치된다. 또한 발광센서(21)로부터 발광된 빛을 측정부위를 거쳐 수광센서(22)에 전달하는 빛 전달매체인 광화이버(25)가 설치되어 구성된다.The optical amplifier 1 includes a display window 10 that oscillates light and calculates the size of the received light and displays the same, and the body 2 emits light by an electrical signal of the optical amplifier 1. The light emitting sensor 21 and the light receiving sensor 22 which receives the light emitted from the light emitting sensor and transmits the light to the optical amplifier 1 are installed. In addition, the optical fiber 25, which is a light transmission medium for transmitting the light emitted from the light emitting sensor 21 to the light receiving sensor 22 through the measuring portion is installed.

상기 케이지(4)는 몸체(2)의 하부에 결합 설치되고, 케이지(4)의 벽체에는 빛 전달매체인 광화이버(25)가 케이지(4)의 하단부 까지 삽입될 수 있도록 설치공(41)이 형성되며, 하부에는 전해액이 유입되는 통공(42)이 형성되어 구성된다.The cage 4 is coupled to the lower portion of the body 2, the installation hole 41 on the wall of the cage 4 so that the optical fiber 25, which is a light transmission medium, can be inserted to the lower end of the cage (4) Is formed, the lower portion is formed through the through-hole 42 through which the electrolyte flows.

그리고 케이지(4)의 내부에는 일단이 몸체(2)에 체결되는 리미터(5)가 설치되어 볼(3)이 측정범위이상으로 올라가는 것을 억제시킬 수 있게 구성된다.And the inside of the cage 4 is provided with a limiter 5, one end is fastened to the body 2 is configured to suppress the rise of the ball (3) beyond the measurement range.

이와 같이 구성되는 본 발명의 측정장치는 납축전지의 전해액(6) 투입구를 통하여 케이지(4)부위를 전해액에 담그게 되면 전해액(6)이 케이지(4)에 형성된 통공(42)을 통하여 볼(3)과 접촉되고, 볼(3)은 전해액(6)의 비중에 따라 상하로 움직이게 된다.In the measuring device of the present invention configured as described above, when the portion of the cage 4 is immersed in the electrolyte through the introduction hole of the electrolyte 6 of the lead acid battery, the electrolyte 6 is formed through the through hole 42 formed in the cage 4. In contact with 3), the ball 3 moves up and down according to the specific gravity of the electrolyte 6.

즉, 전해액(6)의 비중이 높게 되면 볼(3)은 상승되어 발광부(210)로부터 발 산되는 빛을 가리게 되고, 전해액(6)의 비중이 낮은 경우에는 볼(3)이 하강되어 발광부(210)로부터 발산되는 빛이 전해액(6)을 거져 수광부(220)에 수광되게 한다.That is, when the specific gravity of the electrolyte 6 is high, the ball 3 is raised to cover the light emitted from the light emitting unit 210. When the specific gravity of the electrolyte 6 is low, the ball 3 is lowered to emit light. Light emitted from the unit 210 passes through the electrolyte 6 to be received by the light receiving unit 220.

이와 같은 본 발명의 측정장치를 이용하여 납축전지의 전해액 비중을 측정하는 예를 설명하면 다음과 같다. Referring to the example of measuring the specific gravity of the electrolyte solution of the lead-acid battery using the measuring device of the present invention as follows.

볼(3)을 전해액에 담그지 않은 상태의 값을 "A"라하고, 볼(3)을 전해액(6)속에 담가 얻은 값을 "B"라고할 때 "A"의 값이 300이하이면 발광센서(21) 및 수광센서(22)가 오염되어 측정이 불가능한 상태임을 판정하고, "A"의 값이 3700 이상이면 측정할 수 있는 범위를 초과한 과잉상태임을 판정하여 "B"를 측정하지 않는 조건 하에서 도 3 은 전해액(6)이 없음을 판정한 상태이다. When the value of the state where the ball 3 is not immersed in the electrolyte is "A" and the value obtained by immersing the ball 3 in the electrolyte 6 is "B", the value of "A" is 300 or less. (21) and the light receiving sensor 22 are contaminated to determine that it is impossible to measure, and if the value of "A" is 3700 or more, it is determined that it is an excess state exceeding the measurable range and does not measure "B". 3 is a state where it is determined that there is no electrolyte solution 6.

즉, 측정 완료된 "B"의 값이 "A"값 보다 -20%∼+20% 인 경우에는 전해액(6)이 없음을 판정한다. 이와 같은 경우는 발광센서(21)로부터 발광되는 빛이 공기 중을 통과하여 수광센서(22)에 수광되는 값으로 이때 볼(3)을 자중에 의해 발광부(210)와 수광부(220)의 측정범위에서 밑으로 벗어나 있는 상태이다. That is, when the value of the measured "B" is -20%-+20% than the "A" value, it determines with no electrolyte solution 6. In this case, the light emitted from the light emitting sensor 21 passes through the air and is received by the light receiving sensor 22. At this time, the ball 3 is measured by the light emitting unit 210 and the light receiving unit 220 by its own weight. It is out of range.

도 4 는 전해액(6)의 비중이 높음을 판정한 것이다.4 determines that the specific gravity of the electrolyte solution 6 is high.

"B"의 값이 "A"값 보다 -20% 미만이 경우에는 전해액(6)의 비중이 볼(3) 보다 높다고 판정한 것으로, 이때 볼(3)은 전해액(6)의 부력에 의해 발광부(210)와 수광부(220)의 사이에 위치되어 발광부(210)로부터 발광되는 빛이 수광부(220)에 수광되지 못하게 차단시킨 상태이다.When the value of "B" is less than -20% than the value of "A", it is determined that the specific gravity of the electrolyte 6 is higher than that of the ball 3, wherein the ball 3 emits light by buoyancy of the electrolyte 6 Located between the unit 210 and the light receiving unit 220, the light emitted from the light emitting unit 210 is blocked from being received by the light receiving unit 220.

도 5 는 전해액(6)의 비중이 낮음을 판정한 것이다.5 determines that the specific gravity of the electrolyte solution 6 is low.

"B"의 값이 "A"값 보다 +20%을 초과하는 경우에는 전해액(6)의 비중이 볼(3) 보다 낮다고 판정한 것으로, 이때 볼(3)의 위치는 전해액 없음 상태와 같이 발광부(210)와 수광부(220)의 측정범위 밑으로 벗어난 상태이나, 발광부(210)와 수광부(220)의 사이에 전해액(6)이 존재하고 있어 발광부(210)로부터 발광되는 빛이 전해액(6)을 통과하면서 증폭되어 수광부(220)에 높은 크기의 광이 전달되는 것이다. When the value of "B" exceeds + 20% of the value "A", it is determined that the specific gravity of the electrolyte 6 is lower than that of the ball 3, and the position of the ball 3 is emitted as in the state of no electrolyte solution. Electrolysis solution 6 is present between the light emitting unit 210 and the light receiving unit 220, but the light is emitted from the light emitting unit 210. Amplified while passing through the (6) is a high magnitude of light is transmitted to the light receiving unit (220).

본 발명은 전술한 실시 예에 한정되지 않고 본 발명의 기술사상이 허용하는 범위 내에서 다양하게 변형하여 실시할 수가 있다. The present invention is not limited to the above embodiments, and various modifications can be made within the scope allowed by the technical idea of the present invention.

이상에서와 같이 본 발명에 따르면 납축전지의 제조공정 내에서 신속하게 전해액의 비중상태를 검출할 수 있어 생산성을 대폭적으로 향상시키고시키는 효과와 아울러 소형화가 가능하여 전해액 주입구와 같은 협소한 곳을 통하여서도 전해액의 비중을 신속하게 측정할 수 있는 효과가 있는 것이다.






As described above, according to the present invention, it is possible to detect the specific gravity state of the electrolyte quickly in the manufacturing process of the lead acid battery, thereby greatly improving the productivity and miniaturization, even through a narrow place such as an electrolyte inlet. There is an effect that can quickly measure the specific gravity of the electrolyte.






Claims (2)

발광센서(21)와 수광센서(22)의 사이에 볼(3)을 위치시키고, 이를 전해액(6)에 담그었을 때 볼(3)과 전해액의 밀도차이로 볼(3)이 상승 또는 하강하는 것에 의해 발광센서(21)로부터 수광센서(22)에 집광되는 빛의 크기변화로 전해액(6)의 비중을 측정하는 것을 특징으로 하는 납축전지의 전해액 비중 측정방법.When the ball 3 is positioned between the light emitting sensor 21 and the light receiving sensor 22, and the ball 3 is immersed in the electrolyte 6, the ball 3 rises or falls due to the density difference between the ball 3 and the electrolyte. The specific gravity of the electrolyte solution (6) by measuring the specific gravity of the light condensed from the light emitting sensor (21) to the light receiving sensor (22) by measuring the specific gravity of the electrolyte solution of the lead acid battery. 몸체(2) 내부에 광엠프(1)의 전기적인 신호에 의해 광을 발산하는 발광센서(21)와, 발광센서로부터 발광된 빛을 수광하는 수광센서(22)를 설치시키고, 발광센서(21)와 수광센서(22)의 사이에 광전달매체인 광화이버(25)를 설치시키며, 몸체(2)의 하부에 결합 설치되는 케이지(4)의 벽체에 광화이버(25)가 케이지(4)의 하단부 까지 삽입될 수 있도록 하는 설치공(41)을 형성시키고, 케이지의 하부에 전해액이 유입되는 통공(42)이 형성시키며, 케이지(4)의 내부에 일단이 몸체(2)에 체결되는 리미터(5)를 설치시켜 구성되는 것을 특징으로 하는 납축전지의 전해액 비중 측정장치.A light emitting sensor 21 for emitting light by an electrical signal of the optical amplifier 1 and a light receiving sensor 22 for receiving light emitted from the light emitting sensor are installed in the body 2, and the light emitting sensor 21 is provided. ) And an optical fiber 25, which is a photo-transmission medium, between the light receiving sensor 22 and the light receiving sensor 22, and the optical fiber 25 is mounted on the wall of the cage 4, which is coupled to the lower part of the body 2. Forming the installation hole 41 to be inserted up to the lower end of the, the through-hole 42 is formed to the electrolyte flowing into the lower portion of the cage, the limiter is fastened to the body 2, one end inside the cage (4) An electrolytic solution specific gravity measuring device of a lead acid battery, characterized by comprising (5).
KR1020040079530A 2004-10-06 2004-10-06 Measuring methode and apparatus for specific gravity of electrolyte of storage battery KR100618532B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100838164B1 (en) * 2004-12-16 2008-06-13 주식회사 엘지화학 Reference Electrode Probe for 3 Electrode System And Method for Measurement of Electrode Potential of Secondary Battery Using The Same
CN103175942A (en) * 2013-02-19 2013-06-26 厦门国麟科技有限公司 Device for automatically monitoring solution concentration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100838164B1 (en) * 2004-12-16 2008-06-13 주식회사 엘지화학 Reference Electrode Probe for 3 Electrode System And Method for Measurement of Electrode Potential of Secondary Battery Using The Same
CN103175942A (en) * 2013-02-19 2013-06-26 厦门国麟科技有限公司 Device for automatically monitoring solution concentration
CN103175942B (en) * 2013-02-19 2016-03-09 厦门国麟科技有限公司 A kind of solution concentration automated watch-keeping facility

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