KR102317056B1 - Intermittent immersed algae measurement system and control method thereof - Google Patents

Abstract

Disclosed are an intermittent immersed algae measurement system and a control method thereof. In the present invention, a sample is filled in a tank only during measurement, and when the measurement is completed, the sample is automatically drained from the tank, to prevent algae and suspended matter from being deposited on a sensor for measurement or on the bottom and inner surface of the tank, and to prevent the occurrence of errors.

Description

Intermittent immersion current measurement system and control method thereof

The present invention relates to an intermittent immersion algae measurement system and a method for controlling the same, and more particularly, an intermittent immersion algae measurement system in which a sample is filled in a water tank only during measurement and the sample is automatically drained from the water tank when the measurement is completed, and control thereof it's about how

Recently, the environment has rapidly deteriorated and the amount of harmful substances flowing into the water is increasing. Accordingly, the demand for securing safe water resources is spreading in society.

In particular, phytoplankton are water-quality microalgae that perform photosynthesis, and exist anywhere in the sea, rivers, lakes, etc. in an environment with an appropriate water temperature and light.

These algae exist in various species such as cyanobacteria or blue-green algae, which are bacterial prokaryotic algae, and eukaryotic green algae or diatoms.

In addition, when algae reproduce excessively in rivers or lakes and cause hydration, a characteristic odor is generated and a problem occurs in the water treatment process. Because it secretes substances, it causes health and environmental problems.

On the other hand, algae have different dominant species according to regions, environments and seasons, and in order to properly manage and monitor the water quality and environment of lakes or streams, it is necessary to measure and monitor the concentration of chlorophyll-a in each of these algae groups.

Typically, monitoring of aquatic microalgae is performed by qualitatively measuring the ratio of primary products generated from microalgae and dependence of environmental factors in order to measure the distribution of microalgae present in water.

In addition, monitoring can be made through non-ideal or suppressed conditions of the aquatic ecosystem.

In this case, the aquatic ecosystem may be an example of an abnormal or suppressed state, such as algal blooms, exposure to toxic substances, or oxygen deficit.

However, such algae monitoring has a problem in that it cannot be used for management or monitoring tasks in most cases due to the time difference between the collection of a certain amount of sample and the final analysis result obtained.

In addition, it is possible to obtain chlorophyll-a through a conversion formula after measuring the amount of fluorescence with a method of quantifying the concentration by HPLC and measuring the amount of fluorescence with a fluorometer. There is a problem that it cannot be used when monitoring.

In addition, a method of measuring without sample pretreatment has been developed for direct measurement or continuous measurement in the field, but the error of the measurement value is large to measure the amount of chlorophyll-a according to the diversity of the composition of the algae, so it is not applied properly in the field. it is not possible.

On the other hand, when monitoring is performed while the sample is always filled in the water tank, there is a problem in that algae and suspended particles present in the sample are deposited on the sensor or probe for measurement, thereby causing a significant error in the measurement value.

In addition, there is a problem in that algae and suspended particles present in the sample are deposited on the bottom and inner surfaces of the water tank and, when irradiated with a light source for measurement, measurement errors occur due to fluorescence emitted from the algae and suspended particles deposited on the inner surface of the water tank. .

In addition, in order to prevent the occurrence of errors in the measurement values due to the deposition of algae and suspended particles, the user washes the sample tank once every 1 to 3 days depending on the turbidity of the sample and the concentration of the algae. must be cleaned, and for this purpose, separate washing devices must be installed or a device capable of automatically elevating the sensor itself from the water must be installed, which increases and complicates the configuration of the monitoring system.

In addition, as a permanently immersed measuring instrument is immersed in water for a long period of time, there is a high possibility of moisture inside the sensor due to the temperature of the sample, and there is a possibility that minute water ingress may occur inside the sensor due to the aging of the equipment. There is a problem that malfunctions and failures may occur due to a short circuit.

Korea Patent Publication No. 10-1224855 (Title of the invention: current measuring device using a multi-wavelength light source)

In order to solve this problem, an object of the present invention is to provide an intermittent immersion type algae measurement system in which a sample is filled in a tank only during measurement and the sample is automatically drained from the tank when the measurement is completed, and a control method thereof.

In order to achieve the above object, an embodiment of the present invention provides an intermittent immersion algae measurement system, comprising: a water tank having a storage space to be filled with a sample including algae supplied from the outside; When the sample is filled in the water tank, at least a part of the sample is immersed in the sample, the measurement unit outputs light having one or more preset wavelengths to the sample, and detects fluorescence light generated by the algae by the output light; a controller for controlling the on/off operation of the measuring unit and analyzing the fluorescence light sensed by the measuring unit, and controlling the operation of the control valve so that the sample is filled in the water tank or the sample filled in the water tank is drained; and a control valve that performs an opening/closing operation according to an open signal or a closing signal of the control unit, wherein the control unit outputs a closing signal of the control valve when the measurement of the measuring unit starts, so that the sample is placed in the water tank while the measuring unit is measuring When the measurement of the measuring unit is finished, an open signal of the control valve is output to drain the sample filled in the water tank, and the sample supplied to the water tank is bypassed without filling the water tank and is drained.

In addition, the water tank according to the embodiment is made to be tapered from the top to the bottom on the inside forming a hollow inclined surface; a drain hole installed at the lower end of the inclined surface; an opening/closing unit operable to selectively open or close the drain port in conjunction with the operation of the control valve; an inlet connected to the inside of the water tank at the lower part of the water tank to supply a sample; and a drain port installed on the upper part of the water tank and operated to drain when the sample filled in the water tank reaches the full water level, wherein the sample supplied to the inlet is filled in the water tank according to the operation of the opening/closing part or drained through the drain hole characterized.

In addition, the water tank according to the embodiment further includes a washing water inlet installed at the upper portion to supply washing water to the inside of the water tank, wherein the washing water inlet is opened and closed according to the operation of the control valve 1.

In addition, the washing water supplied to the washing water inlet according to the embodiment moves from the upper part to the lower part of the water tank along the inclined surface, and it is characterized in that it moves while forming a spiral flow path along the inside of the water tank.

In addition, the measuring unit according to the embodiment comprises: a light emitting unit for outputting light of a preset wavelength according to an on/off operation control signal output from the control unit; and a light receiving unit for detecting and outputting fluorescent light generated by algae by the output light.

In addition, the measuring unit according to the embodiment includes a first optical filter installed in the light emitting unit to remove interference of a specific wavelength generated from the irradiated light; and a second optical filter installed in the light receiving unit and operated to transmit only the fluorescence wavelength generated by the algae.

In addition, the control unit according to the embodiment is characterized in that the measurement is performed according to a preset measurement period or an arbitrary measurement period set by the user.

In addition, an embodiment of the present invention is a control method of an intermittent immersion type current measurement system, a) the sample supplied to the inlet is bypassed to the drain port and drained, and when a measurement start signal is input, the control unit outputs a closing signal to the control valve controlling the sample drained to the drain hole to be filled in the water tank; b) when the sample is filled in the water tank, the measuring unit at least partially immersed in the sample outputs light having one or more preset wavelengths, and performing measurement by detecting the fluorescence light generated by the algae by the output light ; and c) when the measurement is finished, the control unit analyzes the fluorescence light detected by the measurement unit, outputs an open signal to the control valve so that the sample filled in the water tank is drained through the drain hole, and the sample supplied to the inlet is also the drain hole Including; controlling to be bypassed through the drain.

In addition, the embodiment further includes: d) when the sample is drained through the drain port, the control unit outputs an open signal to the control valve 1 to supply washing water to the inside of the water tank through the washing water inlet for washing; characterized.

In addition, the water tank according to the embodiment is characterized in that the sample is filled only during measurement.

In addition, when the sample filled in the water tank according to the embodiment reaches the full water level, a part of the sample is drained through the Yeosu port to maintain a constant water level.

The present invention has an advantage in that the sample is filled in the tank only during measurement and when the measurement is completed, the sample is automatically drained from the tank to prevent algae and suspended matter from being deposited on the measurement unit.

In addition, the present invention can configure a monitoring system without a separate cleaning device, and by installing only a light emitting unit and a light receiving unit in the measuring unit, the size of the measuring unit can be minimized, and as a result, it can be easily applied to small measuring stations and mobile measuring equipment. There are advantages to using it.

In addition, the present invention has the advantage of preventing the occurrence of measurement errors by preventing particles of algae and suspended matter from being deposited on the bottom and inner surfaces of the tank.

In addition, the present invention is configured so that washing water flows into the top of the conical water tank to form a spiral flow path along the inside of the water tank, and the washing is performed. There are advantages to avoiding this.

In addition, the present invention enables the user to arbitrarily adjust the measurement time interval of the algae, thereby preventing unnecessary measurement, reducing the immersion time of the sensor by adjusting the appropriate measurement period, and maintaining the same as cleaning the sensor. It has the advantage of extending the lifespan by extending the maintenance period.

1 is an exemplary diagram schematically showing an intermittent immersion type current measurement system according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing a water tank of the intermittent immersion type current measurement system according to the embodiment of Figure 1;
Figure 3 is a block diagram showing the configuration of the intermittent immersion type current measurement system according to the embodiment of Figure 1;
Figure 4 is an exploded perspective view showing a measuring unit of the intermittent immersion current measurement system according to the embodiment of Figure 1;
5 is a flowchart illustrating a control method of an intermittent immersion current measurement system according to an embodiment of the present invention.

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

Prior to describing the specific contents for carrying out the present invention, it should be noted that components not directly related to the technical gist of the present invention are omitted within the scope of not disturbing the technical gist of the present invention.

In addition, the terms or words used in the present specification and claims have meanings and concepts consistent with the technical idea of the invention based on the principle that the inventor can define the concept of an appropriate term to best describe his invention. should be interpreted as

In the present specification, the expression that a part "includes" a certain element does not exclude other elements, but means that other elements may be further included.

Also, terms such as “… unit”, “… group”, and “… module” mean a unit that processes at least one function or operation, which may be divided into hardware, software, or a combination of the two.

In addition, the term "at least one" is defined as a term including the singular and the plural, and even if the term "at least one" does not exist, each element may exist in the singular or plural, and may mean the singular or plural. will be self-evident.

In addition, that each component is provided in singular or plural may be changed according to an embodiment.

Hereinafter, a preferred embodiment of an intermittent immersion current measurement system and a control method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is an exemplary view schematically showing an immersion-type algae measurement system according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a water tank of the immersion-type algae measurement system according to the embodiment of Figure 1, Figure 3 is It is a block diagram showing the configuration of an immersion-type algae measurement system according to an embodiment, and FIG. 4 is an exploded perspective view showing a measurement unit of the immersion-type algae measurement system according to the embodiment of FIG. 1 .

1 to 4, in the submerged algae measurement system according to an embodiment of the present invention, the sample is filled in the tank only during measurement, and when the measurement is completed, the sample is automatically drained from the tank to measure algae and suspended matter It may be configured to include a water tank 110 , a measuring unit 120 , a control unit 130 , a control valve 140 , and a control valve 1 ( 150 ) to prevent deposition in the unit.

The water tank 110 is a configuration in which a storage space is formed so that a sample including algae supplied from the outside is filled, and a hollow may be formed inside.

In addition, the water tank 110 may have an inclined surface 111 that is tapered from the top to the bottom on the inside.

Through the configuration of the inclined surface 111, the overall shape of the cross-section of the water tank 110 may be a conical shape.

In addition, the conical shape of the inclined surface 111 enables complete drainage when the sample filled in the water tank 110 is drained, and when draining, algae or suspended substances are placed at the bottom of the water tank 110 through natural washing by the sample. It can prevent settling.

In addition, the conical shape using the inclined surface 111 prevents the direct reflected light reflected from the bottom of the water tank 110 from flowing into the measurement unit 120 when the measurement unit 120 irradiates the measurement light, thereby causing a measurement error. can reduce the occurrence of

In addition, the water tank 110 may have a drain hole 112 installed on the lower bottom surface, and the drain hole 112 is connected to the lower end of the inclined surface 111 formed in the water tank 110 and filled in the water tank 110 . Allow the sample to be drained to the outside of the water tank (110).

In addition, the water tank 110 may include an opening/closing part 113 which operates to selectively open or close the drain port 112 in association with the operation of the control valve 140 .

In addition, the water tank 110 may be provided with an inlet 114 penetrating from the outside to the inside of the water tank 110 in the lower portion.

The inlet 114 is configured to supply a sample to the inside of the water tank 110 , and when the opening/closing part 113 is maintained in a closed state, the sample supplied through the inlet 114 is supplied to the inside of the water tank 110 . and is filled in the water tank 110 .

That is, the sample supplied through the inlet 114 is filled in the upper direction from the lower portion of the water tank 110 .

In addition, the sample supplied through the inlet 114 is drained through the drain 112 when the opening/closing part 113 is maintained in an open state, so that the sample supplied through the inlet 114 is not filled in the water tank 110 .

Accordingly, the sample supplied to the inlet 114 may be filled in the water tank 110 or drained through the drain 112 according to the operation of the opening/closing unit 113 .

In addition, the water tank 110 may be provided with a drain port 115 installed at the upper portion and operated to drain the overflowed sample from the water tank 110 when the sample filled from the lower portion of the water tank 110 reaches the full water level.

The Yeosu port 115 prevents the sample filled in the water tank 110 from overflowing, and allows the sample to maintain a constant water level.

In addition, the water tank 110 may be provided with a washing water inlet 116 installed at the upper or upper part to supply washing water to the inside of the water tank 110 .

The washing water inlet 116 allows the washing water to be selectively supplied to the water tank 110 by opening or closing the control valve 1 150 according to the operation control signal of the controller 130 .

In addition, the washing water supplied through the washing water inlet 116 moves from the upper part to the lower part of the water tank 110 along the inclined surface 111 of the water tank 110 , and at this time, a spiral flow path along the inner surface of the water tank 110 . By forming and moving, it is possible to prevent particles of algae or suspended matter from being deposited in the inside of the water tank 110 .

When the sample is filled in the tank 110, the measuring unit 120 is immersed in at least a portion of the sample, and outputs light having one or more wavelengths preset to the sample, and the algae is generated by the output light. As a configuration for sensing fluorescent light, it may include a light emitting unit 121 and a light receiving unit 122 .

The light emitting unit 121 is configured to output light of a preset wavelength according to an on/off operation control signal of the measuring unit 120 output from the control unit 130, and at least one of blue, red, green, and orange light It may be composed of an LED that outputs

The blue-emitting LED emits light of a blue wavelength of 470 nm, the red-emitting LED emits light of a red wavelength of 620 nm, and the green-emitting LED emits light of a green wavelength of 520 nm, and orange The LED emitting light emits light of 590 nm, which is an orange wavelength, and the wavelength of light irradiated to the algae preferably has at least two or more colors of blue, red, green, and orange.

The light receiving unit 122 receives and senses the emitted fluorescent light when the bird performs photosynthesis using the light output from the light emitting unit 121 and emits the remaining energy as fluorescent light, and transmits the sensed signal to the control unit 130 ) is provided.

In addition, the measurement unit 120 is installed at the output end of the light emitting unit 121 to remove, for example, a first optical filter 123 that removes a wavelength of 680 nm or more in order to remove interference of a specific wavelength that is minutely generated from the irradiated light. ) can be installed.

In addition, the measurement unit 120 may be installed at the input end of the light receiving unit 122 , and a second optical filter 124 may be installed so that only a wavelength of fluorescence generated from algae, for example, a wavelength of 680 nm is transmitted.

The control unit 130 controls the on/off operation of the measurement unit 120 and analyzes the fluorescent light sensed by the measurement unit 120 .

Also, the control unit 130 outputs a control signal for controlling the operation of the control valve 140 so that the sample is filled in the water tank 110 or the sample filled in the water tank 110 is drained.

That is, when the measurement of the measurement unit 120 starts, the control unit 130 outputs a closing signal to the control valve 140 so that the sample supplied through the inlet 114 is filled in the water tank 110 , and the measurement is performed. While the unit 120 measures, the sample can maintain a constant water level in the water tank 110 .

In addition, when the measurement by the measurement unit 120 is finished, the control unit 130 outputs an open signal to the control valve 140 so that the sample filled in the water tank 110 is drained through the drain hole 112 .

In addition, the control unit 130 controls the output of the open signal to the control valve 140 so that the sample supplied through the inlet 114 is bypassed without filling the water tank 110 until the measurement of the measuring unit 120 starts. keep

In addition, the control unit 130 can prevent unnecessary measurement by controlling the measurement to be performed according to a preset measurement period or an arbitrary measurement period set by the user, and the measurement unit 120 can be controlled by adjusting the appropriate measurement period. Reduced soaking time allows for increased maintenance and durability for cleaning.

Therefore, the control unit 130 can prevent the sample from being automatically drained from the water tank 110 when the sample is filled in the water tank 110 only during measurement and the measurement is completed, so that algae and suspended matter are deposited on the measurement unit. let it be

The control valve 140 performs an opening/closing operation according to an open signal or a closing signal of the control unit 130 , and the opening/closing unit 113 selectively opens or opens the drain port 112 in conjunction with the operation of the control valve 140 . Make sure it is closed.

Next, a control method of the intermittent immersion type current measurement system according to an embodiment of the present invention will be described.

5 is a flowchart illustrating a control method of an intermittent immersion current measurement system according to an embodiment of the present invention.

1 to 5 , in the control method of the intermittent immersion current measurement system according to an embodiment of the present invention, before the measurement starts, the control unit 130 controls the sample supplied to the inlet 114 through the drain 112 ) to bypass and drain.

In addition, the controller 130 controls the measurement to be performed according to a preset measurement period or an arbitrary measurement period set by the user.

When the measurement start signal is continuously input and the measurement starts (S100), the control unit 130 outputs a closing signal to the control valve 140 (S200) so that the sample drained to the drain port 112 is not filled in the tank 110. works so as to

After performing the step S200 , the control valve 140 maintains the closed state so that the sample can maintain a constant water level in the water tank 110 while the measurement unit 120 measures.

At this time, when the sample filled in the water tank 110 reaches the full water level, a portion of the sample is drained through the water port 115 installed in the water tank 110 to maintain a constant water level.

In addition, when the sample is filled in the water tank 110, the control unit 130 outputs light having one or more wavelengths set in advance by the measuring unit 120 immersed in the sample at least partially, and the algae is caused by the output light. The measurement can be performed by detecting the generated fluorescence light.

Subsequently, the control unit 130 determines whether the measurement by the measurement unit 120 is finished ( S300 ).

As a result of the determination in step S300, if the measurement unit 120 is measuring, the step S200 is maintained.

In addition, as a result of the determination in step S300, if the measurement of the measurement unit 120 is finished, the control unit 130 outputs an open signal to the control valve 140 (S400) so that the sample filled in the water tank 110 is drained (S400). 112) to drain.

At this time, even if the sample filled in the water tank 110 is completely drained, the control unit 130 does not fill the tank 110 with the sample supplied through the inlet 114 until the measurement by the measurement unit 120 starts again. By outputting an open signal to the control valve 140 so as to be bypassed, the sample is not filled in the water tank 110 .

Subsequently, when the sample is drained through the drain port 112 , the control unit 130 outputs an open signal to the control valve 1 150 to supply the washing water to the inside of the water tank 110 through the washing water inlet 116 . Thus, the water tank 110 is washed (S500).

Therefore, the sample is filled in the tank only during measurement, and when the measurement is completed, the sample is automatically drained from the tank, thereby preventing algae and suspended matter from being deposited on the measurement part.

In addition, the monitoring system can be configured without a separate cleaning device, and by installing only the light emitting part and the light receiving part in the measuring part, the size of the measuring part can be minimized. .

In addition, it is possible to prevent the occurrence of measurement errors by preventing particles of algae and suspended matter from being deposited on the bottom and inner surfaces of the tank.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

In addition, the reference numbers described in the claims of the present invention are only described for clarity and convenience of description, and are not limited thereto, and in the process of describing the embodiment, the thickness of the lines shown in the drawings or the size of components, etc. may be exaggerated for clarity and convenience of explanation.

In addition, the above-mentioned terms are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of the user or operator, so the interpretation of these terms should be made based on the content throughout this specification. .

In addition, even if it is not explicitly shown or described, a person of ordinary skill in the art to which the present invention pertains can make various modifications including the technical idea according to the present invention from the description of the present invention. Obviously, this still falls within the scope of the present invention.

In addition, the above embodiments described with reference to the accompanying drawings have been described for the purpose of explaining the present invention, and the scope of the present invention is not limited to these embodiments.

100: measuring system
110: water tank
111: slope
112: drain hole
113: opening and closing part
114: inlet
115 : Yeosu-gu
116: washing water inlet
120: measurement unit
121: light emitting part
122: light receiving unit
123: first optical filter
124: second optical filter
130: control unit
140: control valve
150: control valve 1

Claims (11)

a water tank 110 having a storage space to be filled with a sample including algae supplied from the outside;
When the sample is filled in the water tank 110, at least a part of the sample is immersed in the sample, and light having one or more preset wavelengths is output to the sample, and the fluorescence light generated by the algae is detected by the output light. part 120;
The on/off operation control of the measurement unit 120 and the fluorescence light sensed by the measurement unit 120 are analyzed so that the sample is filled in the water tank 110 or the sample filled in the water tank 110 is drained. a control unit 130 for controlling the operation of the control valve 140; and
and a control valve 140 that performs an opening/closing operation according to an opening signal or a closing signal of the control unit 130;
The water tank 110 is made to be tapered from the top to the bottom inside the hollow formed,
When the measurement light is irradiated from the measuring unit 120 , the direct reflected light reflected from the bottom of the water tank 110 is prevented from flowing into the measuring unit 120 , thereby reducing the occurrence of measurement errors, and the water tank 110 . ) inclined surface 111 made to form a spiral flow path for washing water moving from the top to the bottom along the inside;
a drain hole 112 installed at the lower end of the inclined surface 111;
an opening/closing part 113 which operates to selectively open or close the drain port 112 in conjunction with the operation of the control valve 140;
an inlet 114 connected to the inside of the water tank 110 at the lower portion of the water tank 110 to supply a sample;
Yeosu port 115 installed on the upper part of the water tank 110 and operated to drain when the sample filled in the water tank 110 reaches the full water level; and
A washing water inlet 116 installed on the upper portion of the water tank 110 and opened and closed according to the operation of the control valve 1 150 to supply the washing water to the inside of the water tank 110;
The control unit 130 is configured such that the sample supplied to the inlet 114 is filled in the water tank 110 or drained through the drain 112 according to the operation of the opening and closing unit 113,
Before the measurement of the measurement unit 120 starts, an open signal is output to the control valve 140 to bypass the sample supplied to the inlet 114 to be drained into the drain port 112 , and the measurement unit 120 . When the measurement of the control valve 140 is output, the sample is filled in the tank 110 while the measurement unit 120 is measuring, and when the measurement of the measurement unit 120 is finished, the control valve The open signal of 140 is output so that the sample filled in the water tank 110 is drained, but the sample supplied to the inlet 114 does not fill the water tank 110 but is bypassed to the drain port 112 and drained intermittently. Intermittent immersion type algae measurement system, characterized in that controlled by. delete delete delete The method of claim 1,
The measuring unit 120 includes: a light emitting unit 121 for outputting light of a preset wavelength according to an on/off operation control signal output from the control unit; and
Intermittent immersion current measurement system comprising a; 6. The method of claim 5,
The measuring unit 120 includes a first optical filter 123 installed in the light emitting unit 121 to remove interference of a specific wavelength generated from the irradiated light; and
The intermittent immersion algae measurement system further comprising a; a second optical filter 124 installed in the light receiving unit 122 and operated to transmit only the fluorescence wavelength generated from the algae. The method of claim 1,
The control unit 130 is an intermittent immersion type current measurement system, characterized in that the measurement is performed according to a preset measurement period or an arbitrary measurement period set by the user. a) The control unit 130 outputs an open signal to the control valve 140 until the measurement starts so that the sample supplied to the inlet 114 is bypassed to the drain port 112 to be drained, and when the measurement start signal is input controlling, by the control unit 130, a closing signal to the control valve 140 to fill the water tank 110 with the sample drained into the drain port 112;
b) When the sample is filled in the water tank 110, the measuring unit 120 immersed in at least part of the sample outputs light having one or more preset wavelengths, and fluorescence light generated by the output light sensing and performing a measurement;
c) As the measurement is completed, the control unit 130 analyzes the fluorescence light detected by the measurement unit 120 , and uses the control valve 140 to drain the sample filled in the water tank 110 through the drain hole 112 . outputting an open signal and controlling the sample supplied to the inlet 114 to be bypassed and drained through the drain port 112; and
d) When the sample is drained through the drain port 112, the control unit 130 outputs an open signal to the control valve 1 150 and supplies the washing water to the inside of the water tank 110 through the washing water inlet 116. washing; including;
The water tank 110 is intermittently filled only when the sample is measured, and the water tank 110 forms an inclined surface 111 inside the hollow water tank 110 to taper from the top to the bottom. When the measurement light is irradiated from the measuring unit 120 in step b), the direct reflected light reflected from the bottom of the water tank 110 is prevented from flowing into the measuring unit 120 to reduce the occurrence of measurement errors, , d) The control method of the intermittent immersion type algae measurement system, characterized in that the washing water supplied in step moves while forming a spiral flow path from the top to the bottom along the inside of the water tank (110). delete delete 9. The method of claim 8,
When the sample filled in the water tank 110 reaches the full water level, a part of the sample is drained through the Yeosu port 115 to maintain a constant water level.

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