KR101526217B1 - On-Line Smart DO Analyzer - Google Patents
On-Line Smart DO Analyzer Download PDFInfo
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- KR101526217B1 KR101526217B1 KR1020140169469A KR20140169469A KR101526217B1 KR 101526217 B1 KR101526217 B1 KR 101526217B1 KR 1020140169469 A KR1020140169469 A KR 1020140169469A KR 20140169469 A KR20140169469 A KR 20140169469A KR 101526217 B1 KR101526217 B1 KR 101526217B1
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- dissolved oxygen
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- unit
- sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/48—Systems using polarography, i.e. measuring changes in current under a slowly-varying voltage
-
- 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—Water biological or chemical oxygen demand (BOD or COD)
Abstract
Description
The present invention relates to a dissolved oxygen analyzer, and more particularly, it is possible to apply various types of sensors when measuring dissolved oxygen of a water quality used in a power plant or various fields, and to compensate for various interference affecting measurement, To an on-site smart dissolved oxygen analyzer.
In general, dissolved oxygen is the amount of oxygen dissolved in water, which is supplied by oxygen in the air. The amount of dissolved oxygen depends on the temperature and the air pressure. The dissolved oxygen (DO) of pure water at 20 ° C under atmospheric pressure is about 9 ppm Which increases with decreasing temperature to about 13 ppm at 4 ° C. Dissolved oxygen (DO) decreases with soiled water because it is consumed by biological respiration and oxidation of dissolved substances.
On the other hand, when birds and the like reproduce, DO increases due to photosynthesis, which may lead to supersaturation. In the activated sludge process in sewage treatment, aeration is performed to promote the activity of microorganisms, so that dissolved oxygen (DO) is supplied. In the boiler water, dissolved oxygen (DO) is removed in order to prevent corrosion.
The concentration of dissolved oxygen depends on the temperature of the water, the pressure and the concentration of impurities. Most of the water in nature can stay in a calm state. However, depending on environmental conditions, Turbulence occurs, oxygen in the atmosphere melts into the water. The transfer of oxygen in the atmosphere into the water is called propagation.
The solubility of oxygen increases as the atmospheric pressure is higher and the water temperature is lower and the dissolved salt concentration is lower, but it does not dissolve in water to such an extent that only a maximum of 9.092 mg is dissolved in 1 L of pure water at 20 ° C.
In addition, the dissolved oxygen amount shows a low value when an oxygen consuming substance such as an organic substance exists in water. On the other hand, the cleaner the water, the higher the chance of contact with air such as a rapids river, or the greater the oxygen assimilation of algae and aquatic plants, the higher the dissolved oxygen amount.
Water temperature (℃)
Saturated dissolved oxygen (mg / L)
5
10
15
20
25
30
35
40
12.770
11.288
10.084
9.092
8.263
7.559
6.950
6.412
The importance of dissolved oxygen is that dissolved oxygen in liquid wastes is a factor that determines whether the biological change is caused by aerobic microorganisms or by anaerobic microorganisms. The former uses free oxygen to oxidize the organic and inorganic materials to a harmless end product, while the latter causes such changes through the reduction of certain inorganic salts such as sulfate, which may sometimes be very detrimental to the final product.
Because these two types of microorganisms are universally present in nature, it is very important to maintain favorable conditions for aerobic microorganisms (aerobic conditions), otherwise, anaerobic microorganisms will grow and turn into nuisance conditions. Therefore, the measurement of dissolved oxygen is very important in keeping the aerobic treatment process for aerobic treatment of the pollutant-infused natural water, domestic sewage and industrial wastewater.
In addition, the measured value of dissolved oxygen is also used for various purposes and is one of the most important test items in environmental engineering. Much of what is required in controlling river pollution is to maintain conditions favorable to the growth and reproduction of fishes and other aquatic organisms. In other words, the presence of dissolved oxygen should be sufficient to ensure that aquatic organisms are always healthy.
In addition, the measurement of dissolved oxygen is the basis for measuring biological oxygen demand (BOD). Therefore, it is the most important measure used to evaluate the intensity of contamination of domestic sewage and industrial wastewater. The rate of biological oxidation reactions also measures the residual dissolved oxygen in the system over several time intervals. Since the aerobic treatment process is all dependent on dissolved oxygen, the detection test of dissolved oxygen is essential to control the aeration rate and prevent excessive air supply to maintain a precisely aerobic condition by supplying an appropriate amount of air.
This method of measuring dissolved oxygen can roughly divide dissolved oxygen measurement technology into two types. One is a light-based measurement method, usually called a light-emitting type, and the other is a Clark electrochemical or membrane electrode type. There are also a few sub-categories below. For example, there are two types of optical sensors, both of which measure luminescence (affected by oxygen), but one measures the duration of luminescence while the other measures the intensity of luminescence Clark electrochemical sensors detect polarographic and galvanic.
First, a galvanic measurement method spontaneously generates a potential difference between a cathode and an anode by an electrochemical displacement in a measurement cell. This is sufficient to reduce oxygen molecules at the anode and is sufficient to cause a corresponding oxidation reaction at the cathode. The potential difference between the cathode and the anode is proportional to the oxygen concentration in the electrolyte. The galvanic measurement cell spontaneously undergoes polarization. In other words, it means that you can use it immediately when the power is connected.
In the polarographic measurement method, an external polarization voltage must be supplied because the potential difference generated between the cathode and the anode is not sufficient to reduce oxygen molecules at the anode, and a current proportional to the oxygen concentration in the electrolyte after the external voltage is supplied Is measured. Polarization time is required because a stable polarization voltage is not generated spontaneously between the cathode and the anode. Depending on the sensor type, it takes about 2 hours. If the battery is not buffered and power is supplied, it can be used immediately after the polarization time.
The dissolved oxygen measurement is performed by connecting the dissolved oxygen sensor to the dissolved oxygen meter, and then, when measured by a galvanic or polarographic method, receives an electrical signal from the probe and converts the analog signal into a digital signal.
At this time, the measurement signal of the dissolved oxygen sensor transmitted to the dissolved oxygen meter is proportional to the amount of oxygen passing through the membrane, and when the oxygen is passed through the membrane, the electric signal (current) read by the probe increases, Indicates that the signal becomes larger when the oxygen concentration is increased, and the signal becomes smaller when the oxygen concentration is decreased.
The dissolved oxygen meter according to the prior art displays only the dissolved oxygen measurement value of the water quality by using only the dissolved oxygen sensor. Therefore, since there is no pressure compensation function that affects the dissolved oxygen amount, it is affected by the atmospheric pressure depending on the measurement environment, There is a problem that the oxygen amount can not be measured.
In addition, the dissolved oxygen meter according to the related art has a problem in that accurate measurement can not be performed because there is no function to compensate for the decrease in oxygen solubility when the salinity is affected by the salinity of water when measuring the dissolved oxygen concentration.
In addition, the dissolved oxygen meter according to the prior art does not have a function of determining the end point of polarization or the polarization even if the dissolved oxygen sensor is operated by the polarographic method, even if a constant voltage circuit for polarizing the sensor is provided. There is a problem in that there is a limitation in use that can not be confirmed accurately.
In addition, when the dissolved oxygen sensor according to the related art is a diaphragm type, the diaphragm needs to be replaced at regular intervals according to the contamination or the lifetime. However, since the diaphragm has no function to detect the replacement period of the diaphragm, There has been a problem in that it is inconvenient to determine the timing of replacement of the measurement value by identifying and observing the symptoms of the hunting phenomenon.
Since the dissolved oxygen meter according to the related art consumes oxygen during measurement when the dissolved oxygen sensor is an electrochemical sensor, there is no interference compensating function in which the measured output is abnormally lowered unless oxygen is supplied through the sample movement, The reliability of the measurement is lowered.
This makes it possible to compensate for the temperature, air pressure, altitude, salinity, and interference factors that affect the dissolved oxygen when measuring the dissolved oxygen amount by using the dissolved oxygen sensor having different types and measurement characteristics of the sensor, And an improved dissolved oxygen analyzer is required to prevent the measurement from being influenced by notifying the replacement period of the sensor.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the problems of the prior art as described above, and it is an object of the present invention to provide an on-site smart meter capable of compensating for salinity, atmospheric pressure and altitude as well as temperature of a measurement site, It is an object of the present invention to provide a dissolved oxygen analyzer.
Another object of the present invention is to display the display state in the normal operation state and the display state in the abnormal operation state through the screen, the lamp, and the sound in all the processes related to the measurement so that the user can easily grasp it.
In addition, another object of the present invention is to compensate for various settings related to electrodes and measurement by an automatic method or a manual method.
Another object of the present invention is to make it easy for domestic or foreign people to use the language and the unit, and to enable the disabled person to use voice support or braille.
Another object of the present invention is to enable real-time communication with a control center for on-site control and control, in which various modes can be performed through a combination operation of limited buttons.
According to an aspect of the present invention, there is provided a dissolved oxygen analyzer for measuring dissolved oxygen concentrations of various kinds of water quality, the dissolved oxygen analyzer comprising: A plurality of output channels are formed, and a dissolved oxygen sensor connected to the input channel, a dissolved oxygen concentration, an electric conductivity, a BOD measurement value display, a temperature display, a salinity measurement value display, an air pressure value and an altitude value display, Display, calibration display, and sensor replacement notification are displayed, and the steady state and abnormal state are displayed differently by the inversion / non-reversal of the processor, and the measurement slope abnormality or the hunting phenomenon occurs in the measurement, If the signal from the cleaning output terminal is used to operate a separate cleaning device through the control of the processor, A lamp unit is formed in the vicinity of the display unit to indicate a steady state, an abnormal state, an upper / lower limit value, a connection state of a dissolved oxygen sensor, an error indication of electrode connection, Around the negative part, the measurement unit is set, the upper and lower limits of the measurement range are set and calibration setting, the measurement interference factor compensation setting, the cleaning setting, the plural relay operation for setting the polarization, the calibration operation of the dissolved oxygen sensor, The present invention provides an on-site Smart Dissolved Oxygen Analyzer which is configured to display measured values of dissolved oxygen concentrations of water used in power plants and various fields.
As described above, the present invention can compensate for not only the temperature at the measurement site but also the salinity, atmospheric pressure and altitude during the measurement of dissolved oxygen of a water quality used in a power plant or various fields, thereby improving the reliability and precision of measurement.
The display state in the normal operation state and the display state in the abnormal operation state are displayed on the screen, the lamp, and the sound in all the processes related to the measurement, so that the user can easily grasp the display state.
In addition, there is an effect that the various settings related to the electrode and the measurement can be compensated by an automatic method or a manual method.
In addition, it is displayed in various languages or units, so that it can be easily used by domestic or foreign people, and voice support or braille is formed, so that it can be used by persons with disabilities.
In addition, a combination of limited button operations allows for various modes of operation, enabling real-time communication with the on-site analytical control station and the control station.
1 is a side view of an electrochemical system, an optical dissolved oxygen sensor, Fig. 1 (c) is a side view of a conductivity sensor, Fig. 2 is a terminal method of dissolved oxygen sensor, BNC method, Fig.
FIG. 2 is a perspective view illustrating an on-site smart dissolved oxygen analyzer according to the present invention,
FIG. 3A is a front view of an embodiment of a Smart Dissolved Oxygen Analyzer for a field according to the present invention,
FIG. 3B is an exploded perspective view of the analyzer to which the display unit is applied as SND, in which a temperature unit sticker is attached to the LED lamp,
FIG. 3C and FIG. 3D are exploded perspective views of a case and a pad as an example of an analyzer in which the display unit is applied as SND;
FIG. 4A is a front view of a Smart Dissolved Oxygen Analyzer according to the present invention, in which a display unit is applied by an LCD, an LED, an OLED,
FIG. 4B is an example of operating a dial to select a mode window,
FIG. 5 is a front view showing a state where the display unit is separated from the case in the smart Dissolved Oxygen Analyzer for the field according to the present invention;
FIG. 6 is a front view of a Smart Dissolved Oxygen Analyzer according to the present invention, in which a display unit is applied in a touch panel manner and used in a panel form,
FIG. 7 is a rear view showing a terminal block of the smart Dissolved Oxygen Analyzer for field use according to the present invention,
FIG. 8 is a use example in which the display switching unit is provided on the display unit of the smart Dissolved Oxygen Analyzer for the field according to the present invention,
9 is a schematic block diagram of a smart Dissolved Oxygen Analyzer for the field according to the present invention,
10 is a graph showing a state in which the manipulation error rate is lost by comparing PID control with PI control,
Figs. 11 and 12 are views showing an installation example in which a field-mounted Smart Dissolved Oxygen Analyzer according to the present invention is installed on a panel or a wall,
13 shows an example in which a dissolved oxygen analyzer is installed in a vertical pipe, FIG. 13 shows an example in which a dissolved oxygen analyzer is installed in a horizontal pipe,
16 is a use state diagram of an on-site Smart Dissolved Oxygen Analyzer to which a dissolved oxygen sensor is connected.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.
As shown in FIGS. 1 to 13, the smart Dissolved Oxygen Analyzer for a field of the present invention includes a
The
An
The dissolved
Here, the electrode of the dissolved
In the case where the dissolved
Here, the
When the dissolved
That is, when the dissolved
The dissolved
For example, when the dissolved
In addition, when the dissolved
In the case where the dissolved
The
At this time, the
In addition, the
In addition, the
The
In this case, when the dissolved
In addition, it is configured to be able to perform an automatic recognition setting according to the dissolved
The
The
In addition, a first
The auxiliary
A barometer and an
The dissolved
For example, when measuring the dissolved oxygen amount (%) using the dissolved
Thus, when measuring dissolved oxygen, air pressure affects oxygen pressure in air or water samples, and the pressure of oxygen on a sea level basis is 160 mmHg (0.21 ㅧ 760 mmHg). A sample saturated with air at the
On the other hand, the display of the dissolved
The
For example, the LCD method can be selectively activated depending on conditions of use and manufacturing conditions, such as LCM, TN, HTN, STN, FSTN and TFT, which can be activated during operation by incorporating a backlight function.
That is, the LCD of the
The LCD method, the LED method, the OLED method, and the touch panel method of the
The SND (7-segment display) method of the
In this case, the method of graphically displaying the measured values in the
That is, the LCD method, the LED method, the OLED method, and the touch panel method are configured such that the whole screen is emitted simultaneously with the application of power.
In addition, the SND (7-segment display) system includes a
A
(° C) and Fahrenheit (° F) are displayed on the
In this case, the first and
Here, the unit of degrees Celsius (° C) or Fahrenheit (° C) through the operation of the first and
That is, the SND (7-segment display) method is configured to emit light by a light emitting lamp not shown in the drawing by power supply.
For example, the
At this time, if the control signal that determines various setting information and error through the
Here, the
In addition, a
When the diaphragm is used for the measurement in the electrophoretic system, the
In addition, when the user sets the replacement period of the dissolved
At this time, the format of the output signal may be an automatic or manual output format selected from various insulated voltage and current signals, HART communication, RS232C (RS485, Modbus, TCP / IP) A
The
The
The
Here, the non-volatile memory and the volatile memory are stored in the form of a circuit program in the
In this case, when the volatile memory is formed in the
The
In addition, the
The
In addition, in the
Herein, the signal for driving the cleaning device is connected to the
At this time, when the
The thermocouple, the RTD and the thermistor are temperature sensors capable of measuring a temperature when the
In addition, it is possible to manually input the temperature measurement data corrected according to the equation into the temperature (° C) or Fahrenheit manually (manual) through the
The
The
The
The dissolved
Further, it is also possible to divide each calibration measurement value into a plurality of
At this time, when the dissolved
Here, if the dissolved
At this time, the ice crush titration method is calibrated to the mg / L concentration value, while the air saturation method and the water saturated air (air) method corrects the% saturation output.
The above two-point calibration (0 point calibration, oxygen saturation calibration) method is a method for calibrating an oxygen-free zero point by making a solution of the following anoxic condition, adding 2 grams of sodium sulfite (Na 2 SO 3 ) to 1 liter of tap water or deionized water Dissolve to produce an oxygen-free solution. If you want a quick reaction, add a small amount of cobalt chloride (CoCl 2 ), mix well and allow to stand for 60 minutes to allow for oxygen free conditions. Add 5 to 7 grams of dry yeast to 350 mL of distilled water, The yeast may consume oxygen to satisfy the anaerobic environment or may install the dissolved
Thus, gases such as carbon monoxide, hydrogen, nitrogen monoxide, ethylene, carbon dioxide, hydrogen sulfide, sulfur dioxide, halogen, neon, nitrous oxide, nitrogen monoxide, helium and nitrous oxide during calibration of the dissolved
That is, since the calibration procedure has a different reference method according to the calibration environment, if a theoretical numerical value is input to the
The
At this time, the
In the vicinity of the
Here, the operating
In addition, the
The first to
The
In the
In addition, a dial control unit that operates as a
At this time, if the
The
That is, the panel mount type is a method of inserting the
The
The
As an example of the proportional integral control (PI control), when the diminished error value falls below the resolution of the manipulated variable, the current value is controlled to be constantly maintained with a very small error to the target value. There is a problem that a certain time is required to reach the target value in a manner of integrating the residual deviation and reading the error with a certain magnitude error and then increasing the manipulated variable, so that the
That is, the
The operation and effect of the present invention constructed as described above will be described below.
As shown in FIGS. 1 to 14, in order to measure the dissolved oxygen concentration while taking into account the interference factors of BOD, temperature, salinity, altitude and altitude of the water quality using the
When the AC power source is used, the
Next, the dissolved
If the
The dissolved
In addition, the
The first and second light emitting
At this time, if the dissolved
When the calibration work of the dissolved
An example of measuring the dissolved oxygen concentration after connecting the
When the
When the electric conductivity is measured in the electric conductivity measurement mode using the
As an example, calibration is performed in a measurement mode in which the dissolved
1. When the first and
2. When "STD1" is displayed on the
3. When "STD2" appears on the display unit (50), immerse it in atmospheric saturation or underwater saturated solution and press "ENTER". "STD2" flickers for 10 seconds. When calibration is finished, it stops blinking with buzzer (13) If the 25 °
At this time, the type of calibration solution suitable for the dissolved
In this manner, when the multipoint calibration is performed, each calibration measurement value is divided through each or a plurality of
4. After the multipoint calibration of the dissolved
At this time, by displaying "STD1" or "STD2" indicating the calibration solution for calibration of the dissolved
The reason for multipoint calibration of the dissolved
In this case, the meaning of the calibration STD1 and STD2 is as follows. When the STD1 is a zero solution, the
Hereinafter, the process of setting various modes will be described as an example.
1. When the "SET" mode is entered by simultaneously pressing the
2. When "TEMP" is displayed on the
3. When "TEMP" is displayed on the
4. When "TEMP" is displayed on the
When all the settings are made, the previous menu is depressed by simultaneously pressing the first and
In addition, the temperature compensation setting mode process will be described as an example.
1. Press the
2. Press the
3. When the fourth button (74) is operated, the temperature setting phrase " TEMP " is displayed on the display unit (50).
4. Press the fourth button (74) "ENTER" again and "aSmU" appears to select automatic "SHIFT" and manual "UP" compensation.
5. When the temperature is automatically compensated, "1000" is basically indicated by compensating control of the
6. In case of Manual Compensation, press "UP" button of the third button (73) in "aSmU" state and "0250" is indicated by default. It means 25.0 ℃. If you want to use 30 ℃ for example, press "SHIFT" and go up to 0.1 ℃ increments. Conversely, if you press "3rd" button ("73") at "0250" (74) Press "ENTER" to set the desired temperature.
7. After pressing the fourth button "ENTER" and saving the setting, press the first button (71) "M" and return to the measurement screen.
8. After the auto and manual settings are completed, press the fourth button (74) "ENTER" to display the initial set temperature unit "℃". Press the 4th button (74) , The third button (73) "UP" is pressed in the state of "° C" and the temperature changes to ° F or "F" on the
That is, the
For example, the measured value of dissolved oxygen concentration varies depending on the temperature. In the measurement of dissolved oxygen concentration, temperature compensation refers to correcting a temperature-dependent slope.
An example of the upper / lower limit value setting (alarm alarm setting) mode process is as follows.
1. Press the
2. At this time, press the fourth button (74) "ENTER" to enter (if you press the first button (71) "M" to exit, return to the measurement screen)
3. When the user presses the
4. Press the
5. When the user presses the
6. If you press the fourth button (74) "ENTER" on the "HIGH", "0811" will appear by default. It means 08.11mg / L and if you press "SHIFT", the digit moves from left to right. Third button (73) Increase the number to "UP" (the number goes up to 1 unit and repeats from 0 to 9)
7. When the upper limit setting is completed and the
8. The lower limit setting is 0400, which means 04.00 mg / L, and the setting method is the same as upper limit.
9. When finished, press the fourth button (74) "ENTER" and save and press the first button (71) "M" mode.
Hereinafter, a cleaning cycle and a cleaning time setting mode process will be described as an example.
1. Press the
2. At this time, press the fourth button (74) "ENTER" to enter. (If you press the first button (71) "M" to exit, return to the measurement screen.)
3. When entering the
4. When the first cleaning cycle "CP" is displayed on the
5. When the cleaning cycle "CP" is displayed on the
6. If you want to change the cleaning cycle, press the second button (72) "SHIFT" to move the digits from left to right. The numeric value is incremented by "UP" Repeat until it is up.)
7. When the cleaning cycle ends and the fourth button (74) "ENTER" is pressed, the cleaning time "CT" is displayed. Press the fourth button (74) "ENTER" 71) Exit to "M", and so on.
8. The basic setting of the cleaning time is 0000, which means that the cleaning time is 0 seconds. If it is 0030, the cleaning relay is activated and stopped for 30 seconds.
9. When the cleaning setting is completed, press the fourth button (74) "ENTER" and save it. Then press the first button (71) "M" mode to return to the measurement screen.
The measurement unit setting mode process will be described as an example.
1. When the
2. At this time, press the fourth button (74) "ENTER" and enter. (If you want to exit, press the 1st button (71) "M" to return to the measurement screen.)
3. When entering the
4. The initial setting of the unit of measurement is indicated by "-NO-" on the display (50), which means that the unit is not used.
5. Press the
6. At this time, if the fourth button (74) "ENTER" is pushed on the corresponding unit, the setting is completed, and a unit instead of the temperature may be displayed in the
When the measurement is performed after the above setting is completed, the analog signal measured by the dissolved
Therefore, the conventional dissolved oxygen meter displays only the dissolved oxygen measurement value of the water quality by using only the dissolved oxygen sensor, and there is no pressure compensation function that affects the dissolved oxygen amount, so that the dissolved oxygen amount is affected by the pressure depending on the measurement environment On the other hand, the
In addition, the conventional dissolved oxygen meter has no function to compensate for the decrease in oxygen solubility when the salinity is affected by the salinity of water when measuring the dissolved oxygen concentration, while the
In addition, in the conventional dissolved oxygen meter, when the dissolved oxygen sensor is operated by the polarographic method, it is impossible to know whether the polarization of the sensor is delayed, whether the polarization process is completed or not, and whether the electrode is polarized. On the other hand, 100 indicates the completion of the polarization process and the polarization of the first and
In addition, in the conventional dissolved oxygen meter, when the dissolved oxygen sensor is a diaphragm type, the diaphragm must be replaced at regular intervals according to the contamination or the life. Since the function of detecting the replacement period of the diaphragm is not available, The
In addition, since the conventional dissolved oxygen meter consumes oxygen during measurement when the dissolved oxygen sensor is an electrochemical sensor, there is no interference compensation function in which the measured output is abnormally lowered unless oxygen is supplied through the sample movement. There is a problem that the reliability of measurement is lowered by reading the
In addition, since the
In addition, the
In addition, the
The
The
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.
10:
10b:
10d:
10f:
11: first power terminal 12: second power terminal
13: buzzer 14: camera
15: microphone 16: earphone jack
17: Removable storage slot 18: barometer and altimeter
19: Polarization device 20: Dissolved oxygen sensor
20a:
21:
22:
23: sensor body 25: temperature sensor
26: first
27: second
28:
30: input channel 31: first input channel
30a:
30c:
30e:
30g: second light emitting
32: second input channel 40: output channel
41: Signal output terminal 42: Temperature output terminal
43: HART output terminal 44: RS232C output terminal
45: RS485 output terminal 46: Cleaning output terminal
50: Display part 51: Measured value display window
52:
52b, 52c: first and second LED lamps 53: electrode display window
54: Error warning window 55: Calibration display window
56: Output display window 57: Cleaning display window
58: graphic window 59: display switching section
59a:
60:
70:
75: illuminance sensor 76: dial
80: Processor 81:
81a: unit conversion unit 82: communication unit
82a: communication port 83: language conversion section
84: inverting / non-reversing part 85: sensor control part
86: Temperature compensation section 87: PID control section
88: output conversion unit 89: interference compensation unit
100: Analyzer
200: Panel 300: Wall
400: Pipe 500: Panel
B: Bracket T: Temperature terminal
S: Shield terminal E: Earth terminal
Claims (30)
A plurality of output channels 40 for outputting measurement values are formed at one side of the input channel 30 connecting the dissolved oxygen sensor 20 and the conductivity sensor 20b to the rear of the case 10,
The dissolved oxygen concentration, the electric conductivity, the BOD measurement value display, the temperature display, the salinity measurement value display, the atmospheric pressure value and the altitude value display by the dissolved oxygen sensor 20, the conductivity sensor 20b connected to the input channel 30, A calibration display, and a sensor replacement notification are displayed, and the steady state and the abnormal state are displayed differently by the inverting / non-returning unit 84 of the processor 80, and the abnormality of the measurement tilt or the hunting phenomenon A display unit 50 for displaying a signal to be output through the cleaning output terminal 46 to operate a separate cleaning apparatus through the control of the processor 80 is formed in front of the case 10 In addition,
A lamp unit 60 is formed around the display unit 50 to indicate a steady state, an abnormal state, an upper / lower limit value, a connection state of the dissolved oxygen sensor 20, an error indication of electrode connection,
A plurality of relay operations for setting a unit of measurement values, setting and calibrating upper and lower limit values of a measurement range, setting a measurement interference factor compensation, cleaning setting, polarity setting, and a dissolved oxygen sensor 20, And the operating unit (70) having the braille formed therein is configured to display measured values of dissolved oxygen concentrations of water used for power plants and various fields.
Wherein the dissolved oxygen sensor (20) is configured to be measured using one of a polarographic method and a galvanic method when the dissolved oxygen sensor (20) is an electrochemical sensor.
Compensation for interferent stays of carbon monoxide, hydrogen, nitrogen monoxide, ethylene, carbon dioxide, hydrogen sulfide, sulfur dioxide, halogen, neon, nitrite, nitrous oxide, chlorine, helium and nitrous oxide during calibration of the dissolved oxygen sensor 20 is performed by the processor 80 The interference compensator 89 of the smart Dissolved Oxygen Analyzer of the present invention.
Each of the calibration measurements is divided into a plurality of calibration display windows 55 and displayed on the display unit 50 by using a plurality of calibration solutions having different measurement ranges per one of the dissolved oxygen sensors 20. [ Smart Dissolved Oxygen Analyzer.
Wherein the analyzer is configured to be able to perform an automatic recognition setting according to a dissolved oxygen sensor (20) connected to the input channel (30) or manually set using an operation unit (70).
The second input channel 32 is connected to the first and second light emitting device channels 30f and 30g, the light receiving device channel 30h, the temperature terminal channel 30c, the shield terminal channel 30d and the earth terminal channel 30e And the optical dissolved oxygen sensor (20) is connected to the optical dissolved oxygen analyzer.
Wherein the auxiliary power supply unit is formed in the case to continuously supply power when the power is turned off to maintain the measurement state.
Wherein the atmospheric pressure value and the altitude value measured by the atmospheric pressure measuring device or the altitude measuring device are manually inputted through the operating part (70) when the barometer and the altimeter (18) are not formed, Analyzer.
The LCD system has a built-in backlight function and is formed of one of LCM, TN, HTN, STN, FSTN and TFT,
The LCD method, the LED method, the OLED method, and the touch panel method have a measurement value display window 51 that displays measured values numerically or graphically in ppb, ppm or mg / L,%, A temperature display window 52 indicating automatic or manual selection of the sensor type, a sensor display window 53 indicating the type of the connected sensor, an error warning window 54, a calibration display portion 55 for displaying calibration contents, An output display window 56 for transferring measurement values to another device, and a cleaning display window 57 for displaying cleaning contents are formed or formed so as to be switched from one display screen to another,
The SND (7-segment display) system includes a measurement value display window 51 for displaying a measurement value and a temperature display window 52 for displaying the temperature in degrees Celsius or degrees Fahrenheit by automatic or manual selection A smart dissolved oxygen analyzer for on-site use.
Wherein the LCD unit, the LED unit, the OLED unit, and the touch panel unit of the display unit 50 are configured to be displayed in a distorted font.
Wherein a camera (14), a microphone (15), and an earphone jack (16) are formed on one side of the case (10) to configure a real time video communication with a field and a control center.
The display unit 50 or the lamp unit 60 displays a notification according to the setting by manually inputting the setting through the operation unit 70 at the time of setting the replacement period and notifying of the replacement period, Oxygen analyzer.
Wherein the display unit (50) is installed in a separate case (10a) separated from the case (10) and configured in a separated form.
The processor 80 displays the real-time measurement value on the display unit 50 using the communication unit 82 using Bluetooth or Wi-Fi, and transmits the measurement data to an external device of another smart phone or a personal portable terminal, To download and manage data of the device,
Wherein the portable storage slot (17) for connecting the USB device and the SD card device is formed in the case (10) or the separation case (10a) of the display unit (50).
And the manual temperature compensating method according to the present invention is configured to manually input the temperature measurement data corrected in accordance with the equation into the temperature measurement data in degrees Celsius (° C) or Fahrenheit (F) manually through the operation unit (70).
When two or three of the buttons are operated at the same time,
The button constitutes a braille character 70a for the visually impaired,
And a dial operation unit is formed at one side of the button.
The display unit 50 is configured to manually adjust the color, brightness, and ON / OFF through the operation of the operation unit 70 or to automatically adjust the brightness and ON / OFF according to the amount of light by detecting the illuminance Wherein said analyzer comprises:
(° C) and Fahrenheit (F) on the pad (10g) attached to the front surface of the front cover (10d) of the case (10) 2LED lamps 52b and 52c are provided in the lamp hole 10f of the front cover 10d so that only when the first and second LED lamps 52b and 52c emit light, ) Or Fahrenheit (F) display is projected on the screen.
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| KR1020140169469A KR101526217B1 (en) | 2014-12-01 | 2014-12-01 | On-Line Smart DO Analyzer |
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| KR1020140169469A KR101526217B1 (en) | 2014-12-01 | 2014-12-01 | On-Line Smart DO Analyzer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101621222B1 (en) | 2015-10-30 | 2016-05-16 | 길주형 | Smart Water quality measurement sensor |
| KR101621220B1 (en) | 2015-10-30 | 2016-05-16 | 길주형 | Smart water quality measurement system by Optical |
| CN109655502A (en) * | 2017-10-11 | 2019-04-19 | 中山大学 | A kind of portable multi-channel electrochemical detection system |
| CN109916885A (en) * | 2019-03-26 | 2019-06-21 | 思源电气股份有限公司 | Insulating oil dissolved oxygen content real time on-line detection device |
| CN113866233A (en) * | 2021-11-01 | 2021-12-31 | 福建顺昌虹润精密仪器有限公司 | High-precision online dissolved oxygen measuring instrument |
| CN116297776A (en) * | 2023-05-25 | 2023-06-23 | 华南农业大学 | Electrolytic type dissolved oxygen rapid detection device and method |
| CN108663347B (en) * | 2018-07-09 | 2023-09-22 | 山东省科学院海洋仪器仪表研究所 | Multi-parameter interference compensation correction system and method for optical dissolved oxygen sensor |
| CN109916885B (en) * | 2019-03-26 | 2024-04-26 | 上海思源光电有限公司 | Real-time online detection device for content of dissolved oxygen in insulating oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090032635A (en) * | 2007-09-28 | 2009-04-01 | 삼성전자주식회사 | Mobile communication terminal for sight disabled and method of transmitting short message using the terminal |
| KR20100069368A (en) * | 2008-12-16 | 2010-06-24 | (주)에이엔티이십일 | Sewage treatment apparatus for implementing automatic calibration and radio communications |
| KR101039562B1 (en) * | 2011-01-13 | 2011-06-09 | 길주형 | Water quality sensors with built-in signal converter |
-
2014
- 2014-12-01 KR KR1020140169469A patent/KR101526217B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090032635A (en) * | 2007-09-28 | 2009-04-01 | 삼성전자주식회사 | Mobile communication terminal for sight disabled and method of transmitting short message using the terminal |
| KR20100069368A (en) * | 2008-12-16 | 2010-06-24 | (주)에이엔티이십일 | Sewage treatment apparatus for implementing automatic calibration and radio communications |
| KR101039562B1 (en) * | 2011-01-13 | 2011-06-09 | 길주형 | Water quality sensors with built-in signal converter |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101621222B1 (en) | 2015-10-30 | 2016-05-16 | 길주형 | Smart Water quality measurement sensor |
| KR101621220B1 (en) | 2015-10-30 | 2016-05-16 | 길주형 | Smart water quality measurement system by Optical |
| CN109655502A (en) * | 2017-10-11 | 2019-04-19 | 中山大学 | A kind of portable multi-channel electrochemical detection system |
| CN108663347B (en) * | 2018-07-09 | 2023-09-22 | 山东省科学院海洋仪器仪表研究所 | Multi-parameter interference compensation correction system and method for optical dissolved oxygen sensor |
| CN109916885A (en) * | 2019-03-26 | 2019-06-21 | 思源电气股份有限公司 | Insulating oil dissolved oxygen content real time on-line detection device |
| CN109916885B (en) * | 2019-03-26 | 2024-04-26 | 上海思源光电有限公司 | Real-time online detection device for content of dissolved oxygen in insulating oil |
| CN113866233A (en) * | 2021-11-01 | 2021-12-31 | 福建顺昌虹润精密仪器有限公司 | High-precision online dissolved oxygen measuring instrument |
| CN116297776A (en) * | 2023-05-25 | 2023-06-23 | 华南农业大学 | Electrolytic type dissolved oxygen rapid detection device and method |
| CN116297776B (en) * | 2023-05-25 | 2023-08-18 | 华南农业大学 | Electrolytic type dissolved oxygen rapid detection device and method |
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