WO2010068036A2 - 발광 다이오드를 이용한 수위 표시 장치 및 그를 포함한 수위 측정 시스템 - Google Patents
발광 다이오드를 이용한 수위 표시 장치 및 그를 포함한 수위 측정 시스템 Download PDFInfo
- Publication number
- WO2010068036A2 WO2010068036A2 PCT/KR2009/007360 KR2009007360W WO2010068036A2 WO 2010068036 A2 WO2010068036 A2 WO 2010068036A2 KR 2009007360 W KR2009007360 W KR 2009007360W WO 2010068036 A2 WO2010068036 A2 WO 2010068036A2
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- WIPO (PCT)
- Prior art keywords
- water level
- level measurement
- display device
- light emitting
- terminals
- Prior art date
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
- G01F23/242—Mounting arrangements for electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
- G01F23/18—Indicating, recording or alarm devices actuated electrically
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
- G01F23/243—Schematic arrangements of probes combined with measuring circuits
Definitions
- the present invention relates to a water level display device and a water level measurement system using the same, and more particularly, to a water level display device having improved visibility using a light emitting diode and a water level measurement system using the same.
- a water level measurement system is installed and used to measure the level of a fluid such as a river, a lake, a river, or the like.
- the data measured by the water level measurement system such as the current water level and the water level change, are used to maintain the bridge, to predict the occurrence of summer floods, or to control traffic for safety when the water level is above a certain level. It is used in a variety of ways.
- Level gauges provided in the water level measurement system for measuring the water level include a contact level gauge for measuring the water level by directly contacting the water, and a non-contact level gauge for measuring the water level using ultrasonic waves or lasers from the outside of the water.
- the present invention is to achieve the above object, the technical problem to be achieved in the present invention, to ensure visibility even at night or rainy day, the average water level is displayed high visibility, automatic level recognition function to measure the measurement results in real time
- the present invention provides a water level display device using a light emitting diode, a water level measurement system, and a method thereof, which can be utilized for analysis.
- the water level display device a plurality of common terminals; A plurality of water level measuring terminals arranged at regular intervals along the longitudinal direction; A level measurement control unit configured to generate a level measurement result by reading a current state flowing through the plurality of level measurement terminals and measuring a level of a level measurement target after sending a current through the plurality of common terminals; And a light emitting diode unit configured to read the water level measurement result and display it through a plurality of light emitting diodes.
- the water level measurement system sends a current into a water level measurement object through a plurality of common terminals, reads currents coming into a plurality of water level measurement terminals arranged at regular intervals along the longitudinal direction, and measures the water level.
- a water level display device for controlling the on / off of the plurality of light emitting diodes arranged to form a number and a scale to display a water level measurement result;
- a main control module for reading the level measurement result from the level display device and controlling the level display device to display the level measurement result numerically and on a scale through the plurality of light emitting diodes;
- a power supply module supplying power to the water level display device according to the control of the main control module;
- a display module for displaying the result of the water level measurement under the control of the main control module.
- the water level display device and the water level measurement system using the light emitting diode according to the present invention made as described above, can be displayed at high visibility by securing visibility at night or rainy weather, and provides an automatic water level recognition function to display the measurement results It can be used for real-time measurement and analysis.
- FIG. 1 is an overall configuration diagram of a water level measurement system according to an embodiment of the present invention.
- FIG. 2 and 3 are detailed configuration diagrams of the water level display device shown in FIG. 1.
- FIG. 4 and 5 are schematic views and photographs of the water level display device for illustratively explaining the operation of the water level display device shown in FIG. 1.
- FIG. 6 is a diagram illustrating a state in which the water level display device of FIG. 1 is installed in a pillar of a bridge.
- FIG. 1 is an overall configuration diagram of a water level measurement system according to an embodiment of the present invention.
- the water level measurement system includes a water level display device 100, a main control module 210, a display module 220, and a power supply module 230.
- the water level display device 100 is a device installed in a river or a river to measure the current water level and transmit the measured water level information to the main control module 210. It is composed of LED (Light Emitting Diode), and the light emitting diode partly emits light according to the water level, so that it is easy to identify the water level by the naked eye in the harsh environment such as night or rainy weather.
- LED Light Emitting Diode
- the water level display device 100 When the water level display device 100 according to the present invention flows a current into a water level measurement object through a common terminal, which is an output terminal, and the water level measurement terminal, which is an input terminal, is submerged in a water level measurement object (fluid such as water), After measuring the water level of the measurement target by amplifying and reading the minute current flowing therein, the water level measurement result is displayed by controlling the on / off of a plurality of light emitting diodes arranged to form a display portion such as a numerical portion and a scale portion. do.
- the main control module 210 reads the water level measurement results from the plurality of water level display devices 100, comprehensively analyzes the read water level measurement results, and then supplies the water level information according to the analysis results to the respective water level display devices 100. By transmitting, each level display device 100 can display the result of the level measurement using a number, a scale, or the like through a plurality of light emitting diodes.
- the power supply module 230 is for supplying power to the water level display device 100 under the control of the main control module 210. Since the water level display device 100 does not have a large power consumption based on the driving of the light emitting diodes, the water level display device 100 can be driven only by the solar cell.
- the display module 220 is an electronic display that displays the result of the water level measurement under the control of the main control module 210, so that a manager or a passenger can easily recognize the information regarding the current water level during flooding or level observation.
- a plurality of water level display devices (for example, 32) installed in each of the main control module 210 ( After collecting and analyzing the information on the current water level from 100), the current water level is displayed on the display module 220, and the water level information is transferred to another system through a built-in communication line (for example, RS ?? 232 communication). Will be provided.
- a built-in communication line for example, RS ?? 232 communication
- FIG. 2 and 3 are detailed configuration diagrams of the water level display device shown in FIG. 1.
- the water level display device 100 includes a water level measurement control unit 110, a sensor output management unit 120, a sensor input management unit 130, and a light emitting diode unit 140.
- the sensor output manager 120 includes a plurality of common terminals 122 and a sensor output driver 121
- the sensor input manager 130 includes a plurality of water level measurement terminals 133, an analog switch unit 132, and a signal.
- the comparison performing unit 131 is included.
- the water level measurement control unit 110 is provided inside the water level display device 100 to perform functions such as accurate water level recognition, average water level calculation, and display through the water level measurement control unit 110. This allows for specialized programming.
- the water level measurement control unit 110 sends a current to the plurality of common terminals 122 and then reads the current state flowing through each of the water level measurement terminals 133 to measure the water level of the water level measurement target to generate a water level measurement result. .
- the water level measuring terminal 133 is an input terminal and is formed so that a predetermined number (for example, 100) of the water level measuring terminals 133 are exposed to the outside at a predetermined interval (for example, every 10 cm).
- a predetermined number for example, 100
- the signal of the common terminal 122 is transmitted to the water level measurement terminal 133 through impurities in the measurement object to the water level measurement terminal 133. Fine current flows.
- the AC signal entering the water level measurement terminal 133 is transmitted to the water level measurement control unit 110 through the signal comparison performing unit 131, and the water level measurement control unit 110 can detect the water level through the AC signal.
- the common terminals 122 are arranged in a predetermined number (for example, 16) at regular intervals, and the same alternating current signal having the same electrical phase is input to the common terminal 122.
- the sensor output manager 120 applies an AC signal of low frequency having the same phase to the plurality of common terminals 122.
- the plurality of water level measuring terminals 133 are arranged at regular intervals along the vertical direction to form scales as shown in FIG. 3, and the scales for reading the water level are determined according to the arrangement intervals of the water level measuring terminals 133. For example, when the water level measuring terminal 133 is arranged every 10 cm, the water level can be read at intervals of 10 cm.
- the analog switch unit 132 is an electrical switch for connecting the plurality of water level measurement terminals 133 and the water level measurement control unit 110 with a plurality of water level measurement terminals 133 in sequence. Select and connect the signal input to the water level measurement terminal 133 and the water level measurement control unit 110.
- the analog switch unit 132 sequentially selects the plurality of water level measurement terminals 133 and transmits the current flowing through each level measurement terminal 133 to the signal comparison performing unit 131, the signal comparison performing unit 131
- the current flowing through each of the plurality of level measurement terminals 133 is amplified and input to the level measurement control unit 110.
- the water level measurement controller 110 determines whether each level measurement terminal 133 is locked in the water level measurement object through the current value of each level measurement terminal 133 read from the signal comparison performing unit 131, The water level is recognized according to the judgment result.
- the light emitting diode unit 140 is to display the water level measurement result by controlling on / off of a plurality of light emitting diodes arranged to form numbers and scales according to the water level measurement result read from the water level measurement control unit 110.
- the bar type display unit 142 includes a number type display unit 143 and a light emitting diode driver 141.
- the shape displayed by the light emitting diode unit 140 is not limited to the bar type and the number type as described above, and may be modified in various forms.
- the water level display device 100 flows a current into the water level measurement object through the common terminal 122, amplifies a minute current flowing when the water level measurement terminal 133 is submerged in the measurement object, and then measures the water level measurement controller 110. After measuring the water level of the object to be measured by reading through), and transmits the water level measurement result to the main control module 210, the light emitting diode unit 140 to display the water level measurement results at the request of the main control module 210 To control.
- the water level display device 100 includes a plurality of base plates (based on PL # 0 to PL # 9, hereinafter referred to as PL) having a predetermined length (for example, 1 m). PL) can be configured to be used by attaching the desired length.
- Each base plate PL is composed of a plurality of light emitting diodes, and includes a bar type display unit 142 and a numeric type display unit 143 for displaying the water level measurement results in scale and numbers, respectively.
- the water level measuring terminals 133 are arranged at 1 cm intervals at a length of 1 m, and the water level is arranged at predetermined intervals.
- the water level measurement control unit 110 reads the state of the analog switch unit 132 and transmits it to the main control module 210, and turns on the light emitting diode for each position according to the water level measurement result transmitted by the main control module 210.
- the water level measurement control unit 110 may have a function of turning on / off the hot wire for preventing frost at the request of the main control module 210.
- the bar type display unit 142 a scale of a predetermined interval located on a straight line with the plurality of water level measurement terminals 133 is formed, a plurality of light emitting diodes are arranged in the horizontal direction for each scale.
- the bar type display unit 142 displays the water level measurement results numerically by varying whether the plurality of light emitting diodes in the horizontal direction that form each scale are turned on or off according to the water level measurement result.
- the numeric type display unit 143 a plurality of light emitting diodes for displaying a number is disposed, and the result of the level measurement is numerically displayed by the control of the LED driver 141.
- the LED driver 141 described above controls the bar type display unit 142 and the numeric type display unit 143 according to the water level measurement result so that the water level measurement result is displayed in scale and numbers.
- the water level display device 100 may further include an inflow portion 153 and an frost preventing portion 155.
- the inlet 153 has a plurality of passages through which the fluid of the water level measurement object can enter and exit at regular intervals in the vertical direction.
- the freezing prevention unit 155 is provided with a heating wire for preventing freezing so that the water level display device 100 can be used even in a winter or low temperature region.
- the LED consumes little power
- a separate power source other than a solar cell may be required.
- the water level display device 100 including the electrical circuit for driving the light emitting diode should be installed in the object to be measured for a long time, pay attention to the waterproofing.
- the configuration of the base plate PL constituting the water level display device 100 will be described in more detail with reference to the embodiment shown in FIG. 3.
- the joining member 151 is a space required for wire treatment when connecting the base plates PL to each other.
- the common terminal 122 is a conductor for measuring the water level, is formed on the surface of the copper foil of a printed circuit board (PCB), and is gold-plated to prevent rust and increase conductivity.
- the common terminal 122 is a source of current and is arranged at appropriate intervals from below.
- the bar type display unit 142 arranges a plurality of light emitting diodes in a horizontal direction for displaying the water level, and a bar type display unit 142 is formed for each scale (for example, 1 cm).
- the water level measuring terminals 133 are arranged one by one for each scale, and are formed on the copper foil surface of the printed circuit board as a conductor for measuring the water level, and are gold plated to prevent corrosion and increase conductivity.
- the inlet 153 is formed with a plurality of passages 154 through which water level measurement objects can enter and exit, and are positioned adjacent to the common terminal 122 and the water level measurement terminal 133.
- a hole 152 formed on the body of the base plate PL is required to attach the base plate PL to a structure such as a pillar of a bridge by using a screw or the like.
- the water level display device 100 sends a current to the common terminal 122 of the basic plate PL configured as described above, and reads the state of the water level measuring terminal 133 arranged for each scale, thereby measuring the current water level. After transmitting the result to the main control module 210 by the built-in water level measurement control unit 110, the plurality of light emitting diodes are turned on / off as required by the main control module 210.
- FIG. 4 and 5 are for explaining the operation of the water level display device shown in FIG. 1 by way of example, a schematic diagram (FIG. 4) of the water level display device 100 and a photograph of the water level display device 100 (FIG. 5). to be.
- the main control module 210 of the water level measurement system comprehensively analyzes the water level information collected from the one or more water level display devices 100, and displays a bar type display unit corresponding to the current water level in each water level display device 100 according to the analysis result. Turn on the 142 and the numeric type display unit 143, and displays the information about the water level through the display module 220, or transmits the water level measurement results to the desired place.
- the water level measurement control unit 110 of each level display device 100 stores the water level information detected by the signal comparison performing unit 131 and, when requested by the main control module 210, the main control module 210.
- the water level information is transmitted, and the LEDs indicating the water level positions are turned on as shown in FIGS. 4 and 5 at the request of the main control module 210.
- the water level display device 100 can automatically recognize the water level by the electric conductor forming the common terminal 122 and the water level measurement terminal 133, and improves visibility by the light emitting diodes of the numerical part and the graduation part. In addition, the water level value can be expressed for easy visual identification.
- the water level display device 100 In the case of driving the LED, when the water level display device 100 is designed to emit light at all parts of the base plate PL and only at the upper part of the current level, the water level display device 100 is shown in FIGS. 4 and 5. Likewise, in the state in which the light emitting diodes of all the numeric type display units 143 are turned on, the light emitting diodes of the bar type display unit 142 positioned at the upper portion BL of the water surface AL are turned on.
- the water level measurement system automatically measures the current water level or the water level for a period of time through one or more water level display devices 100 installed in a structure in a river or a river such as a pillar of a bridge, and then a manager or a passenger adjusts the water level. Displayed to the light emitting diode unit 140 of the water level display device 100 for easy viewing, and further transmits the value to another system requiring a level measurement result, such as a central control center, thereby displaying the result received by the system. Display it on the module 220, or to collect the data so that it can be used in various ways.
- FIG. 6 is a diagram illustrating a state in which the water level display device of FIG. 1 is installed in a piers.
- the display module 220 in the upper portion of the bridge has a main control module 210 and a power supply module 230 for supplying DC power.
- a main control module 210 After installing a plurality of water level display devices 100 (for example, five) for each pier in a specific area of the bridge, the water level measured by each water level display device 100 is measured by the main control module 210. If so, the main control module 210 can comprehensively analyze the water level measurement results of various places while measuring in real time, and can be utilized in all directions such as intensive rain / flood preparation and traffic control.
- the entire structure except for the electrical conductor is manufactured to protect the circuit portion placed in the water level measurement object for a long time, and is durable to prevent damage to the internal circuits from external shocks. Secure it so that it can stand the impact. Since all the light emitting parts of the water level display device 100 use light emitting diodes with low power consumption, the low power structure can be designed.
- the base plate PL is attached with an icing prevention part 155 that prevents icing by heat generated by electricity, so that the water level can be measured even when icing.
- Table 1 below illustrates performance evaluation criteria of the water level display device 100.
- the present invention can be usefully applied when sound absorption is required.
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- Theoretical Computer Science (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Abstract
Description
기능 | 평가 기준 | 결과 |
발광 다이오드의 발광 | 주/야간 발광 다이오드의 발광에 의한 가시거리 | 주야간 가시거리 20m |
수위 자동 인식 | 수위 변화에 따른 인식 | 해상도 1cm, 수위 급변 시 이전 10분 측정 평균값 표시 가능, 마이크로프로세서를 이용한 다양한 프로그래밍 가능 |
방수 기능 | 회로 보호를 위한 완전 방수 | 실리콘에 의한 인쇄 회로 기판의 1차 방수, 외부 몰딩에 의한 2차 방수로 구성 |
내구성 | 하천 유하물 충돌에 대한 내구성, 온도 변화에 따른 내구성 | 수위 표시 장치의 전면을 내충격성, 내열성, 내한성이 강한 PC(Poly Carbonate)로 제작 |
저전력 구조 | 사용 최대 전력(결빙 방지부 미부착 시) | 소비 전력 10W(기본 플레이트 1기당) |
Claims (11)
- 복수의 공통 단자;세로 방향을 따라 간격을 두고 배열되는 복수의 수위 측정 단자;상기 복수의 공통 단자에 전류를 흘려 보낸 후, 상기 복수의 수위 측정 단자로 흐르는 전류 상태를 읽어 들여 수위 측정 대상의 수위를 측정하는 수위 측정 제어부; 및상기 수위 측정 제어부로부터 수위 측정 결과를 읽어 들여 복수의 발광 다이오드를 통해 표시하는 발광 다이오드부를 포함하는 것을 특징으로 하는 수위 표시 장치.
- 제 1항에 있어서, 상기 발광 다이오드부는,상기 복수의 수위 측정 단자와 일직선 상에 위치하여 간격을 가진 눈금을 형성하고, 각 눈금마다 가로 방향으로 복수의 발광 다이오드가 배열되어 있으며, 상기 수위 측정 결과에 따라 각 눈금을 형성하는 가로 방향의 복수의 발광 다이오드에 대한 온/오프 여부를 달리하여 상기 수위 측정 결과를 눈금으로 표시하는 바 타입 표시부;숫자를 표시하기 위한 복수의 발광 다이오드를 포함하여 상기 수위 측정 결과를 숫자로 표시하는 숫자 타입 표시부; 및상기 수위 측정 결과에 따라 상기 바 타입 표시부 및 상기 숫자 타입 표시부를 제어하여 상기 수위 측정 결과가 눈금 및 숫자로 표시되도록 하는 발광 다이오드 구동부를 포함하는 것을 특징으로 하는 수위 표시 장치.
- 제 1항에 있어서,상기 복수의 공통 단자로 동일한 위상을 갖는 저주파의 교류 신호를 인가하는 센서 출력 구동부를 더 포함하는 것을 특징으로 하는 수위 표시 장치.
- 제 1항에 있어서,상기 복수의 수위 측정 단자 각각에 흐르는 전류를 증폭하여 상기 수위 측정 제어부로 전달하는 신호 비교 수행부; 및상기 복수의 수위 측정 단자를 순차적으로 선택하여 각 수위 측정 단자에 흐르는 전류를 상기 신호 비교 수행부로 전달하는 아날로그 스위치부를 더 포함하는 것을 특징으로 하는 수위 표시 장치.
- 제 4항에 있어서, 상기 수위 측정 제어부는,상기 신호 비교 수행부로부터 읽어 들인 각 수위 측정 단자의 전류 값을 통해 각 수위 측정 단자가 수위 측정 대상의 내부에 잠겨 있는지 여부를 판단하고, 판단 결과에 따라 수위를 인식하는 것을 특징으로 하는 수위 표시 장치.
- 제 1항에 있어서,수위 측정 대상이 드나들 수 있는 복수의 통로가 세로 방향으로 일정 간격마다 배치되어 있는 유입부를 더 포함하는 것을 특징으로 하는 수위 표시 장치.
- 복수의 공통 단자를 통해 수위 측정 대상 속으로 전류를 흘려 보내고, 세로 방향을 따라 간격을 두고 배열된 복수의 수위 측정 단자로 들어오는 전류를 읽어 들여 수위를 측정한 후, 복수의 발광 다이오드의 온/오프를 제어하여 수위 측정 결과를 표시하는 수위 표시 장치;상기 수위 표시 장치로부터 상기 수위 측정 결과를 읽어 들이고, 상기 복수의 발광 다이오드를 통해 상기 수위 측정 결과를 표시하도록 상기 수위 표시 장치를 제어하는 주 제어 모듈;상기 주 제어 모듈의 제어에 따라 상기 수위 표시 장치로 전원을 공급하는 전원 공급 모듈; 및상기 주 제어 모듈의 제어에 따라 상기 수위 측정 결과를 표시하는 디스플레이 모듈을 포함하는 것을 특징으로 하는 수위 측정 시스템.
- 제 7항에 있어서, 상기 수위 표시 장치는,복수의 공통 단자;세로 방향을 따라 간격을 두고 배열되는 복수의 수위 측정 단자;상기 복수의 발광 다이오드를 온/오프하여 상기 수위 측정 결과를 표시하는 발광 다이오드부; 및상기 복수의 공통 단자에 전류를 흘려 보내며, 상기 복수의 수위 측정 단자로 흐르는 전류 상태를 읽어 들여 수위를 측정한 후 상기 수위 측정 결과를 상기 주 제어 모듈로 전달하며, 상기 주 제어 모듈의 요청에 따라 상기 수위 측정 결과를 표시하도록 상기 발광 다이오드부를 제어하는 수위 측정 제어부를 포함하는 것을 특징으로 하는 수위 측정 시스템.
- 제 7항에 있어서, 상기 수위 표시 장치에서,단위 길이의 기본 플레이트가 복수 개 연결되며, 상기 기본 플레이트는 복수의 발광 다이오드로 이루어져 수위 측정 결과를 눈금과 숫자로 표시하는 바 타입 표시부와 숫자 타입 표시부를 포함하는 것을 특징으로 하는 수위 측정 시스템.
- 제 7항에 있어서, 상기 수위 표시 장치는,결빙 방지용 열선이 형성되어 있는 결빙 방지부를 더 포함하는 것을 특징으로 하는 수위 측정 시스템.
- 제 7항에 있어서, 상기 주 제어 모듈은,복수의 수위 표시 장치로부터 수위 측정 결과를 읽어 들이고, 읽어 들인 수위 측정 결과를 종합적으로 분석한 후, 분석 결과에 따라 각 수위 표시 장치로 발광 다이오드를 점등하기 위한 수위 정보를 전달하는 것을 특징으로 하는 수위 측정 시스템.
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CN2009801139748A CN102016964B (zh) | 2008-12-10 | 2009-12-09 | 使用发光二极管显示水位的装置及使用该装置的水位测量系统 |
US12/988,793 US8429967B2 (en) | 2008-12-10 | 2009-12-09 | Water level display device using LED, and water level measurement system including the same |
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KR10-2008-0125328 | 2008-12-10 | ||
KR1020080125328A KR100989054B1 (ko) | 2008-12-10 | 2008-12-10 | 발광 다이오드를 이용한 수위 표시 장치 및 그를 포함한 수위 측정 시스템 |
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WO2010068036A2 true WO2010068036A2 (ko) | 2010-06-17 |
WO2010068036A3 WO2010068036A3 (ko) | 2010-09-10 |
WO2010068036A9 WO2010068036A9 (ko) | 2010-10-28 |
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US (1) | US8429967B2 (ko) |
KR (1) | KR100989054B1 (ko) |
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US20110030470A1 (en) | 2011-02-10 |
WO2010068036A9 (ko) | 2010-10-28 |
CN102016964A (zh) | 2011-04-13 |
WO2010068036A3 (ko) | 2010-09-10 |
CN102016964B (zh) | 2013-03-27 |
KR20100066840A (ko) | 2010-06-18 |
US8429967B2 (en) | 2013-04-30 |
KR100989054B1 (ko) | 2010-10-25 |
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