KR20160058633A - Apparatus and method for water level measurement of evaporimeter - Google Patents

Apparatus and method for water level measurement of evaporimeter Download PDF

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Publication number
KR20160058633A
KR20160058633A KR1020140160356A KR20140160356A KR20160058633A KR 20160058633 A KR20160058633 A KR 20160058633A KR 1020140160356 A KR1020140160356 A KR 1020140160356A KR 20140160356 A KR20140160356 A KR 20140160356A KR 20160058633 A KR20160058633 A KR 20160058633A
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KR
South Korea
Prior art keywords
ultrasonic
water level
reflected
ultrasonic transducer
reference reflector
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KR1020140160356A
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Korean (ko)
Inventor
김봉민
김찬송
장병남
김동채
Original Assignee
코리아디지탈 주식회사
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Priority to KR1020140160356A priority Critical patent/KR20160058633A/en
Publication of KR20160058633A publication Critical patent/KR20160058633A/en

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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
    • G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/908—Material level detection, e.g. liquid level

Abstract

The present invention relates to an apparatus and a method to measure a water level of an evaporimeter and, more specifically, provides an apparatus and a method to measure a water level of an evaporimeter, which measures a water level using ultrasonic waves; and measures the water level of the evaporimeter by applying a velocity of ultrasonic waves calculated based on a reference reflective surface. The apparatus to measure the water level of the evaporimeter comprises: an ultrasonic wave transducer; a reference reflective unit; a control unit; and a calculation unit.

Description

TECHNICAL FIELD [0001] The present invention relates to an evaporative water level measurement apparatus and method,

The present invention relates to an apparatus and method for measuring the level of an evaporation system, and more particularly, to an apparatus and method for measuring the level of an evaporation system by measuring the water level using ultrasonic waves and applying the calculated ultrasonic velocity based on the reference reflection surface And methods.

The process in which liquid or solid water changes into gaseous water is called evaporation, and the amount evaporated is called evaporation. Since the amount of evaporation is the basic element of water circulation in the atmosphere together with precipitation, the status of observation such as increase and decrease of evaporation rate is used as important data in various aspects such as monitoring of climate change, agricultural weather, dam management and change of ecosystem. An evaporator is used to measure the amount of evaporation, and a small evaporator and a large evaporator can be used.

Evaporimeters are the most common method used to directly measure evapotranspiration. They are used to measure the amount of evaporation in cylindrical vessels with a diameter of 20 cm, a depth of 10 cm (small) or a diameter of 120 cm and a depth of 25 cm (large) . The small evaporation system is excellent but the evaporation amount can be obtained by using the good balance balance, and the large evaporation system can measure the change of the water level by the water level measuring apparatus.

As a method of measuring the existing liquid level, a method of detecting the water level by converting the buoyancy change according to the liquid level into the resistance change of the variable resistance by mechanically putting the buoyancy weight into the liquid has been used, and then, A method of detecting the change amount of the buoyancy weight using a load cell capable of measuring the magnitude of the force or a method of detecting the pressure sensor by using a change in pressure by putting it on the bottom of a tank has been developed.

In addition to this, there is a method of utilizing a change in capacitance.

However, most of them have direct contact with the liquid, which not only has a small influence on the detection of buoyancy contained in the liquid for detection, but also has difficulties and inconvenience in the case of contaminated liquids.

Thereafter, a non-contact type ultrasonic detection method has been examined.

Ultrasonic wave is a non-contact type, and it has high observation resolution and long detection distance. It is widely used for measurement of water level in rivers and the like. However, there is a problem that the detection distance is short and the resolution is less than 0.1 mm, the frequency of ultrasonic waves must be increased. , It is necessary to solve the problem of how to minimize or correct the error in the external environment. If not, there is a problem that calibration and correction are needed from time to time.

Korean Patent No. 10-0228410 discloses a fluid level / flow measurement system using a strain gait load cell and a measurement method thereof.

Korean Registered Patent [10-0228410] (Registered Date: Aug. 10, 1999)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a sensor for measuring a water level using ultrasonic waves, And an object of the present invention is to provide an apparatus and method for measuring the level of an evaporation system without affecting the external environment such as temperature, wind, pressure, and the like.

According to another aspect of the present invention, there is provided an apparatus for measuring the level of an evaporator connected to an evaporator water tank, the apparatus comprising: an ultrasonic transducer for transmitting and receiving ultrasonic waves; 100); A reference reflector 200 spaced a predetermined distance from the ultrasonic transducer 100 to reflect ultrasonic waves generated from the ultrasonic transducer 100; A controller 300 connected to the ultrasonic transducer 100 for generating ultrasonic waves in the ultrasonic transducer 100 and storing ultrasonic signals received in the ultrasonic transducer 100; And a controller 300 connected to the reference reflector 200. The controller 200 calculates the velocity of the ultrasonic wave based on the ultrasonic signal reflected by the reference reflector 200 and calculates the water level based on the velocity of the ultrasonic wave and the ultrasonic signal reflected on the water surface And an operation unit (400).

In addition, the controller 300 receives time information and position information from a GPS and stores the information together with the ultrasound signals.

The control unit 300 includes an amplifying unit 310 for amplifying an ultrasonic signal reflected on the reference reflector 200 and an ultrasonic signal reflected on the water surface.

The control unit 300 may classify the ultrasound signals reflected on the reference reflector 200 and the ultrasound signals reflected on the water surface so that the ultrasound signals reflected on the reference reflector 200 and the ultrasound signals reflected on the water surface And a signal classifying unit 320 for storing information.

The control unit 300 may classify the ultrasound signals reflected by the reference reflector 200 by adjusting the measurement distance of the ultrasound signals based on the distance between the ultrasound transducer 100 and the reference reflector 200, And the ultrasonic signal reflected on the water surface is classified by adjusting the measurement distance of the ultrasonic signal based on the distance between the ultrasonic transducer 100 and the water surface.

The control unit 300 may classify the ultrasonic wave reflected from the ultrasonic wave reflected from the ultrasonic transducer 100 into an ultrasonic signal reflected by the reference reflector 200 and transmit the ultrasonic wave reflected from the ultrasonic transducer 100 The ultrasonic wave reflected from the ultrasonic wave reflected from the ultrasonic wave reflected from the ultrasonic wave reflected by the ultrasonic wave reflected by the ultrasonic wave reflected from the water surface is classified into the ultrasonic wave reflected on the water surface.

The evaporator water level measuring apparatus is characterized in that it repeatedly measures n times (n is a natural number) for a predetermined time and performs averaging processing to calculate a final water level.

The evaporator water level measuring apparatus includes a temperature sensor 500 for measuring the temperature of the water, and the calculating unit 400 corrects the water level change amount based on the temperature value measured from the temperature sensor 500 .

An apparatus and method for measuring the level of an evaporator according to an embodiment of the present invention includes an ultrasonic transducer 100, a reference reflector 200, a controller 300, and a calculator 400, (S10) of calculating an ultrasonic velocity based on an ultrasonic signal reflected on the reference reflector (200); And a water level calculating step (S20) of calculating a water level based on the speed of the ultrasonic wave calculated in the ultrasonic velocity calculating step (S10) and the ultrasonic signal reflected on the water surface.

According to the apparatus and method for measuring the level of an evaporator according to an embodiment of the present invention, by measuring the water level based on the ultrasonic velocity in the current environment by using the reference reflector, the temperature, wind, It has the effect of measuring accurate water level irrespective of the environment.

Also, even if the periodic calibration is not performed, it is possible to measure the water level accurately regardless of the external environment by measuring the water level based on the ultrasonic velocity in the current environment using the reference reflector.

Also, there is an effect that data such as evaporation amount map can be processed by using a plurality of evaporation water level measuring devices by storing time information and position information from the GPS and storing and managing the data together with the ultrasonic signals.

In addition, by amplifying the received ultrasonic signal by the amplifying unit, more accurate water level can be measured.

In addition, by separating and storing the signal through the signal classifying unit, it is possible to measure the water level by using one ultrasonic transducer.

Also, by calculating the final water level as an average of the data repeatedly measured for a predetermined period of time, the effect of short-term fluctuation of the meteorological condition can be minimized.

Further, by correcting the water level change amount based on the temperature value measured from the temperature sensor 500, it is possible to measure a more accurate water level.

In addition, the present invention has the effect of measuring the level or liquid level with a detection range of less than 200 mm, with an uncertainty of less than or equal to 1 mm, with resolution of less than 0.1 mm using ultrasonic waves.

1 to 4 are conceptual diagrams of an evaporator water level measuring apparatus according to an embodiment of the present invention.
5 is a flowchart of an evaporator water level measurement apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concept of the term appropriately in order to describe its own invention in the best way. The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Further, it is to be understood that, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Descriptions of known functions and configurations that may be unnecessarily blurred are omitted. The following drawings are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms. In addition, like reference numerals designate like elements throughout the specification. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible.

FIGS. 1 to 4 are conceptual diagrams of an evaporative water level measuring apparatus according to an embodiment of the present invention, and FIG. 5 is a flowchart of an evaporative water level measuring apparatus according to an embodiment of the present invention.

Prior to the description, the terms used in this specification (and claims) will be briefly described.

"Water level" refers to the height of the water, and in other words, it is sometimes referred to as water surface, liquid surface or liquid level.

What the World Meteorological Organization calls a standard evaporator is the American evaporator (USA, class A pan). This evaporator has a diameter of 120.7 cm and a depth of 25 cm. Currently, the Korea Meteorological Administration (KMA) observes the amount of evaporation at 09:00 (00 UTC) and measures the water level based on when the end of the hook reaches the water surface by using a hook gauge, and measures the water level After the water temperature is corrected by the temperature, the observation value and the difference of the previous day are obtained and used as the observation period value. The water around the hook is wrapped around the hook to prepare for the case where it is difficult to measure the water level accurately due to the ripples occurring in the evaporation system. When the rain has fallen, the evaporation amount is obtained by subtracting the amount of rain.

In general, a large evaporator is placed on a wooden support plate with water at a depth of about 20 cm so that its bottom is 3 to 5 cm away from the ground. Also, be careful not to let rain water spill out by planting turf around the evaporator system. The material should be painted with zinc plated iron plate or stainless steel, and the inside and outside of the boats should be painted white.

Water is replenished every time the water level falls more than 2.5 cm, and large evaporators are installed on the field, so dust, leaves, insects, etc. are frequently immersed in the water, so they should be removed after observation or clean water should be exchanged.

When the surface of the water freezes in winter, it is not possible to measure the amount of evaporation. In addition, the evaporator itself may be destroyed.

1, an apparatus for measuring the level of an evaporator according to an embodiment of the present invention includes an ultrasonic transducer 100, a reference reflector 100, A control unit 300, and an operation unit 400.

The evaporation system water tank 10 observes an amount of evaporation of water in a predetermined time unit after water is automatically or manually filled to a predetermined water level. At this time, the amount of evaporation of the water is measured by the change of the water level, and the change of the water level is measured by using the evaporator water level measuring apparatus according to the embodiment of the present invention, which is connected to the evaporation water tank 10, .

The connecting pipe is preferably horizontally coupled to the lower portion of the evaporator water tank 10 in general. This is to make the water surface of the evaporation system water tank 10 and the evaporation water level measuring apparatus have the same height.

The apparatus for measuring the level of an evaporator according to an embodiment of the present invention is preferably constructed so as to be shielded from the outside except for a connection pipe in order to avoid being influenced by external wind or water surface shaking.

The ultrasonic transducer 100 is a transducer that converts AC energy of 20 kHz or more into mechanical vibration of the same frequency, and transmits and receives ultrasonic waves by applying a piezoelectric effect or a magnetostrictive effect.

The reference reflector 200 is spaced apart from the ultrasonic transducer 100 by a predetermined distance and reflects some of the ultrasonic waves generated from the ultrasonic transducer 100. In other words, the ultrasonic waves reaching the reference reflector 200 are reflected.

Since the ultrasonic wave has characteristics that the velocity varies depending on the wind intensity, the temperature of the medium, the pressure of the medium, and so on, the measurement error is caused according to the surrounding environment. In order to solve this problem, it is possible to confirm the moving speed of the current ultrasonic wave by using the ultrasonic waves reflected on the reference reference reflector 200 which already knows the correct distance.

That is, since the error of the level measurement is generated only by the ultrasound information reflected on the water surface, the reference reflector 200 is used to accurately check the speed of the ultrasonic wave in the current environment.

The control unit 300 is connected to the ultrasonic transducer 100 and generates ultrasonic waves in the ultrasonic transducer 100 and stores the ultrasonic signals received in the ultrasonic transducer 100.

The controller 300 includes a central processing unit (CPU) capable of processing digital signals, a converter (ADC) for converting an analog signal received from the ultrasonic transducer 100 into a digital signal, a water level measurement algorithm, A memory, and a digital communication interface capable of transmitting and receiving the level measurement data.

For example, the CPU generates an ultrasonic signal (60 kHz) for controlling the ultrasonic transducer 100, amplifies the signal to a high voltage, and transmits the amplified signal to the ultrasonic transducer 100 to generate ultrasonic waves have. The ultrasonic transducer 100 receives the signal of the ultrasonic wave reflected from the object and transmits the ultrasonic wave to the ADC. Then, the signal is converted into the digital signal by the ADC and stored in the memory. Preferably, the ADC is configured to convert at precise time intervals.

The data converted to a digital signal can be used to calculate and calibrate the distance through signal processing. In addition, the measured result can be transmitted to a remote site via a communication port or stored in a memory.

At this time, the controller 300 receives the time information and the position information from the GPS and stores the time information and the position information together with the ultrasound signal. This is because the evaporator water level measuring devices are distributed in each region, and in order to manage them integrally, it is preferable that the time information and the position information are stored together with the ultrasonic signals.

2, the control unit 300 of the apparatus for measuring the level of an evaporator according to an embodiment of the present invention includes an amplifying unit 300 for amplifying an ultrasonic signal reflected on a reference reflector 200 and an ultrasonic signal reflected on a water surface, (Not shown).

The amplification unit 310 may use an energy amplifier or an ultrasonic resonance structure without energy consumption.

3, the control unit 300 of the evaporator water level measuring apparatus according to an embodiment of the present invention may classify the ultrasound signals reflected on the reference reflector 200 and the ultrasound signals reflected on the water surface, And a signal classifying unit 320 for storing information on the ultrasonic signals reflected on the reflection unit 200 and the ultrasonic signals reflected on the water surface, respectively.

In other words, the ultrasonic velocity in the current environment is calculated using the ultrasonic signal reflected by the reference reflector 200, and the ultrasonic velocity in the reference reflector 200 is measured in order to measure the water level using the ultrasonic signal reflected on the water surface It is necessary to classify the reflected ultrasonic signal and the ultrasonic signal reflected on the water surface.

- First Embodiment for Classifying Ultrasonic Signal (Based on Measured Distance of Ultrasonic Signal)

The control unit 300 may classify the reflected ultrasound signals in the reference reflector 200 by adjusting the measurement distance of the ultrasound signals based on the distance between the ultrasound transducer 100 and the reference reflector 200, And the ultrasonic signal reflected on the water surface is classified by adjusting the measurement distance of the ultrasonic signal based on the distance between the transducer 100 and the water surface.

In other words, the ultrasonic velocity in the current environment can be calculated by adjusting the measurement distance of the ultrasonic signal based on the distance between the ultrasonic transducer 100 and the reference reflector 200 to generate ultrasonic waves, The water level can be calculated by adjusting the measurement distance of the ultrasonic signal based on the distance between the ultrasonic transducer 100 and the water surface to generate ultrasonic waves.

- Second embodiment for classifying ultrasonic signals (based on arrival time of ultrasonic signals)

The control unit 300 classifies the first ultrasonic wave reflected from the ultrasonic wave reflected from the ultrasonic transducer 100 into an ultrasonic signal reflected by the reference reflection unit 200 and outputs the ultrasonic wave reflected from the ultrasonic transducer 100 The ultrasound wave reflected from the generated ultrasound wave is classified into an ultrasound wave reflected on the water surface.

In other words, the ultrasonic velocity in the current environment can be calculated based on the first received ultrasonic signal, and then the water level can be calculated based on the ultrasonic signal inputted later.

The operation unit 400 is connected to the control unit 300 and calculates the velocity of the ultrasonic wave based on the ultrasonic signals reflected by the reference reflection unit 200. Based on the velocity of the ultrasonic waves and the ultrasonic signals reflected on the water surface Calculate the water level.

That is to say, the reciprocating distance (A × 2 in FIG. 1) between the ultrasonic transducer 100 and the reference reflector 200, which is already known, is calculated by starting from the ultrasonic transducer 100 to the reference reflector 200 can be calculated by dividing the ultrasonic signal reflected by the ultrasonic transducer 200 by the time of reaching the ultrasonic transducer 100. The speed of the ultrasonic wave in the current environment can be calculated and stored in the storage means and managed.

When the time when the ultrasonic signal reflected from the surface of the ultrasonic transducer 100 is reflected to the ultrasonic transducer 100 is divided by the speed of the ultrasonic wave in the current environment, the ultrasonic transducer 100, The reciprocating distance between the water surfaces (B x 2 in Fig. 1) can be known.

That is, based on the ultrasonic velocity and the arrival time of ultrasonic waves reflected on the water surface, it is possible to measure the height of the accurate water surface without being influenced by the wind intensity, temperature, and pressure change.

In other words, there is no need to perform periodic calibration to minimize the uncertainty increase due to the aged change of the ultrasonic device due to long use.

The apparatus for measuring the level of an evaporator according to an embodiment of the present invention may be characterized in that it repeatedly measures n times (n is a natural number) for a predetermined time and then performs an average process to calculate a final water level.

In other words, the uncertainty can be lowered by calculating the final water level as an average of repeatedly measured data over a period of time.

4, the apparatus for measuring the level of an evaporator according to an embodiment of the present invention includes a temperature sensor 500 for measuring the temperature of water, And the water level change amount is corrected based on the temperature value.

The water has a characteristic that the volume varies with temperature, and therefore, it is desirable to correct the evaporation amount calculation value based on the water temperature value.

5, an evaporation system water level measurement method according to an embodiment of the present invention includes an ultrasonic transducer 100, a reference reflector 200, a controller 300, and an operation unit 400, The apparatus includes an ultrasonic velocity calculation step (S10) and a water level calculation step (S20).

The ultrasonic velocity calculation step S10 calculates the velocity of the ultrasonic wave based on the ultrasonic signal reflected on the reference reflector 200. [

At this time, it is possible to obtain current time and position information through GPS, filter unwanted interference signals, and select valid signals from ultrasonic transmission and reflected signals.

The current environment (temperature, humidity, wind, pressure, etc.) is calculated based on the ultrasonic signals reflected on the reference reflector 200 and the distance between the ultrasonic transducer 100 and the reference reflector 200, It is possible to calculate the speed of the ultrasonic waves in the ultrasonic waves.

The water level calculation step S20 calculates the water level based on the speed of the ultrasonic wave calculated in the ultrasonic velocity calculation step S10 and the ultrasonic signal reflected on the water surface.

In other words, by calculating the velocity of the ultrasonic wave in the current environment, the distance (the distance between the ultrasonic transducer 100 and the water surface) of the liquid to be measured can be calculated, and the water level can be calculated based on the distance.

For example, low-frequency noise can be removed by using a high-pass filter with a received ultrasonic signal of 10 KHz or more. In addition, a signal corresponding to an ultrasonic frequency (60 KHz) can be filtered using a band pass filter. In addition, if the signal size is normalized, and the signal is maximally integrated by performing the interval integration, a position having the same phase as the corresponding frequency at the detected maximum point can be recalculated, and the velocity of the ultrasonic wave at this point The final distance can be calculated.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Ultrasonic transducer
200: reference reflector
300:
310:
320: Signal classifier
400:
500: Temperature sensor
S10: Ultrasonic velocity calculation step
S20: Level calculation step

Claims (9)

An evaporation system water level measuring apparatus connected to an evaporation system water tank (10) for measuring a water level,
An ultrasonic transducer (100) for transmitting and receiving ultrasonic waves;
A reference reflector 200 spaced a predetermined distance from the ultrasonic transducer 100 to reflect ultrasonic waves generated from the ultrasonic transducer 100;
A controller 300 connected to the ultrasonic transducer 100 for generating ultrasonic waves in the ultrasonic transducer 100 and storing ultrasonic signals received in the ultrasonic transducer 100; And
An operation unit which is connected to the control unit 300 and calculates a velocity of the ultrasonic wave based on the ultrasonic signal reflected by the reference reflection unit 200 and calculates a water level based on the velocity of the ultrasonic wave and the ultrasonic signal reflected on the water surface, (400);
And an evaporator water level measuring device.
The method according to claim 1,
The control unit 300
Wherein the time information and the position information are received from the GPS and stored together with the ultrasonic signal.
The method according to claim 1,
The control unit 300
An amplifying unit 310 for amplifying the ultrasound signal reflected on the reference reflector 200 and the ultrasound signal reflected on the water surface;
And an evaporator water level measuring device.
The method according to claim 1,
The control unit 300
A signal classifying unit for classifying the ultrasound signals reflected on the reference reflector 200 and the ultrasound signals reflected on the water surface and storing the ultrasound signals reflected on the reference reflector 200 and the ultrasound signals reflected on the water surface, (320);
And an evaporator water level measuring device.
5. The method of claim 4,
The control unit 300
The ultrasonic transducer 100 may classify the ultrasonic signal reflected by the reference reflector 200 by adjusting the measurement distance of the ultrasonic signal based on the distance between the ultrasonic transducer 100 and the reference reflector 200,
Wherein an ultrasonic signal reflected on the water surface is classified by adjusting a measurement distance of the ultrasonic signal based on the distance between the ultrasonic transducer (100) and the water surface.
5. The method of claim 4,
The control unit 300
The ultrasonic wave reflected from the ultrasonic wave generated from the ultrasonic transducer 100 is classified into ultrasonic waves reflected by the reference reflector 200,
Wherein the ultrasound wave reflected from the ultrasonic wave generated from the ultrasonic transducer (100) is classified into ultrasound waves reflected from the water surface.
The method according to claim 1,
The evaporator water level measuring apparatus
(N is a natural number) repeatedly measured for a predetermined time, and then averaging is performed to calculate a final water level.
The method according to claim 1,
The evaporator water level measuring apparatus
A temperature sensor (500) for measuring the temperature of water;
/ RTI >
Wherein the operation unit (400) corrects the water level change amount based on the temperature value measured by the temperature sensor (500).
A method for measuring an evaporator water level using an evaporator water level measuring apparatus including an ultrasonic transducer (100), a reference reflector (200), a control unit (300) and an operation unit (400)
An ultrasonic velocity calculating step (S10) of calculating an ultrasonic velocity based on the ultrasonic signal reflected on the reference reflector 200; And
A water level calculating step (S20) of calculating a water level based on the speed of the ultrasonic wave calculated in the ultrasonic velocity calculating step (S10) and the ultrasonic signal reflected on the water surface;
Wherein the water level is measured by an evaporator.
KR1020140160356A 2014-11-17 2014-11-17 Apparatus and method for water level measurement of evaporimeter KR20160058633A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106643979A (en) * 2016-12-23 2017-05-10 重庆川仪自动化股份有限公司 Automatic compensation method and device for guided wave radar level meter measured value
CN110763311A (en) * 2019-12-03 2020-02-07 中环天仪（天津）气象仪器有限公司 Automatic detection equipment and detection method for ultrasonic evaporation sensor
KR102101035B1 (en) 2019-12-04 2020-04-20 주식회사 에이치큐테크 Evaporimeter
KR20200048726A (en) * 2018-10-30 2020-05-08 코리아디지탈 주식회사 Fermented wine alcohol concentration measurement device using ultra sonic wave
KR20210084043A (en) * 2019-12-27 2021-07-07 한국전자기술연구원 Sensor module for sensing water level and control method the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106643979A (en) * 2016-12-23 2017-05-10 重庆川仪自动化股份有限公司 Automatic compensation method and device for guided wave radar level meter measured value
KR20200048726A (en) * 2018-10-30 2020-05-08 코리아디지탈 주식회사 Fermented wine alcohol concentration measurement device using ultra sonic wave
CN110763311A (en) * 2019-12-03 2020-02-07 中环天仪（天津）气象仪器有限公司 Automatic detection equipment and detection method for ultrasonic evaporation sensor
KR102101035B1 (en) 2019-12-04 2020-04-20 주식회사 에이치큐테크 Evaporimeter
KR20210084043A (en) * 2019-12-27 2021-07-07 한국전자기술연구원 Sensor module for sensing water level and control method the same

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