KR20120135663A - A wind direction and speed measurement equipment using the piezo sensor - Google Patents

A wind direction and speed measurement equipment using the piezo sensor Download PDF

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Publication number
KR20120135663A
KR20120135663A KR1020110054499A KR20110054499A KR20120135663A KR 20120135663 A KR20120135663 A KR 20120135663A KR 1020110054499 A KR1020110054499 A KR 1020110054499A KR 20110054499 A KR20110054499 A KR 20110054499A KR 20120135663 A KR20120135663 A KR 20120135663A
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South Korea
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wind direction
wind
wind speed
piezo
speed measurement
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KR1020110054499A
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Korean (ko)
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최중경
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창원대학교 산학협력단
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Publication of KR20120135663A publication Critical patent/KR20120135663A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10554—Moving beam scanning
    • G06K7/10594—Beam path
    • G06K7/10603—Basic scanning using moving elements
    • G06K7/10633—Basic scanning using moving elements by oscillation
    • G06K7/10643—Activating means
    • G06K7/10653—Activating means using flexible or piezoelectric means

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • Theoretical Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Health & Medical Sciences (AREA)
  • Power Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

PURPOSE: A wind direction and speed measurement system using piezo sensors is provided to measure weather for ocean environment and to improve transportability. CONSTITUTION: A wind direction and speed measurement system includes a wind direction and speed measuring module(10), an interface circuit part(20), a digital signal processor(30), a wind direction and speed displaying part(40), a temperature measuring module(50), and a power part(60). The wind direction and speed measuring module measures the direction and the intensity of wind using four thin film type piezo sensors(11). The interface circuit part transmits signals output from the sensors to the digital signal processor. The digital signal processor includes a converter(31), a calculating part(32), serial communication interface, and serial peripheral component interface. The wind direction and speed displaying part displays wind direction and speed data. The temperature measuring module exchanges data of atmospheric temperature and atmospheric pressure. [Reference numerals] (11) Piezo sensor 1-4; (20) Interface circuit part; (31) A/D converter; (32) Wind direction and speed calculating part; (40) Wind direction and speed displaying part; (50) Atmospheric pressure/peripheral atmospheric temperature measuring module; (60) Power part

Description

Wind direction wind speed measurement system using piezo sensor {A wind direction and speed measurement equipment using the piezo sensor}

According to the present invention, the wind direction wind speed measurement module is configured by using a piezo sensor, and thus it is possible to configure a compact, lightweight, and low-cost system. By arranging a cylindrical housing and a plurality of corrugated piezo sensors around it, the wind speed can be measured according to the degree to which the piezo sensor vibrates by the wind, By measuring and comparing the vibration caused by the wind in the 360 ° direction using four thin-film piezo sensors, the direction and intensity of the wind can be measured and compared with the conventional RTD (Resistive Temperature Detector). No additional sensors are required, which makes the system lighter and uses an economical piezo sensor. A description of the direction of the wind velocity measurement system.

In order to move the information system supporting the advanced information society, a device that collects and inputs information from the outside is required. Such a device is called a sensor. Sensors have emerged as a core technology leading the information revolution, which has a profound effect on the industry and our daily lives, and the role of sensors in the information society is enormous. A sensor is defined as a "device that senses or measures from a measurement object and converts its measurand into an electrical signal." In this case, software (S / W) and hardware (H / W) technologies related to extracting information from a measurement object are referred to as sensor technology.

In order to obtain necessary information from various external signals, a sensor having a selectivity for a particular phenomenon is required. In this case, the selection methods are classified into physical sensors using physical effects, and chemical sensors using chemical effects ( chemical sensors, bio sensors using biometrics, and the like. Biosensor is a kind of chemical sensor in principle, but it is a sensor to compensate for the low selectivity of chemical sensor by using the excellent identification ability of living body.

In general, in order to realize the selectivity of the sensor, the sensor is manufactured by combining two or more features such as characteristics, structure, and signal processing method of the sensor material. The reason for converting the necessary information into an electrical signal is that signal processing such as amplification, feedback, filtering, differential, and storage is simple and the information can be transmitted to a physically distant place. .

The design technology of sensor system, which replaces human sense and judgment, is oriented toward a multifunctional, complex and miniaturized form compared to the conventional ones according to the trend of light and short reduction of all electronic components, and it is modern semiconductor manufacturing technology that enables this. And digital technology.

The meteorological measurement system is an observation system that measures atmospheric temperature, atmospheric pressure, wind direction, and the like as one of such sensor systems. In the conventional case, as shown in FIG. 1, a wind direction wind speed measurement module using an RTD is used. Measurement method of the wind direction wind speed measurement module using RTD (Resistive Temperature Detector) of Figure 1 is a platinum RTD temperature sensor (1, 2, 3) of PT100Ω around a metal cylinder heated to a constant temperature by a film-type heating coil (5). , 4) are arranged at intervals of 90 °, and the wind direction wind speed is measured by measuring the cooling effect by the wind in each direction as the temperature change. This method is a robust measurement module that can be used even in environments with poor environmental resistance such as vibration, dust, and humidity. A good measurement result can be obtained only when the cooling effect is compensated by the ambient air temperature and atmospheric pressure measurement. Since (1, 2, 3, 4) must be used and additional devices such as a film type heating coil 5 and a heater controller are required, there is a problem that the system is expensive and heavy to construct.

Therefore, by configuring the wind direction wind speed measurement module using the piezo sensor, it is possible to configure it as a compact, lightweight and inexpensive system, so that it is easy to move and can be applied to the measurement of the meteorological environment for marine environment measurement, which has good responsiveness to the measurement environment. In addition, four thin-film piezoelectric sensors measure vibrations caused by wind in the 360 ° direction and compare them to measure wind direction and intensity, as well as additional sensors compared to conventional RTDs (Resistive Temperature Detector). Since it is not necessary to reduce the weight of the system, the development of an economic wind speed measurement system using an economical piezo sensor is urgently required.

Accordingly, the present invention was conceived to solve the above problems, and by constructing a wind direction wind speed measurement module using a piezo sensor, it is possible to configure a compact, lightweight and inexpensive system, which is easy to move and responds to the measurement environment. It is an object of the present invention to provide a wind direction wind speed measurement system using a piezo sensor that can be applied to the measurement of the gaseous phase for good marine environment measurement.

Another object of the present invention is to arrange a cylindrical housing and a plurality of pleated piezo sensors around the cylindrical housing, so that the wind speed can be measured according to the degree to which the piezo sensor vibrates by the wind, as well as the wind direction. The present invention provides a wind direction wind speed measurement system using a piezo sensor that can be determined as an example.

Another object of the present invention is to measure the vibration by the wind in the 360 ° direction using four thin-film piezo sensor and compare it, to measure the direction and strength of the wind as well as using the conventional RTD (Resistive Temperature Detector) Compared to this, no additional sensors are required, so the system can be lightened and provide an economic wind speed measurement system using an economical piezo sensor.

Wind direction wind speed measurement system using a piezo sensor according to a preferred embodiment of the present invention for achieving the above object is to measure the vibration caused by the wind in the 360 ° direction using four thin-film piezo sensor and the vibration from the four piezo sensor Wind direction wind speed measurement module for measuring the direction and intensity of the wind in comparison with; An interface circuit unit which receives four analog output signals from the wind direction wind speed measurement module and transmits them to a signal processor; An analog-to-digital converter for converting voltage values of the four analog signals from the interface circuit unit into a value of a digital signal, and a combination of the four digital signals output from the analog-digital converter into a vector value of a two-axis rectangular coordinate system; The wind direction calculation unit for calculating wind direction and wind speed, a serial communication interface (SCI) for transmitting the calculated data from the wind direction calculation unit to the wind direction wind speed display unit, and a module for measuring atmospheric pressure and ambient air temperature. A signal processor including a serial peripheral interface (SPI) for exchanging data with each other; A wind direction wind speed display unit for receiving and displaying wind direction wind speed data from a serial communication interface (SCI) in the signal processor; An atmospheric pressure ambient air temperature measurement module connected to the real peripheral device interface (SPI) and exchanging atmospheric pressure and ambient air temperature data; A power supply unit supplying power to the wind direction wind speed measurement module, the interface circuit unit, the signal processing unit, the wind direction wind speed display unit, and the atmospheric pressure ambient air temperature measurement module; .

In the present invention, the signal processing unit is 150MIPs, 32-bit class, characterized in that it comprises using a high-speed digital signal processor (DSP) with a 12-bit (16 channels) AD converter as a main processor .

In the present invention, the wind direction wind speed measuring module is characterized in that it comprises a cylindrical housing and a plurality of piezo (Piezo) sensor of the pleat shape around it.

In the present invention, the piezo sensor is characterized in that the precision of the wind direction determination increases as the number of sensors increases even.

As described above, the wind direction wind speed measurement system using the piezo sensor according to the present invention has the following effects.

First, the present invention is composed of a wind direction wind speed measurement module using a piezo sensor, it is possible to configure a compact, lightweight and low-cost system is easy to move, as well as good response to the measurement environment of the marine environment measurement weather measurement Applicable to

Second, the present invention, by placing a cylindrical housing and a plurality of corrugated piezo sensors around it, it is possible to measure the wind speed according to the degree to which the piezo sensor vibrates by the wind, as well as vector direction Can be determined.

Third, the present invention measures the vibration by the wind in the 360 ° direction using four thin-film piezo sensor and compares it, as well as measuring the direction and intensity of the wind as well as using the conventional RTD (Resistive Temperature Detector) In comparison, no additional sensors are required, making the system lighter and more economical.

1 is a view showing the structure of a wind direction wind speed measurement module using a conventional RTD.
2 is a view showing a right angle arrangement structure and a mounting shape of a wind direction wind speed module using a piezo sensor according to an embodiment of the present invention.
Figure 3 shows an equivalent circuit of the piezo film according to an embodiment of the present invention.
4 illustrates an equivalent circuit and an output voltage including a load according to an embodiment of the present invention.
5 is a view showing the configuration of a wind direction wind speed measurement system using a piezo sensor according to an embodiment of the present invention.
6 is a view showing the effect of the arrangement and wind of the piezo sensor according to an embodiment of the present invention.
7 is a view showing a wind direction vector generated when an array of two-axis rectangular coordinate systems of a piezo sensor according to an embodiment of the present invention is employed.

Looking at the preferred embodiment of the present invention together with the accompanying drawings as follows, when it is determined that the detailed description of the known art or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention The description will be omitted, and the following terms are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators, and the definitions refer to a wind direction wind speed measurement system using a piezo sensor according to the present invention. It should be made based on the contents throughout the specification to be described.

Hereinafter, with reference to the accompanying drawings will be described in detail a wind direction wind speed measurement system using a piezo sensor according to an embodiment of the present invention.

2 is a view showing a right angle arrangement structure and a mounting shape of a wind direction wind speed module using a piezo sensor according to an embodiment of the present invention, Figure 5 is a wind direction wind speed measurement system using a piezo sensor according to an embodiment of the present invention It is a figure which shows a structure.

As shown in FIG. 2 and FIG. 5, the wind direction wind speed measurement system using the piezo sensor measures vibrations caused by wind in a 360 ° direction using four thin film type piezo sensors and compares the vibrations from the four piezo sensors. Wind direction wind speed measurement module 10 for measuring the direction and strength of the wind; An interface circuit unit 20 which receives four analog output signals from the wind direction wind speed measurement module and transmits them to a signal processor; An analog-to-digital converter 31 for converting voltage values of the four analog signals from the interface circuit unit into a value of a digital signal, and a vector of a two-axis rectangular coordinate system as values of four digital signals output from the analog-digital converter; A wind direction wind speed calculation unit 32 for synthesizing the wind direction and the wind speed by synthesizing the values, a serial communication interface (SCI) 33 for transmitting the calculated data from the wind direction wind speed calculation unit to the wind direction wind speed display unit, atmospheric pressure and ambient atmosphere A signal processor 30 connected to a module for measuring temperature and including a serial peripheral interface (SPI) 34 for exchanging data with each other; Wind direction wind speed display unit 40 for receiving and displaying the data of the wind direction wind speed from the serial communication interface (SCI) in the signal processor; An atmospheric pressure ambient air temperature measurement module (50) connected to the real peripheral device interface (SPI) and exchanging data of atmospheric pressure with ambient air temperature; A power supply unit 60 for supplying power to the wind direction wind speed measurement module, the interface circuit unit, the signal processing unit, the wind direction wind speed display unit, and the atmospheric pressure ambient air temperature measurement module; Respectively.

Looking at the function of the main technical means of the wind direction wind speed measurement system using a piezo sensor according to an embodiment of the present invention with reference to Figures 2 and 5 as follows.

The wind direction wind speed measurement module 10 measures vibrations caused by wind in a 360 ° direction using four thin film type piezo sensors and measures wind direction and intensity by comparing vibrations emitted from four piezo sensors. Here, the wind direction wind speed measurement module 10 is composed of a cylindrical housing and a plurality of piezo sensors having a corrugated shape around the cylindrical housing. In addition, the precision of the wind direction determination increases as the number of sensors increases evenly.

The interface circuit 20 receives four analog output signals from the wind direction wind speed measurement module and transmits them to the signal processor.

The signal processor 30 includes an analog-to-digital converter 31 for converting voltage values of four analog signals from the interface circuit unit into digital signal values, and values of four digital signals output from the analog-digital converter. Wind direction wind speed calculation section 32 for calculating the wind direction and wind speed by synthesizing the vector values of the two-axis rectangular coordinate system, and a serial communication interface (SCI) 33 for transmitting the calculated data from the wind direction wind speed calculation section to the wind direction wind speed display section. And a serial peripheral interface (SPI) 34 connected to a module for measuring atmospheric pressure and ambient air temperature, and exchanging data with each other. Here, the signal processor 30 is a 150MIPs, 32-bit class, and uses a high-speed digital signal processor (DSP) that includes a 12-bit (16-channel) AD converter as a main processor.

The wind direction wind speed display unit 40 receives and displays the data of the wind direction wind speed from the serial communication interface (SCI) in the signal processor.

The atmospheric pressure ambient air temperature measurement module 50 is connected to the real peripheral interface (SPI), and exchanges data of atmospheric pressure and ambient air temperature.

The power supply unit 60 supplies power to the wind direction wind speed measurement module, the interface circuit unit, the signal processing unit, the wind direction wind speed display unit, and the atmospheric pressure ambient air temperature measurement module.

3 is a diagram illustrating an equivalent circuit of a piezoelectric thin film according to an embodiment of the present invention, and FIG. 4 is a diagram showing an equivalent circuit and an output voltage including a load according to an embodiment of the present invention.

The thin film piezo sensor may be equivalently represented by an electric circuit, as shown in FIG. 3, that is, a charge is generated in proportion to the force applied to the piezo thin film, and the charge is the surface area, dielectric constant, thickness of the thin film. The voltage is generated in proportion to the capacitance shown. If the capacitance of the thin film is constant, the sensor output voltage can range from microvolts to 100 volts depending on the charge generated by external forces. However, since this voltage is maintained only for the time constant considering the load resistance, a steady change in the external applied force is required to generate continuous voltage.

4 shows that the time constant Ri (Cf + Ci) can be adjusted by the addition of the interface circuit, thereby showing the maintenance characteristic of the output voltage.

FIG. 6 is a view illustrating an arrangement of a piezo sensor and influence of wind according to an embodiment of the present invention, and FIG. 7 is a view illustrating a wind direction vector generated when an array of two-axis rectangular coordinate systems of a piezo sensor is employed according to an embodiment of the present invention. The figure shown.

Looking at the measurement principle of the wind direction wind speed using the wind direction wind speed measurement system using a piezo sensor according to an embodiment of the present invention.

The wind vibration effect is measured by four piezoelectric sensors placed on the surface of the metal cylinder. The measured value of this voltage itself shows an alternating current, the amplitude of which determines the strength of the wind. Thus, in the present invention, a circuit for detecting the peak value of the AC waveform after full-wave rectification is designed to direct the vibration effect. In other words, the output of the analog signal processing circuit of each sensor indicates the strength of the vibration effect caused by the wind in each direction. Another configuration of the wind vane is to place a multimeter resistance sensor around the sensor system, which measures the distribution of wind around the metal cylinder. That is, the wind vector field can determine the wind direction in addition to the wind speed. In the present invention, four corrugated piezoelectric sensors are arranged at intervals of 90 ° around the metal cylinder to determine the wind direction. As the number of these sensors increases evenly, the precision of the wind direction determination can be increased.

As shown in FIG. 6, the sensor values due to the wind at 9 o'clock determined by eight piezo sensors are shown.

As shown in FIG. 7, wind intensity values determined by four sensors and a synthetic wind direction vector generated using the same are shown. The wind direction information (opposite direction of the synthesis vector) can be obtained from the synthesis vector, and the wind speed can be seen to be proportional to the length of the vector. The direction of the vector is calculated by a DSP signal processing processor which converts four sensor signals into digital values and then synthesizes the vector values of a two-axis Cartesian coordinate system, wherein the wind direction anemometer described above is at least protected from wind scattered by the housing. Should be.

As described above, the wind direction wind speed measurement system using the piezo sensor can be applied to the measurement of the meteorological for marine environment measurement.

As described above, various substitutions, modifications, and changes can be made by those skilled in the art without departing from the technical spirit of the present invention, and thus, the embodiments and the accompanying drawings are limited. It doesn't happen.

10: wind direction wind speed measurement module 11: piezo sensor
20: interface circuit unit 30: signal processing unit
31: analog-to-digital converter 32: wind direction wind speed calculation unit
33: serial communication interface (SCI)
34: Serial Peripheral Interface (SPI)
40: wind direction wind speed display unit
50: atmospheric pressure ambient air temperature measurement module 60: power supply

Claims (4)

In the wind direction wind speed measurement system using a piezo sensor,
Wind direction wind speed measurement module for measuring the vibration caused by the wind in the 360 ° direction by using the four thin-film piezo sensor and measuring the direction and intensity of the wind by comparing the vibration from the four piezo sensor;
An interface circuit unit which receives four analog output signals from the wind direction wind speed measurement module and transmits them to a signal processor;
An analog-to-digital converter for converting voltage values of the four analog signals from the interface circuit unit into a value of a digital signal, and a combination of the four digital signals output from the analog-digital converter into a vector value of a two-axis rectangular coordinate system; The wind direction wind speed calculation unit for calculating wind direction and wind speed, a serial communication interface (SCI) for transmitting the calculated data from the wind direction wind speed calculation unit, and a module for measuring atmospheric pressure and ambient air temperature. A signal processor including a serial peripheral interface (SPI) for exchanging data with each other;
A wind direction wind speed display unit for receiving and displaying wind direction wind speed data from a serial communication interface (SCI) in the signal processor;
An atmospheric pressure ambient air temperature measurement module connected to the real peripheral device interface (SPI) and exchanging atmospheric pressure and ambient air temperature data;
A power supply unit supplying power to the wind direction wind speed measurement module, the interface circuit unit, the signal processing unit, the wind direction wind speed display unit, and the atmospheric pressure ambient air temperature measurement module; Wind direction wind speed measurement system using a piezo sensor characterized in that it comprises a. The method of claim 1,
The signal processor is a 150MIPs, 32-bit class, using a high-speed DSP (Digital Signal Processor) having a 12-bit (16 channels) AD converter as a main processor, the wind direction wind speed using a piezo sensor Measurement system. The method of claim 1,
The wind direction wind speed measurement module is a wind direction wind speed measurement system using a piezo sensor, characterized in that it comprises a cylindrical housing and a plurality of piezo (Piezo) sensor around the circumference. The method according to claim 1 or 3,
The piezoelectric sensor wind direction wind speed measurement system using a piezo sensor, characterized in that the precision of the wind direction is increased as the number of sensors increases even.
KR1020110054499A 2011-06-07 2011-06-07 A wind direction and speed measurement equipment using the piezo sensor KR20120135663A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014108658A1 (en) 2013-01-10 2014-07-17 Smiths Medical International Limited Flow sensors and apparatus
CN105259369A (en) * 2015-10-27 2016-01-20 国家海洋技术中心 Wind speed and direction measurement instrument
CN106018864A (en) * 2016-04-01 2016-10-12 刘洋宏 Voltage output wind speed sensor voltage signal conversion data module
CN106199059A (en) * 2016-07-28 2016-12-07 无锡信大气象传感网科技有限公司 A kind of Anti-freezing anemobiagraph
CN106226547A (en) * 2016-07-28 2016-12-14 无锡信大气象传感网科技有限公司 A kind of anemoclinograph under wind and snow freezing weather
CN115128296A (en) * 2022-05-17 2022-09-30 广西大学 Marine environment monitoring equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014108658A1 (en) 2013-01-10 2014-07-17 Smiths Medical International Limited Flow sensors and apparatus
CN105259369A (en) * 2015-10-27 2016-01-20 国家海洋技术中心 Wind speed and direction measurement instrument
CN106018864A (en) * 2016-04-01 2016-10-12 刘洋宏 Voltage output wind speed sensor voltage signal conversion data module
CN106199059A (en) * 2016-07-28 2016-12-07 无锡信大气象传感网科技有限公司 A kind of Anti-freezing anemobiagraph
CN106226547A (en) * 2016-07-28 2016-12-14 无锡信大气象传感网科技有限公司 A kind of anemoclinograph under wind and snow freezing weather
CN115128296A (en) * 2022-05-17 2022-09-30 广西大学 Marine environment monitoring equipment

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