KR101526936B1 - Standard Measure Device of Self facilities and Drive Method of the Same - Google Patents

Standard Measure Device of Self facilities and Drive Method of the Same Download PDF

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Publication number
KR101526936B1
KR101526936B1 KR1020140169599A KR20140169599A KR101526936B1 KR 101526936 B1 KR101526936 B1 KR 101526936B1 KR 1020140169599 A KR1020140169599 A KR 1020140169599A KR 20140169599 A KR20140169599 A KR 20140169599A KR 101526936 B1 KR101526936 B1 KR 101526936B1
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South Korea
Prior art keywords
error
class
electrical signal
signal
low
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KR1020140169599A
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Korean (ko)
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정용호
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정용호
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
    • G01B21/045—Correction of measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/02—Details
    • G01C9/06—Electric or photoelectric indication or reading means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G01D18/002—Automatic recalibration
    • G01D18/004—Continuous recalibration

Abstract

An electronic and control measurement technology is disclosed. According to an embodiment of the present invention, a device for measuring standard displacement of a self-facility and an operation method thereof perform processes of converting, amplifying, and filtering magnetic force generated by the movement of a magnet installed in an electric field circuit into an electric force, calibrate an inclination error or the acceleration of gravity for the main body itself placed on a three-dimensional plane using an electric signal detected from the processes, and perform data-conversion on the correction amount into an ASCII code or a current value and outputting the converted correction amount, thereby thoroughly measuring the movement of a structure or a large construction site and correcting an error caused by the measurement.

Description

TECHNICAL FIELD [0001] The present invention relates to a displacement measuring apparatus and a driving method thereof,

In particular, the present invention relates to an electronic and control measurement technique, and more particularly, to a magnetic force generated by the movement of a magnet mounted in an electric circuit, converts the magnetic force into an electric force, amplifies and filters the electric signal, The present invention relates to a self-contained reference displacement measuring apparatus and a driving method thereof, which corrects an inclination error or a gravity acceleration of a main body placed in a main body of a vehicle, and converts the data into ASCII or current values.

In a large construction site or structure, it is necessary to judge the safety of the structure by measuring the displacement. However, existing methods have been in need of a system that needs improvement due to high cost, low precision, inefficiency of maintenance and unsuitable field application.

To overcome this problem, it is necessary to have a high-precision system that is low-cost and suitable for the field.

Displacement is divided into relative displacement and absolute displacement depending on the measurement method. Absolute displacement can measure only the local displacement between measurement points, and it is difficult to measure the displacement amount that the entire structure moves, that is, the relative displacement amount compared with the displacement amount reference point.

In order to measure this, a method of measuring the displacement of the measurement point is used by securing a fixed point in a distance where there is no influence of the displacement of the structure.

This is the measurement and lightwave distance measurement. All of these methods can not measure themselves without anchor points, are very expensive, and have many errors. It is also affected by the weather.

That is, the wavelength is transmitted through the atmosphere, which is affected by the density of light or air. However, since there is no concrete method to overcome this, there is a large error in measurement.

Korean Patent Application Number: 10-2011-0038731 Korean Patent Application Number: 10-2011-0006770 Korean Patent Application Number: 10-2006-0069922 Korean Patent Application Number: 10-2013-0050088

A first aspect of the present invention is to provide a self-reference displacement measuring device and a method of driving the self-reference displacement measuring device according to embodiments of the present invention, Amplifies and filters the generated magnetic force, performs amplification and filtering, and corrects the slope error or gravity acceleration of the main body placed on the three-dimensional body by using the electric signal extracted from the electric signal. By converting the data to the current value and outputting it to the outside, it is possible to precisely measure the behavior of the facility after it is installed on a large construction site or structure, and correct the error accordingly.

Also. The second object of the present invention is to measure the overall movement amount of the structure by using the response value of the sensor itself, so that it is not necessary to secure a separate fixing point and it is not affected by the waiting state.

It is a third object of the present invention to provide a digital signal conversion apparatus and a digital signal conversion apparatus for converting an electrical signal converted and amplified by a force balancing module into AD (converting an analog signal into a digital signal) and DA (converting a digital signal into an analog signal) Precision is to produce and sell products that are superior in terms of integration, which is even better than conventional devices, in order to contribute to corporate profits and related industries.

In order to achieve the above object, the present invention includes the following configuration.

That is, an apparatus for measuring a reference displacement according to an embodiment of the present invention includes: a force balancing module for converting a magnetic force generated by starting a magnet on a coil included in an electric field circuit into an electric force; An amplifier for amplifying the electric force to one of a class A amplification, a class B amplification, and a class C amplification to generate a first electrical signal having any one of an A class voltage value, a B class voltage value, and a C class voltage value; A low-pass analog filter for removing the first high-frequency signal in the first high-frequency band of the first electrical signal and passing only the first low-frequency signal shaken in the first low-frequency band; An AD converter for digitally converting the first electrical signal formed of the first low frequency signal to generate a second electrical signal; A low pass filter for eliminating the second high frequency signal in the second high frequency band of the second electrical signal and passing only the second low frequency signal in the second low frequency band; A first correction for the tilt error of the main body lying on the three-dimensional body using the second electric signal formed by the second low-frequency signal, an error for the gravity acceleration detected through the wired / wireless communication network, A central processing unit for encrypting or characterizing the first and second correction amounts checked in accordance with the first and second correction by an ASCII statement, and outputting the encrypted data to the outside through a serial port; And a DA converter for externally outputting the extracted current value by analog-converting the first and second correction amounts.

The method of driving a self-referenced standard displacement measuring apparatus according to an embodiment of the present invention includes: converting a magnetic force generated by activating a magnet of a coil included in an electric field circuit into an electric force; The amplifier amplifies the electric force to one of A class amplification, B class amplification and C class amplification to generate a first electrical signal having any one of the A class voltage value, the B class voltage value, and the C class voltage value step; Passing a first low frequency signal in the first low frequency band and removing only the first high frequency signal in the first high frequency band of the first electrical signal; Converting the first electric signal formed by the first low-frequency signal into an electrical signal by an AD converter to generate a second electrical signal; Passing a low frequency second harmonic signal in a second low frequency band by removing a second high frequency signal in the second high frequency band of the second electrical signal; The central processing unit first corrects the tilt error of the main body lying on the three-dimensional body using the second electrical signal formed of the second low-frequency signal, or corrects the error of the gravitational acceleration detected through the wired / wireless communication network automatically or manually A second calibration step; The central processing unit encrypts or characterizes the first and second correction amounts checked in accordance with the first and second corrections into an ASCII statement and outputs the encrypted data to the outside through a serial port; And outputting the extracted current value to the outside as the DA converter analog-converts the first and second correction amounts.

The present invention discloses electronic and control metrology techniques. In other words, the apparatus for measuring displacement of own equipment and the driving method thereof according to the embodiment of the present invention perform the process of converting the magnetic force generated by the movement of the magnet mounted in the electric circuit into electric force, amplifying and filtering the electric force, And corrects the tilt error or gravitational acceleration of the main body placed on the three-dimensional surface by using the electrical signal, converts the correction amount to an ASCII statement or a current value, and outputs the converted data to the outside. A first effect which can precisely measure a behavior state of the facility and correct an error according to the result is provided.

Also. The present invention does not need to secure a separate fixing point by measuring the overall movement amount of the structure by using the reaction value of its own sensor and gives a second effect that is not affected by the waiting state.

In addition, the present invention facilitates converting an AD signal (converting an analog signal into a digital signal) and DA (converting a digital signal into an analog signal) and converting the electrical signal converted and amplified by the power balancing module into a very low- It provides a third effect that contributes to corporate profit making and related industry development by mass production and sales of excellent products in terms of improved integration.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an apparatus for measuring a reference displacement according to an embodiment of the present invention. FIG.
2 is a detailed view showing a self-contained reference displacement measuring apparatus according to an embodiment of the present invention.
FIG. 3 is another detailed view showing a self-contained reference displacement measuring apparatus according to an embodiment of the present invention.
FIG. 4 is another detailed view showing a self-contained reference displacement measuring apparatus according to an embodiment of the present invention.
FIG. 5 is another detailed view showing a self-contained reference displacement measuring apparatus according to an embodiment of the present invention.
6 is a flowchart illustrating a method of driving a self-contained facility reference displacement measuring apparatus according to an embodiment of the present invention.

[Example]

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

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an apparatus for measuring a reference displacement according to an embodiment of the present invention. FIG.

Referring to FIG. 1, the self-reference displacement measuring apparatus 1000 converts a magnetic force generated by the movement of a magnet mounted in an electric field circuit into an electric force, performs amplification and filtering, and uses the extracted electric signal Corrects the tilt error or gravity acceleration of the main body placed on the three-dimensional body, converts the data to an ASCII or current value, and outputs it to the outside, thereby precisely measuring the behavior of a large construction site or structure, An amplifier 200, a low-pass analog filter 300, an AD converter 400, a low-pass digital filter 500, a central processing unit 600, A DA converter 700, and a serial port 800.

First, the force balancing module 100 converts a magnetic force generated by starting a magnet on a coil included in an electric field circuit into an electric force.

The amplifier 200 amplifies the electric power to one of A-class amplification, B-class amplification, and C-class amplification to generate a first electrical signal having any one of the A-class voltage value, the B- Respectively.

The amplifier 200 amplifies the electric power to an A-level voltage value showing an efficiency of 40 to 50% using a buffer amplifier that performs Class A amplification, or uses an electric power of 50 to 79 The voltage is amplified with the B-level voltage value indicating the efficiency of the C-level or the C-level voltage value indicating the efficiency of 78 to 95% using the C-level amplification.

The low pass analog filter 300 removes the first high frequency signal in the first high frequency band of the first electrical signal and passes only the first low frequency signal that is contained in the first low frequency band.

The AD converter 400 converts the first electrical signal formed of the first low frequency signal into a digital signal to generate a second electrical signal.

The low-pass digital filter 500 removes the second high frequency signal in the second high frequency band of the second electrical signal and passes only the second low frequency signal in the second low frequency band.

The low-pass analog filter 500 eliminates high-frequency components included in the vibration before measuring an error with respect to vibration to be described below.

The central processing unit 600 applies a second electrical signal formed of the second low-frequency signal to the tilt sensor to precisely measure the tilt error, and then controls the first correction system so that the tilt error on the three- 1 or by applying a second electrical signal to the displacement measurement system to precisely measure the error with respect to the gravitational acceleration detected through the wired and wireless communication network and then to control the second correction system to automatically or manually correct the error for the gravitational acceleration .
The present invention is a precision instrument for precisely measuring a tilt error or a gravitational acceleration error, which is installed in a large construction site or a structure, due to environmental factors, and can accurately measure the behavior of a large construction site or a structure The displacement measuring device is designed to be able to do. In order to prevent this from being affected by the oscillation phenomenon, which is one of the disadvantages elements of the high frequency signal, it is necessary to eliminate the high frequency signals in the first and second order. As a result, the tilt error or the gravitational acceleration error The more accurate numerical data can be obtained and the first and second corrections can be performed so that the confidence interval can be evaluated with a relatively small error range.
The first and second correction amounts checked in accordance with the first and second corrections are encrypted or converted into ASCII texts and output to the outside through the serial port.

It should be noted that the serial port 800 is connected to a cable line including a plurality of copper wires sealed with an epoxy resin, and can output external data, which is encrypted or text-encoded by an ASCII statement.

That is, the central processing unit 600 may be referred to as a control unit, a microcontroller unit (MCU), or a central processing unit (CPU). It may perform various functions according to a hardware design and a software design of a person skilled in the art, Processing speed and judgment ability can be further improved.

2, the central processing unit 600 according to an embodiment of the present invention includes a tilt sensor 610, a displacement measurement system 620, and a tilt sensor 620. The tilt sensor 610 receives a second electric signal formed of a second low- Equipped with 1 and 2 compensators 630 and 640, it is possible to measure and correct precisely, quickly, and accurately the tilt error, gravity acceleration error, vibration error, atmospheric pressure error, temperature error and air resistance error something to do.

However, it is preferable that the central processing unit 600 is connected to the outside of the temperature chamber 650, which is required to obtain an error constant according to the temperature error, although it is possible to measure and correct the error with respect to the temperature confirmed through the wire / wireless communication network 3).

4, the central processing unit 600 includes a tilt sensor 610, a displacement meter 620, and first and second correction gauges 630 and 630 that receive a second electrical signal formed of a second low- 640) may be installed outside to observe and correct tilt error, gravitational acceleration error, vibration error, atmospheric pressure error, temperature error, and air resistance error.

Therefore, regardless of whether the tilt sensor 610, the displacement measurement system 620, and the first and second correction systems 630 and 640 are installed inside or outside, the central processing unit 600 applies a second electrical signal to the tilt sensor 610 to measure a tilt error or a second electrical signal to the displacement meter 620 to measure an error with respect to gravitational acceleration, To correct the tilt error or to control the second correction system 640 to automatically or manually correct the error of the gravity acceleration.

The central processing unit 600 applies a second electric signal to the displacement measurement system 620 to measure an error with respect to the vibration, atmospheric pressure, temperature, or air resistance detected through the wired / wireless communication network, and then outputs a vibration error, The resistance error is automatically or manually corrected using the selected one of the first and second correction systems 630 and 640. [

Here, the displacement measuring system 620 or the external displacement measuring system 620 of the central processing unit 600, whether mounted on the central processing unit 600 or externally installed, If the enclosure is shielded, it can be seen that it can reduce errors in atmospheric pressure or air resistance.

The central processing unit 600 can not be realized in terms of hardware or software to install the temperature chamber 650 only for the purpose of obtaining the temperature constants necessary for the measurement and correction of the temperature error, A temperature chamber 650 is provided in a separate space so that an error constant necessary for temperature error measurement can be obtained (refer to FIG. 5).

The DA converter 700 outputs the extracted current value to the outside as the first and second correction amounts are analog-converted.

The DA converter 700 is connected to another cable line including a plurality of copper wires sealed with an epoxy resin, and outputs a current value having a value of 4 to 20 mA to the outside, like the serial port 800 mentioned above.

FIG. 6 is a view showing a self-contained reference displacement measuring apparatus according to an embodiment of the present invention.

Referring to FIG. 6, a driving method of a self-contained reference displacement measuring apparatus converts magnetic force generated by the movement of a magnet mounted in an electric field circuit into electric force, amplifies and filters the electric signal, The tilt error or the gravitational acceleration of the main body lying on the three-dimensional body is corrected, and the correction amount is converted into an ASCII statement or a current value and output to the outside.

First, the force balancing module converts a magnetic force generated by starting a magnet to a coil included in an electric field circuit into an electric force (S100).

The amplifier amplifies the electric power to one of A-class amplification, B-class amplification, and C-class amplification to generate a first electrical signal having any one of the A-class voltage value, the B-class voltage value, and the C-class voltage value S110).

More specifically, the amplifier uses a buffer amplifier that performs Class A amplification to amplify the electric power to an A-level voltage value showing an efficiency of 40 to 50%, a push-pull amplifier to perform B-class amplification, And amplifying the electric power to a C-level voltage value having an efficiency of 78 to 95% using a multiplier amplifier for performing C-class amplification, and then performing amplification on the electric power .

The low-pass analog filter eliminates the first high frequency signal in the first high frequency band of the first electrical signal and passes only the first low frequency signal in the first low frequency band (S120).

The AD converter (analog-to-digital converter) converts the first electrical signal formed of the first low-frequency signal into a digital signal to generate a second electrical signal (S130).

The low frequency pass filter removes the second high frequency signal in the second high frequency band of the second electrical signal and passes only the second low frequency signal in the second low frequency band (S140).

The central processing unit applies a second electrical signal formed of the second low-frequency signal to the tilt sensor to measure the tilt error, and then controls the first correction system to first correct the tilt error on the three-dimensional body itself.
In addition, the central processing unit may apply a second electrical signal to the displacement measurement system to measure an error with respect to the gravitational acceleration detected through the wired / wireless communication network, and then control the second correction system to automatically or manually correct the error (S150, S160).

The central processing unit encrypts or texts the first and second correction amounts checked in accordance with the first and second corrections into an ASCII statement, and outputs them to the outside through the serial port (S170).

The DA converter (digital-analog converter) outputs the extracted current value to the outside according to the analog conversion of the first and second correction amounts (S180).

In addition, the driving method of the own facility reference displacement measuring apparatus according to the embodiment of the present invention is easy to perform the additional operation as described below.

That is, the central processing unit applies the second electrical signal to the tilt sensor to measure the tilt error or the error to gravity acceleration by applying the second electrical signal to the displacement measurement system, corrects the tilt error using the first correction system, The error of gravity acceleration is automatically or manually corrected.

The central processing unit measures a vibration, an atmospheric pressure, a temperature, or an air resistance which is determined through the wired / wireless communication network by applying a second electric signal to the displacement measurement system, and measures a vibration error, an atmospheric pressure error, To automatically or manually calibrate it.

In addition, the central processing unit, in conjunction with a temperature chamber provided in a separate space, obtains an error constant required for the temperature error.

The low pass analog filter eliminates the high frequency components contained in the vibration before measuring the vibration error, and the displacement measuring system shields the external enclosure so that the external pressure and the external air are blocked, thereby reducing the error in the atmospheric pressure or the air resistance .

The serial port is connected to a cable line containing a large number of copper wires enclosed by an epoxy resin to output large data that is encrypted or text-encoded by an ASCII statement. The DA converter is connected to another cable containing a large number of copper wires sealed with an epoxy resin And outputs a current value having a value of 4 to 20 mA to the outside.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

1000: Displacement measuring device
100: Power balancing module (100) 200: Amplifier
300: Low pass analog filter 400: AD converter
500: low frequency pass digital filter 600: central processing unit
700: DA converter 800: Serial port

Claims (12)

A force balancing module for converting a magnetic force generated by starting a magnet on a coil included in an electric field circuit into an electric force;
An amplifier for amplifying the electric force to one of a class A amplification, a class B amplification, and a class C amplification to generate a first electrical signal having any one of an A class voltage value, a B class voltage value, and a C class voltage value;
A low-pass analog filter for removing the first high-frequency signal in the first high-frequency band of the first electrical signal and passing only the first low-frequency signal shaken in the first low-frequency band;
An AD converter for digitally converting the first electrical signal formed of the first low frequency signal to generate a second electrical signal;
A low pass filter for eliminating the second high frequency signal in the second high frequency band of the second electrical signal and passing only the second low frequency signal in the second low frequency band;
Frequency signal to the tilt sensor to measure a tilt error and then to control the first correction system to first correct the tilt error of the main body lying on the three-
The second electric signal is applied to the displacement measuring system to measure an error with respect to the gravitational acceleration detected through the wired / wireless communication network, and then the second correction system is controlled to automatically or manually correct the error with respect to the gravitational acceleration,
A central processing unit for encrypting or characterizing the first and second correction amounts checked in accordance with the first and second corrections with an ASCII statement and outputting the encrypted data to the outside via a serial port; And
And a DA converter for outputting the extracted current value to the outside by analog-converting the first and second correction amounts.
delete The apparatus according to claim 1,
Atmospheric pressure, temperature, or air resistance through the wired / wireless communication network by applying the second electrical signal to the displacement measurement system, and then measuring a vibration error, an atmospheric pressure error, Automatically or manually compensates with a selected one of the calibrators,
And an error constant according to the temperature error is obtained by utilizing the connected temperature chamber.
The method of claim 3,
The low-pass analog filter removes a high-frequency component included in the vibration before measuring an error with respect to the vibration,
Wherein the displacement measuring instrument shields the exterior so that the external pressure and the external air are blocked, thereby reducing the error of the atmospheric pressure or the air resistance.
2. The receiver of claim 1, wherein the amplifier
The electric power is amplified by an A-level voltage value indicating an efficiency of 40 to 50% by using the buffer amplifier for performing the A-class amplification,
The electric power may be amplified by a B-class voltage value indicating an efficiency of 50 to 79% by using a push-pull amplifier performing the B-class amplification,
Wherein the electric power is amplified by a C-level voltage value indicating an efficiency of 78 to 95% by using a doubling amplifier for performing the C-class amplification.
The method according to claim 1,
The serial port is connected to a cable line including a plurality of copper wires sealed with an epoxy resin, and outputs big data encrypted or texted with the ASCII statement to the outside,
Wherein the DA converter is connected to another cable line including a plurality of copper wires sealed with the epoxy resin to output the current value having a value of 4 to 20 mA to the outside.
Converting the magnetic force generated by activating the magnet to a coil included in the electric field circuit into an electric force;
The amplifier amplifies the electric force to one of A class amplification, B class amplification and C class amplification to generate a first electrical signal having any one of the A class voltage value, the B class voltage value, and the C class voltage value step;
Passing a first low frequency signal in the first low frequency band and removing only the first high frequency signal in the first high frequency band of the first electrical signal;
Converting the first electric signal formed by the first low-frequency signal into an electrical signal by an AD converter to generate a second electrical signal;
Passing a low frequency second harmonic signal in a second low frequency band by removing a second high frequency signal in the second high frequency band of the second electrical signal;
The central processing unit applies the second electric signal formed of the second low-frequency signal to the tilt sensor to measure the tilt error, and then controls the first correction system to calculate the tilt error for the main body lying on the three- Correcting;
The central processing unit applies the second electrical signal to the displacement measurement system to measure an error with respect to the gravitational acceleration detected through the wired / wireless communication network, and then controls the second correction system to automatically or manually correct the error with respect to the gravitational acceleration 2 < / RTI >
The central processing unit encrypts or characterizes the first and second correction amounts checked in accordance with the first and second corrections into an ASCII statement and outputs the encrypted data to the outside through a serial port; And
And outputting the extracted current value to the outside as the DA converter analog-converts the first and second correction amounts.
delete 8. The apparatus according to claim 7,
Measuring an error with respect to vibration, atmospheric pressure, temperature, or air resistance detected through the wired / wireless communication network by applying the second electrical signal to the displacement measurement system;
Automatically or manually correcting the vibration error, the atmospheric pressure error, or the air resistance error using one of the first and second correction systems; And
Further comprising the step of calculating an error constant according to the temperature error using the connected temperature chamber.
10. The method of claim 9,
Removing the high-frequency component included in the vibration before the low-pass analog filter measures an error with respect to the vibration; And
Further comprising the step of shielding the enclosure such that the displacement meter measures the external pressure and the external air so as to reduce errors in the atmospheric pressure or the air resistance.
8. The apparatus of claim 7, wherein the amplifier
Amplifying the electric force with an A-level voltage value indicating an efficiency of 40 to 50% by using the buffer amplifier performing the A-class amplification;
Amplifying the electric force with a B-level voltage value indicating an efficiency of 50 to 79% using the push-pull amplifier performing the B-class amplification; And
And amplifying the electric power to a C-level voltage value indicating an efficiency of 78 to 95% by using a doubling amplifier for performing the C-class amplification.
8. The method of claim 7,
Connecting the serial port to a cable line including a plurality of copper wires sealed with an epoxy resin, and outputting big data encrypted or texted with the ASCII statement to the outside; And
Wherein the DA converter is connected to another cable line including a plurality of copper wires sealed with the epoxy resin to output the current value having a value of 4 to 20 mA to the outside, A method of driving a device.
KR1020140169599A 2014-12-01 2014-12-01 Standard Measure Device of Self facilities and Drive Method of the Same KR101526936B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050013362A (en) * 2003-07-28 2005-02-04 주식회사 케이티프리텔 Method and apparatus for controlling a pointer on a display of a mobile communication terminal
KR20080084094A (en) * 2007-03-14 2008-09-19 김문식 A warning method and safety device for the tower crane

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050013362A (en) * 2003-07-28 2005-02-04 주식회사 케이티프리텔 Method and apparatus for controlling a pointer on a display of a mobile communication terminal
KR20080084094A (en) * 2007-03-14 2008-09-19 김문식 A warning method and safety device for the tower crane

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