KR102078988B1 - Apparatus for measuring dc electric field - Google Patents

Abstract

The present invention discloses a direct current field measuring device. DC field measuring device of the present invention comprises: a charging unit for selectively inducing charge through a plurality of electrodes; A measuring unit measuring a charge induced in the charging unit; A switching unit which selects the plurality of electrodes of the charging unit and switches them to be connected to the measurement unit according to a selection signal; A signal processing unit which receives the voltage signal measured by the measuring unit and outputs the processed signal; And a control unit for outputting the selection signals for selecting the plurality of electrodes to the switching unit, receiving the measurement data output from the signal processing unit, and calculating and outputting the electric field strengths.

Description

DC field measuring device {APPARATUS FOR MEASURING DC ELECTRIC FIELD}

The present invention relates to a direct current field measurement device, and more particularly to a direct current field measurement device for measuring a direct current electric field having a constant form without changing the polarity of the electric field by inducing charge to electrodes of various sizes.

Recently, as interest in electromagnetic waves and electromagnetic fields has increased in relation to health, related complaints have increased, and demand for field measurement technology and equipment is increasing.

In general, in case of devices using thundercloud, HVDC transmission line, DC distribution line, or DC power, electric field of positive (+) or negative (-) type is generated. Is kept constant.

Most transmission and distribution lines, power equipment, etc. currently in operation are frequency characteristics corresponding to a power frequency of 60 Hz or 50 Hz, and form an electric field whose magnitude and direction change with time.

Since this variable electric field is induced in the metal body, it generates a voltage having the same frequency. Therefore, the magnitude and frequency state of the electric field are measured using the generated voltage.

However, since the electrostatic field does not change, unlike the alternating current, the electric field is not induced, and thus it is impossible to measure an AC field sensor that measures a variable electric field.

Therefore, as a method for measuring a direct current electric field, a metal charging plate and another grounded metal plate are faced to each other, and then the other metal plate is rotated by using a motor to change the area where the charging plate is exposed to the electric field.

In other words, when the charged area is changed, the electric charge induced in the charging plate generates a constant waveform while repeating the generation and dissipation in proportion to the exposed area. Thus, amplifying and measuring the AC signal can measure the DC electric field. have.

When measuring DC field in the above way, the motor is used to change the area of the charging plate.However, if the measuring device is installed outdoors, the life of the motor may be limited due to snow, rain, or various environmental effects. It is greatly reduced and the measurement becomes impossible in case of sudden motor failure, which lowers the reliability of the measurement data and is the main cause of disposal.

In addition, there is a problem that it is difficult to use portable because the area required for the placement of the rotating charging plate and the fixed charging plate is large.

Background art of the present invention is disclosed in Korean Unexamined Patent Publication No. 2001-0077112 (2001.08.17. Publication, name of the invention: portable integrated field strength meter).

The present invention has been made to solve the above problems, and an object of the present invention is to provide a direct current field measuring device for measuring a direct current electric field having a constant shape without changing the polarity of the electric field by inducing charge on electrodes of various sizes. It is.

Another object of the present invention is to provide a direct current field measuring device which can be manufactured in a small size and inexpensively by inducing charge by combining a plurality of electrodes into electrodes of various sizes by a switching combination.

Device for measuring direct current field according to the present invention, the charging unit for selectively inducing charge through a plurality of electrodes; A measuring unit measuring electric charge induced in the charging unit; A switching unit which selects a plurality of electrodes of the charging unit and switches them to be connected to the measurement unit according to the selection signal; A signal processor which receives the voltage signal measured by the measurement unit and outputs the signal by processing the signal; And a control unit outputting a selection signal for selecting a plurality of electrodes to the switching unit, and receiving the measurement data output from the signal processing unit and calculating and outputting the electric field strength.

The invention further comprises a display unit for displaying the operating state of the control unit and the calculated electric field strength.

The invention further comprises a data storage unit for storing the electric field strength and the set value calculated by the control unit.

The present invention is characterized by further comprising a GPS module for measuring the position and providing the position information to the control unit.

In the present invention, the controller is characterized in that for outputting the selection signal so that the sum of the size of the selected electrode of the plurality of electrodes increases or decreases in units of a set period.

In the present invention, the plurality of electrodes is characterized in that each of the same size.

In the present invention, the plurality of electrodes is characterized in that each having a size of an integer multiple of the reference size from the reference size.

In the present invention, the signal processing unit an amplifier for amplifying the voltage signal measured by the measuring unit; A filter unit for removing noise from the voltage signal amplified by the amplifier; A differential unit converting the voltage signal from which the noise is removed from the filter unit into a differential signal and outputting the differential signal; And an AD converter converting the voltage signal from which the noise is removed from the filter unit into a digital signal and outputting the digital signal.

The direct current field measuring apparatus according to the present invention can measure a direct current electric field having a constant shape without inducing the polarity of the electric field by inducing electric charges to electrodes of various sizes, thereby making it possible to manufacture a smaller size at a lower cost.

In addition, according to the present invention, it is possible to utilize a facility that can be charged as an electrode, it is possible to measure the DC electric field with a more various design and lower cost.

In addition, according to the present invention, it is possible to easily measure the electric field of the DC transmission line or related power equipment in a small size, and to install the DC field measuring device in a high risk of lightning, such as golf courses, paddy fields, plains, etc. You can notify.

1 is a block diagram showing a direct current field measuring apparatus according to an embodiment of the present invention.
2 is a configuration diagram showing in detail a DC electric field measuring device according to an embodiment of the present invention.
3 is a block diagram showing a charging unit of the DC electric field measuring device according to an embodiment of the present invention.
4 is a table showing a switching state of the direct current field measurement apparatus according to an embodiment of the present invention.

Hereinafter, a DC field measuring apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary depending on the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a block diagram showing a direct current field measurement device according to an embodiment of the present invention, Figure 2 is a block diagram showing a DC field measurement device according to an embodiment of the present invention in detail, Figure 3 4 is a block diagram showing a charging unit of the DC electric field measuring apparatus according to an embodiment of the present invention, and FIG. 4 is a table illustrating a switching state of the DC electric field measuring apparatus according to the exemplary embodiment of the present invention.

As shown in FIG. 1 and FIG. 2, the DC electric field measuring device according to the embodiment of the present invention includes a charging unit 10, a measuring unit 30, a switching unit 20, a signal processing unit 40, and a controller 50. ), The display unit 80, the data storage unit 70, and the GPS module 60.

The charging unit 10 selectively induces charge through the first to fourth electrodes 11 to 14.

The first to fourth electrodes 11 to 14 are not limited to the form of electrodes as long as they can induce charge through metal or nonmetal materials, and may be configured with various existing devices, structures, and facilities.

In addition, the shape of the electrode may be a variety of shapes, such as rectangular, circular, arc with a thickness, concentric circles, etc., the size may be configured in the same size, respectively, or may be composed of the size of an integer multiple of the reference size from the reference size. Not only that, but also various sizes are possible.

That is, the electrode of the charging unit 10 may be formed regardless of the number, shape and size of the electrode as long as it can induce charge through charging.

In this embodiment, for convenience of description, a state composed of four electrodes will be described as an example.

The measurement unit 30 measures the voltage applied to the sensing resistor R connected to the ground by the charge induced in the charging unit 10.

The switching unit 20 selects the first to fourth electrodes 11 to 14 of the charging unit in accordance with the selection signal, and switches them to be connected to the measurement unit 30.

For example, as shown in FIG. 2, the first electrode 11, which is a reference size, and the second electrode 12, which is twice the size, are three times the size of an integer multiple of the size of the first electrode 11. When the third electrode 13 is formed of a fourth electrode 14 that is four times the size of the first to fourth switches (# 1 to # 4) so that the magnitude of the electric field (or voltage) charged in the direct current electric field is variable. ) Turns on and off sequentially so that the AC signal shape is generated.

The signal processor 40 receives the voltage signal measured by the measuring unit 30, amplifies the signal, and outputs the signal.

The signal processor 40 includes an amplifier 42, a filter 44, a differential 46, and an AD converter 48.

The amplifier 42 amplifies the voltage signal input from the measuring unit 30, and the filter unit 44 is configured as a low pass filter to remove high frequency noise from the amplified voltage signal.

The differential unit 46 inverts the voltage signal from which the noise is removed by the filter unit 44, converts the voltage signal into a differential signal, and outputs the measured voltage signal in an analog form.

The AD converter 48 converts the voltage signal from which the noise is removed by the filter 44 into a digital signal so that the control unit 50 calculates and outputs the digital signal.

The controller 50 outputs a selection signal for selecting the first to fourth electrodes 11 to 14 to the switching unit 20 so that the size of the electrode charged in the charging unit 10 can be varied, and the signal processing unit It receives the measured data output from (40) and calculates and outputs the electric field strength.

The controller 50 generates and outputs a selection signal such that the sum of sizes of the selected electrodes of the first to fourth electrodes 11 to 14 increases or decreases in units of a set period.

That is, as shown in FIG. 2, when the sizes of the first to fourth electrodes 11 to 14 are configured to be integer multiples, the first to fourth switches # 1 to # 4 are sequentially turned on and off. When the charging unit 10 is charged, the total size is sequentially changed.

However, as shown in FIG. 3, when the first to fourth electrodes 11 to 14 have the same size, as shown in FIG. 4, the first to fourth switches # 1 to # according to each step are illustrated. When 4) is accumulated and turned on and off, the total size of the electric field charged in the charging unit 10 is sequentially changed.

That is, when only the first switch # 1 is turned on in the second step S2, and the first switch # 1 and the second switch # 2 are turned on in the fourth step S4, the charging unit 10 is turned on. ) Will double the total size.

By accumulating in this manner, a selection signal is generated and output so that the first to fourth electrodes 11 to 14 are selected so that the magnitude of the entire electric field charged is varied.

On the other hand, the display unit 80 displays the operating state and the calculated electric field strength of the controller 50 by visual means and audio means.

That is, the measured voltage input from the controller 50 may be displayed, the calculated electric field strength may be displayed, or the selected state of the switching unit 20 may be displayed.

In addition, the warning sound for thundercloud may be output according to the electric field strength to warn of danger.

In addition, when the GPS module 60 is provided, the GPS module 60 may be displayed including the location information of the DC electric field.

The data storage unit 70 may store the electric field strength calculated by the controller 50 and a setting value for calculating the electric field strength by the controller 50. In this case, when the location information is input by the GPS module 60, the location information may be stored together with the measured location information.

As described above, according to the DC electric field measuring device according to the present invention, a DC electric field having a constant shape without changing the polarity of the electric field can be measured by inducing electric charges to electrodes of various sizes, thereby making it possible to inexpensively reduce the size. It can be manufactured, and it is possible to use a device that can be charged as an electrode, so that the DC electric field can be measured at a variety of designs and at low cost.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

Therefore, the technical protection scope of the present invention will be defined by the claims below.

10: charging section 11-14: first to fourth electrode
20: switching unit 30: measuring unit
40: signal processor 42: amplifier
44: filter portion 46: differential portion
48: AD conversion unit 50: control unit
60: GPS module 70: data storage
80 display unit

Claims (8)

A charging unit for selectively inducing charge through a plurality of electrodes;
A measuring unit measuring a charge induced in the charging unit;
A switching unit which selects the plurality of electrodes of the charging unit and switches them to be connected to the measurement unit according to a selection signal;
A signal processor which receives the voltage signal measured by the measurement unit and outputs the signal by processing the signal; And
And a control unit for outputting the selection signals for selecting the plurality of electrodes to the switching unit, receiving the measurement data output from the signal processing unit, and calculating and outputting the electric field strengths.
And the control unit outputs the selection signal so that the sum of sizes of the selected electrodes among the plurality of electrodes increases or decreases in units of a set period.
The DC electric field measuring device of claim 1, further comprising a display unit for displaying an operating state of the control unit and the calculated electric field strength.
The DC electric field measuring device of claim 1, further comprising a data storage configured to store the electric field strength and a set value calculated by the controller.
The DC electric field measuring device of claim 1, further comprising a GPS module that measures a position of the DC electric field and provides position information to the controller.
delete The DC field measuring device of claim 1, wherein each of the plurality of electrodes has the same size.
The DC electric field measuring device of claim 1, wherein each of the plurality of electrodes has an integer multiple of the reference size from a reference size.
The apparatus of claim 1, wherein the signal processor comprises: an amplifier for amplifying the voltage signal measured by the measurement unit;
A filter unit for removing noise from the voltage signal amplified by the amplifier;
A differential unit converting the voltage signal from which the noise is removed from the filter unit into a differential signal and outputting the differential signal; And
And an AD converter converting the voltage signal from which the noise is removed from the filter into a digital signal and outputting the digital signal.

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