KR20100086924A - Module for measuring static electricity and apparatus for measuring static electricity - Google Patents

Abstract

The present invention provides a static electricity measuring module. The static electricity measuring module receives the measured static electricity value from the static electricity measuring unit measuring the static electricity value on the surface of the charged object, the distance measuring unit measuring the distance value between the surface of the charged object and the static electricity measuring unit, and measuring the distance. Receiving the measured distance value from the negative electrode, correcting the measured electrostatic value to a predetermined reference conversion ratio according to the measured distance value, and even if the measured distance value is variable, the surface of the charged object surface at a predetermined reference position. And a constant voltage corrector configured to calculate a reference static electricity value when the static electricity value is measured. Therefore, the present invention can be accurately calculated by converting the static electricity value measured according to the change in distance to the surface of the charged object.

Description

Static measurement module and static electricity measuring device {MODULE FOR MEASURING STATIC ELECTRICITY AND APPARATUS FOR MEASURING STATIC ELECTRICITY}

The present invention relates to an electrostatic measuring device, and more particularly, to an electrostatic measuring module and an electrostatic measuring device capable of converting and calculating an electrostatic value measured according to a change in distance to a surface of a charged object.

Typically, in order to measure the static electricity value for the charged object, it was conventionally measured using the following method.

First, [Document 1] JP 2008-057985 A 2008. 3. 13, According to the disclosure of the present invention, the ultrasonic wave is generated at a predetermined distance using an ultrasonic generator to detect the surface potential of the charged object, and the signal is generated. In this section, it is described to provide a distance corrector static electricity meter for allowing a sensor to measure the surface potential of a charged object.

Second, [JP 2] JP 1993-172886 A 1993. 7. 13, According to the purpose and configuration of page 1, in the measuring device for measuring the surface potential of the charging body, light is emitted from the measuring device to the charged object to produce an image of light. It is described to provide a device capable of measuring accurate surface potential using a method of measuring static electricity at the point where light focuses to a single point.

In order to solve the problem that an error of the static electricity value occurs according to the measurement distance when measuring static electricity at the same point in the charging object, the two conventional technologies set the distance in which the measurement error is minimized beforehand. Using ultrasonic waves or light to find the optimum distance to measure the static electricity.

However, in the case of the ultrasonic wave, the ultrasonic wave is transmitted from the ultrasonic wave transmitter to reflect the charged object and is received by the ultrasonic wave receiver to calculate the distance. There is a problem that the measurement is impossible due to the surface shape and the material of the charged object, which is water, or the measurement error is relatively large.

In addition, in the case of the visible light, by using the convex lens formed on the visible light generating unit, the visible light is projected to the charged object to measure an accurate static electricity value when the visible light forms a constant focus, but according to the situation of the surface of the charged object There is a problem that it is impossible to visually determine the image of the projected light.

In addition, since both methods require the user to carry the static electricity measuring instrument and measure the static electricity value depending on the hassle and movement of the person and the visual and auditory senses of the human being in order to adjust the proper measurement distance according to the focus of the ultrasonic signal or visible light. There is a problem that can not.

In addition, in the conventional recording of the static value measured by the user, since there is no separate storage medium in the static electricity meter, only 20 pieces of data can be recorded by hand or stored even in the case of a measuring device having some storage functions. This also has a lot of inconvenience because it can be output only through a dedicated printer.

The present invention was created to solve the above problems, an object of the present invention is to use a static electricity measuring unit having a distance measuring unit using an infrared ray having excellent linearity and a sensor for measuring the static electricity on the surface of the charged object in the electrostatic measuring module. The present invention provides an electrostatic measuring module and an electrostatic measuring device capable of measuring a distance between a measuring unit and a surface of a charging object, and converting and calculating an accurate electrostatic value by reducing an error of an electrostatic value measured according to the change of the distance. .

Another object of the present invention is to selectively install the static electricity measurement module in the portable controller to be used in a portable, and to display the measured static electricity value on the display, and to store the measured static electricity value in the internal storage and In addition, the present invention provides an electrostatic measuring module and an electrostatic measuring device which can be stored in an external memory in real time.

In one aspect, the present invention provides a static electricity measuring module.

The static electricity measuring module is configured to receive the static electricity measuring unit measuring the static electricity value on the surface of the charged object, the distance measuring unit measuring the distance value from the surface of the charged object, and the measured static electricity value from the static electricity measuring unit, and the distance measuring unit The measured distance value is received from the controller, and the static electricity value is corrected to a predetermined reference conversion ratio according to the measured distance value, so that the static electricity on the surface of the charging object at a predetermined reference position even if the measured distance value is varied. And a constant voltage correction unit for calculating a reference static electricity value when the value is measured.

As the measured distance value increases, the absolute value of the measured static electricity value decreases, and the reference conversion ratio is the measurement obtained while setting the reference static electricity value in advance and changing the measurement distance from the charged object. When the multiplied electrostatic value and the measured distance value may be multiplied by a data table obtained from the relationship in which the reference electrostatic value is calculated.

The distance measuring unit is any one of an optical sensor, an ultrasonic sensor, and a proximity distance sensor. The static electricity measuring module further includes a monitoring unit, wherein the monitoring unit

A determining unit electrically connected to the electrostatic measuring unit, and determining whether the converted electrostatic value conforms to the reference conversion ratio, and from the determining unit when the converted electrostatic value does not conform to the reference conversion ratio. It is provided with an alarm generator for receiving an electrical signal to generate an alarm to the outside.

The static electricity measurement module further includes a storage unit for storing the converted static electricity value, and the static electricity measurement module is further electrically connected to a display unit, and the display unit receives and displays the converted static electricity value from the constant voltage corrector. .

In another aspect, the static electricity measuring unit for measuring the static electricity value of the surface of the charged object, the distance measuring unit for measuring the distance value with the surface of the charged object, the static electricity measuring unit receives the measured static electricity value, the distance The measured distance value is transmitted from a measurement unit, and the measured electrostatic value is corrected to a predetermined reference conversion ratio according to the measured distance value, so that the surface of the charging object at a predetermined reference position even if the measured distance value is varied. And a portable controller hinge-connected to be electrically connected to the static electricity measurement module, the static electricity measurement module having a constant voltage corrector configured to calculate a reference static electricity value when the static electricity value is measured.

The portable controller includes a holder fixed to the static electricity measuring module, electrically coupled to the static electricity measuring module, and a handle portion hinged to the holder.

The storage unit further includes a storage unit for storing the converted static electricity value, and the display unit is installed in the cradle, and the display unit receives the converted static electricity value from the constant voltage corrector and displays the externally visible value.

The handle part is provided with an external memory insertion slot part into which the external memory is inserted to receive the converted static electricity value from the constant voltage corrector and to store the converted static electricity value in the external memory.

In still another aspect, the electrostatic measuring module of any one of claims 1 to 5 and a plurality of module groups and the plurality of electrostatic measuring modules and electrically connected using a cable, Includes a fixed controller to control the operation.

The present invention measures the distance to the surface of the charged object by using the distance measuring unit 101 using infrared rays having excellent linearity and the static electricity measuring unit 102 having a sensor for measuring the static electricity on the surface of the charged object. In addition to the measurement, it is possible to reduce the error of the static electricity value measured according to the distance change, thereby converting and calculating the accurate static electricity value.

In addition, the present invention, by selectively installing a static electricity measurement module in the portable controller to be used in a portable, and also to store the measured static electricity value in the internal storage, and also to store the effect in real time in the external memory Have

Hereinafter, with reference to the accompanying drawings, it will be described the static electricity measuring module and the static electricity measuring device of the present invention.

Figure 1 is a perspective view of the front of the electrostatic measuring module of the present invention from the upper right. 2A is an exploded perspective view illustrating a method in which a connection terminal connected to a cable is connected to a connection portion formed on a rear surface of an electrostatic measurement module of the present invention. Figure 2b is a view showing the operation of the present invention b distance measuring unit. 3 is an exploded perspective view showing the static electricity measuring device of the present invention. 4 is a perspective view showing an electrostatic measuring device of the present invention. 5 is another perspective view showing the static electricity measuring device of the present invention. 6 is a perspective view showing a rotation state of the static electricity measuring device of the present invention. 7 is a perspective view showing another example of the static electricity measuring apparatus of the present invention. 8 is a block diagram showing an electrostatic measuring module of the present invention. 9 is a graph showing an example for calculating a reference conversion ratio according to the present invention.

First, the static electricity measuring module of the present invention will be described.

1 and 2B, the electrostatic measuring module 100 of the present invention includes an electrostatic measuring unit 102 for measuring an electrostatic value on a surface of a charged object P, the electrostatic measuring module 100 and the charged object. (P) a distance measuring unit 101 for measuring a distance value between a surface and the static electricity measuring unit 102 receiving the measured static electricity value, and the measured distance value from the distance measuring unit 101. After receiving the transmission, the measured static electricity value is corrected to a predetermined reference conversion ratio according to the measured distance value, and the static electricity value of the surface of the charging object P is measured at a predetermined reference position even if the measured distance value is varied. And a storage unit 106 for storing the electrostatic value calculated and converted.

Here, the static electricity measuring unit 102 and the distance measuring unit 101 may be disposed on one surface of the module case 110. Accordingly, the static electricity measuring unit 102 is disposed on one surface of the module case 110, and the distance measuring unit 101 is located near the module case 110 and the static electricity measuring unit 102.

The distance measuring unit 101 may be any one of an optical sensor, an ultrasonic sensor, and a proximity distance sensor. The distance measuring unit 101 may be a distance measuring unit using infrared rays among the optical sensors.

In this case, the distance measuring unit 101 emits light to the surface of the charging object P and the light reflected from the surface of the charging object P as shown in FIG. 2B. The light receiving unit 101b for receiving the light may be provided.

In addition, mounting grooves 103 are formed at both ends of the other surface side of the module case 110.

In addition, the constant voltage corrector 105 and the storage 106 may be installed inside the module case 110. The static electricity measuring unit 102 and the distance measuring unit 101 may be electrically connected to the constant voltage correcting unit 105 and the storage unit 106.

The constant voltage corrector 105 and the storage unit 106 may be further electrically connected to the outside by a connection terminal 206 and a cable 301 connected to the connection unit 104 illustrated in FIG. 2A.

In particular, the reference conversion ratio mentioned above in the present invention may be set to be inversely proportional to the measured distance value and the measured electrostatic value.

In more detail, as the measured distance value increases, the absolute value of the measured static electricity value decreases, and the reference conversion ratio is determined by setting the reference static electricity value in advance, and from the charging object P. The measured static electricity value obtained by varying the measured distance of the multiplied by the measured distance value can be represented by a data table obtained from the relationship in which the reference static electricity value is calculated.

When the distance measuring unit 101 is an optical sensor, the reference conversion ratio may vary according to the characteristics of the optical sensor.

1 and 2B and 9, a data table for obtaining the reference conversion ratio may be determined as follows. That is, the constant voltage corrector 105 first sets the reference distance value Ls for the surface of the charged object P at the reference position from the distance measurer 101. The static electricity measuring unit 102 measures a reference static electricity value measured on the surface of the charging object P forming the reference distance value Ls and sets the reference static electricity value.

The measured distance value L's obtained while varying the measurement distance from the charging object P is transmitted from the distance measuring unit 101, and the measured distance value L's is varied and measured according to the measured distance value L's. Check the static electricity value. Then, a table is made as shown in FIG. 9 so as to obtain a reference static electricity value by multiplying the measured static electricity value by the measured distance value. The reference conversion ratio is determined from the table as shown in FIG.

In FIG. 9, a value of changing the measured static value into a digital signal value instead of the measured static value is shown on the left side of the Y axis. The algorithm for converting the measured static electricity value into the digital signal value may vary according to the characteristics of the optical sensor, and can be understood by those skilled in the art, and the reference static electricity value can be obtained by multiplying the digital signal value instead of the measured static electricity value.

This will be described in more detail.

Referring to FIGS. 2B and 9, the measured value of the electrostatic measuring unit shown in FIG. It is shown.

(D) is the distance between the distance measuring unit 101 and the charging object P. FIG. In general, in measuring the static electricity value of the surface of the charged object P, the static electricity value of the surface decreases as the distance value increases.

By measuring the electrostatic value at a distance of 10mm to 200mm on the surface of each charged object P charged from 0V to ㅁ 50KV, a result of achieving the reference change ratio as shown in FIG. 9 may be obtained.

In the result graph of FIG. 9, (X) is [the static value of the actual charged object] described on the X axis, and 0V to ㅁ 50KV is applied to the surface of the charged object P, and (D) is the static electricity measuring unit. Reference numeral 102 denotes a distance value between the charged object P, and Y denotes a value obtained by converting a measured value of the static value of the surface of the charged object P by the static electricity measuring unit 102 into a digital signal value. . In the graph of FIG. 9, after applying 0 V to ㅁ 50 KV on the surface of the charged object P, the static electricity value is measured and converted into a digital signal value at a distance of 10 mm, and the static electricity value is measured at a distance of 20 mm. A graph created by converting to a value.

Therefore, when the algorithm operation of the reference conversion ratio is derived using the result graph of FIG. 9, it corresponds to the (Y) value measured when the static electricity value is measured at a distance of 10 mm to 200 mm on the surface of the charging object P. The value of (X) may be the actual static value of the surface of the charging object P.

For example, when the static electricity is measured on the surface of the charged object P at a distance of 10 mm, when the measured value is + and the (Y) value is 250,000, the static value of the actual charged object P surface becomes +50 KV. In the case where the value measured under the same conditions as the above condition is − and the (Y) value is 50,000, the static electricity value of the surface of the actual charged object P may be −10 KV. The constant voltage correction unit 105 may correct the static electricity value measured at any distance using the reference conversion ratio obtained from the data table as shown in FIG. 9 with the accurate static electricity value measured at the actual reference distance value (preset distance value). It is.

Since the graph as shown in FIG. 9 may vary from sensor to sensor, the reference conversion ratio is previously generated in the data table as shown in FIG.

A relational formula for explaining the relation of such an algorithm may be as follows. EV = ADV x D

Here, EV is an actual reference static electricity value, ADV is a digital signal value of the measured static electricity value (that is, a value (Y) in FIG. 9), and D is a measurement distance.

Referring to the graph of FIG. 9, since the measurement distance and the digital signal value are inversely proportional to each other, multiplying the two values yields the static electricity value of the actual charged object P on the X axis. Regardless of the measurement distance, a constant static electricity value of the actual charged object P can be obtained.

Meanwhile, referring to FIG. 8, the static electricity measuring module 100 may further include a monitoring unit 107.

The monitoring unit 107 is electrically connected to the static electricity measuring unit 102, the determination unit 108 for determining whether the converted electrostatic value is based on the reference conversion ratio and the converted electrostatic value is When not in accordance with the reference conversion ratio may be provided with an alarm generator 109 for receiving an electrical signal from the determination unit 108 to generate an alarm to the outside.

Accordingly, when the static electricity value on the surface of the charged object P does not follow the reference conversion ratio, it may mean that the static electricity value is abnormally measured, and the determination unit 108 determines this, and thus the alarm By using the generator 109 to generate an alarm to the outside, the abnormal measurement can be notified.

In addition, the static electricity measuring module 100 may be further electrically connected to the display unit 208. Here, the display unit 208 may be formed on the cradle 207 of the portable controller 200 described below.

The display unit 208 may receive the converted static electricity value from the static electricity measuring unit 102 and visually display it.

Therefore, since the static electricity value measured by the static electricity measuring unit 102 is displayed in real time through the display unit 208, the operator can easily check the static electricity value measured.

In addition, the static electricity value measured as described above may be stored in the storage unit 106 in real time.

Next, the static electricity measuring apparatus of the present invention will be described.

The static electricity measuring device of the present invention is hinged so as to be electrically connected to the static electricity measuring module 100 and the static electricity measuring module 100 described above, and the portable controller 200 for controlling the static electricity measuring module 100. It consists of.

Here, since the static electricity measuring module 100 is substantially the same as described above, the following description will be omitted.

The configuration of the portable controller 200 is as follows.

3 to 6, the portable controller 200 fixes the static electricity measuring module 100, a cradle 207 that is coupled to be electrically connected to the static electricity measuring module 100, and the cradle ( 207 and the handle portion 201 is hinged.

In more detail, as shown in FIG. 4, the portable controller 200 includes a handle 201, an external memory insertion slot 202, an operation switch 203, a power switch 204, and a rotating unit 205. , A connecting terminal 206, a cradle 207, and a display unit 208.

The handle part 201 includes a power supply unit (not shown) capable of driving the static electricity measurement module 100 and the portable controller 200, and converts the static electricity value measured and converted from the constant voltage corrector 105. An external memory insertion slot part 202 is formed to insert the external memory so as to be received and stored in the external memory (not shown).

In the external memory inserted through the storage unit of the static electricity measuring module 100 and the external memory insertion slot 202 of the portable controller 200, the static electricity values measured by the static electricity measuring unit 102 are stored in real time. Can be.

And, both ends of the cradle 207 is formed with a fitting rail (207a) is fitted to be coupled to the mounting groove 103 formed on both ends of the module case. In addition, the holder is formed with a connection terminal 206 electrically connected to the connection portion 104 formed in the module case 110.

Accordingly, the constant voltage corrector 105 and the storage 106 are connected to the display unit 208 installed in the portable controller 200, the external memory insertion slot 202, and the power switch 204 through the connection terminal 206. ), The operation switch 203 and the power supply may be electrically connected.

In addition, the cradle 207 is provided with the display unit 208, the display unit 208 can receive the electrostatic value is converted and calculated from the electrostatic measuring unit 102 can be displayed to the outside visually have.

To describe the operation of the static electricity measuring device, the power switch 204 installed in the side portion to operate the portable controller 200 to make the ON state. Subsequently, power is supplied to the static electricity measurement module 100 through the connection terminal 206 of the portable controller 200, and the display unit 208 also operates to be in a measurement standby state. Subsequently, when the operation switch 203 installed on the handle 201 is pressed, the signal is transmitted to the static electricity measuring module 100 through the connection terminal 206, and the infrared distance measuring unit 101 and the static electricity measuring unit 102 are driven. The static electricity value measured by the static electricity measuring unit 102 is displayed on the display unit 208 and stored in the storage unit 106 and the external memory.

In addition, the display unit 208 of FIG. 5 is configured as a touch screen, and includes a hold key for displaying a current measurement value, a transmission key for transmitting the stored value of the storage unit to an external memory, A measurement distance, an electrostatic measurement value, and an operating time may be displayed, including an auto off key and a zero key for setting the measurement value to zero.

In addition, as shown in FIG. 6, the rotating part 205 formed between the handle part 201 and the module holder 207 may rotate the static electricity measuring module 100 forward and backward by 180 °. Therefore, even a narrow place, a high place, and a deep place which are not easy for a user to measure can be adjusted and measured appropriately according to a measurement environment.

Referring to FIG. 7, another example of the static electricity measuring device of the present invention forms a module group such that the static electricity measuring module 100 configured as described above comprises a plurality, and the static electricity measuring modules 100 include the cable 301. It may be attached to one fixing controller 300 through the operation.

Therefore, it is possible to measure the static electricity value for the charged object at various positions at the same time.

Accordingly, the static electricity measuring module 100 and the static electricity measuring device according to the present invention may be measured according to the movement of the user in order to maintain an appropriate measurement distance and a measurement error of the static electricity value which may occur according to the surface shape and material of the charging object P. In the measurement method error, a reference conversion ratio can be used to measure an accurate static value.

Therefore, the user can measure the accurate electrostatic value in the range 0 ~ 800mm, more preferably 10 to 200mm, the range of the infrared sensor which is the distance measuring unit 101, preferably 10 to 200mm without the user moving directly, The linearity of the infrared makes it easy to measure the static electricity value on the surface of the moving object as in the process using a conveyor.

In addition, the static electricity measuring module 100 of the present invention can be used as a portable using a portable controller 200 or a fixed controller 300 to facilitate the user's convenience to be used for fixing.

In addition, when the portable controller 200 is used, the static electricity measurement module 100 may be coupled to the portable controller 200 to confirm accurate static electricity measurement values through the display unit 208 of the portable controller 200.

In addition, since the storage unit 106 that stores the measured data is built in the static electricity measuring module 100, the measured value may be stored in real time.

In addition, since the portable controller 200 is provided with a slot 202 into which an external memory or the like can be inserted, the stored value stored in the storage 106 of the static electricity measurement module 100 may be transferred to an external computer. .

In addition, when the static electricity measurement module 100 is used by using the fixed controller 300, the maximum quantity of static electricity measurement module 100 allowed by the controller can be connected to the network, and the measurement module is supplied by receiving power through the controller. The value measured at 100 may be transmitted to the controller. The transmitted value may be transmitted in real time from a display unit (not shown) of the fixed controller 300 or a main computer (not shown) to which the fixed controller 300 is connected to a network, thereby confirming accurate static electricity measurement values.

In addition, since there is a rotating part 205 between the handle portion 201 and the module holder 110 of the portable controller 200, even if the user is not easy to measure the static electricity measuring module 100 to fit the measurement environment It can be measured by rotating.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Of course.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

Figure 1 is a perspective view of the front of the electrostatic measuring module of the present invention from the upper right.

2A is an exploded perspective view illustrating a method in which a connection terminal connected to a cable is connected to a connection portion formed on a rear surface of an electrostatic measurement module of the present invention.

Figure 2b is a view showing the operation of the distance measuring unit according to the present invention.

3 is an exploded perspective view showing the static electricity measuring device of the present invention.

4 is a perspective view showing an electrostatic measuring device of the present invention.

5 is another perspective view showing the static electricity measuring device of the present invention.

6 is a perspective view showing a rotation state of the static electricity measuring device of the present invention.

7 is a perspective view showing another example of the static electricity measuring apparatus of the present invention.

8 is a block diagram showing an electrostatic measuring module of the present invention.

9 is a graph showing an example for calculating a reference conversion ratio according to the present invention.

* Description of Signs of Main Parts of Drawings *

100: static electricity measuring module 101: distance measuring unit

101a: light emitting portion 101b: light receiving portion

102: static electricity measuring unit 103: mounting groove

104 connection portion 105: constant voltage correction unit

106: storage unit 107: monitoring unit

108: determination unit 109: alarm generating unit

200: portable controller 201: handle

202: slot for inserting external memory 203: operation switch

204: power switch 205: rotating part

206: connection terminal 207: module holder

207a: fitting rail 208: display unit

300: fixing controller 301: cable

Claims (13)

A static electricity measuring unit measuring a static electricity value on the surface of the charged object; A distance measuring unit measuring a distance value from the surface of the charged object; And The measured electrostatic value is transmitted from the electrostatic measuring unit, the measured distance value is received from the distance measuring unit, and the measured electrostatic value is corrected to a predetermined reference conversion ratio based on the measured distance value. And a constant voltage corrector configured to calculate a reference static value when the static value of the surface of the charged object is measured at a predetermined reference position even if the measured distance value is variable. The method of claim 1, wherein the absolute value of the measured static electricity value decreases as the measured distance value increases. The reference conversion ratio is a relationship in which the reference static electricity value is calculated when the reference static electricity value is set in advance and the measured static electricity value obtained by changing the measurement distance from the charging object and the measured distance value are multiplied. Electrostatic measurement module, characterized in that can be represented by a data table obtained from. 3. The method of claim 2, The distance measuring unit may be any one of an optical sensor, an ultrasonic sensor, and a proximity distance sensor. 3. The method of claim 2, The static electricity measuring module further includes a monitoring unit, The monitoring unit, A determination unit electrically connected to the static electricity measuring unit, and determining whether the converted static electricity value corresponds to the reference conversion ratio; And an alarm generator configured to receive an electrical signal from the determination unit and generate an alarm to the outside when the converted static electricity value does not correspond to the reference conversion ratio. 3. The method of claim 2, Further comprising a storage for storing the converted electrostatic value, The static electricity measuring module is further electrically connected to the display unit, And the display unit receives and displays the converted static electricity value from the constant voltage corrector. A static electricity measuring unit measuring a static electricity value on a surface of a charged object, a distance measuring unit measuring a distance value from the surface of a charged object, and receiving the measured static electricity value from the static electricity measuring unit, When the measured distance value is transmitted, the measured static value is corrected to a predetermined reference conversion ratio according to the measured distance value, so that the static value of the surface of the charging object at a predetermined reference position even if the measured distance value is varied. A static electricity measurement module having a constant voltage corrector configured to calculate a reference static electricity value when the measurement is performed; And And a portable controller hinged to be electrically connected to the static electricity measuring module and controlling the static electricity measuring module. The method of claim 6, wherein as the measured distance increases, the absolute value of the measured static electricity value decreases. The reference conversion ratio is a relationship in which the reference static electricity value is calculated when the reference static electricity value is set in advance and the measured static electricity value obtained by changing the measurement distance from the charging object and the measured distance value are multiplied. Electrostatic measuring device, characterized in that can be represented by a data table obtained from. The method of claim 7, wherein The distance measuring unit may be any one of an optical sensor, an ultrasonic sensor, and a proximity distance sensor. The method of claim 7, wherein The static electricity measuring module further includes a monitoring unit, The monitoring unit, A determination unit electrically connected to the static electricity measuring unit, and determining whether the converted static electricity value corresponds to the reference conversion ratio; And an alarm generator for receiving an electrical signal from the determination unit and generating an alarm to the outside when the converted static electricity value does not correspond to the reference conversion ratio. The method of claim 7, wherein The portable controller, Fixing the static electricity measuring module, the electrostatic measuring device characterized in that it comprises a cradle coupled to be electrically connected to the electrostatic measuring module, and the handle portion hinged to the holder. The method of claim 10, Further comprising a storage for storing the converted electrostatic value, The cradle is installed on the display unit, And the display unit receives the converted static electricity value from the constant voltage corrector and visually displays the static electricity value. The method of claim 12, And an external memory insertion slot part in which the external memory is inserted to receive the converted static electricity value from the constant voltage corrector and to store the converted static memory in the external memory. A module group including a plurality of static electricity measuring modules according to any one of claims 1 to 5; And And a fixed controller electrically connected to each other using the plurality of static electricity measurement modules and cables, and configured to control the operation of the plurality of static electricity measurement modules.

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