KR20140055256A - Portable ultrasonic partial discharge measurement device and method which can guide fault position - Google Patents

Abstract

The present invention relates to a portable ultrasonic partial discharge measurement device with a function of directing a fault position and a measurement method thereof, which are capable of enhancing credibility of data, and efficiency and convenience in measurement by adding a function of directing a fault position against a fault position where a partial discharge takes place, by using image data according to a real-time image processing conducted while a partial discharge measurement is implemented on a power apparatus. In other words, the present invention combines real-time changes in image data which filmed a target subject to partial discharge measurement and information on real-time sizes of ultrasonic signals indicating the size of the discharged signals measured to display, on the display device, an arrow indicating a direction where signals of a greater partial discharge has been generated, which enables the user to only adjust and move the device of the present invention including an ultrasonic sensor, a illumination reflector, and a camera toward the direction indicated by the arrow (the position where a signal of the greatest partial discharge is generated) as directed. Hence, efficiency and convenience of measuring partial discharge is greatly enhanced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable ultrasound partial discharge measuring apparatus and a portable ultrasound partial discharge measuring apparatus,

The present invention relates to a portable ultrasound partial discharge measuring apparatus having a defect position inducing function, and more particularly, to a portable ultrasound partial discharge measuring apparatus using a video data according to real-time image processing at the time of partial discharge measurement of a power device, And more particularly, to a portable ultrasound partial discharge measuring apparatus and method having a defect position inducing function which is capable of improving the efficiency, convenience, and data reliability at the time of measurement.

Generally, the term partial discharge is a generic term for a discharge occurring in any part of an electric power equipment such as a power receiving facility installed in various industries and a power system substation and a high voltage switchboard. The partial discharge refers to a corona discharge near the tip of the electrode, A void discharge occurring in voids in the insulating material, and the like.

In this way, when a partial discharge occurs in various power devices including an electric power reception equipment and a high-voltage switchboard, since the size of the partial discharge power source is substantially small, it is difficult to accurately detect the position where the partial discharge occurs, have.

Therefore, the technique of estimating the partial discharge position of the power device is a very important technique for preventing the failure of the power device.

The conventional technique for estimating the partial discharge position of the electric power equipment includes a method of using the attenuation of the electromagnetic wave discharge signal generated by the discharge and a method of using the time difference in which the electromagnetic wave discharge signal reaches the partial discharge sensor.

However, in the conventional partial discharge measuring method, only the type of defect of the power device can be estimated by grasping the magnitude of the partial discharge amount and the phase of the applied voltage, and it is possible to precisely know the location and risk of the more important partial discharge There is no disadvantage.

In order to solve this problem, Korean Patent Registration No. 10-482305 discloses a method of continuously measuring ultrasound signals during operation of a transformer, (Hereinafter referred to as " ultrasound continuous monitoring device for partial discharge measurement in a transformer ") which is capable of effectively monitoring the progress of a partial discharge by transmitting the result to a preventive diagnosis system, and disclosed in Korean Utility Model Registration No. 20-225223, Discloses a transformer partial discharge diagnosis apparatus using an ultrasonic sensor, which is capable of diagnosing a partial discharge of a transformer by installing an ultrasonic sensor in a transformer.

However, in the conventional method using ultrasonic waves as described above, when the distance between the power device and the ultrasonic sensor to be measured deviates, the magnitude of the partial discharge to be measured continuously changes. Therefore, inconvenience that the ultrasonic sensor must be always installed at the same position If the distance between the power device and the ultrasonic sensor to be measured is small, the size of the ultrasonic wave sensed by the ultrasonic sensor changes, and the position and size of the partial discharge can not be accurately known.

Particularly, when the ultrasonic sensor is fixedly installed around the power device to be measured, the distance between the power device and the ultrasonic sensor is kept the same at all times to obtain the same measured value. However, There is still a disadvantage that only the estimation is possible but the precise position is unknown.

In order to solve the above problems, the applicant of the present application has been able to easily measure the partial discharge while moving for each power device, and to compare the stored image with the current image for each measurement of various power devices, A portable ultrasound partial discharge measuring apparatus having a video photographing means and a partial discharge measuring method using the same ", which has been already filed and registered (No. 10-1070329), so that the position can always be grasped accurately at the same position.

In the case of the technology registered by the applicant of the present application, the point where the discharge at the far distance is strongest is manually aimed and measured, and the previous image data and the current image data are overlapped with each other even when re- . However, this method has the following disadvantages.

That is, in the case of a partial discharge measuring apparatus using a reflector used for measurement of distant discharge, the directivity of HPBW (Half-power beam width) is less than 5 ° and the direction is very strong. Since the signal intensity is greatly different, it is very difficult to quantitatively compare with the re-measurement at the same position after the elapse of the measurement period.

In addition, although some foreign portable ultrasound partial discharge measuring devices are equipped with a laser pointer to assist in the adjustment of the measurement position, they are merely used to display the current measurement position on the object, and moreover, There is a disadvantage in that it is not practicable to identify the pointer in the outdoors.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a plasma display apparatus and a plasma display apparatus which combines real- By displaying the arrows, it is possible to increase the efficiency and convenience in measurement of the portable ultrasound partial discharge measuring apparatus by inducing the aiming of the measurer to the position where the maximum signal is generated. Accordingly, The present invention also provides a portable ultrasound partial discharge measuring apparatus and method which have a defect position inducing function capable of improving the reliability of a portable ultrasound partial discharge measuring apparatus.

According to an aspect of the present invention, there is provided an integrated signal processing apparatus comprising: a body portion, A driving battery mounted on a lower portion of the body portion; An ultrasonic wave reflecting shade integrally mounted on the front end of the body part, An ultrasonic sensor mounted at a central position of an opening of the ultrasonic wave reflector so as to sense an ultrasonic sound according to a partial discharge from a partial discharge measuring object; A camera mounted on a center position of an upper end of the ultrasound reflection shadows to capture a partial discharge measurement object; A display device for displaying an image photographed by the camera while the waveform of the ultrasonic wave measured by the ultrasonic sensor is displayed; A portable ultrasound partial discharge measuring apparatus having a defective position guiding function including a computer connected through a general signal processing device and a communication device, the integrated signal processing device comprising: an ultrasound sensor connected to the ultrasound sensor to amplify a signal from the ultrasound sensor; An ultrasonic amplifier and an audible signal converter for converting the amplified signal from the ultrasonic amplifier into a human audible frequency; an amplifier for converting the amplified analog signal into a digital signal; And a signal processing device for converting an audio frequency into a waveform representing the size of an ultrasonic wave and converting an image photographed by the camera into a video data signal, Comparing the real-time measurement image data with the previous image data, After determining the direction and degree of change of the re-image, the direction of change of the image is changed to the direction of the defect position in which the maximum signal (signal of the partial discharge intensity is generated) is generated by using the maximum discharge signal inducing arrow displayed on the display device And performing a guiding partial-discharge measuring direction guiding control, and at the same time, controlling the real-time ultrasonic FFT size to be compared with the immediately preceding intensity and guiding it in the direction of the maximum signal. The portable ultrasound partial discharge measurement Device.

According to an embodiment of the present invention, the body portion is formed with a handle hole penetrating right and left so as to be gripped by one hand.

In an embodiment of the present invention, the ultrasonic wave reflecting reflector is manufactured by changing the length L and the opening diameter D of the ultrasonic wave reflector in consideration of the use environment, and the mounting position of the ultrasonic wave sensor p is also variable.

According to another aspect of the present invention, there is provided a method of measuring a partial discharge, comprising the steps of: directing an ultrasound sensor, a reflector, and a camera integrally formed with a body part to a partial discharge measurement object; Sensing an ultrasonic sound when a partial discharge is generated in the ultrasonic sensor; Amplifying the measured ultrasonic signal in an ultrasonic amplifier; Converting the amplified signal to an audible frequency audible to a measurer through an audible signal transducer; Converting the amplified analog signal into a digital signal through an A / D conversion and an FFT device, and converting the amplified analog signal into a sensor measurement frequency magnitude through a real time FFT algorithm; Real-time image data of a measurement object photographed by a camera is transmitted to a signal processing apparatus; The method comprising the steps of: comparing a real-time measurement image data photographed by the camera with previous image data to determine a direction and degree of a current image; The arrow indicating the maximum discharge signal is displayed on the display device to guide the change direction of the image to the defect position direction in which the maximum signal (the signal of the partial discharge intensity is generated) is generated, and the real time ultrasonic FFT size is compared with the previous intensity A partial discharge measurement direction guiding control step of guiding the partial discharge measurement direction to the maximum signal direction; The present invention provides a portable ultrasound partial discharge measuring method having a defect position inducing function.

In another embodiment of the present invention, if the current ultrasound signal (real-time ultrasound FFT size) measured in real time is compared with the immediately preceding ultrasound signal intensity, if the current ultrasound signal is larger than the immediately preceding ultrasound signal, The direction indicated by the arrow indicates the same direction as the direction of change of the image displayed on the display device.

In another embodiment of the present invention, if the current ultrasound signal is smaller than the immediately preceding ultrasound signal as a result of comparing the current ultrasound signal (real-time ultrasound FFT size) measured in real time with the immediately preceding ultrasound signal intensity, The direction indicated by the arrow indicates the direction opposite to the direction of change of the image displayed on the display device.

More preferably, if the direction and degree of change of the image are not recognized, or if there is no change or the change is small, an arrow is not displayed on the display device even when the size of the ultrasonic signal is changed, And when the size change is large, the arrow size is increased or, when the size is small, the arrow size is displayed.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

According to the present invention, by combining the real-time change of the image data photographed with the partial discharge measurement object and the real-time size information of the ultrasonic signal representing the measured discharge signal amplitude, By displaying the arrows on the display device, the measurer can move the apparatus of the present invention including the ultrasonic sensor, the reflector, and the camera in the direction indicated by the arrow (position where the partial discharge maximum signal occurs) Therefore, the efficiency and convenience of the partial discharge measurement can be greatly increased.

Also, reliability of pre-stored measurement data can be further improved even after re-measurement after a predetermined time elapses.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a portable ultrasound partial discharge measuring apparatus having a defect position inducing function according to the present invention;
FIG. 2 is a schematic view for explaining a method of manufacturing a reflector having an ultrasonic sensor of a portable ultrasound partial discharge measuring apparatus having a defect position inducing function according to the present invention;
3 is a schematic view showing an example of production of a reflector having an ultrasonic sensor that can be manufactured according to the design method of FIG. 2;
FIG. 4 is a control block diagram of a portable ultrasound partial discharge measuring apparatus having a defect position inducing function according to the present invention.
FIG. 5 is a flowchart illustrating a portable ultrasound partial discharge measuring method having a defect position inducing function according to the present invention,
6 is a schematic view for explaining a defective position induction control example of a portable ultrasound partial discharge measuring apparatus having a defective position guiding function according to the present invention.
7 is an explanatory diagram illustrating an example of use of a conventional partial discharge measuring apparatus.

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

As shown in FIG. 1, the external appearance of the ultrasonic partial discharge measuring apparatus according to the present invention includes a body portion 10 having a handle hole 12 that a user can hold by hand in consideration of portability and mobility, The integrated signal processing device 20 is embedded in the unit 10 and the driving battery 19 is embedded in the lower portion of the body 10.

The handle hole 12 is a hole penetrating the body portion 10 in the left and right direction so that the user can grasp the body portion 10 with one hand so that the user can easily carry the apparatus of the present invention by hand, Precision measurement of the measurement object can be performed conveniently.

The ultrasonic wave reflecting reflector 14 is integrally assembled to the front end of the body portion 10 so that the parabolic reflector 14 is pivotally rotated about the inner curved surface so as to reflect the ultrasonic wave to the ultrasonic wave sensor 16, At the open front central position, an ultrasonic sensor 14 is mounted to detect an ultrasonic sound detected when a partial discharge occurs in the partial discharge measurement object 30 (transmission line, electric power equipment, etc.).

Particularly, the ultrasonic reflector 14 has a length L, an opening diameter D, and the like of the ultrasonic reflector 14 in consideration of the use environment (distance to the partial discharge measurement object, And the mounting position p of the ultrasonic sensor 16 is determined differently in order to easily concentrate the ultrasonic signal into the ultrasonic sensor 16 every time the ultrasonic wave reflector 14 is manufactured differently.

More specifically, as shown in FIG. 2, the ultrasonic wave reflector 14 is manufactured by forming the parabolic curve of the inner curved surface by the parabolic equation (4py = x ² ) The mounting position p of the ultrasonic sensor 16 is set to x and y coordinates according to the ratio of L to D when the length is L (mm) and the opening diameter of the ultrasonic wave reflecting shade 14 is D (mm) (0, y).

The reason why the mounting position of the ultrasonic sensor 16 is determined according to the ratio of L: D is that when the ultrasonic wave from the measurement object 30 (transmission line, electric power device, etc.) is vertically incident on the ultrasonic wave reflection shader 14, 14 to the ultrasonic sensor 16 with ease.

For example, referring to FIG. 2, when the parabolic curve of the inner curved surface is rotated by the parabolic equation (4py = x ² ) of the ultrasonic reflecting shade 14, the opening diameter D of the ultrasonic reflecting shade 14, (X = 120 mm), the length (L) axis of the reflector becomes L = 3600 / p mm based on y = x ² / 4p.

At this time, the position p at which the ultrasonic sensor 14 is mounted in the length section of the ultrasonic reflector 14 is determined according to the ratio of L: D. Therefore, as shown in Table 1 below, When the length (L) of the ultrasonic reflector is set to 60 mm when the diameter (D) is 240 mm, the mounting position (p) of the ultrasonic sensor 16 is 60 mm (x, y) (See FIG. 3 (b)) and the length L of the ultrasonic wave reflector 14 is set to 50 mm, the mounting position p of the ultrasonic sensor 16 is determined to be 50 mm, Is determined to be 72 mm since it is (0,72) in the x and y coordinates (refer to FIG. 3 (a)) and when the opening diameter D of the ultrasonic reflector 14 is 120 mm, The mounting position p of the ultrasonic sensor 14 is determined to be 4.5 mm since it is (0, 4.5) in the x, y coordinates (refer to FIG. 3 (c)).

When the mounting position of the ultrasonic sensor 16 with respect to the ultrasonic reflector 14 is determined, the ultrasonic sensor 16 is mounted and fixed using the wire-bar type bracket at the determined position.

In the portable ultrasonic partial discharge measuring apparatus according to the present invention, a camera 18 is mounted as a radiographic element capable of taking a partial discharge measurement object 30 at the central position of the upper end of the ultrasonic reflecting shad 14, The camera 18 is mounted so as to coincide with the direction of measurement of the ultrasonic waves so that the camera 18 can stop and take a moving picture, / Off switch and shutter can be mounted.

In addition, the size (waveform) of the ultrasonic wave measured by the ultrasonic sensor 16 can be seen on the upper surface of the body part 10 or the rear surface of the upper surface of the ultrasonic wave reflecting shade 14, And a display device 27 capable of viewing the photographed image is mounted.

Hereinafter, referring to FIG. 4, which is a block diagram of a general signal processing apparatus built in the body 10 as a kind of host controller, the following will be described.

The integrated signal processing apparatus 20 includes an ultrasonic amplifier 21 connected to the ultrasonic sensor 16 to amplify a signal from the ultrasonic sensor 16, An audible signal conversion device 22 for converting the audible frequency into a waveform representing the size of the ultrasonic wave and a signal processing device 24 for converting the image photographed by the camera 18 into a video data signal do.

At this time, the signal processing device 24 receives a waveform signal indicating the size of the ultrasonic wave and stores the waveform signal in the data storage device, and controls the display device 27 to display waveforms and numerical values, And displays the resultant image data on the display device 27. Alternatively, the display device 27 may display the previous image data stored in the data storage device and compare the current image data with the current image data, Control.

Particularly, the signal processing device 24 according to the present invention displays the real-time measured image data on the display device 27 according to the "real-time maximum signal induction algorithm", and displays the real- The direction of change of the image is guided to the direction of the defect position where the maximum signal (the signal of the partial discharge intensity is generated) is generated, and the real-time ultrasonic FFT size is set to the immediately preceding intensity And a control for guiding the signal to the maximum signal direction is performed. A concrete control method thereof will be described below.

Preferably, the analog signal amplified through the ultrasonic amplifier 21 is converted into a digital signal, and the converted digital signal is converted into a signal at a sensor measurement frequency (usually 40 kHz) through a real time FFT algorithm. A conversion and FFT unit 23 is connected between the ultrasonic amplifier 21 and the signal processing unit 24.

An output terminal of the signal processing device 24 of the integrated signal processing device 20 is connected to a communication device 25 for transmitting the ultrasonic measurement signal and the image data signal stored in the data storage device to the computer 28, , Wi-Fi, Bluetooth, etc.).

7, the general portable ultrasonic measuring apparatus removes the ultrasonic wave reflector. The ultrasonic wave measuring apparatus is separated from the ultrasonic wave measuring apparatus and is measured with two hands (left image in FIG. 7) The aim of the present invention is to provide a portable ultrasound partial discharge measuring apparatus having an ultrasound reflector and a measuring device, (Body with integrated signal processing device) and battery are designed as one body, it is possible to measure one hand, and the center of gravity can be below, which can provide the advantage of less fatigue of the measurer and precise aiming.

Hereinafter, a portable ultrasound partial discharge measuring method having a defect position inducing function according to the present invention will be described with reference to FIGS. 5 and 6. FIG.

After moving to the power equipment to be measured, such as the power reception equipment used in industrial and power system substations and the high voltage switchboard, it is measured whether a partial discharge occurs at a certain distance from the power equipment to be measured.

First, the ultrasonic sensor 16 is directed to the partial discharge measurement object 30 (transmission line, electric power device, etc.) while the user holds the hand in the handle hole 12 of the body part 10, The ultrasonic sensor 16 senses the ultrasonic sound when a partial discharge such as a corona is generated in the object 30.

Subsequently, the ultrasonic signal measured by the ultrasonic sensor 16 is amplified through the ultrasonic amplifier 21 of the integrated signal processing device 20, and this signal is amplified by an audible signal converter 22 kHz, so that the measurer can listen to the audible frequency in real time through the headphone 26 being worn.

That is, when the ultrasonic sensor 16 senses an ultrasonic sound emitted from the corona occurrence point of the partial discharge measurement object 30 (transmission line, high-voltage power device, etc.), the sensed signal is amplified by the ultrasonic amplifier 21, The measured signal is converted into a human audible range in the audible signal converter 22 so that the measurer can help to precisely aim the partial discharge position based on the audible frequency heard through the headphone 26 Of course, the skilled measurer can roughly predict the type of discharge in the field without the help of a computer through the pattern of the sound.

Next, the analog signal amplified through the ultrasonic amplifier 21 is converted into a digital signal through the A / D conversion and FFT unit 23 and is converted into a digital signal through a real-time FFT algorithm at a sensor measurement frequency (usually 40 kHz) Size.

The reason for performing the real-time FFT conversion without converting the analog-to-digital signal into the signal size on the time axis is that it can effectively measure a minute-sized ultrasonic signal embedded in the background noise during the time axis measurement, Therefore, it is possible to improve the minimum sensitivity of the ultrasonic sensor, and various diagnoses can be performed based on the result of the FFT conversion.

Therefore, a signal converted into a digital signal through the A / D conversion and FFT unit 23 and converted into a signal at a sensor measurement frequency (usually 40 kHz) through a real-time FFT algorithm enters the signal processing unit 24 And the real-time image data of the measurement object 30 photographed by the camera 18 is also transmitted to the signal processing device 24. [

Then, the signal processing device 24 compares the real-time measurement image data with the previous image data to grasp the change direction and the degree of the current image, and then determines the change direction of the image as the maximum signal (the signal of the partial discharge intensity) And also performs control to guide the real time ultrasonic FFT size to the maximum signal direction by comparing with the immediately preceding intensity.

That is, the signal processing apparatus 24 processes the ultrasonic wave and the image signal, and performs defect position induction control for displaying the image 29, the ultrasonic signal magnitude and the maximum discharge signal guidance arrow 29 on the display device 27 in real time .

To do this, first, the current direction of the image data and the degree of change of the current image data are compared by comparing the current image data measured in real time with the image data of the immediately preceding image. Simultaneously, the current ultrasonic signal (real-time ultrasonic FFT size) Compare with signal strength.

At this time, the direction and degree of change of the current image data are set so that the ultrasonic sensor 16 is directed to the partial discharge measuring object 30 while the user holds the body 10 with one hand, The measurement object 30 according to the immediately preceding image data is changed to a position corresponding to the current image data and is displayed on the display device 27. [

If the current ultrasonic signal is larger than the previous ultrasonic signal as a result of the comparison, the display of the image is displayed on the display 27. If the current ultrasonic signal is larger than the immediately preceding ultrasonic signal, If the current ultrasonic signal is smaller than the immediately preceding ultrasonic signal, an arrow 29 indicating the direction opposite to the direction of the change of the image displayed on the display device 27 is displayed on the screen of the display device 27, Is displayed on the screen of the display device (27).

The ultrasonic sensor 16 and the reflector 14 integrated with the body 10 while the measurer moves the body 10 toward the direction indicated by the arrow 29 displayed on the screen of the display 27, And the camera 18 are also controlled to move so that the user can be guided to direct the ultrasonic sensor 16 and the reflector 14 toward the accurate position where the ultrasonic signal is always larger, that is, the partial discharge is generated.

For example, when the partial discharge measurement object 30 displayed on the display device 27 is moved away from the ultrasonic sensor 16, the reflector 14, and the camera 18 as shown in FIG. 4, If the current ultrasonic signal is smaller than the immediately preceding ultrasonic signal, the direction indicated by the arrow 29 displayed on the display device 27 is displayed in the direction opposite to the direction of change of the current image data, The ultrasonic sensor 16, the reflector 14, and the camera 18 are guided to move to the immediately preceding ultrasonic signal.

On the contrary, when the partial discharge measurement object 30 displayed on the display device 27 as shown in FIG. 4 attached becomes closer to the ultrasonic sensor 16, the reflection glow 14, and the camera 18, The direction of the arrow 29 displayed on the display device 27 is indicated in the same direction as the direction of change of the current image data so that the measurer can obtain the current signal having the larger signal The user is guided to adjust the movement of the ultrasonic sensor 16 and the reflector 14 and the camera 18 toward the ultrasonic signal.

At this time, if the moving direction of the image can not be grasped, if there is no change, or if the change is small, an arrow mark is not displayed even if the ultrasonic signal size is changed. If the ultrasonic signal size change is larger than the image moving distance, If it is small, it can be abbreviated.

On the other hand, various measurement results controlled and processed by the signal processing device 24 can be transmitted to the computer 28 via the communication device 25 as needed, and can be used for additional precise diagnosis.

As described above, according to the present invention, by combining the real-time change of the image data photographed with the partial discharge measuring object and the real-time size information of the ultrasonic signal indicating the measured partial discharge signal size, The measuring person moves the ultrasonic sensor, the reflector, and the camera integrated with the body portion including the body portion, and the camera toward the direction indicated by the arrow (position where the partial discharge maximum signal occurs) It is possible to greatly increase the efficiency and convenience in the partial discharge measurement.

10:
12: Handle hole
14: Ultrasonic reflector
16: Ultrasonic sensor
18: Camera
19: Battery
20: Integrated signal processing device
21: Ultrasonic amplifier
22: Audio signal conversion device
23: AD conversion and FFT
24: signal processing device
25: Communication device
26: Headphones
27: Display device
28: Computer
29: Arrow
30: Partial discharge measurement object

Claims (7)

A body portion 10 which can be gripped by a user and has a built-in integrated signal processing device 20; A driving battery 19 mounted on a lower portion of the body 10; An ultrasonic wave reflector 14 integrally mounted on the front end of the body 10 in such a manner that the parabola is axially rotated; An ultrasonic sensor 14 mounted at a central position of the opening of the ultrasonic wave reflector 14 so as to sense an ultrasonic sound according to the partial discharge from the partial discharge measuring object 30; A camera 18 mounted at a center position of the upper end of the ultrasonic wave reflector 14 to photograph the partial discharge measurement object 30; A display device (27) for displaying an image photographed by the camera (18) while the waveform of the ultrasonic wave measured by the ultrasonic sensor (16) is displayed; A portable ultrasound partial discharge measuring apparatus having a defect position inducing function, the computer including a computer (28) connected to the integrated signal processing apparatus (20) via a communication device (25)
The integrated signal processing apparatus 20 includes an ultrasonic amplifier 21 connected to the ultrasonic sensor 16 to amplify a signal from the ultrasonic sensor 16, An AD conversion and FFT unit 23 for converting the amplified analog signal into a digital signal and converting the converted digital signal to a sensor measurement frequency magnitude through a real time FFT algorithm And a signal processing device 24 for converting the audio frequency into a waveform representing the size of the ultrasonic wave and converting the image photographed by the camera 18 into a video data signal,
The signal processing device 24 compares the real-time measurement image data with the previous image data to grasp the change direction and the degree of the current image, and then uses the maximum discharge signal guidance arrow 29 displayed on the display device 27 A partial discharge measurement direction induction control for guiding the change direction of the image to the defect position direction in which the maximum signal (signal of the partial discharge intensity is generated) is generated and at the same time, the real time ultrasonic FFT size is compared with the immediately preceding intensity, And a control unit configured to control the deflecting unit to guide the deflecting unit to the deflecting unit.
The method according to claim 1,
The portable ultrasound partial discharge measuring apparatus according to claim 1, wherein the body part (10) is formed with a handle hole (12) penetrating right and left so as to be gripped by one hand.
The method according to claim 1,
The ultrasonic wave reflecting reflector 14 is manufactured in such a manner that the length L and the opening diameter D of the ultrasonic reflecting reflector 14 are different from each other in consideration of the use environment. (p) of the ultrasonic wave is also variable.

Directing the ultrasonic sensor 16 and the reflector 14 integrated with the body 10 including the body 10 and the camera 18 to the partial discharge measurement object 30; Sensing an ultrasonic sound when a partial discharge is generated in the ultrasonic sensor 16; Amplifying the measured ultrasonic signal in the ultrasonic amplifier (21); Converting the amplified signal to an audible frequency that can be heard by a measurer through an audible signal converter (22); Converting the amplified analog signal into a digital signal through an A / D conversion and an FFT unit 23 and converting it into a sensor measurement frequency magnitude through a real-time FFT algorithm; Real-time image data of the measurement object (30) photographed by the camera (18) is transmitted to the signal processing device (24); The method comprising the steps of:
Comparing the real-time measurement image data photographed by the camera with the previous image data to grasp the change direction and the degree of the current image;
(29) for guiding the maximum discharge signal is displayed on the display device (27) to guide the change direction of the image to the defective position direction in which the maximum signal (the signal of the partial discharge intensity is transmitted) is generated, A partial discharge measurement direction guiding control step of guiding the magnitude to the maximum signal direction in comparison with the immediately preceding intensity;
And a defective position detecting unit for detecting a defective position of the ultrasound partial discharge.
The method of claim 4,
As a result of comparing the real-time measured ultrasonic signal (real-time ultrasonic FFT size) with the ultrasonic signal intensity immediately before,
If the current ultrasonic signal is larger than the immediately preceding ultrasonic signal, the direction indicated by the arrow 29 displayed on the display 27 is indicated by the same direction as the direction of change of the image displayed on the display 27 Wherein the method further comprises the steps of:
The method of claim 4,
As a result of comparing the real-time measured ultrasonic signal (real-time ultrasonic FFT size) with the ultrasonic signal intensity immediately before,
If the current ultrasonic signal is smaller than the immediately preceding ultrasonic signal, the direction indicated by the arrow 29 displayed on the display device 27 is indicated as the direction opposite to the direction of the image displayed on the display device 27 Wherein the method further comprises the steps of:
The method of claim 4,
If the change direction and the degree of the image are not recognized, or if there is no change or the change is small, the arrow 29 is not displayed on the display device 27 even if the ultrasonic signal size is changed,
Wherein when the size of the ultrasound signal is larger than the distance of the image movement, the size of the arrow is increased or decreased when the size of the ultrasound signal is larger than the distance of the image movement.

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