CN110687421A - Hand-held type partial discharge detection device - Google Patents

Abstract

The invention discloses a handheld partial discharge detection device which comprises a shell and a mainboard arranged in the shell, wherein a single chip microcomputer is arranged on the mainboard, a TEV sensor, a display screen, a power supply interface, an ultrasonic sensor interface and an earphone interface which are all connected with the single chip microcomputer are arranged on the shell, the ultrasonic sensor interface is connected with an ultrasonic sensor through a lead, and an indicator light and a power supply button which are connected with the single chip microcomputer are arranged on one side of the display screen; the shell is provided with an induction area, and the TEV sensor is arranged in the induction area; the invention simultaneously uses a transient electric wave detection method and an ultrasonic detection method to detect and position the partial discharge fault point, obtains the signal intensity and the pulse number through analysis and calculation, and simultaneously combines with the ultrasonic amplitude value to analyze and reduce the misjudgment to the maximum extent so as to realize the accurate judgment and positioning of the partial discharge fault, and the use is convenient.

Description

A handheld partial discharge detection device

technical field

The invention belongs to the technical field of discharge detection, and particularly relates to a handheld partial discharge detection device.

Background technique

With the continuous construction of the national UHV AC and DC system, the stability and reliability of the power grid are becoming more and more important. Therefore, the power grid puts forward more and more strict requirements for the safety and reliability of the power equipment itself, and the insulation performance of the power equipment itself should be paid attention to as an important part of the safety and reliability of the power equipment.

Partial discharge test is one of the important means to test the electrical performance of power equipment, and partial discharge is also an important parameter to characterize the insulation performance of power equipment. Partial discharge detection of power equipment through partial discharge test can effectively prevent power equipment from causing power accidents due to its own insulation problems. The judgment of the type of partial discharge can provide maintenance basis for power equipment maintenance. At present, local detection devices are used to set electrical equipment. When testing, first use the transient radio wave detection device to detect the discharge fault, and then use the ultrasonic detection device to accurately locate the partial discharge fault point. The detection steps are cumbersome, and when the ultrasonic detection device is replaced for positioning, it is easy to cause misjudgment, and it needs to be reused. The transient radio wave detection device is quite inconvenient to use.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention proposes a hand-held partial discharge detection device, which solves the problem of misjudgment of partial discharge fault points and inconvenience caused by separate use of the transient radio wave detection device and the ultrasonic detection device.

In order to achieve the above purpose, the technical solution adopted in the present invention is as follows: a hand-held partial discharge detection device, comprising a casing and a main board arranged in the casing, the main board is provided with a single-chip microcomputer, and the TEV sensor, display screen, power interface, ultrasonic sensor interface and earphone interface, the ultrasonic sensor interface is connected with an ultrasonic sensor through a wire, and one side of the display screen is provided with an indicator light and a power button connected to the single-chip microcomputer; the A sensing area is arranged on the housing, and the TEV sensor is arranged in the sensing area.

Further, the motherboard is provided with a first filter circuit, a first amplifier circuit, a first detection circuit, and a first AD conversion circuit that are electrically connected in sequence, the first filter circuit is connected to the TEV sensor, and the first AD conversion circuit is connected to the TEV sensor. Microcontroller connection.

Further, the motherboard is also provided with a second amplifier circuit, a second filter circuit, and a second AD conversion circuit electrically connected in sequence, the second amplifier circuit is connected with the ultrasonic sensor, and the second AD conversion circuit is connected with the single-chip microcomputer.

Further, the display screen adopts a touch screen.

Further, the casing is a rectangular parallelepiped, and the sensing area is arranged on the top of the casing.

Further, the housing is provided with an energy storage power supply, a storage module and a WIfi or Bluetooth communication module connected to the main board.

Compared with the prior art, the present invention has the following beneficial effects: when detecting the partial discharge fault point, the induction area is closely attached to the surface of the electrical equipment cabinet, and the transient radio wave detection and ultrasonic detection functions of the device are turned on at the same time. When using the present invention to detect the amplitude of transient ground waves, an external ultrasonic sensor can be used to detect the gap of the electrical equipment, the display screen of the present invention simultaneously displays the ultrasonic amplitude, and the earphone can be connected to the earphone to listen to the discharged ultrasonic wave. Audio, the present invention uses both the transient ground wave detection method and the ultrasonic detection method to detect and locate the partial discharge fault point, obtain the signal strength and pulse number through analysis and calculation, and at the same time combine the analysis with the ultrasonic amplitude to minimize misjudgment, so as to realize Accurate judgment and location of partial discharge faults, easy to use.

Description of drawings

Fig. 1 is the perspective view of the present invention;

Fig. 2 is the top view of the present invention;

Figure 3 is a schematic structural diagram of an ultrasonic sensor;

Figure 4 is a circuit diagram of the display screen.

In the figure: 1. Housing; 2. TEV sensor; 3. Display screen; 4. Power interface; 5. Ultrasonic sensor interface; 6. Headphone interface; 7. Ultrasonic sensor; 8. Indicator light; 9. Power button; 10 , Induction area; 11. Conductor.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1-FIG. 4, a handheld partial discharge detection device according to the present invention includes a casing 1 and a main board arranged in the casing 1. The main board is provided with a single-chip microcomputer, and the casing 1 is provided with There are a TEV sensor 2, a display screen 3, a power supply interface 4, an ultrasonic sensor interface 5 and an earphone interface 6 all connected to the single-chip microcomputer. The ultrasonic sensor interface 5 is connected with an ultrasonic sensor 7 through a wire 11. One side of the display screen 3 An indicator light 8 and a power button 9 connected to the single-chip microcomputer are provided; an induction area 10 is arranged on the casing 1 , and the TEV sensor 2 is arranged in the induction area 10 .

In this embodiment, the main board is fixed in the housing 1 by screws; the model of the single-chip microcomputer adopts STM32F429IG76; the model of the TEV sensor 2 adopts TWTA-01; the power interface 4 adopts the type-c interface; the ultrasonic sensor interface 5 adopts the Lemo interface; The size of the headphone jack 6 is 3.5mm; the connector of the ultrasonic sensor 7 is a LEMO circular connector.

Further, the motherboard is provided with a first filter circuit, a first amplifier circuit, a first detection circuit, and a first AD conversion circuit that are electrically connected in sequence, the first filter circuit is connected to the TEV sensor 2, and the first AD conversion circuit is connected to The single-chip microcomputer is connected, the signal detected by the TEV sensor 2 is transmitted to the single-chip microcomputer through the above circuits in turn, and the single-chip computer displays the detected TEV amplitude on the display screen 3 through calculation processing.

Further, the motherboard is also provided with a second amplifier circuit, a second filter circuit, and a second AD conversion circuit that are electrically connected in sequence, the second amplifier circuit is connected to the ultrasonic sensor 7, and the second AD conversion circuit is connected to the single-chip microcomputer. The same The signal detected by the ultrasonic sensor 7 is transmitted to the single-chip microcomputer through the above circuits, and the single-chip microcomputer displays the detected ultrasonic amplitude curve on the display screen 3 after calculation processing. The upper left side of the display screen 3 displays the TEV amplitude value, and the upper left side is the TEV pulse count , the lower curve is the ultrasonic amplitude curve, which is convenient for the operator to observe.

The display screen 3 adopts a touch screen, and the specific model is TFT1. The circuit diagram of the display screen 3 is shown in FIG. 4, and the touch screen is more convenient to use.

The housing 1 is provided with an energy storage power supply, a storage module and a WIfi or Bluetooth communication module connected to the main board. The energy storage power supply adopts a 3.7V8000mAh power supply, and the storage module adopts a 16GB type-c U disk. The use of the wireless network in mobile improves the applicability of the present invention.

When using the present invention, the power button 9 is turned on, the indicator light 8 is turned on, the induction area 10 is closely attached to the surface of the electrical equipment cabinet, and the transient electric wave detection and ultrasonic detection functions of the device are simultaneously turned on through the display screen 3. TEV The sensor 2 transmits the collected signal to the single-chip microcomputer, and at the same time, the ultrasonic sensor 7 is used to detect the gap of the electrical equipment. The ultrasonic sensor 7 transmits the collected information to the single-chip computer. After the analysis and calculation of the single-chip computer, the detected TEV amplitude and TEV pulse count , The ultrasonic amplitude curve is displayed on the display screen 3 at the same time, which realizes the accurate judgment and positioning of the partial discharge fault, and is easy to use.

Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or to perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. The utility model provides a hand-held type partial discharge detection device, includes casing (1) and sets up the mainboard in casing (1), is provided with singlechip, its characterized in that on the mainboard: the intelligent earphone is characterized in that a TEV sensor (2), a display screen (3), a power interface (4), an ultrasonic sensor interface (5) and an earphone interface (6) which are all connected with the single chip microcomputer are arranged on the shell (1), the ultrasonic sensor interface (5) is connected with an ultrasonic sensor (7) through a wire (11), and an indicator lamp (8) and a power button (9) which are connected with the single chip microcomputer are arranged on one side of the display screen (3); the TEV sensor is characterized in that a sensing area (10) is arranged on the shell, and the TEV sensor (2) is arranged in the sensing area (10).

2. The hand-held partial discharge detection device of claim 1, wherein: be provided with electric connection's first filter circuit, first amplifier circuit, first detection circuit, first AD converting circuit in proper order on the mainboard, first filter circuit is connected with TEV sensor (2), and first AD converting circuit is connected with the singlechip.

3. The hand-held partial discharge detection device of claim 2, wherein: the mainboard is also provided with a second amplifying circuit, a second filter circuit and a second AD conversion circuit which are electrically connected in sequence, the second amplifying circuit is connected with the ultrasonic sensor (7), and the second AD conversion circuit is connected with the single chip microcomputer.

4. The hand-held partial discharge detection device of claim 1, wherein: the display screen (3) adopts a touch screen.

5. The hand-held partial discharge detection device of claim 1, wherein: the shell (1) is a cuboid, and the induction area (10) is arranged at the top end of the shell (1).

6. The hand-held partial discharge detection device of claim 1, wherein: an energy storage power supply, a storage module and a WIfi or Bluetooth communication module which are connected with the mainboard are arranged in the shell (1).

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