CN107505552B - Partial discharge high frequency signal extraction device and measurement system under steep front shock - Google Patents

Abstract

The present application provides a device for extracting high-frequency signals of partial discharge under the impact of steep front, wherein one end of the cavity is provided with a bottom surface of the cavity, and a communication hole is provided on the bottom surface of the cavity; the bottom surface of the cavity is provided on the side outside the cavity There is a high-frequency signal receiving part; the side of the high-frequency signal receiving part located on the bottom surface of the cavity is provided with a connecting rod, one end of the connecting rod located in the cavity is provided with a connecting column, and the periphery of the connecting rod is provided with an insulating sleeve; the other end of the cavity is provided with a connecting rod. A cavity cover plate is provided, a connection hole is arranged on the cavity cover plate, an electrical connection head is arranged on the connection hole on the cavity cover plate, and the electric connection head and the connection post are connected by a banana joint. The cavity is placed in the reserved window of the GIS pipeline. When performing GIS partial discharge detection under steep front impact, the high-frequency signal receiving component receives the initial measurement signal and transmits it to the electrical connector through the connecting rod, connecting column and banana joint , so as to realize the extraction of high frequency signal of partial discharge under the impact of steep front.

Description

Partial discharge high frequency signal extraction device and measurement system under steep front shock

technical field

The present application relates to the technical field of power electronics, and in particular, to a device and a measurement system for extracting high-frequency signals of partial discharge under steep front impact.

Background technique

For a long time, those skilled in the art have reached a consensus in the industry: in the UHV field, in order to detect equipment defects, the impact withstand voltage test is usually performed in the equipment on-site handover test, while in the UHV field, only the power frequency withstand voltage test is usually performed. . However, with the large-scale construction and operation of ultra-high voltage power grids in recent years, the probability of equipment accidents before and during operation continues to increase, which shows that only the power frequency withstand voltage test of ultra-high voltage equipment can not meet the equipment requirements Safety requirements. Moreover, for ultra-high voltage equipment, such as Gas Insulated Switchgear (GIS equipment for short), although the power frequency voltage used in the power frequency withstand voltage test can excite and expose equipment defects, because the power frequency voltage is continuous, Exciting and exposing equipment defects will further expand the equipment defects and cause more damage to the equipment.

For ultra-high voltage equipment such as GIS equipment, due to its "transient" characteristics, the impulse voltage will not expand the defect while exciting and exposing the defect, and, for GIS equipment with fixed insulation defects, the wave head of the impulse voltage Time determines the breakdown characteristics of GIS. The shorter the wave head time, the better the effect of finding defects. Therefore, using the steep-front impulse voltage to measure the partial discharge of the GIS equipment under the steep-front impulse can effectively find the local defects in the GIS equipment.

In the prior art, for the partial discharge measurement of GIS equipment, AC voltage or DC voltage is mostly used as the excitation voltage, and the ultrasonic wave method, ultra-high frequency method and pulse current method are mostly used in the measurement methods. For detection, due to its short wave front time and no continuity, the above measurement methods have great limitations. Therefore, the measurement methods in the prior art cannot realize the partial discharge measurement of GIS equipment under the impact of steep front.

SUMMARY OF THE INVENTION

The present application provides a partial discharge high-frequency signal extraction device and measurement system under the impact of a steep front, so as to solve the problems existing in the prior art.

The application provides a device for extracting high-frequency signals of partial discharge under the impact of a steep front, comprising: a cavity; wherein:

One end of the cavity is provided with a bottom surface of the cavity, and a communication hole is provided on the bottom surface of the cavity; A first insulating layer is provided between the receiving part and the bottom surface of the cavity.

A connecting rod is provided on the side of the high-frequency signal receiving part located on the bottom surface of the cavity, the connecting rod is located in the communication hole, and the end of the connecting rod away from the high-frequency signal receiving part is located in the cavity In the body, the diameter of the connecting rod is smaller than the diameter of the communication hole; one end of the connecting rod located in the cavity is provided with a connecting post, and the diameter of the connecting post is larger than the diameter of the connecting rod; An insulating sleeve is arranged on the periphery, and the diameter of the insulating sleeve in the cavity is larger than the diameter of the communication hole.

The other end of the cavity is provided with a cavity cover, a second insulating layer is provided between the cavity cover and the cavity, a connection hole is provided on the cavity cover, and the cavity cover is The board is provided with an electrical connection head at the connection hole, a banana joint is arranged between the electrical connection head and the connection post, and the electrical connection head and the connection post are connected through the banana joint.

Optionally, the cavity is provided with a butt flange on one side of the cavity cover plate, and a sealing groove is provided on the butt surface of the butt flange.

Optionally, the high-frequency signal receiving component is a disk structure made of metal.

Optionally, the connecting rod is a threaded rod, the connecting column is provided with a threaded blind hole, and the connecting rod and the connecting column are threadedly connected through the threaded blind hole.

Optionally, the cavity and the cavity cover are made of stainless steel.

Optionally, the sealing groove is filled with sealing packing.

The present application also provides a partial discharge high-frequency signal measurement system under steep frontier impact, including: an extraction device, a signal processing module, a signal transmission module and a display terminal; wherein:

The signal processing module is connected to the electrical connector of the extraction device, and the signal processing module is used to perform high-frequency filtering on the initial measurement signal extracted by the extraction device, and output a high-frequency measurement signal.

One end of the signal transmission module is connected to the signal processing module, and the other end is connected to the display terminal; the transmission processing module is used for transmitting the high-frequency measurement signal to the display terminal.

Optionally, the signal processing module includes a high-frequency filter circuit, and the high-frequency filter circuit is used to remove low-frequency noise in the initial measurement signal and output a high-frequency measurement signal.

Optionally, the signal transmission module includes an analog-to-digital converter, and the analog-to-digital converter is used to convert the high-frequency measurement signal into a digital signal that can be recognized by the display terminal.

Optionally, the signal transmission module further includes an electro-optical converter, a photoelectric converter and an optical cable; the electro-optical converter is located on one side of the analog-to-digital converter and is connected to the analog-to-digital converter, and the optoelectronic converter It is located on one side of the display terminal and is connected to the display terminal, and the electro-optical converter and the optical-electrical converter are connected through the optical cable.

It can be seen from the above technical solutions that the present application provides a device for extracting high frequency signals of partial discharge under steep front impact, comprising: a cavity; one end of the cavity is provided with a bottom surface of the cavity, and a communication hole is provided on the bottom surface of the cavity; A high-frequency signal receiving component is arranged on the side outside the cavity, and a first insulating layer is arranged between the high-frequency signal receiving component and the bottom surface of the cavity; the side of the high-frequency signal receiving component located on the bottom surface of the cavity is provided with a connecting rod , the connecting rod is located in the communication hole, the end of the connecting rod away from the high-frequency signal receiving part is located in the cavity, and the diameter of the connecting rod is smaller than the diameter of the connecting hole; one end of the connecting rod located in the cavity is provided with a connecting column, and the diameter of the connecting column is larger than that of the connecting rod The diameter of the connecting rod is provided with an insulating sleeve on the periphery of the connecting rod, and the diameter of the insulating sleeve in the cavity is larger than the diameter of the connecting column, so that the bottom surface of the cavity is insulated from the connecting rod and the connecting column; the other end of the cavity is provided with a cavity cover plate The cavity cover plate is provided with a connection hole, the cavity cover plate is provided with an electrical connection head at the connection hole, a banana joint is arranged between the electric connection head and the connection post, and the electrical connection head and the connection post are connected by the banana joint. When in use, place the cavity in the reserved window of the GIS pipeline, so that the high-frequency signal receiving component is located in the GIS pipeline. When performing partial discharge detection in the GIS under the steep front impact, the high-frequency signal receiving component receives the steep front impulse voltage. The initial measurement signal of the partial discharge of the GIS equipment, the initial measurement signal is transmitted to the electrical connector through the connecting rod, connecting column and banana joint insulated from the cavity, so as to realize the extraction of the high-frequency signal of the partial discharge under the impact of the steep front. In addition, the present application also provides a partial discharge high-frequency signal measurement system under steep front impact, including the extraction device provided by the present application, a signal processing module, a signal transmission module and a display terminal; an electrical connector between the signal processing module and the measurement device connected to receive the initial measurement signal from the extraction device, perform high-frequency filtering on the initial measurement signal, and output the high-frequency measurement signal; one end of the signal transmission module is connected to the signal processing module, and the other end is connected to the display terminal; the signal processing module is used for The high-frequency measurement signal is transmitted to the display terminal. The measurement system provided by this application extracts the initial measurement signal through the measurement device, filters the initial measurement signal through the signal processing module, removes low-frequency noise, and obtains the high-frequency partial discharge under the impact of the steep front. Finally, the measurement signal is transmitted to the display terminal through the signal transmission module, so that the high-frequency partial discharge signal of the GIS equipment under the impact of the steep frontier is quantified and displayed on the display terminal, thereby realizing the measurement of the high-frequency signal of the partial discharge under the impact of the steep frontier.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Other drawings can also be obtained from these drawings.

1 is a schematic structural diagram of a partial discharge high-frequency signal extraction device under steep frontal impact shown in an embodiment of the application;

FIG. 2 is a schematic structural diagram of a partial discharge high-frequency signal measurement system under steep frontal impact shown in an embodiment of the application;

FIG. 3 is a schematic structural diagram of another partial discharge high-frequency signal measurement system under steep frontal impact shown in an embodiment of the application;

Among them: 1- cavity, 11- bottom surface of cavity, 12- connecting hole, 2- high frequency signal receiving part, 31- first insulating layer, 32- insulating sleeve, 33- second insulating layer, 4- connecting rod , 5-connecting column, 51-threaded blind hole, 6-cavity cover, 61-connecting hole, 7-electrical connector, 8-banana connector, 9-butt flange, 91-sealing groove, 911-sealing packing , 10-extraction device, 20-signal processing module, 201-high frequency filter circuit, 30-signal transmission module, 301-analog-to-digital converter, 302-electrical-optical converter, 303-optical-electrical converter, 304-optical cable, 40- Display terminal module, 100-GIS pipeline, 110-GIS equipment, 120-Reserved window.

Detailed ways

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

Example 1

An embodiment of the present application provides a device for extracting a high-frequency signal of partial discharge under a steep front impact. As shown in FIG. 1 , the device for extracting a high-frequency signal of a partial discharge under the impact of a steep front provided by the embodiment of the present application includes:

Cavity 1; one end of the cavity 1 is provided with a cavity bottom surface 11, and a communication hole 12 is provided on the cavity bottom surface 11; A first insulating layer 31 is arranged between the signal receiving part 2 and the bottom surface 11 of the cavity; the side of the high frequency signal receiving part 2 located on the bottom surface 11 of the cavity is provided with a connecting rod 4, and the connecting rod 4 is located in the communication hole 12, and the connecting rod 4. One end away from the high-frequency signal receiving part 2 is located in the cavity 1, and the diameter of the connecting rod 4 is smaller than the diameter of the communication hole 12; The diameter of the rod 4; the periphery of the connecting rod 4 is provided with an insulating sleeve 32, the diameter of the insulating sleeve 32 in the cavity 1 is larger than the diameter of the connecting column 5, and the insulating sleeve 32 connects the bottom surface 11 of the cavity with the connecting rod 4 and the connecting rod 5. The column 5 is insulated and isolated; the other end of the cavity 1 is provided with a cavity cover 6, a second insulating layer 33 is provided between the cavity cover 6 and the cavity 1, and a connection hole 61 is provided on the cavity cover 6, and the cavity The body cover 6 is provided with an electrical connector 7 at the connection hole 61 , a banana joint 8 is arranged between the electrical connector 7 and the connecting column 5 , and the electrical connector 7 and the connecting column 5 are connected through the banana joint 8 .

In this embodiment, the cavity 1 is installed in the reserved window 120 of the GIS pipeline 100, and the diameter of the reserved window 120 is slightly larger than the outer diameter of the cavity 1, so that the cavity 1 can be easily placed and taken out. After the cavity 1 is installed in the reserved window 120 and fixed, it is allowed to leave a gap between the cavity 1 and the reserved window 120 to cope with the deformation of the equipment caused by environmental factors, but the gap should not be too large, and an excessively large gap will not be used. Facilitates the fixation of the cavity 1 . In this embodiment, after the cavity 1 is installed, the high-frequency signal receiving component 2 is located in the GIS pipe 100 near the pipe wall, so that the overall structure of the GIS pipe 100 is not affected. The first insulating layer 31 and the insulating sleeve 32 are in contact with each other, so that the cavity 1 is reliably insulated from the high-frequency signal receiving component 2, the connecting rod 4 and the connecting column 5, and the second insulating layer 33 realizes the connection between the connecting column 5. Therefore, the measurement signal received by the high-frequency signal receiving component 2 will only be transmitted along the connecting rod 4 and the connecting column 5, and will be transmitted to the electrical connector 7 outside the cavity through the banana joint 8 , it will not transmit to the cavity 1 and cause the signal to be scattered, which is beneficial to improve the effect of signal extraction. When performing GIS partial discharge detection under the impact of steep front, the high-frequency signal receiving component 2 receives the initial measurement signal of the partial discharge of the GIS equipment 110 under the impact voltage of the steep front, and the initial measurement signal passes through the connecting rod 4 and the connecting column insulated from the cavity. 5 and the banana joint 8 are transmitted to the electrical connector 7, so as to realize the extraction of the high frequency signal of partial discharge under the impact of the steep front.

In this embodiment, the diameter of the connecting rod 4 is smaller than the diameter of the communication hole 12, the inner diameter of the insulating sleeve 32 is equal to the diameter of the connecting rod 4, and the outer diameter of the insulating sleeve 32 is equal to the diameter of the communication hole 12, so that the connecting rod 4, the insulation The sleeve 32 and the bottom surface 11 of the cavity form a reliable fixation. It should be noted that the relationship between the diameter of the connecting rod 4 and the diameter of the communication hole 12 should satisfy that the insulating sleeve 32 has a sufficient thickness, so that the thickness of the insulating sleeve 32 can ensure the realization of the bottom surface 11 of the cavity and the connecting rod 4 Reliable insulation. The specific value of the thickness of the insulating sleeve 32 is related to factors such as the impulse voltage strength, the material of the insulating sleeve 32 and the use environment of the equipment, and those skilled in the art can reasonably select the insulating sleeve according to various factors affecting the insulation of the insulating sleeve 32 The thickness of the barrel 32, therefore, the selection of the material and size of the insulating sleeve 32 does not make specific requirements in this embodiment.

In this embodiment, the diameter of the connecting column 5 is larger than the diameter of the connecting rod 4. Using the connecting column 5 with a larger diameter can reduce the loss of the initial measurement signal during transmission and improve the signal extraction effect. In accordance with the diameter of the connecting column 5 , the diameter of the insulating sleeve 32 in the cavity 1 is larger than the diameter of the communication hole 12 and larger than the diameter of the connecting column 5 , so that the connecting column 5 and the bottom surface 11 of the cavity form reliable insulation. The insulating sleeve 32 is located at a portion other than the diameter of the connecting column 5 , and can also extend toward the connecting column 5 , so as to improve the insulation, and also have the effect of fixing the connecting column 5 .

In an optional embodiment, the side of the cavity 1 located on the cavity cover plate 6 is provided with a butt flange 9 , and the side of the butt flange 9 located in the cavity 1 is provided with a sealing groove 91 . The docking flange 9 on the cavity 1 is used for screw connection and fixing with the cavity cover 6, and at the same time, a docking anti-flange structure can also be set on the reserved window 120 of the GIS pipeline 100, so as to realize the cavity 1 and the cavity 1. GIS pipeline 100 flange connection.

In an optional embodiment, the high-frequency signal receiving component 2 is a metal disk structure. A stainless steel material can be preferably used, so that the high-frequency signal receiving component 2 has the ability to resist corrosion and improve the service life of the extraction device.

In an optional embodiment, the connecting rod 4 is a threaded rod, the connecting column 5 is provided with a threaded blind hole 51 , and the connecting rod 4 and the connecting column 5 are threadedly connected through the threaded blind hole 51 . The cooperation of the threaded rod and the blind hole 51 makes the connection rod 4 and the connection column 5 tightly connected, which is conducive to signal transmission and improves the signal extraction effect.

In an alternative embodiment, the cavity 1 and the cavity cover 6 are made of stainless steel. Stainless steel has the ability to resist rust. The use of stainless steel for cavity 1 and cavity cover 6 can resist the rust of the extraction device caused by the complex external environment and improve the service life of the extraction device.

In an optional embodiment, the sealing groove 91 is filled with a sealing packing 911 . The sealing packing 911 can be made of common sealing materials such as ceramic fiber twisted ropes or rubber sealing rings, so as to improve the sealing effect between the cavity 1 and the GIS pipeline 100 .

It can be seen from the above technical solutions that the present application provides a device for extracting high frequency signals of partial discharge under steep front impact, comprising: a cavity; one end of the cavity is provided with a bottom surface of the cavity, and a communication hole is provided on the bottom surface of the cavity; A high-frequency signal receiving component is arranged on the side outside the cavity, and a first insulating layer is arranged between the high-frequency signal receiving component and the bottom surface of the cavity; the side of the high-frequency signal receiving component located on the bottom surface of the cavity is provided with a connecting rod , the connecting rod is located in the communication hole, the end of the connecting rod away from the high-frequency signal receiving part is located in the cavity, and the diameter of the connecting rod is smaller than the diameter of the connecting hole; one end of the connecting rod located in the cavity is provided with a connecting column, and the diameter of the connecting column is larger than that of the connecting rod The diameter of the connecting rod is provided with an insulating sleeve on the periphery of the connecting rod, and the diameter of the insulating sleeve in the cavity is larger than the diameter of the connecting column, so that the bottom surface of the cavity is insulated from the connecting rod and the connecting column; the other end of the cavity is provided with a cavity cover plate The cavity cover plate is provided with a connection hole, the cavity cover plate is provided with an electrical connection head at the connection hole, a banana joint is arranged between the electric connection head and the connection post, and the electrical connection head and the connection post are connected by the banana joint. When in use, place the cavity in the reserved window of the GIS pipeline, so that the high-frequency signal receiving component is located in the GIS pipeline. When performing partial discharge detection in the GIS under the steep front impact, the high-frequency signal receiving component receives the steep front impulse voltage. The initial measurement signal of the partial discharge of the GIS equipment, the initial measurement signal is transmitted to the electrical connector through the connecting rod, connecting column and banana joint insulated from the cavity, so as to realize the extraction of the high-frequency signal of the partial discharge under the impact of the steep front.

Embodiment 2

The embodiment of the present application provides a high-frequency partial discharge signal measurement system under steep frontier impact. As shown in FIG. 2 , the high-frequency partial discharge signal measurement system under steep frontier impact provided by the embodiment of the present application includes:

The extraction device 10 , the signal processing module 20 , the signal transmission module 30 and the display terminal 40 shown in the first embodiment of the present application; the signal processing module 20 is connected to the electrical connector 7 of the extraction device 10 , and the signal processing module 20 is used for the extraction The initial measurement signal extracted by the device 10 is subjected to high-frequency filtering to output a high-frequency measurement signal; one end of the signal transmission module 30 is connected to the signal processing module 20, and the other end is connected to the display terminal 40; the signal transmission module 30 is used to transmit the high-frequency measurement signal. to the display terminal 40 .

In an optional embodiment, the signal processing module 20 includes a high-frequency filter circuit 201, and the high-frequency filter circuit 201 is used to remove low-frequency noise in the initial measurement signal and output a high-frequency measurement signal. Due to the influence of various external factors, the initial measurement signal will contain low-frequency noise, and the low-frequency noise will be superimposed on the high-frequency signal of the partial discharge, which affects the accuracy of the measurement result. Therefore, in this embodiment, a high-frequency filter circuit 201 is used to remove the initial Measure the low-frequency noise in the signal, output the high-frequency measurement signal, and improve the accuracy of the measurement result. The structure of the high-frequency filter circuit and the use of the high-frequency filter circuit to perform high-frequency filtering belong to the common knowledge of those skilled in the art. Therefore, the structure of the high-frequency filter circuit 201 will not be repeated in this embodiment.

In an optional embodiment, the signal transmission module 30 includes an analog-to-digital converter 301 , and the analog-to-digital converter 301 is used to convert the high-frequency measurement signal into a digital signal that the display terminal 40 can recognize. Since the high-frequency measurement signal output from the signal processing module 20 is an analog signal, and the display terminal 40 is usually allowed to receive digital signals, in this embodiment, the analog signal is converted into a digital signal by the analog-to-digital converter 301, so as to display the terminal 40 receives processing, and at the same time, the digital signal is easily stored in the storage medium of the display terminal 40 for easy archiving and viewing.

As can be seen from the above technical solutions, the present application provides a partial discharge high-frequency signal measurement system under steep front impact, including the extraction device provided by the present application, a signal processing module, a signal transmission module and a display terminal; The electrical connector is connected for the extraction device to receive the initial measurement signal, perform high-frequency filtering on the initial measurement signal, and output the high-frequency measurement signal; one end of the signal transmission module is connected to the signal processing module, and the other end is connected to the display terminal; the signal processing module It is used to transmit the high-frequency measurement signal to the display terminal. The measurement system provided by this application extracts the initial measurement signal through the measurement device, filters the initial measurement signal through the signal processing module, removes the low-frequency noise, and obtains the partial discharge under the impact of the steep front. The high-frequency measurement signal is finally transmitted to the display terminal through the signal transmission module, so that the high-frequency partial discharge signal of the GIS equipment under the impact of the steep frontier is quantified and displayed on the display terminal, thus realizing the high-frequency signal of the partial discharge under the impact of the steep frontier. Measurement.

Embodiment 3

The embodiment of the present application provides another high-frequency partial discharge signal measurement system under the impact of steep front. As shown in FIG. 3, the difference between the embodiment of the present application and the second embodiment is:

The signal transmission module 30 further includes an electro-optical converter 302, a photoelectric converter 303, and an optical cable 304; , is connected to the display terminal 40 , and the electro-optical converter 302 and the electro-optical converter 303 are connected through an optical cable 304 .

Because the GIS pipeline 100 is sometimes hundreds of kilometers long, this requires remote measurement for the measurement of high-frequency partial discharge signals under the impact of steep fronts. In this embodiment, in order to enable the measurement system to have remote measurement capabilities, the The output end of the analog-to-digital converter 301 is provided with an electro-optical converter 302, which converts the digital signal into an optical signal, and uses an optical cable 304 to realize long-distance low-loss transmission. The display terminal 40 in this embodiment can be set in the detection station, and the photoelectric converter 303 is set before the display terminal 40, and the optical signal transmitted over a long distance is restored into a digital signal by connecting the optical cable 304 and the photoelectric converter 303, and sent to the The terminal 40 is displayed, thereby realizing the remote measurement of the high-frequency partial discharge signal under the impact of the steep front of the GIS equipment.

As can be seen from the above technical solutions, the present application provides a partial discharge high-frequency signal measurement system under steep front impact, including the extraction device provided by the present application, a signal processing module, a signal transmission module and a display terminal; The electrical connector is connected for the extraction device to receive the initial measurement signal, perform high-frequency filtering on the initial measurement signal, and output the high-frequency measurement signal; one end of the signal transmission module is connected to the signal processing module, and the other end is connected to the display terminal; the signal processing module It is used to transmit the high-frequency measurement signal to the display terminal. The measurement system provided by this application extracts the initial measurement signal through the measurement device, filters the initial measurement signal through the signal processing module, removes the low-frequency noise, and obtains the partial discharge under the impact of the steep front. The high-frequency measurement signal is finally transmitted to the display terminal through the signal transmission module, wherein the signal transmission module can convert the high-frequency measurement signal from a digital signal into an optical signal. It is transmitted to the display terminal, so that the high-frequency partial discharge signal under the impact of the steep front of the GIS equipment can be quantitatively displayed on the display terminal, thereby realizing the remote measurement of the high-frequency partial discharge signal under the impact of the steep front.

It should be noted that, in this document, relational terms such as "first" and "second" etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Other embodiments of the present application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of this application that follow the general principles of this application and include common knowledge or conventional techniques in the technical field not disclosed in this application . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise structures described above and illustrated in the accompanying drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. a kind of steep-front impacts lower shelf depreciation high-frequency signal extraction element, which is characterized in that including cavity (1)；

Described cavity (1) one end is provided with cavity bottom surface (11), is provided with intercommunicating pore (12) on the cavity bottom surface (11)；It is described Cavity bottom surface (11) is provided with high-frequency signal receiving part (2), the high-frequency signal in the side for being located at the cavity (1) outside The first insulating layer (31) are provided between receiving part (2) and the cavity bottom surface (11)；

The side that the high-frequency signal receiving part (2) is located at the cavity bottom surface (11) is provided with connecting rod (4), the connection Bar (4) is located in the intercommunicating pore (12), and the connecting rod (4) is located at far from one end of the high-frequency signal receiving part (2) In the cavity (1), the diameter of the connecting rod (4) is less than the intercommunicating pore (12) diameter；The connecting rod (4) is located at described One end in cavity (1) is provided with connecting column (5), and the diameter of the connecting column (5) is greater than the diameter of the connecting rod (4)；Institute The periphery for stating connecting rod (4) is provided with insulating sleeve (32), and diameter of the insulating sleeve (32) in the cavity (1) is greater than The diameter of the connecting column (5)；

Cavity (1) other end is provided with cavity cover board (6), is provided between the cavity cover board (6) and the cavity (1) Second insulating layer (33) is provided with connecting hole (61) on the cavity cover board (6), and the cavity cover board (6) is in the connecting hole (61) it is provided at electrical connector (7), banana connector (8) is provided between the electrical connector (7) and the connecting column (5), The electrical connector (7) is connect with the connecting column (5) by the banana connector (8).

2. extraction element according to claim 1, which is characterized in that the cavity (1) is located at the cavity cover board (6) Side is provided with abutted flange (9), and the side that the abutted flange (9) is located at the cavity (1) is provided with seal groove (91).

3. extraction element according to claim 1, which is characterized in that the high-frequency signal receiving part (2) is made of metal At disc structure.

4. extraction element according to claim 1, which is characterized in that the connecting rod (4) is threaded rod, the connecting column (5) it is provided with tapped blind hole (51), the connecting rod (4) and the connecting column (5) are connected by the tapped blind hole (51) screw thread It connects.

5. extraction element according to claim 1, which is characterized in that the cavity (1) and the cavity cover board (6) use Stainless steel is made.

6. extraction element according to claim 2, which is characterized in that be filled with airtight and watertight padding in the seal groove (91) (911)。

7. a kind of steep-front impacts lower shelf depreciation high frequency testing system, which is characterized in that the system comprises: right is wanted Ask extraction element described in 1-6 any one (10), signal processing module (20), signal transmission module (30) and display terminal (40)；

The signal processing module (20) connect with the electrical connector (7) of the extraction element (10), the signal processing The initial measurement signal that module (20) is used to extract the extraction element (10) carries out High frequency filter, output high frequency measurement letter Number；

Described signal transmission module (30) one end is connect with the signal processing module (20), the other end and the display terminal (40) it connects；The signal transmission module (30) is used to high-frequency signal measurement being transmitted to the display terminal (40).

8. measuring system according to claim 7, which is characterized in that the signal processing module (20) includes High frequency filter Circuit (201), the high-frequency filter circuit (201) are used to remove the low-frequency noise in initial measurement signal, export high frequency measurement Signal.

9. measuring system according to claim 7, which is characterized in that the signal transmission module (30) includes analog-to-digital conversion Device (301), the analog-digital converter (301) are used to high-frequency signal measurement being converted into what the display terminal (40) can identify Digital signal.

10. measuring system according to claim 9, which is characterized in that the signal transmission module (30) further includes electric light Converter (302), photoelectric converter (303) and optical cable (304)；The electric light converter (302) is located at the analog-digital converter (301) side is connect with the analog-digital converter (301), and the photoelectric converter (303) is located at the display terminal (40) one Side is connect with the display terminal (40), and the electric light converter (302) and the photoelectric converter (303) pass through the light Cable (304) connection.