CN106802358B

CN106802358B - Easy-to-detach radio frequency coil device for detecting composite insulator

Info

Publication number: CN106802358B
Application number: CN201510843830.5A
Authority: CN
Inventors: 李坤; 王欣; 周正炼; 李新宏; 杨荣双; 刘云鸿
Original assignee: Ruili Power Supply Bureau of Yunnan Power Grid Co Ltd
Current assignee: Ruili Power Supply Bureau of Yunnan Power Grid Co Ltd
Priority date: 2015-11-26
Filing date: 2015-11-26
Publication date: 2023-06-30
Anticipated expiration: 2035-11-26
Also published as: CN106802358A

Abstract

The utility model provides a just, dismantlement formula radio frequency coil device for composite insulator detects, includes flexible PCB board (10) and radio frequency coil, includes fracture (12) and lower fracture (14) go up fracture (12) with lower fracture (14) edge is equipped with first contact point (32) and second contact point (34) respectively, radio frequency coil includes first radio frequency coil (22) and second radio frequency coil (24), first radio frequency coil (22) and second radio frequency coil (24) follow respectively flexible PCB board (10) spiral is fixed locate on flexible PCB board (10) last fracture (12) with lower fracture (14) do not are equipped with connecting device (40), can make through connecting device (40) last fracture (12) with lower fracture (14) interconnect, go up fracture (12) with when lower fracture (14) connect, first contact point (32) with second contact point (34) electric connection. The radio frequency coil device has the advantage of convenient disassembly.

Description

Easy-to-detach radio frequency coil device for detecting composite insulator

Technical Field

The invention relates to a radio frequency coil, in particular to a detachable and installable flexible radio frequency coil for detecting a composite insulator.

Background

Nuclear magnetic resonance is a physical phenomenon that the nuclear magnetic moment of a substance atomic nucleus generates energy level separation under the action of an external magnetic field and generates energy level transition under the action of an external radio frequency magnetic field. Since 1946 us scientist Bloch, purcell et al found nuclear magnetic resonance absorption phenomenon, nuclear magnetic resonance technology has been unprecedented in the fields of spectroscopy, medical imaging and the like, and the progress of human society has been greatly promoted.

Nuclear magnetic resonance apparatuses to which nuclear magnetic resonance technology is applied include high-field nuclear magnetic resonance apparatuses and low-field nuclear magnetic resonance apparatuses. Common high-field nuclear magnetic resonance equipment such as nuclear magnetic resonance spectrometers, medical magnetic resonance imagers and the like have the disadvantages of large volume, heavy weight, poor mobility and the like, so that the application of the equipment in the field detection of actual samples (real-time monitoring of patient conditions) is limited; furthermore, the sample of the high-field nmr apparatus must be placed in a closed magnet cavity of a certain size to be measured, which makes it impossible to perform nondestructive inspection of a large sample having an arbitrary shape by high-field nmr. The low-field nuclear magnetic resonance equipment overcomes the defects of the high-field nuclear magnetic resonance equipment by the characteristics of being open, portable and capable of measuring samples with any shape, and gradually becomes the leading-edge subject of nuclear magnetic resonance technology research.

In nuclear magnetic resonance, whether high field nuclear magnetic resonance equipment or low field nuclear magnetic resonance equipment, the radio frequency magnetic field is generated by a radio frequency coil. The radio frequency coil has the functions of exciting and receiving nuclear magnetic resonance signals, namely, the H nuclear with specific frequency in the sample is triggered to generate magnetic resonance under the action of radio frequency pulse, and the induced nuclear magnetic resonance signals are received after the triggering pulse is closed. According to the nuclear magnetic resonance principle, the radio frequency magnetic field B1 generated by the radio frequency coil meets the following requirements: the method includes the steps that a radio-frequency magnetic field B1 generated by the method needs to be orthogonal to a static magnetic field B0 generated by a magnet structure in a target area; the radio frequency magnetic field is uniform as much as possible so as to excite more samples to generate resonance; the magnetic field strength of the radio frequency magnetic field is required to be as large as possible, so that the received nuclear magnetic resonance signal is as large as possible.

The composite insulator has the advantages of light weight, high mechanical strength, good pollution resistance and the like, and is widely applied to high-voltage transmission lines. However, with the rapid increase of the usage amount of the composite insulator and the increase of the running time of the net, the aging problem of the composite insulator is more and more concerned by the electric power running department. Because radio frequency coils often employ a closed loop configuration, they form a complete loop. However, such a closed ring structure cannot pass through the composite insulating core rod at the time of composite insulator detection, and thus has a drawback of difficult disassembly and installation.

Disclosure of Invention

In view of the above, it is desirable to provide a low cost, easy to disassemble and assemble radio frequency coil device for composite insulator detection.

In order to solve the technical problem, a conveniently detachable radio frequency coil device for detecting a composite insulator is provided, the device is used for detecting the composite insulator and comprises a flexible PCB and a radio frequency coil, the flexible PCB is of a spiral structure which is matched with the appearance of the composite insulator and comprises an upper fracture and a lower fracture, a first contact point and a second contact point are respectively arranged at the edges of the upper fracture and the lower fracture, the radio frequency coil comprises a first radio frequency coil and a second radio frequency coil, the first radio frequency coil and the second radio frequency coil are respectively and spirally fixed on the flexible PCB along the flexible PCB, one end of the first radio frequency coil is electrically connected with the first contact point, the other end of the first radio frequency coil is provided with a coil port in the position of the lower fracture, one end of the second radio frequency coil is provided with a coil port in the position of the upper fracture, the other end of the second radio frequency coil is electrically connected with the second contact point in the position of the lower fracture, the upper fracture and the lower fracture are respectively provided with a connecting device, and the upper fracture and the lower fracture can be mutually connected through the connecting device.

In the conveniently detachable radio frequency coil device for detecting the composite insulator, the connecting device comprises the magic tapes respectively arranged on the upper fracture and the lower fracture, and the first contact point and the second contact point are electrically connected through the mutual adhesion of the magic tapes of the upper fracture and the lower fracture.

In the detachable radio frequency coil device for detecting the composite insulator, the connecting device comprises adhesive tapes or buckles respectively arranged on the upper fracture and the lower fracture, and the first contact point and the second contact point are electrically connected through mutual adhesion and buckling of the adhesive tapes or buckles of the upper fracture and the lower fracture.

In the conveniently detachable radio frequency coil device for detecting the composite insulator, the first contact point and the second contact point are copper sheets respectively.

Compared with the prior art, the invention has the following remarkable technical effects:

the invention has the advantage of convenient disassembly and installation. After the radio frequency coil is disassembled, the radio frequency coil can be effectively re-adhered or buckled through the connecting device, and the functions of the radio frequency coil are not affected.

The invention has the advantages of simple structure, low cost and easy realization, and is suitable for wide popularization and application.

Drawings

Fig. 1 is a schematic top view of a detachable rf coil assembly for composite insulator detection according to the present invention.

Fig. 2 is a schematic perspective view of a detachable radio frequency coil device for detecting composite insulators.

Fig. 3 is a schematic structural view of the detachable radio frequency coil device for detecting the composite insulator, which is fixed on the umbrella skirt of the composite insulator.

Detailed Description

The detachable radio frequency coil device for detecting the composite insulator according to the present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 3, a detachable radio frequency coil device for detecting a composite insulator according to an embodiment of the present invention is used for detecting a composite insulator 50, and includes a flexible PCB 10 and a radio frequency coil, wherein the flexible PCB 10 has a spiral structure adapted to the shape of the composite insulator 50, the whole structure has a ring-shaped spiral structure, two ends of the flexible PCB 10 include an upper fracture 12 and a lower fracture 14, a first contact point 32 and a second contact point 34 are disposed at edges of the upper fracture 12 and the lower fracture 14, the radio frequency coil includes a first radio frequency coil 22 and a second radio frequency coil 24, the first radio frequency coil 22 and the second radio frequency coil 24 are spirally fixed on the flexible PCB 10 along the flexible PCB 10, one end of the first radio frequency coil 22 is electrically connected with the first contact point 32, the other end extends at the lower fracture 14 and has a coil port 222, one end of the second radio frequency coil 24 extends at the upper fracture 12 and has a coil port 242, the other end is electrically connected with the second contact point 34 at the lower fracture 12, the upper fracture 12 and the lower fracture 14 are respectively provided with a connecting device 40, the upper fracture 12 and the lower fracture 14 can be mutually connected through the connecting device 40, when the upper fracture 12 and the lower fracture 14 are connected, the first contact point 32 and the second contact point 34 are electrically connected, wherein the

coil ports

222 and 242 are both used for connecting an external matching circuit, the first radio frequency coil 22 and the second radio frequency coil 24 are mutually electrified through connecting the external matching circuit, after exciting current is injected, the current passes through the closed spiral coil structure, a radio frequency magnetic field is generated by the coil winding, and the composite insulator is detected through the radio frequency magnetic field.

In the detachable radio frequency coil device for detecting the composite insulator, the first contact point 32 and the second contact point 34 are respectively made of copper sheets or other conductive materials.

As shown in fig. 2 and 3, the connecting device 40 includes velcro strips respectively disposed on the upper fracture 12 and the lower fracture 14, and the velcro strips of the upper fracture 12 and the lower fracture 14 are adhered to each other to electrically connect the first contact point 32 and the second contact point 34.

In another embodiment of the present invention, instead of using a velcro, an adhesive tape or a buckle is provided at the upper fracture 12 and the lower fracture 14, and the first contact point 32 and the second contact point 34 are electrically connected by the adhesive tape or the buckle of the upper fracture 12 and the lower fracture 14 being adhered to each other and buckled.

In the invention, only the first contact point 32 and the second contact point 34 are exposed at the upper and

lower fracture

12 and 14 of the flexible PCB 10, when in use, the two ends of the flexible PCB 10 are slightly misplaced for a certain distance, and are pulled away and sleeved into the core rod of the composite insulator 50, so that the radio frequency coil is positioned on the umbrella skirt of the composite insulator 50, the two ends of the flexible PCB 10 are aligned, and the corresponding first contact point 32 and second contact point 34 are aligned, so that a complete spiral coil structure is formed at the two ends of the flexible PCB 10 through a connecting device. In the invention, the radio frequency coil can also be directly fixed on the umbrella skirt of the composite insulator by using adhesive materials such as glue, and finally coil ports at two ends of the radio frequency coil are connected with the matching circuit, after exciting current is injected, the current passes through the closed spiral coil structure, and a radio frequency magnetic field is generated by the coil winding.

The shape of the radio frequency coil in the invention is not limited, and can be square, round and the like; the coil can be made of other conductive materials such as aluminum.

The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a just, dismantlement formula radio frequency coil device for composite insulator detects which is used for detecting composite insulator (50), its characterized in that: the flexible printed circuit board (10) is of a spiral structure which is matched with the shape of the composite insulator (50), the flexible printed circuit board (10) comprises an upper fracture (12) and a lower fracture (14), a first contact point (32) and a second contact point (34) are respectively arranged at the edges of the upper fracture (12) and the lower fracture (14), the radio frequency coil comprises a first radio frequency coil (22) and a second radio frequency coil (24), the first radio frequency coil (22) and the second radio frequency coil (24) are respectively and fixedly arranged on the flexible printed circuit board (10) in a spiral mode along the flexible printed circuit board (10), one end of the first radio frequency coil (22) is electrically connected with the first contact point (32), the other end of the first radio frequency coil (22) extends to form a coil port (222) at the position of the lower fracture (14), the other end of the second radio frequency coil (24) is electrically connected with the second contact point (34) at the position of the lower fracture (12), the upper fracture (12) and the lower fracture (14) are electrically connected with each other through the fracture (40) when the upper fracture (12) and the lower fracture (14) are connected, the first contact point (32) and the second contact point (34) are electrically connected, wherein a coil port (222) of the first radio frequency coil (22) and a coil port (242) of the second radio frequency coil (24) are both used for being connected with an external matching circuit, the first radio frequency coil (22) and the second radio frequency coil (24) are mutually electrified through the connection of the external matching circuit, after excitation current is injected, the current passes through a closed coil structure, a radio frequency magnetic field is generated on the coil, and the composite insulator is detected through the radio frequency magnetic field;

the connecting device (40) comprises magic tapes respectively arranged on the upper fracture (12) and the lower fracture (14), and the first contact point (32) and the second contact point (34) are electrically connected through mutual adhesion of the magic tapes of the upper fracture (12) and the lower fracture (14);

the first contact point (32) and the second contact point (34) are copper sheets, respectively.

2. The easy-to-detach radio frequency coil device for composite insulator detection as set forth in claim 1, wherein: the connecting device (40) comprises adhesive tapes or buckles respectively arranged on the upper fracture (12) and the lower fracture (14), and the first contact point (32) and the second contact point (34) are electrically connected through mutual adhesion and buckling of the adhesive tapes or buckles of the upper fracture (12) and the lower fracture (14).