High-resistance coaxial shunt and detection system

Abstract

The invention provides a high-resistance coaxial shunt, which comprises an outer conductor, a central shaft conductor and a resistor body, and is characterized in that the outer conductor, the resistor body and the central shaft conductor are of cylindrical structures and are coaxially arranged from outside to inside; the resistor body is of a laminated structure, and the conductive length of the resistor body is larger than the physical length of the resistor body in the laminated state. According to the high-resistance coaxial shunt provided by the invention, the resistor body is arranged to be of the laminated structure, so that the conductive length of the resistor body can be effectively prolonged, and the resistance value is increased under the condition that the conductive area and the physical length of the resistor body are not changed. The invention also provides a current detection system.

Description

[Technical field]

[0001] The present invention relates to the technical field of electronic circuit detection, and in particular to a high-resistance coaxial shunt, a manufacturing method and a detection system. [Background technology]

[0002] In the field of electronic measurement, it is often necessary to measure high-frequency (above 100MHz) current waveforms. In order to reduce the parasitic inductance of the shunt, coaxial shunts are generally used in the industry to detect high-frequency currents. The working principle of the coaxial shunt is mainly based on Ohm's law, and accurate current measurement is achieved by measuring the relationship between current and voltage. Specifically, the coaxial shunt has a specific resistance value. When current passes through, a corresponding voltage drop will be generated at both ends of the shunt. This voltage drop is proportional to the current passing through. Therefore, the resistance value in the coaxial shunt is more important for detection, and it needs to be designed and manufactured in advance according to the current value or voltage value range to be measured.

[0003] However, the coaxial shunts in the prior art are limited by their size and the influence of the resistance material, and their resistance is generally small, usually between 0.01 ohms and 0.1 ohms, which makes it difficult to meet the needs of detection accuracy, especially for the detection of low-voltage and high-frequency currents. [Summary of the invention]

[0004] The present invention provides a high-resistance coaxial shunt, a manufacturing method and a detection system for solving the above-mentioned problem of low resistance, so as to increase the detection resistance and expand the scope of use.

[0005] The present invention provides a high-resistance coaxial shunt, comprising an outer conductor, a central axis conductor and a resistor. The outer conductor is provided with a containing cavity inside, the central axis conductor passes through the outer conductor, and the resistor is accommodated in the containing cavity. The outer conductor, the resistor and the central axis conductor are all cylindrical structures and are coaxially arranged from the outside to the inside; the resistor is arranged as a stacked structure, and the conductive length of the resistor is greater than the physical length of the resistor in a stacked state.

[0006] The present invention provides a current detection system, comprising a detection device and a high-resistance coaxial shunt; the high-resistance coaxial shunt comprises an outer conductor, a central axis conductor and a resistor, the outer conductor is provided with a containing cavity inside, the central axis conductor passes through the outer conductor, the resistor is accommodated in the containing cavity, the outer conductor, the resistor and the central axis conductor are all cylindrical structures, coaxially arranged from the outside to the inside; the resistor is arranged as a stacked structure, the conductive length of the resistor is greater than the physical length of the resistor in a stacked state; the detection device is electrically connected to the outer conductor and the central axis conductor.

[0007] Compared with the prior art, the high-resistance coaxial shunt provided by the present invention can effectively extend the conductive length of the resistor body by setting the resistor body as a stacked structure, thereby increasing the resistance value without changing the conductive area and physical length of the resistor body; the stacked setting will not cause the length of the high-resistance coaxial shunt to increase, and the stacked setting effectively utilizes the accommodating cavity and will not increase the volume of the high-resistance coaxial shunt.

[0008] The manufacturing method of the high-resistance coaxial shunt is simple. Compared with the prior art, a longer resistor is provided, and then the resistor is stacked, which not only effectively improves the resistance of the resistor, but also makes the entire manufacturing process very convenient.

[0009] In addition, the current detection system using the high-resistance coaxial shunt can measure low-voltage and high-frequency current signals by effectively increasing the resistance of the resistor, thereby expanding the application scope of the current detection system and effectively improving the accuracy of detecting high-voltage and high-frequency current signals.

Brief Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0011] Figure 1 is a structural block diagram of a current detection system provided by the present invention;

[0012] Figure 2 is a schematic diagram of the three-dimensional structure of the high-resistance coaxial shunt provided in the first embodiment of the present application;

[0013] Figure 3 is a three-dimensional structural exploded diagram of the high-resistance coaxial shunt provided in the first embodiment of the present application;

[0014] Figure 4 is a cross-sectional view of the high-resistance coaxial shunt provided in the first embodiment of the present application;

[0015] Figure 5 is an enlarged cross-sectional view of the resistor provided in the second embodiment of the present application

[0016] Figure 6 is an enlarged cross-sectional view of the resistor provided in the third embodiment of the present application; and

[0017] Figure 7It is an enlarged cross-sectional view of the resistor provided in the fourth embodiment of the present application. [Specific implementation method]

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] Please also see Figures 1 to 4 The current detection system 100 includes 30 and a high-resistance coaxial shunt 10. The high-resistance coaxial shunt 10 includes an outer conductor 1, a central axis conductor 5 and a resistor 3. The detection device 30 is electrically connected to the outer conductor 1 and the central axis conductor 5 for detecting high-frequency current signals.

[0024] The outer conductor 1 is provided with a housing cavity 101, the central axis conductor 5 penetrates the outer conductor 1, the resistor 3 is accommodated in the housing cavity 101, the outer conductor 1, the resistor 3 and the central axis conductor 5 are all cylindrical structures, and are coaxially arranged from the outside to the inside. The resistor 3 is arranged as a stacked structure, and the conductive length of the resistor 3 is greater than the physical length of the resistor 3 in the stacked state.

[0025] The high-resistance coaxial shunt 10 sets the resistor 3 into a stacked structure, thereby extending the conductive length of the resistor 3. According to the calculation formula of resistance R=ρ·L / S, it can be known that in order to increase the resistance of the resistor 3 without changing the material, the conductive length can be increased or the area through which the current passes can be reduced. However, the thickness of the resistor 3 in the prior art is at least 10 microns, and it is very easy to break if it is further made thinner. Therefore, the resistor 3 can effectively increase the conductive length of the resistor 3 without increasing the physical length of the resistor 3 through a stacked arrangement, thereby increasing the resistance of the resistor 3.

[0026] In order to improve the reliability of the resistor 3, the resistor 3 further includes a conductive film 35 and an insulating film 37. The conductive film 35 is stacked to extend the conductive length. The conductive film 35 includes a first conductive end 31 and a second conductive end 33. The first conductive end 31 is electrically connected to the central axis conductor 5, and the second conductive end 33 is electrically connected to the outer conductor 1. Since the conductive film 35 is stacked, the high-frequency current signal flowing on the conductive film 35 will flow into or out from the first conductive end 31 or the second conductive end 33, and the conductive length formed, that is, the length of the high-frequency current signal flowing through the conductive film 35 must be greater than the straight-line distance between the first conductive end 31 and the second conductive end 33.

[0027] The insulating sheet 37 is attached to the conductive film sheet 35 to prevent the conductive film sheet 35 from short-circuiting. Since the conductive film sheets 35 are stacked, if they are directly attached to each other, it is easy to cause the resistor 3 to short-circuit, and the actual resistance value does not increase. Therefore, by setting the insulating sheet 37, the stacked conductive film sheets 35 can be effectively spaced apart, so that the resistance value of the resistor 3 is stable.

[0028] It should be noted that the conductive film sheet 35 can be made of constantan or manganese copper, which has good conductivity and can be made thinner. With the stacking scheme, the resistance of the resistor 3 can be improved. The insulating sheet 37 can be made of polyimide film, which not only has very good insulation performance, but also can be made thinner. It is attached to the conductive film sheet 35, which will not cause the overall volume of the resistor 3 to be too large, and the volume of the resistor 3 can be effectively controlled. Since the accommodating cavity 101 is provided inside the conductive outer conductor 1, there is a certain space between the central axis conductor 5 and the outer conductor 1, and the resistor 3 can be set. Therefore, while effectively controlling the overall volume of the resistor 3, the accommodating cavity 101 can be fully utilized, and the volume of the high-resistance coaxial shunt 10 will not change.

[0029] In the first embodiment, the conductive film sheet 35 is made in one piece, folded and rolled into a cylindrical structure, the insulating sheet 37 is attached to the conductive film sheet 35, and the insulating sheet 37 is folded and rolled into a cylindrical structure along with the conductive film sheet 35. This setting method is simple and ingenious, and is easy to process. It only needs to enlarge the conductive film sheet 35, and then attach the insulating sheet 37 to the conductive film sheet 35 in advance, fold them together, and then roll them into a cylindrical structure, and then connect them with the central axis conductor 5 and the outer conductor 1. There are fewer processing steps and it is not easy to make mistakes.

[0030] Of course, the resistor body 3 can be bent an odd number of times, and correspondingly, the conductive film sheet 35 has an even number of layers, for example, if bent once, the number of layers is two; if bent three times, the number of layers is four, and so on. In the first embodiment, the resistor body 3 is bent once, and the conductive film sheet 35 includes a first conductive segment 351 and a second conductive segment 353. The first conductive segment 351 is provided with the first conductive end 31, and is located on the side of the conductive film sheet 35 close to the central axis conductor 5; the second conductive segment 353 is provided with the second conductive end 33, and is located on the side of the conductive film sheet 35 close to the outer conductor 1. The second conductive segment 353 is coaxially arranged with the first conductive segment 351, the outer conductor 1 and the central axis conductor 5, and the current flow direction of the second conductive segment 353 is opposite to that of the first conductive segment 351.

[0031] The high-resistance coaxial shunt 10 provided in the first embodiment can increase the resistance of the resistor 3 to about twice, and is only folded once, so problems are not likely to occur. This method can be used when the resistance increase of the resistor 3 is not required. Moreover, since the first conductive segment 351 and the second conductive segment 353 are both coaxially arranged with the outer conductor 1 and the central axis conductor 5, the high-frequency current signals passing through the first conductive segment 351 and the second conductive segment 353 can offset the interference of the magnetic field.

[0032] It should be noted that, since the conductive film sheet 35 only needs to be folded once, the insulating sheet 37 can be attached to only one side of the conductive film sheet 35, thereby blocking the first conductive segment 351 and the second conductive segment 353, and preventing the conductive film sheet 35 from short-circuiting. The other side does not need to be set, thereby reducing the production and processing cost. Of course, in another embodiment, after the conductive film sheet 35 is folded, the insulating sheet 37 can be sandwiched between two adjacent layers of the conductive film sheet 35, that is, a layer of the insulating sheet 37 is sandwiched between the first conductive segment 351 and the second conductive segment 353. In the scheme where the insulating sheet 37 and the conductive film sheet 35 are first attached and then folded together, two layers of the insulating sheet 37 will be sandwiched between the first conductive segment 351 and the second conductive segment 353. Compared with this, the method of sandwiching the insulating sheet 37 alone can save one layer of the insulating sheet 37, further reducing the production cost.

[0033] Please continue reading Figure 5 , Figure 5 A cross-sectional view of a high-resistance coaxial shunt 10 provided in the second embodiment of the present application. In order to further increase the resistance of the resistor 3, the conductive film sheet 35 can be further folded. The conductive film sheet 35 also includes at least one third conductive segment 355 and at least one fourth conductive segment 357. The third conductive segments 355 correspond to the fourth conductive segments 357 in number, and are stacked between the first conductive segments 351 and the second conductive segments 353 in interval layers, and are coaxially arranged with the first conductive segments 351 and the second conductive segments 353. The current flow direction of the third conductive segment 355 is opposite to that of the first conductive segment 351 and the fourth conductive segment 357.

[0034] Here, three times are taken as an example. The high-resistance coaxial shunt 10 provided in the second embodiment can increase the resistance of the resistor 3 to about four times. The resistor 3 is bent three times. Compared with the first embodiment, the conductive film 35 includes the first conductive segment 351, the second conductive segment 353, the third conductive segment 355 and the fourth conductive segment 357. Since they are all coaxially arranged, they just offset the interference of the magnetic field, and at the same time will not increase the length or volume of the high-resistance coaxial shunt 10. Of course, in this embodiment, if the insulating sheet 37 is first pasted and then folded, it needs to be pasted on both sides of the conductive film sheet 35 to avoid short circuit; similarly, the insulating sheet 37 can also be added in a separate clamping manner, which can greatly reduce the processing cost.

[0035] Please continue reading Figure 6 , Figure 6 A cross-sectional view of a high-resistance coaxial shunt 10 provided in the third embodiment of the present application. In order to facilitate the installation of the resistor 3, the resistor 3 is bent an even number of times. The conductive film sheet 35 includes a first conductive segment 351, a second conductive segment 353 and a third conductive segment 355. The first conductive segment 351 is provided with the first conductive end 31, which is located on the side of the conductive film layer close to the central axis conductor 5; the second conductive segment 353 is provided with the second conductive end 33, which is located on the side of the conductive film layer close to the outer conductor 1; the third conductive segment 355, the second conductive segment 353, the first conductive segment 351, the outer conductor 1 and the central axis conductor 5 are all coaxially arranged, the third conductive segment 355 is arranged between the second conductive segment 353 and the first conductive segment 351, and the current flow direction of the third conductive segment 355 is opposite to that of the second conductive segment 353 and the first conductive segment 351.

[0036] Taking folding twice as an example, the high-resistance coaxial shunt 10 provided in the third embodiment can increase the resistance of the resistor 3 to about three times. The two ends of the third conductive segment 355 are respectively connected to the first conductive segment 351 and the second conductive segment 353. It can be seen from the cross-sectional view that the first conductive end 31 and the second conductive end 33 are not arranged on the same side. Compared with the first and second embodiments, the arrangement of the third embodiment is convenient for the installation of the resistor 3. The second conductive end 33 can abut against the outer conductor 1, thereby effectively installing and fixing the resistor 3; moreover, the first conductive end 31 and the second conductive end 33 are far apart and are not easy to contact each other, which improves the reliability of the resistor 3.

[0037] Correspondingly, the first conductive segment 351, the second conductive segment 353, the third conductive segment 355 and the outer conductor 1 can cancel each other's magnetic field interference, and do not affect the normal use of the high-resistance coaxial shunt 10. Of course, the insulating sheet 37 can also be arranged in a manner of first pasting and then folding, or can be arranged separately, which will not be described in detail here.

[0038] Please continue reading Figure 7 , Figure 7 This is a cross-sectional view of a high resistance coaxial shunt 10 provided in the fourth embodiment of the present application. In order to further increase the resistance of the resistor 3, the conductive film 35 further includes at least one fourth conductive segment 357, the number of the third conductive segment 355 is one more than the fourth conductive segment 357, the fourth conductive segment 357 is sandwiched between two adjacent third conductive segments 355, and the current flow direction of the fourth conductive segment 357 is the same as that of the second conductive segment 353 and the first conductive segment 351.

[0039] In the fourth embodiment, the resistor 3 is folded four times, and the high-resistance coaxial shunt 10 can increase the resistance of the resistor 3 to about five times. The conductive film 35 includes a first conductive segment 351, a second conductive segment 353, two third conductive segments 355 and a fourth conductive segment 357. The two ends of the fourth conductive segment 357 are respectively connected to the outer third conductive segment 355 and the inner third conductive segment 355, the outer third conductive segment 355 is connected to the second conductive segment 353, and the inner third conductive segment 355 is connected to the first conductive segment 351. The first conductive segment 351, the second conductive segment 353, the two third conductive segments 355, the fourth conductive segment 357 and the outer conductor 1 can offset the interference of the magnetic field, and do not affect the normal use of the high-resistance coaxial shunt 10. Of course, the setting method of the insulating sheet 37 can also be first attached and then folded, or it can be clamped separately, which will not be repeated here.

[0040] Therefore, the first to fourth embodiments can effectively improve the resistance value of the resistor 3. During the manufacturing process, the number of folding times can be selected according to actual needs, and the conductive film sheet 35 and the insulating sheet 37 are correspondingly arranged. In the above embodiments, the conductive film sheet 35 is integrally arranged, and the resistor 3 is manufactured by folding and winding.

[0041] It should be noted that, in another embodiment, at least two conductive thin film sheets 35 can be arranged on the resistor 3, each conductive thin film sheet 35 is stacked, and one side of the two adjacent conductive thin film sheets 35 is electrically connected, so as to extend the conductive length of the conductive thin film sheet 35; and the insulating sheet 37 is sandwiched between the two adjacent conductive thin film sheets 35. In this embodiment, there is no need to bend and form, and the conductive thin film sheets 35 can be directly bonded and arranged, and then wound into a cylindrical structure, and the conductive thin film sheets 35 of each adjacent layer are electrically connected by welding. This arrangement can make the conductive thin film sheet 35 not easily damaged or broken at the bend, thereby increasing the stability of the resistor 3. Moreover, the number of the conductive thin film sheets 35 can be flexibly set according to the requirements of the resistance value of the resistor 3. Of course, the conductive path and layout of each layer of the conductive thin film sheets 35 can refer to the above embodiments, and will not be repeated here.

[0042] It should be emphasized here that the conductive length of the resistor body 3 refers to the L in the resistance calculation formula R=ρ·L / S. In the above embodiment, it refers to the length of the high-frequency current signal flowing through the conductive film sheet 35. Taking the fourth embodiment as an example, the high-frequency current signal flows through the first conductive segment 351, the third conductive segment 355 of the inner layer, the fourth conductive segment 357, the third conductive segment 355 of the outer layer and the second conductive segment 353 in sequence, and the conductive length is the above five conductive segments. Correspondingly, the physical length of the stacked state of the resistor body 3 refers to the length in the physical space when the resistor body 3 is installed, which is equivalent to the length of a layer of the conductive film sheet 35 or a conductive segment. Compared with the conductive length, the difference between the two is nearly 4 times.

[0043] In addition, in order to facilitate the installation of the resistor 3, the outer conductor 1 is provided with an annular ridge 11, which cooperates with the resistor 3 and abuts the second conductive end 33. The outer conductor 1 cooperates with the central axis conductor 5 through the ridge 11 to fix the position of the resistor 3. Of course, if the bending parts of the conductive film sheet 35 are covered with the insulating sheet 37, one side of the resistor 3 can completely abut the ridge 11; if it is not completely covered, it may cause a short circuit of the resistor 3. Therefore, only the second conductive end 33 can be electrically connected to the ridge 11. Similarly, the central axis conductor 5 can also cooperate with the resistor 3 and abut the first conductive end 31 by setting the corresponding ridge 11, which will not be described in detail here.

[0044] In order to further protect the resistor 3, an insulating member 7 may be provided between the outer conductor 1 and the central axis conductor 5. The insulating member 7 may engage the outer conductor 1 and the central axis conductor 5 at the same time, so that relative displacement does not occur between the outer conductor 1 and the central axis conductor 5. Since the conductive film sheets 35 are stacked in multiple layers, the overall structure of the resistor 3 is relatively fragile. If the outer conductor 1 and the central axis conductor 5 are displaced in a rotational or linear direction, the resistor 3 may be easily damaged. By providing the insulating member 7, the safety of the resistor 3 may be effectively improved, and the service life of the high-resistance coaxial shunt 10 may be extended.

[0045] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A high resistance coaxial shunt, comprising: An outer conductor, wherein a receiving cavity is provided inside the outer conductor; A central axis conductor, wherein the central axis conductor passes through the outer conductor; and The resistor body is accommodated in the accommodating cavity, the outer conductor, the resistor body and the central axis conductor are all cylindrical structures, coaxially arranged from the outside to the inside, and is characterized in that the resistor body is arranged as a stacked structure, and the conductive length of the resistor body is greater than the physical length of the resistor body in the stacked state.

2. The high resistance coaxial shunt according to claim 1, characterized in that: The resistor comprises: A conductive film sheet, wherein the conductive film sheets are stacked and arranged to extend the conductive length, wherein the conductive film sheet comprises a first conductive end and a second conductive end, wherein the first conductive end is electrically connected to the central axis conductor, and the second conductive end is electrically connected to the outer conductor; and An insulating sheet is attached to the conductive film sheet to prevent the conductive film sheet from short-circuiting.

3. The high resistance coaxial shunt according to claim 2, characterized in that: The conductive film sheet is made in one piece and is rolled into a cylindrical structure after being folded; The insulating sheet is attached to the conductive film sheet, and the insulating sheet is folded and rolled into a cylindrical structure along with the conductive film sheet; or after the conductive film sheet is folded, the insulating sheet is sandwiched between two adjacent layers of the conductive film sheets.

4. The high resistance coaxial shunt according to claim 2, characterized in that: The resistor is bent an odd number of times; the conductive film sheet comprises: A first conductive segment, the first conductive segment is provided with the first conductive end and is located at a side of the conductive film layer close to the central axis conductor; and The second conductive segment is provided with the second conductive end, which is located on the side of the conductive film layer close to the outer conductor. The second conductive segment is coaxially arranged with the first conductive segment, the outer conductor and the central axis conductor. The current flows in the second conductive segment in opposite directions to that in the first conductive segment.

5. The high resistance coaxial shunt according to claim 4, characterized in that: The conductive film sheet also includes at least one third conductive segment and at least one fourth conductive segment. The third conductive segments correspond to the fourth conductive segments in number. The spacing layers are stacked between the first conductive segment and the second conductive segment, and are coaxially arranged with the first conductive segment and the second conductive segment. The current of the third conductive segment flows in a direction opposite to that of the current of the first conductive segment and the fourth conductive segment.

6. The high resistance coaxial shunt according to claim 2, characterized in that: The resistor is bent an even number of times; the conductive film sheet comprises: A first conductive segment, wherein the first conductive segment is provided with the first conductive end and is located on a side of the conductive film layer close to the central axis conductor; A second conductive segment, the second conductive segment is provided with the second conductive end and is located on a side of the conductive film layer close to the outer conductor; and The third conductive segment, the second conductive segment, the first conductive segment, the outer conductor and the central axis conductor are all coaxially arranged, the third conductive segment is arranged between the second conductive segment and the first conductive segment, and the third conductive segment and the second conductive segment and the first conductive segment have opposite current flows.

7. The high resistance coaxial shunt according to claim 6, characterized in that: The conductive film sheet further includes at least one fourth conductive segment, the number of the third conductive segments is one more than the fourth conductive segment, the fourth conductive segment is sandwiched between two adjacent third conductive segments, and the fourth conductive segment has the same current flow direction as the second conductive segment and the first conductive segment.

8. The high resistance coaxial shunt according to claim 2, characterized in that: The resistor body is provided with at least two conductive thin film sheets, each of which is stacked, and one side of two adjacent layers of the conductive thin film sheets is electrically connected to extend the conductive length of the conductive thin film sheets; The insulating sheet is sandwiched between two adjacent layers of the conductive film sheets.

9. The high resistance coaxial shunt according to claim 2, characterized in that: The outer conductor is provided with an annular convex ridge, which cooperates with the resistor and abuts against the second conductive end.

10. A current detection system, characterized in that: include: Testing equipment; and According to the high-resistance coaxial shunt as described in any one of claims 1 to 9, the detection device is electrically connected to the outer conductor and the central axis conductor.

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