Flexible Rogowski coil and current detection device

Abstract

According to the flexible Rogowski coil and the current detection device, an outer sleeve, a shielding layer, a flexible bone core and a conductive core wire are concentrically fixed from outside to inside to form a circular ring, and an opening is formed in one side of the circular ring. One end of the coil on the flexible bone core is connected with the conductive core wire, and the other end passes through the shielding layer and the outer sleeve to the outside. One end of the conductive core wire penetrates out to be connected with the power connection spring, and the other end of the winding coil is connected with the connecting plug. The flexible Rogowski coil of the current detection device can be detached and replaced. When the coil breaks down, the coil can be conveniently replaced, the whole device does not need to be replaced, cost is saved, and maintenance efficiency is improved. According to the design, in actual use, once the flexible Rogowski coil is damaged and other faults occur, the flexible Rogowski coil can be rapidly replaced by a new coil, continuous and normal operation of the current detection device is ensured, the current detection device adapts to different use scenes and requirements, the flexibility and reliability of the device are enhanced, and wide application of the device in various fields is facilitated; such as power monitoring, electronic equipment detection and the like.

Description

Technical Field

[0001] The invention relates to the technical field of electronic detection, and in particular to a flexible Rogowski coil and a current detection device. Background Art

[0002] Flexible Rogowski Coil is a hollow toroidal coil used to measure AC current. It is a special form of Rogowski Coil, and its coil winding is usually made of soft materials, such as flexible printed circuit board (FPCB) or metal wire wound on a soft insulating substrate, which makes it easy to wrap around the conductor to be measured and adapt to conductors of various shapes and sizes.

[0003] In today's electrical field, accurate current measurement is of vital importance for power system operation monitoring, equipment performance evaluation, energy management, etc. With the continuous development of science and technology, various current measurement technologies have emerged. Among them, Rogowski coil, as a commonly used current measurement tool, has been widely used in many fields because of its advantages of non-contact measurement, wide measurement range and high accuracy.

[0004] The flexible Rogowski coil is an innovative development of the Rogowski coil technology. Its original design is to better adapt to complex measurement environments and diverse shapes of conductors to be measured. It is based on the principle of electromagnetic induction. When the conductor to be measured passes through the coil, an induced electromotive force will be generated in the coil. By measuring and processing the induced electromotive force, the current information of the conductor to be measured can be obtained. Compared with the traditional rigid Rogowski coil, the significant advantage of the flexible Rogowski coil lies in its bendable and deformable characteristics. This flexibility allows it to be easily wrapped around various irregularly shaped conductors, such as curved cables, special-shaped busbars, etc., to achieve more convenient and flexible current measurement. In some special parts of the power system, such as wiring in a narrow space or lines that need temporary monitoring, this advantage of the flexible Rogowski coil is particularly prominent, which can effectively solve the problem that traditional measuring tools are difficult to install and measure.

[0005] However, in actual use, the flexible Rogowski coil has also exposed some problems that need to be solved. When the conductor enters the coil, the coil needs to be forced to open and deform to accommodate the passage of the conductor. Under frequent and long-term use, this repeated opening and deformation will cause continuous mechanical stress on the windings in the coil. Over time, the windings may become fatigued. The fatigue of the windings will not only affect the electrical performance of the coil, resulting in a decrease in measurement accuracy, but may also cause short circuit or open circuit failures of the coil, making the flexible Rogowski coil unable to work properly, seriously affecting the accuracy and reliability of current measurement. This is undoubtedly a major hidden danger for some occasions that require high current measurement accuracy, such as power supply monitoring of precision electronic equipment and fault diagnosis of power systems.

[0006] In addition, the existing flexible Rogowski coil current detection device also has certain defects in design. In practical applications, due to various reasons, such as coil aging, damage, or the need to replace flexible Rogowski coils of different specifications according to different measurement requirements, it is often found that the replacement operation of the flexible Rogowski coil in the current detection device is very inconvenient. This may be due to the unreasonable structural design of the device, which makes the disassembly and installation process of the coil complicated and cumbersome, requiring a lot of time and manpower. Moreover, other parts of the device may be damaged during the replacement process, further increasing the maintenance cost and use risk of the equipment. This inconvenient replacement problem not only affects work efficiency, but also limits the flexibility and scalability of the current detection device, and cannot meet the ever-changing needs in practical applications.

[0007] In summary, although the flexible Rogowski coil has certain advantages in current measurement, the problems of winding fatigue during long-term use and the inconvenience of coil replacement in the existing current detection device have seriously restricted its further application and development. Therefore, it is necessary to improve and innovate the flexible Rogowski coil and its current detection device to solve these existing technical problems and improve the stability, reliability and convenience of current measurement. Summary of the invention

[0008] In view of the problems pointed out in the background technology, the present invention proposes a flexible Rogowski coil and a current detection device to solve the above technical problems.

[0009] The technical solution of the present invention is achieved in this way:

[0010] A flexible Rogowski coil comprises an outer sleeve, a shielding layer, a flexible bone core and a conductive core wire, wherein the outer sleeve, the shielding layer, the flexible bone core and the conductive core wire are fixed concentrically from outside to inside in sequence to form a circular ring, and one side of the circular ring is an opening; a winding coil is wound on the flexible bone core, one end of the winding coil is connected to the conductive core wire, and the other end of the winding coil passes through the shielding layer and the outer sleeve to extend to the outside of the outer sleeve; insulating isolation layers are respectively provided at both ends of the opening of the circular ring, one end of the conductive core wire passes through the isolation layer, and the end of the conductive core wire that passes through is connected to a power spring; the other end of the winding coil is connected to a plug connector.

[0011] The present invention is further configured such that a positioning connection column is provided on the outer sleeve, and the positioning connection column is radially extended along the circular ring.

[0012] The present invention is further configured such that the outer sleeve is made of plastic.

[0013] The present invention is further configured such that the flexible bone core is made of a flexible insulating material.

[0014] The present invention is further configured such that a plurality of positioning and connecting posts are provided, and the plurality of positioning and connecting posts are arranged at intervals in the circumferential direction of the circular ring.

[0015] A flexible Rogowski coil current detection device comprises a tubular jacket, one side of the jacket is provided with an opening, and the two sides of the opening of the jacket are respectively provided with clips, and also comprises the above-mentioned flexible Rogowski coil, the end surfaces of the two ends of the jacket are respectively provided with concave mounting grooves, the annular ring is installed in the mounting groove, and the clip is provided with an integrator corresponding to the annular ring; the other end of the winding coil is connected with one end of the integrator, and a power connection piece corresponding to a power connection spring is provided in the mounting groove, one end of the power connection piece is plug-connected with the other end of the integrator, and the other end of the power connection piece is connected with the power connection spring; the clip is also provided with an analog-to-digital conversion module connected with the integrator, the analog-to-digital conversion module is connected with a central processing unit, and a communication module is connected to the central processing unit; a positioning connection hole corresponding to the positioning connection column is provided on the side wall of the mounting groove, and an entry groove for the positioning connection column to enter the positioning connection hole is provided at the end of the jacket, and the width of the entry groove is smaller than the diameter of the positioning connection hole.

[0016] The present invention is further configured such that a switch is provided between the other end of the winding coil and the integrator.

[0017] The present invention is further configured such that a through groove is provided in the middle of the jacket and passes through two sides thereof, and also includes a binding rope that can pass through the through groove.

[0018] The present invention is further configured such that the ring is adaptively connected to the mounting groove.

[0019] The present invention is further configured such that the jacket is made of rubber material.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0021] The flexible Rogowski coil and current detection device provided by the present invention can be disassembled and replaced on the flexible Rogowski coil, so when the flexible Rogowski coil fails, the flexible Rogowski coil can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic structural diagram of the flexible Rogowski coil of the present invention.

[0024] Figure 2 It is a schematic diagram of the internal structure of the flexible Rogowski coil of the present invention.

[0025] Figure 3 The structure of the current detection device of the present invention is shown in FIG. Figure 1 .

[0026] Figure 4 The structure of the current detection device of the present invention is shown in FIG. Figure 2 .

[0027] Figure 5 The structure of the current detection device of the present invention is shown in FIG. Figure 3 .

[0028] Figure 6 The structure of the current detection device of the present invention is shown in FIG. Figure 4 .

[0029] Figure 7 This is a detection principle block diagram of the current detection device of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] For reference Figure 1-Figure 7 The present invention is described:

[0032] Embodiment: A flexible Rogowski coil comprises an outer sleeve 1 (the outer sleeve 1 is made of plastic and is flexible), a shielding layer 2 (the shielding layer 2 is made of metal material), a flexible bone core 3 (the flexible bone core 3 is made of rubber material), and a conductive core wire 4 (the conductive core wire 4 is made of conductive metal). The outer sleeve 1, the shielding layer 2, the flexible bone core 3, and the conductive core wire 4 are fixed concentrically from outside to inside in sequence to form a circular ring, and one side of the circular ring is an opening.

[0033] A coil 5 is spirally wound on the flexible bone core 3 , one end of the coil 5 is electrically connected to the conductive core wire 4 , and the other end of the coil 5 passes through the shielding layer 2 and the outer sleeve 1 to extend to the outside of the outer sleeve 1 .

[0034] Insulating isolation layers 6 are provided at both ends of the opening of the circular ring. One end of the conductive core wire 4 passes through the isolation layer 6. The end of the conductive core wire 4 is connected to a power spring 7. The other end of the winding coil 5 is connected to a plug connector 8.

[0035] The power spring 7 and the plug connector 8 serve as two power terminals of the flexible Rogowski coil.

[0036] The overall structure of the flexible Rogowski coil is composed of multiple parts, which cooperate with each other to achieve accurate measurement of current. It mainly includes core components such as outer sleeve 1, shielding layer 2, flexible bone core 3, conductive core wire 4 and winding coil 5. These components are relatively fixed concentrically from outside to inside to form a circular ring structure, and an opening is provided on one side of the circular ring. This opening plays an important role in the structure and provides convenience for subsequent installation and connection.

[0037] The outer sleeve 1 is made of plastic, which has good flexibility and insulation properties. Its flexibility allows the entire coil to adapt to objects of different shapes, making it easy to install and use. At the same time, the insulation performance can effectively prevent the external electric field from interfering with the internal signal of the coil, thereby ensuring the accuracy of the measurement. As the outermost protective structure of the coil, the outer sleeve 1 can not only protect other internal components from mechanical damage and the influence of the external environment, but also play an auxiliary role in electromagnetic shielding to a certain extent, reducing the interference of external electromagnetic fields on the coil measurement. For example, in some complex electromagnetic environments, the plastic outer sleeve can block a part of the stray electromagnetic field and improve the anti-interference ability of the coil.

[0038] The shielding layer 2 is made of metal material, and common metals such as copper and aluminum have good electrical conductivity and electromagnetic shielding performance. The metal shielding layer is mainly used to block the interference of the external electromagnetic field on the inside of the coil, and it can also prevent the electromagnetic field generated inside the coil from affecting the outside world. It can effectively reduce the impact of external electromagnetic noise on the measurement signal and improve the accuracy and stability of the measurement. For example, in the power system, there are various strong electromagnetic field sources around, and the shielding layer can ensure that the flexible Rogowski coil accurately measures the target current without being affected by other interfering currents.

[0039] The flexible bone core 3 is made of rubber material, and the rubber has good flexibility and elasticity. The flexible bone core made of rubber provides a support structure for the winding coil 5, and its flexibility enables the coil to better adapt to the shape changes of the conductor being measured. In actual use, when the coil is wrapped around conductors of different shapes, the flexible bone core can undergo corresponding deformation without causing excessive stress on the winding coil 5, thereby ensuring the stability and service life of the winding coil. In addition, the rubber material also has certain insulation properties, which further enhances the electrical safety of the coil.

[0040] The conductive core wire 4 is made of conductive metal, such as copper, and has good conductivity. The conductive core wire is a key path for current signal transmission. The signal generated by the measured current induced by the winding coil 5 is transmitted through the electrical connection with the conductive core wire 4. It transmits the electrical signal generated by the winding coil 5 to the subsequent measurement circuit or device for analyzing and processing the current. For example, in a current detection system, the conductive core wire transmits the current signal measured by the flexible Rogowski coil to an oscilloscope or data acquisition device for observation and analysis by technicians.

[0041] The coil 5 is spirally wound on the flexible bone core 3. This winding method is conducive to uniformly inducing the magnetic field changes generated by the measured current. One end of the coil 5 is electrically connected to the conductive core wire 4 to realize signal transmission, and the other end passes through the shielding layer 2 and the outer sleeve 1 to the outside of the outer sleeve 1. This design facilitates the connection with the external circuit. The coil 5 is the core component of the flexible Rogowski coil to realize current measurement. According to the principle of electromagnetic induction, when the measured current passes through the area surrounded by the coil, an induced electromotive force will be generated in the coil 5. This induced electromotive force is proportional to the rate of change of the measured current. By measuring and processing the induced electromotive force, the size of the measured current and related information can be accurately obtained. For example, in the fault detection of the power system, by analyzing the changes in the current signal induced by the coil 5, the current abnormality can be discovered in time, thereby judging whether there is a hidden fault.

[0042] The opening on one side of the ring is an important design feature of the flexible Rogowski coil. This opening makes it easier to wrap the coil around the conductor being measured during installation. Instead of inserting the conductor from one end of the coil, the coil can be directly put on the conductor through the opening, which greatly improves the efficiency and convenience of installation. Especially for some conductors that have been installed and are not convenient to remove, the opening design makes the application of the flexible Rogowski coil more flexible. For example, when monitoring the current of a running power cable, the coil can be quickly installed on the cable through the opening without affecting the normal operation of the cable.

[0043] An insulating layer 6 is provided at both ends of the circular opening. The insulating layer is usually made of a material with good insulating properties, such as rubber, plastic, etc. The main function of the insulating layer is to prevent short circuits between the conductive parts at both ends of the opening. When the coil is wrapped around the conductor, the parts at both ends of the opening may be at risk of short circuits due to contact or proximity. The setting of the insulating layer effectively avoids this situation and ensures the normal operation of the coil and the accuracy of the measurement. At the same time, the insulating layer can also play a certain mechanical protection role, reducing the wear and collision damage of the parts at both ends of the opening during installation and use.

[0044] One end of the conductive core wire 4 passes through the isolation layer 6 and is connected to a power spring 7, and the other end of the coil 5 passes through the shielding layer 2 and the outer sleeve 1 and is connected to a plug connector 8. The power spring 7 and the plug connector 8 serve as two power connection ends of the flexible Rogowski coil.

[0045] Power spring 7: The power spring is elastic and can provide a certain contact pressure when connected to ensure good contact with the external circuit. This elastic contact method can adapt to a certain degree of dimensional change and vibration, ensuring stable transmission of current signals in different working environments. For example, in some equipment with large vibration, the power spring can effectively prevent poor contact caused by vibration and ensure the continuity and stability of current measurement.

[0046] The plug connector provides a convenient plug-in connection method, which is convenient for quick connection and disconnection with external measuring equipment or circuits. When the measuring equipment needs to be replaced or the coil needs to be repaired, the circuit can be quickly connected and disconnected by plugging and unplugging the plug connector, which improves work efficiency. At the same time, the design of the plug connector can be standardized, making the flexible Rogowski coil compatible with a variety of different devices, enhancing its versatility and applicability.

[0047] The outer sleeve 1 is provided with positioning connecting columns 9, which are arranged along the radial extension of the ring. There are multiple positioning connecting columns 9, and the multiple positioning connecting columns 9 are arranged at intervals in the circumferential direction of the ring. The positioning connecting columns 9 and the outer sleeve 1 are arranged as one body. The outer sleeve 1 is provided with positioning connecting columns 9, which are arranged along the radial extension of the ring. This means that they extend vertically outward from the surface of the outer sleeve 1, and their direction plays a key role in the subsequent connection and positioning with the current detection device. There are multiple positioning connecting columns 9, which are arranged at intervals in the circumferential direction of the ring. This circumferential distribution enables precise positioning and connection from multiple directions during installation, ensuring the stability and position accuracy of the flexible Rogowski coil in the current detection device.

[0048] A flexible Rogowski coil current detection device comprises a tubular jacket 10 (the jacket 10 is made of rubber material), one side of the jacket 10 is opened, and clips 11 are respectively arranged on both sides of the opening of the jacket 10, and the clips 11 and the jacket 10 are arranged as one body. The conductor to be measured enters the jacket 10 from between the two clips 11. The jacket 10 is made of rubber material and has good flexibility and insulation performance. The flexibility of the rubber material enables the jacket 10 to adapt to conductors of different shapes and sizes to be measured, and it is convenient to wrap the conductor to be measured therein. At the same time, the insulation performance can prevent current leakage and external electromagnetic field interference with measurement. One side of the jacket 10 is opened, and this opening design facilitates the entry of the conductor to be measured. When installing, it is only necessary to insert the conductor to be measured into the jacket 10 from the opening. Clips 11 are respectively arranged on both sides of the opening of the jacket 10, and the clips 11 and the jacket 10 are arranged as one body. This integrated design enhances the integrity and stability of the structure. The clip 11 plays a role in fixing the conductor to be measured during the installation process. When the conductor to be measured enters the jacket 10, the clamping piece 11 can fix the conductor inside the jacket 10 by an appropriate clamping force, ensuring the relative position between the conductor and the flexible Rogowski coil is stable, thereby improving the accuracy of the measurement.

[0049] It also includes the above-mentioned flexible Rogowski coil, and the end faces at both ends of the jacket 10 are respectively provided with concave mounting grooves 12, and the circular ring (flexible Rogowski coil) is adapted to be installed in the mounting grooves 12. The end faces at both ends of the jacket 10 are respectively provided with concave mounting grooves 12, and these mounting grooves 12 are specially designed for installing flexible Rogowski coils. The shape and size of the mounting grooves 12 match the circular ring shape of the flexible Rogowski coil, so that the flexible Rogowski coil can be installed exactly therein. This tightly fitting installation method not only ensures the stability of the coil in the device, but also ensures that the relative position between the coil and the conductor to be measured is accurate, which is conducive to accurate measurement of current.

[0050] The side wall of the installation groove 12 is provided with a positioning connection hole 18 corresponding to the positioning connection column 9, and the end of the jacket 10 is provided with an entry groove 19 for the positioning connection column 9 to enter the positioning connection hole 18, and the width of the entry groove 19 is smaller than the diameter of the positioning connection hole 18. When installing the flexible Rogowski coil, the ring is placed in the installation groove 12. At this time, the positioning connection column 9 on the outer sleeve 1 needs to be connected to the positioning connection hole 18 on the side wall of the installation groove 12. In order to facilitate the positioning connection column 9 to enter the positioning connection hole 18, the end of the jacket 10 is provided with an entry groove 19 for the positioning connection column 9 to enter. The width of the entry groove 19 is smaller than the diameter of the positioning connection hole 18. This design can play a guiding and positioning role during installation. When the positioning connection column 9 enters through the entry groove 19, it can be accurately inserted into the positioning connection hole 18 to achieve precise positioning and connection. Such a design ensures that the installation position of the flexible Rogowski coil in the current detection device is accurate and avoids measurement errors caused by improper installation.

[0051] An integrator 13 corresponding to the circular ring is provided on the clip 11. The plug connector 8 at the other end of the winding coil 5 is plug-connected to one end of the integrator 13 (the integrator 13 is provided with a plug hole plug-connected to the plug connector 8). The main function of the integrator is to integrate and restore the signal output by the flexible Rogowski coil to obtain an analog signal proportional to the measured pulse current. When the flexible Rogowski coil senses the changing magnetic field generated by the measured current, it will output an induced electromotive force signal proportional to the current change rate. This signal needs to be integrated by the integrator before it can be restored to an analog signal proportional to the measured current. The plug-in connection method of the plug connector 8 and the integrator 13 is convenient and fast, and is easy to disassemble and install when the flexible Rogowski coil or the integrator needs to be replaced. At the same time, this plug-in connection method can also ensure the stability and reliability of signal transmission.

[0052] A power connection piece 14 corresponding to the power connection spring 7 is provided in the mounting groove 12, one end of the power connection piece 14 is connected to the other end of the integrator 13, and the other end of the power connection piece 14 is connected to the power connection spring 7, and the power connection piece 14 is arranged in the clamp 11. The power connection spring 7 is electrically connected to the integrator 13 through the power connection piece 14. The elasticity of the power connection spring 7 can ensure good contact with the power connection piece 14 during connection, and can maintain a stable electrical connection even when subjected to certain vibrations or external forces. The power connection piece 14 acts as a bridge in the signal transmission process, transmitting the signal output by the flexible Rogowski coil to the integrator 13 through the power connection spring 7, and then processed by the integrator 13.

[0053] The clip 11 is also provided with an analog-to-digital conversion module 15 connected to the integrator 13. The analog-to-digital conversion module 15 is connected to a central processing unit 16. The function of the analog-to-digital conversion module 15 is to convert the analog signal output by the integrator 13 into a discrete digital signal. In modern electronic measurement and control systems, digital signals are more convenient to store, process and transmit. The central processing unit 16 is used to perform calculations on the digital signal output by the A / D conversion module to obtain a measured pulse signal. The central processing unit 16 can analyze and calculate the digital signal according to a preset algorithm to obtain an accurate current measurement value.

[0054] The central processing unit 16 is connected to a communication module 17. The central processing unit 16 is connected to a communication module 17. The communication module 17 is used to communicate with the outside world. It can transmit the current measurement data obtained after the central processing unit 16 is processed to other devices or systems to achieve data sharing and remote monitoring. For example, in an electric power system, the current detection device can transmit the measurement data to the monitoring center through the communication module 17, so that the staff can understand the operating status of the electric power equipment in real time, detect abnormal conditions in time and take corresponding measures. The communication module 17 can adopt a variety of communication methods, such as wired communication (such as Ethernet, RS485, etc.) or wireless communication (such as Bluetooth, Wi-Fi, ZigBee, etc.), and select according to the needs of the actual application scenario.

[0055] A switch 20 is provided between the other end of the winding coil 5 and the integrator 13. The switch 20 can control the on and off of the current signal on the winding coil 5, thereby controlling whether the flexible Rogowski coil is enabled. The switch 20 is located between the other end of the winding coil 5 (the end connected to the plug connector 8) and the integrator 13, and it plays the role of a key connection control node in the circuit. When the winding coil 5 senses the signal generated by the measured current, the signal needs to be transmitted to the integrator 13 through the switch 20 for subsequent processing. This connection method enables the switch 20 to directly control the on and off path of the output signal of the winding coil 5, thereby effectively intervening in the entire current detection process. The switch 20 can control the on and off of the current signal on the winding coil 5, thereby realizing the control of whether the flexible Rogowski coil is enabled. In practical applications, this function has great flexibility. For example, in a multi-channel current detection system, there may be multiple flexible Rogowski coils simultaneously to monitor currents of different circuits or devices. When a specific circuit or device needs to be focused on or tested separately, the switch 20 corresponding to other flexible Rogowski coils can be turned off to enable only the target flexible Rogowski coil, thereby reducing unnecessary signal interference and data processing, and improving the pertinence and accuracy of the measurement. In some complex measurement scenarios, you may encounter a situation where you need to temporarily stop the measurement of a flexible Rogowski coil. For example, when maintaining or debugging a running power system, the current measurement of some parts may interfere with the maintenance operation or no real-time monitoring is required at a specific stage. At this time, by cutting off the signal transmission of the corresponding flexible Rogowski coil through the switch 20, its measurement function can be easily suspended and re-enabled when needed, meeting the dynamic needs in different measurement scenarios. When a flexible Rogowski coil or a circuit part connected to it fails, the switch 20 can isolate the fault. By turning off the switch 20 corresponding to the faulty coil, it can be separated from the entire current detection system to avoid the impact of the fault on other normal components and the measurement process. In this way, technicians can more conveniently troubleshoot and locate faults without having to find the fault point in a complex overall system, greatly improving the efficiency and accuracy of troubleshooting. When the flexible Rogowski coil needs to be maintained, calibrated or replaced, the switch 20 also makes the operation more convenient. After closing the switch 20, the coil can be safely disassembled, repaired or replaced without affecting other running measurement channels and equipment. At the same time, after replacing a new flexible Rogowski coil, by opening the switch 20, it can be quickly reintegrated into the current detection system for testing and use, reducing the interruption time of the entire system operation due to equipment maintenance and replacement.

[0056] The middle part of the jacket 10 is provided with a through slot 21 that runs through both sides thereof, and also includes a binding rope 22 that can pass through the through slot 21. When the conductor to be measured enters the jacket 10, the binding rope 22 passes through the through slot 21 and binds and constrains the conductor to be measured on the side away from the opening of the jacket 10. In the actual measurement process, the conductor to be measured may move due to external factors (such as vibration, external force pulling, etc.). If the position of the conductor is unstable, the relative position between it and the flexible Rogowski coil will change, thereby affecting the induction effect of the coil on the current and the measurement accuracy. Through the bundling effect of the binding rope, the conductor can be firmly fixed at a specific position inside the jacket, reducing the measurement error caused by the movement of the conductor.

[0057] The flexible Rogowski coil measures current based on the principle of electromagnetic induction. When the conductor to be measured is fixed and evenly distributed inside the coil, the magnetic field distribution induced by the coil will also be more uniform and stable. By binding the conductor to the side away from the jacket opening, the position of the conductor in the jacket can be more regular, which is conducive to the coil to better sense the changes in the magnetic field around the conductor. This can improve the accuracy and reliability of the measurement, so that the measurement results more accurately reflect the true value of the measured current.

[0058] Steps:

[0059] First, the conductor to be measured is inserted into the jacket 10 from the opening side thereof.

[0060] Then, the binding rope 22 is passed through the through slot 21 on one side of the jacket 10 and passed under or around the conductor to be measured.

[0061] Next, pass the tie rope through the through slot on the other side.

[0062] Finally, by tightening the binding rope, the conductor under test is bound and restrained on the side away from the jacket opening to fix its position.

[0063] During operation, the binding rope applies a certain amount of pressure and friction to the conductor to fix the conductor in a specific position inside the jacket. When current passes through the conductor, a magnetic field is generated around it. Since the conductor position is fixed, the flexible Rogowski coil can stably sense the changes in this magnetic field and convert it into an electrical signal for measurement. The binding method and strength of the binding rope need to be appropriate to ensure that the conductor can be firmly fixed without causing excessive squeezing or damage to the conductor, so as not to affect the normal transmission of current and measurement accuracy.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible Rogowski coil, comprising an outer sleeve (1), a shielding layer (2), a flexible bone core (3), and a conductive core wire (4), wherein the outer sleeve (1), the shielding layer (2), the flexible bone core (3), and the conductive core wire (4) are fixed concentrically from outside to inside in sequence to form a circular ring, and one side of the circular ring is an opening; a winding coil (5) is wound around the flexible bone core (3), and the characteristics are: One end of the winding coil (5) is connected to the conductive core wire (4), and the other end of the winding coil (5) passes through the shielding layer (2) and the outer sleeve (1) to extend to the outside of the outer sleeve (1); insulating isolation layers (6) are respectively provided at both ends of the opening of the circular ring, one end of the conductive core wire (4) passes through the isolation layer (6), and the end of the conductive core wire (4) passing through is connected to a power spring (7); the other end of the winding coil (5) is connected to a plug connector (8).

2. A flexible Rogowski coil according to claim 1, characterized in that: The outer sleeve (1) is provided with a positioning connection column (9), and the positioning connection column (9) is extended along the radial direction of the ring.

3. The flexible Rogowski coil according to claim 1, characterized in that: The outer sleeve (1) is made of plastic.

4. The flexible Rogowski coil according to claim 1, characterized in that: The flexible bone core (3) is made of flexible insulating material.

5. The flexible Rogowski coil according to claim 2, characterized in that: The positioning connection pillars (9) are provided in plurality, and the plurality of positioning connection pillars (9) are arranged at intervals in the circumferential direction of the circular ring.

6. A flexible Rogowski coil current detection device, comprising a tubular jacket (10), one side of the jacket (10) being open, and clips (11) being respectively arranged on both sides of the opening of the jacket (10), characterized in that: It also includes the flexible Rogowski coil as claimed in claim 5, wherein the end surfaces of both ends of the jacket (10) are respectively provided with concave mounting grooves (12), the annular ring is installed in the mounting groove (12), and the clip (11) is provided with an integrator (13) corresponding to the annular ring; the other end of the winding coil (5) is plug-connected with one end of the integrator (13), a power connection sheet (14) corresponding to the power connection spring (7) is provided in the mounting groove (12), one end of the power connection sheet (14) is connected to the other end of the integrator (13), and the other end of the power connection sheet (14) is connected to the power connection spring (7). The clamp (11) is also provided with an analog-to-digital conversion module (15) connected to the integrator (13), the analog-to-digital conversion module (15) is connected to the central processing unit (16), and the central processing unit (16) is connected with a communication module (17); the side wall of the mounting groove (12) is provided with a positioning connection hole (18) corresponding to the positioning connection column (9), and the end of the jacket (10) is provided with an entry groove (19) for the positioning connection column (9) to enter the positioning connection hole (18), and the width of the entry groove (19) is smaller than the diameter of the positioning connection hole (18).

7. The flexible Rogowski coil current detection device according to claim 6, characterized in that: A switch (20) is provided between the other end of the winding coil (5) and the integrator (13).

8. The flexible Rogowski coil current detection device according to claim 6, characterized in that: The middle part of the jacket (10) is provided with a through groove (21) penetrating through both sides thereof, and also includes a binding rope (22) that can pass through the through groove (21).

9. The flexible Rogowski coil current detection device according to claim 6, characterized in that: The circular ring is adaptably connected to the mounting groove (12).

10. The flexible Rogowski coil current detection device according to claim 6, characterized in that: The jacket (10) is made of rubber material.

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