A lightning stroke counting sensor device based on double magnetic rings

Abstract

The utility model discloses a lightning stroke counting sensing device based on double magnetic ring relates to thunder and lightning monitoring and protection, include: discrimination magnetic ring loop, discrimination magnetic ring loop includes discrimination magnetic ring, resistance, first electric capacity, and the output of discrimination magnetic ring's secondary side is through resistance and parallel first electric capacity, and after with rectifier bridge's control coil connection, energy magnetic ring loop, energy magnetic ring loop includes energy magnetic ring, second electric capacity, and energy magnetic ring is parallel with discrimination magnetic ring, and the output of energy magnetic ring's secondary side is through second electric capacity, and one end is connected with the drive coil one end of electromagnetic counter, and the other end is connected with the drive coil the other end of electromagnetic counter through the always open contact of rectifier bridge. The utility model effectively solved the problem that current lightning stroke counting sensor is poor in anti -interference ability, and the sensitivity is not high, and the reliability is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of lightning monitoring and protection technology, and in particular to a lightning strike counting sensor based on a dual magnetic ring. Background Technology

[0002] Existing technologies are mainly divided into two categories: Perforated sensors: These typically consist of a single magnetic ring around which an induction coil is wound. Their advantages include no external power supply and a simple structure. However, they have significant disadvantages: low sensitivity, requiring a trigger current of approximately 8kA (8 / 20μs) to perform counting.

[0003] Rogowski flexible coils: These use an integrator combined with sensor sampling, and the data is processed by circuitry to drive the communication module. Their advantages include rich functionality, capable of recording time, current values, waveforms, etc. However, their disadvantages include high cost, relatively complex installation, and space requirements.

[0004] Therefore, a lightning strike counting sensor based on a dual magnetic ring was developed to solve the above problems. Utility Model Content

[0005] This invention proposes a lightning strike counting sensor based on dual magnetic rings to solve the problems of poor anti-interference ability, low sensitivity, and insufficient reliability of existing lightning strike counting sensors.

[0006] This utility model achieves the above objectives through the following technical solutions: This utility model discloses a lightning strike counting sensor based on a dual magnetic ring, comprising: The discrimination magnetic ring circuit includes a discrimination magnetic ring, a resistor, and a first capacitor. The secondary output of the discrimination magnetic ring is connected to the first capacitor in parallel with the resistor, and then connected to the control coil of the rectifier bridge. An energy magnetic ring circuit is provided, comprising an energy magnetic ring and a second capacitor. The energy magnetic ring is connected in parallel with a discrimination magnetic ring. The secondary output of the energy magnetic ring is connected to one end of the drive coil of an electromagnetic counter via the second capacitor, and the other end is connected to the other end of the drive coil of the electromagnetic counter via a normally open contact of a rectifier bridge.

[0007] Furthermore, the parallel structure of the discrimination magnetic ring and the energy magnetic ring is a structure obtained by winding two magnetic rings in parallel or by winding two magnetic rings separately and then connecting them in parallel.

[0008] Furthermore, the discriminant magnetic ring is a structure made of iron-silicon-aluminum material or manganese-zinc ferrite.

[0009] Furthermore, the energy magnetic ring is a structure made of iron-silicon-aluminum materials.

[0010] Furthermore, the electromagnetic counter is a mechanical electromagnetic counter or a lightning strike counter.

[0011] Furthermore, the number of turns of both the magnetic ring and the energy magnetic ring is determined to be 30 to 106, depending on the size of the magnetic ring.

[0012] Furthermore, the permeability of both the discriminant magnetic ring and the energy magnetic ring is 38–125 μ.

[0013] Furthermore, the total inductance of the discrimination magnetic ring and the energy magnetic ring after being connected in parallel is 120-160 UH, and the inductance of each individual magnetic ring after being connected in parallel is 240-320 UH.

[0014] Furthermore, it is determined that the inner diameter of the through hole for the lead wire to pass through in the parallel structure of the magnetic ring and the energy magnetic ring is ≥φ16mm.

[0015] Furthermore, it also includes a down conductor that passes through the center of the parallel structure of the discrimination magnetic ring and the energy magnetic ring.

[0016] The beneficial effects of this utility model are as follows: This invention proposes a lightning strike counting sensor based on dual magnetic rings. Through a discrimination magnetic ring and an energy magnetic ring, it effectively filters out most interference pulses, such as grid overvoltage and nearby small-current induced lightning, accurately identifying real lightning strikes. The core path from energy extraction to mechanical counting has no active electronic components, inheriting the absolute advantage of mechanical counters in resisting LEMP impacts. By adjusting the voltage divider resistor in the discrimination magnetic ring circuit, the current change rate threshold required for counting can be flexibly set to adapt to the sensitivity requirements of different regions and application scenarios. The energy is entirely extracted from the lightning current itself, requiring no external power supply; it has an extremely long lifespan, truly achieving maintenance-free operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lightning strike counting sensor based on dual magnetic rings according to this application.

[0018] In the diagram: T1 - discrimination magnetic ring; T2 - energy magnetic ring; L - lead wire; MOV - resistor; C1 - first capacitor; K1 - rectifier bridge; C2 - second capacitor; C - electromagnetic counter. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1 As shown, this utility model discloses a lightning strike counting sensor based on a dual magnetic ring, comprising: The discrimination magnetic ring circuit includes a discrimination magnetic ring, a resistor, and a first capacitor. The secondary output of the discrimination magnetic ring is connected to the first capacitor in parallel with the resistor, and then connected to the control coil of the rectifier bridge. An energy magnetic ring circuit is provided, comprising an energy magnetic ring and a second capacitor. The energy magnetic ring is connected in parallel with a discrimination magnetic ring. The secondary output of the energy magnetic ring is connected to one end of the drive coil of an electromagnetic counter via the second capacitor, and the other end is connected to the other end of the drive coil of the electromagnetic counter via a normally open contact of a rectifier bridge.

[0027] In one embodiment, the parallel structure of the discrimination magnetic ring and the energy magnetic ring is a structure obtained by winding two magnetic rings in parallel or by winding two magnetic rings separately and then connecting them in parallel.

[0028] In one embodiment, the discriminating magnetic ring is a structure made of iron-silicon-aluminum material or manganese-zinc ferrite.

[0029] In one embodiment, the energy magnetic ring is a structure made of iron-silicon-aluminum material.

[0030] In one embodiment, the electromagnetic counter is a mechanical electromagnetic counter or a lightning strike counter.

[0031] In one embodiment, the number of turns of both the discrimination magnetic ring and the energy magnetic ring is 30 to 106, determined according to the size of the magnetic ring.

[0032] In one embodiment, the permeability of both the discrimination magnetic ring and the energy magnetic ring is 38–125 μ.

[0033] In one embodiment, the total inductance of the discrimination magnetic ring and the energy magnetic ring after being connected in parallel is 120-160 UH, and the inductance of each individual magnetic ring after being connected in parallel is 240-320 UH.

[0034] In one embodiment, the inner diameter of the through hole through which the lead wire passes in the parallel structure of the identification magnetic ring and the energy magnetic ring is ≥φ16mm.

[0035] In one embodiment, a down conductor L is also included, which passes through the center of the parallel structure of the discrimination magnetic ring T1 and the energy magnetic ring T2.

[0036] The counting process of this utility model is as follows: S1: The lightning current flows through the down conductor L and passes through the center of the double magnetic ring; S2: The magnetic ring T1 senses a high di / dt, which induces an electromotive force in its secondary winding. S3: When the induced electromotive force exceeds the threshold (up to about 500A, 8 / 20μs), it drives the control coil of the magnetic latching relay to close its normally open contact. S4: Energy magnetic ring T2 simultaneously couples lightning current energy, generating a strong current pulse in its secondary winding; S5: This strong current pulse forms a path, driving the electromagnetic counter C to operate once and complete the counting; S6: The digit wheel of the electromagnetic counter C rotates, causing the magnet at its last position to be attracted, generating a driving switching voltage and a remotely identifiable switching signal at the same time. S7: After the lightning current passes, the magnetic latching relay of the electromagnetic counter C remains in the energized state until an external reset signal is received to reset it, preparing for the next counting cycle.

[0037] The working principle of this utility model is as follows: The lead-out line L passes through both the discrimination magnetic ring T1 and the energy magnetic ring T2. The secondary output of the discrimination magnetic ring T1, after being limited and filtered by a resistor MOV and a capacitor C1 in parallel, is connected to the control coil of the rectifier bridge DB107K1. The secondary output of the energy magnetic ring T2, after being filtered and filtered by a capacitor C2 to suppress interference, is connected at one end to one end of the drive coil of the upper-level unit circuit product, such as the mechanical electromagnetic counter C, and at the other end to the other end of the drive coil through the normally open contact of the rectifier bridge DB107K1, forming a loop.

[0038] When a lightning strike occurs, the voltage induced by T1 / T2 is rectified by K1, and the current pulse then flows through the coil of the electromagnetic counter C of the upper-level equipment, driving the electromagnet inside to engage and causing the digit wheel mechanism to count once.

[0039] The advantages of the lightning strike counting sensor based on a dual magnetic ring proposed in this invention compared to the prior art are as follows: Extremely strong anti-interference capability: This utility model adopts "AND gate" logic. The upper-level unit circuit product, such as the mechanical electromagnetic counter, will only operate when the "discrimination magnetic ring" detects enough di / dt events for discrimination and the "energy magnetic ring" is coupled to sufficient energy verification. This dual-condition mechanism can effectively filter out most interference pulses, such as grid operation overvoltage, nearby small current induced lightning, etc., and accurately identify real lightning strikes. High reliability: Full analog / mechanical energy path: The core path from energy harvesting to mechanical counting has no active electronic components, inheriting the absolute advantage of mechanical counters in resisting LEMP shocks; Threshold is flexible and adjustable: By adjusting the voltage divider resistor in the discrimination magnetic ring circuit, the threshold of the current change rate required for counting can be flexibly set to adapt to the sensitivity requirements of different regions and application scenarios. It combines local and remote monitoring: the mechanical dial provides intuitive and reliable local readings; the switch signal output enables remote and automated status monitoring, perfectly combining the advantages of mechanics and electronics; Self-powered and maintenance-free: The energy is entirely derived from the lightning current itself, requiring no external power supply; it has an extremely long lifespan, truly achieving maintenance-free operation.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A lightning strike counting sensor based on a dual magnetic ring, characterized in that, include: The discrimination magnetic ring circuit includes a discrimination magnetic ring, a resistor, and a first capacitor. The secondary output of the discrimination magnetic ring is connected to the first capacitor in parallel with the resistor, and then connected to the control coil of the rectifier bridge. An energy magnetic ring circuit is provided, comprising an energy magnetic ring and a second capacitor. The energy magnetic ring is connected in parallel with a discrimination magnetic ring. The secondary output of the energy magnetic ring is connected to one end of the drive coil of an electromagnetic counter via the second capacitor, and the other end is connected to the other end of the drive coil of the electromagnetic counter via a normally open contact of a rectifier bridge.

2. The lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The parallel structure of the discrimination magnetic ring and the energy magnetic ring is obtained by winding two magnetic rings in parallel or by winding two magnetic rings separately and then connecting them in parallel.

3. The lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The discrimination magnetic ring is a structure made of iron-silicon-aluminum material or manganese-zinc ferrite.

4. The lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The energy magnetic ring is a structure made of iron, silicon, and aluminum materials.

5. A lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The electromagnetic counter is either a mechanical electromagnetic counter or a lightning strike counter.

6. A lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The number of turns for both the magnetic ring and the energy magnetic ring is 30 to 106.

7. A lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The permeability of both the discriminant magnetic ring and the energy magnetic ring is 38–125 μ.

8. A lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The total inductance of the discrimination magnetic ring and the energy magnetic ring after being connected in parallel is 120-160 UH. The inductance of a single magnetic ring is 240-320 UH.

9. A lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, The diameter of the through hole for the lead wire to pass through in the parallel structure of the magnetic ring and the energy magnetic ring is ≥ φ16mm.

10. A lightning strike counting sensor based on a dual magnetic ring according to claim 1, characterized in that, It also includes a down conductor that passes through the center of the parallel structure of the discrimination magnetic ring and the energy magnetic ring.

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