A two-stage induction structure series suspended field grinding probe

Abstract

The present invention relates to a two-stage inductive structure series-connected suspended field mill probe, comprising a first-stage inductive structure, a second-stage inductive structure, a reduction gearbox, and a motor; a first conductive slip ring is connected and arranged in the cavity of the first-stage inductive structure; a second-stage inductive structure is arranged below the first-stage inductive structure and connected to the first conductive slip ring, and a second conductive slip ring is connected and arranged in the cavity of the second-stage inductive structure; a reduction gearbox is arranged between the first-stage inductive structure and the second-stage inductive structure, one end of the reduction gearbox is connected to the first conductive slip ring and the other end is connected to the second-stage inductive structure, and the reduction gearbox is located in the cavity of the first-stage inductive structure; a motor is arranged below the cavity of the second-stage inductive structure and connected to the second conductive slip ring. The present invention achieves accurate measurement of spatial DC composite electric field strength by using a motor and a gearbox to drive the two-stage inductive structure arranged in series to perform differential rotation, and greatly reduces the overall size of the suspended field mill probe, making it easy to carry.

Description

Technical Field

[0001] The invention relates to the technical field of electric field measurement, in particular to a two-stage induction structure series-connected suspended field milling probe. Background Art

[0002] Suspended field mill probes are commonly used to measure the combined electric field strength beneath DC transmission lines. Compared to traditional gate-type field mill probes, they effectively eliminate the cumulative effect of free charge in space. Traditional suspended field mill probes use two motors to drive two sensing structures, each rotating at a differential speed. However, these designs result in large overall dimensions, making them difficult to carry. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a two-stage induction structure series suspension field milling probe, comprising:

[0004] The first-stage induction structure has a first conductive slip ring connected to the cavity thereof;

[0005] A second-stage inductive structure is provided below the first-stage inductive structure and connected to the first conductive slip ring, wherein a second conductive slip ring is connected and provided in the cavity of the second-stage inductive structure;

[0006] a reduction gearbox, which is arranged between the first-stage induction structure and the second-stage induction structure, one end of the reduction gearbox is connected to the first conductive slip ring, and the other end is connected to the second-stage induction structure, and the reduction gearbox is located in the cavity of the first-stage induction structure;

[0007] The motor is arranged below the cavity of the second-stage inductive structure and connected to the second conductive slip ring.

[0008] Preferably, a first connecting shaft is further provided in the cavity of the first-stage inductive structure; the first conductive slip ring is provided in series on the first connecting shaft; one end of the first connecting shaft is connected to the top wall of the first-stage inductive structure, and the other end is connected to the reduction gearbox.

[0009] Preferably, the reduction gearbox further includes a reduction shaft, which is a hollow cylindrical structure and has two ends, one end of which is the end of the reduction shaft and the other end is the head end of the reduction shaft; the reduction gearbox provides power for the rotation of the first-stage induction structure and the first conductive slip ring, and the reduction gearbox drives the first-stage induction structure to rotate at a first speed ω1 through the end of the reduction shaft, and the head end of the reduction shaft is coaxially connected to the second-stage induction structure and the motor.

[0010] Preferably, a second connecting shaft is further provided in the cavity of the second-stage inductive structure; one end of the second connecting shaft is connected to the center of the top wall of the second-stage inductive structure, and the other end is connected to the motor; the second conductive slip ring is connected in series to the second connecting shaft.

[0011] Preferably, the motor also includes a motor shaft, which is a hollow cylindrical structure. The motor shaft has two ends, the shaft end away from the motor is called the motor shaft end, and the shaft end connected to the motor body is called the motor shaft head end. The motor is used to provide power for the rotation of the second-stage induction structure, the second conductive slip ring and the reduction gearbox. The motor can drive the second-stage induction structure to rotate at a second speed ω2.

[0012] Preferably, a distance is preset between the first-level sensing structure and the second-level sensing structure.

[0013] Preferably, the first-stage sensing structure and the second-stage sensing structure are made of non-polar insulating materials such as polytetrafluoroethylene.

[0014] Preferably, the first-stage sensing structure and the second-stage sensing structure are cylindrical semi-enclosed cavity structures, and the first-stage sensing structure and the second-stage sensing structure have the same size.

[0015] Preferably, the first-level sensing structure and the second-level sensing structure include side walls and top walls, and outer surfaces of the side walls of both are coated with a conductive alloy layer of a preset thickness.

[0016] Preferably, the head end of the reduction shaft of the reduction gearbox is coaxially fixedly connected to the second connecting shaft and the end of the motor shaft through a fixing agent, the first conductive slip ring is coaxially fixedly installed on the end of the reduction shaft, one end of the wire on the first conductive slip ring is electrically connected to the first-stage induction structure, and the other end is led out to the vicinity of the motor through the hollow reduction gearbox shaft and the motor shaft.

[0017] The present invention relates to a two-stage inductive structure series-type suspended field mill probe. The present invention relates to a two-stage inductive structure series-type suspended field mill probe, comprising a first-stage inductive structure, a second-stage inductive structure, a reduction gearbox, and a motor; a first conductive slip ring is connected and arranged in the cavity of the first-stage inductive structure; the second-stage inductive structure is arranged below the first-stage inductive structure and connected to the first conductive slip ring, and a second conductive slip ring is connected and arranged in the cavity of the second-stage inductive structure; a reduction gearbox is arranged between the first-stage inductive structure and the second-stage inductive structure, one end of the reduction gearbox is connected to the first conductive slip ring and the other end is connected to the second-stage inductive structure, and the reduction gearbox is located in the cavity of the first-stage inductive structure; the motor is arranged below the cavity of the second-stage inductive structure and connected to the second conductive slip ring. The present invention achieves accurate measurement of spatial DC composite electric field strength by using a motor and a gearbox to drive the two-stage inductive structure arranged in series to perform differential rotation. In addition, the overall size of the suspended field mill probe is greatly reduced, making it more convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features, and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings. The accompanying drawings are only for the purpose of illustrating preferred embodiments and are not to be construed as limiting the present invention. The same reference numerals are used throughout the drawings to represent the same components.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure and electrical connections of the present invention;

[0021] In the figure, 1, first-stage induction structure, 2, first conductive slip ring, 3, reduction gearbox, 4, second-stage induction structure, 5, second conductive slip ring, 6, motor;

[0022] 11. First connecting shaft, 31. Starting end of reduction shaft, 32. End of reduction shaft, 41. Second connecting shaft, 61. Motor shaft. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is a conflict.

[0024] Reference Figure 1-2As shown, a two-stage induction structure series-type suspended field grinding probe disclosed in the present invention includes a first-stage induction structure 1, a second-stage induction structure 4, a reduction gearbox 3 and a motor 6; a first conductive slip ring 2 is connected and arranged in the cavity of the first-stage induction structure 1; the second-stage induction structure 4 is arranged below the first-stage induction structure 1 and connected to the first conductive slip ring 2, and a second conductive slip ring 5 is connected and arranged in the cavity of the second-stage induction structure 4; the reduction gearbox 3 is arranged between the first-stage induction structure 1 and the second-stage induction structure 4, one end of the reduction gearbox 3 is connected to the first conductive slip ring 2, and the other end is connected to the second-stage induction structure 4, and the reduction gearbox 3 is located in the cavity of the first-stage induction structure 1; the motor 6 is arranged below the cavity of the second-stage induction structure 4 and connected to the second conductive slip ring 5. It should be understood that the first and second conductive slip rings 2 and 5 consist of a stator and a rotor, wherein the rotor is coaxially fixedly connected to the reduction gear shaft of the reduction gearbox 3 or the motor shaft of the motor 6, so that the rotor of the first conductive slip ring 2 and the reduction gear shaft of the reduction gearbox 3 rotate at the same speed, and the rotor of the second conductive slip ring 5 and the motor shaft of the motor 6 rotate at the same speed, respectively. These structures are used to conduct the induced current generated by the rotation of the first-stage inductive structure 1 and the second-stage inductive structure 4 to the hardware circuit structure. This embodiment utilizes a motor 6 and a gearbox to drive the differential rotation of the two-stage inductive structures arranged in series, achieving accurate measurement of the spatial DC composite electric field strength. This significantly reduces the overall size of the suspended field mill probe, making it more portable. In this embodiment, the first-stage inductive structure 1 and the second-stage inductive structure 5 are made of non-polar insulating materials such as polytetrafluoroethylene to prevent free charges from entering the interior of the suspended field mill probe, thereby preventing damage to the device.

[0025] Reference Figure 1-2 As shown, a first connecting shaft 11 is further provided in the cavity of the first-stage inductive structure 1; the first conductive slip ring 2 is arranged in series on the first connecting shaft 11; one end of the first connecting shaft 11 is connected to the top wall of the first-stage inductive structure 1, and the other end is connected to the reduction box 3.

[0026] Reference Figure 1-2 As shown, the reduction gearbox 3 also includes a reduction shaft, which is a hollow cylindrical structure with two ends: one end is a reduction shaft terminal 32, and the other end is a reduction shaft head end 31. The reduction gearbox 3 provides power for the rotation of the first-stage inductive structure 1 and the first conductive slip ring 2. The reduction gearbox 3 drives the first-stage inductive structure 1 to rotate at a first speed ω1 via the reduction shaft terminal 32. The reduction shaft head end 31 is coaxially connected to the second-stage inductive structure 4 and the motor. It should be understood that because the reduction shaft terminal 32 and the reduction shaft head end 31 of the reduction gearbox rotate at different speeds, the technical effect of achieving different speeds for the two inductive structures using the same motor is achieved.

[0027] Reference Figure 1-2 As shown, a second connecting shaft 41 is further provided in the cavity of the second-stage inductive structure 4; one end of the second connecting shaft 41 is connected to the top center of the second-stage inductive structure 4, and the other end is connected to the motor 6; the second conductive slip ring 5 is connected in series to the second connecting shaft 41.

[0028] Reference Figure 1-2 As shown, the motor 6 also includes a motor shaft 61, which is a hollow cylindrical structure. The motor shaft 61 has two ends, the end away from the motor 6 is called the motor shaft end, and the end connected to the motor 6 is called the motor shaft head end. The motor 6 is used to provide power for the rotation of the second-stage inductive structure 4, the second conductive slip ring 5 and the reduction gearbox 3. The motor 6 can drive the second-stage inductive structure 4 to rotate at a second speed ω2. It should be understood that since the electric field below the DC transmission line includes both a DC synthetic electric field related to the frequency and a spatial ion current field that is independent of the frequency, when the two inductive structures rotate differentially at speeds of ω1 and ω2, two induced currents with different frequencies can be generated. Then, by performing IV conversion and difference calculation on these two induced currents, the spatial ion current field component that is independent of the frequency can be eliminated, and the DC synthetic electric field that is related to the frequency can be calculated.

[0029] Reference Figure 1-2 As shown, a preset spacing distance is set between the first-stage sensing structure 1 and the second-stage sensing structure 5. In this embodiment, a preset spacing distance of about 1 mm is set between the second-stage sensing structure 5 and the first-stage sensing structure 1 to prevent damage to the suspension field grinding probe caused by friction between the two sensing structures.

[0030] Reference Figure 1-2 As shown, the first-stage sensing structure 1 and the second-stage sensing structure 4 are cylindrical semi-enclosed cavity structures, and the first-stage sensing structure 1 and the second-stage sensing structure 4 have the same size. It should be understood that the first-stage sensing structure 1 and the second-stage sensing structure 4 are cylindrical semi-enclosed cavity structures made of non-polar insulating materials such as polytetrafluoroethylene, which are used to block free space charges from entering the interior of the suspended field milling probe to prevent damage to the device.

[0031] Reference Figure 1-2 As shown, the first-level sensing structure 1 and the second-level sensing structure 4 include side walls and top walls, and the outer surfaces of the side walls of both are coated with a conductive alloy layer of a preset thickness for sensing space charge. In this embodiment, the side walls and top walls of the first-level sensing structure 1 and the second-level sensing structure 4 are both 2 mm thick. In this embodiment, the outer surfaces of the side walls of the first-level sensing structure 1 and the second-level sensing structure 4 are both coated with a conductive alloy layer of a preset thickness.

[0032] Reference Figure 1-2As shown, the first end 31 of the reduction shaft of the reduction box 3 is coaxially fixedly connected with the second connecting shaft 41 and the end of the motor shaft through a fixing agent, and the first conductive slip ring 2 is coaxially fixedly installed on the end 31 of the reduction shaft. One end of the wire on the first conductive slip ring 2 is electrically connected to the first-stage induction structure 1, and the other end is led out to the vicinity of the motor through the hollow reduction box shaft and the motor shaft 61.

[0033] The present invention discloses a two-stage induction structure series-connected suspended field mill probe. The present invention relates to a two-stage induction structure series-connected suspended field mill probe, comprising a first-stage induction structure, a second-stage induction structure, a reduction gearbox, and a motor; a first conductive slip ring is connected and arranged in the cavity of the first-stage induction structure; the second-stage induction structure is arranged below the first-stage induction structure and connected to the first conductive slip ring, and a second conductive slip ring is connected and arranged in the cavity of the second-stage induction structure; a reduction gearbox is arranged between the first-stage induction structure and the second-stage induction structure, one end of the reduction gearbox is connected to the first conductive slip ring and the other end is connected to the second-stage induction structure, and the reduction gearbox is located in the cavity of the first-stage induction structure; the motor is arranged below the cavity of the second-stage induction structure and connected to the second conductive slip ring. The present invention uses a motor and a gearbox to drive the two-stage induction structures arranged in series to perform differential rotation, thereby achieving accurate measurement of the spatial DC synthetic electric field strength. In addition, the overall size of the suspended field mill probe is greatly reduced, making it more convenient to carry.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0035] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A two-stage induction structure series type suspended field mill probe, characterized in that: include: The first-stage induction structure has a first conductive slip ring connected to the cavity thereof; A second-stage inductive structure is provided below the first-stage inductive structure and connected to the first conductive slip ring, wherein a second conductive slip ring is connected and provided in the cavity of the second-stage inductive structure; A reduction gearbox is provided between the first-stage induction structure and the second-stage induction structure. One end of the reduction gearbox is connected to the first conductive slip ring, and the other end is connected to the second-stage induction structure, and the reduction gearbox is located in the cavity of the first-stage induction structure; The motor is arranged below the second-stage inductive structure cavity and is connected to the second conductive Slip ring connection.

2. The two-stage induction structure series type suspended field mill probe according to claim 1, characterized in that: A first connecting shaft is further provided in the cavity of the first-stage inductive structure; the first conductive slip ring is serially provided on the first connecting shaft; one end of the first connecting shaft is connected to the top wall of the first-stage inductive structure, and the other end is connected to the reduction gearbox.

3. The two-stage induction structure series type suspended field mill probe according to claim 2, characterized in that: The reduction gearbox also includes a reduction shaft, which is a hollow cylindrical structure and has two ends, one end of which is the end of the reduction shaft and the other end is the head end of the reduction shaft; the reduction gearbox provides power for the rotation of the first-stage induction structure and the first conductive slip ring, and the reduction gearbox drives the first-stage induction structure to rotate at a first speed ω1 through the end of the reduction shaft, and the head end of the reduction shaft is coaxially connected to the second-stage induction structure and the motor.

4. The two-stage induction structure series type suspended field mill probe according to claim 3, characterized in that: A second connecting shaft is further provided in the cavity of the second-stage inductive structure; one end of the second connecting shaft is connected to the center of the top wall of the second-stage inductive structure, and the other end is connected to the motor; the second conductive slip ring is connected in series to the second connecting shaft.

5. The two-stage induction structure series type suspended field mill probe according to claim 4, characterized in that: The motor also includes a motor shaft, which is a hollow cylindrical structure. The motor shaft has two ends, the shaft end away from the motor is called the motor shaft end, and the shaft end connected to the motor body is called the motor shaft head end. The motor is used to provide power for the rotation of the second-stage induction structure, the second conductive slip ring and the reduction gearbox. The motor can drive the second-stage induction structure to rotate at a second speed ω2.

6. The two-stage induction structure series suspension field mill probe according to any one of claims 1 to 5, characterized in that: A predetermined spacing distance is provided between the first-stage sensing structure and the second-stage sensing structure.

7. The two-stage induction structure series type suspended field mill probe according to claim 6, characterized in that: The first-stage inductive structure and the second-stage inductive structure are made of non-polar insulating materials such as polytetrafluoroethylene.

8. The two-stage induction structure series type suspended field mill probe according to claim 6, characterized in that: The first-stage sensing structure and the second-stage sensing structure are cylindrical semi-enclosed cavity structures, and the first-stage sensing structure and the second-stage sensing structure have the same size.

9. The two-stage induction structure series type suspended field mill probe according to claim 6, characterized in that: The first-level sensing structure and the second-level sensing structure include side walls and top walls, and the outer surfaces of the side walls of both are coated with a conductive alloy layer with a preset thickness.

10. The two-stage induction structure series type suspended field mill probe according to claim 5, characterized in that: The first end of the reduction shaft of the reduction gearbox is coaxially fixedly connected to the second connecting shaft and the end of the motor shaft through a fixing agent. The first conductive slip ring is coaxially fixedly installed on the end of the reduction shaft. One end of the wire on the first conductive slip ring is electrically connected to the first-stage induction structure, and the other end is led out to the vicinity of the motor through the hollow reduction gearbox shaft and the motor shaft.

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