CN214335075U

CN214335075U - High-voltage direct-current electric field sensing head

Info

Publication number: CN214335075U
Application number: CN202022096818.1U
Authority: CN
Inventors: 刘研; 毛凤麟
Original assignee: Xi'an Ancient River Electrical Engineering Co ltd
Current assignee: Xi'an Ancient River Electrical Engineering Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-10-01
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses a high voltage direct current electric field sensing head, including insulating box body, insulating box body's inside lower extreme is provided with probe mechanism, and insulating box body's inside upper end is provided with rotary mechanism, and probe mechanism includes bubble kerr sensor probe, and two single core optical cables of one end fixedly connected with of bubble kerr sensor probe, two through-holes have been seted up to one side of insulating box body, and insulating box body keeps away from a side surface of through-hole and has seted up logical groove, the beneficial effects of the utility model are that: the sensor directly extracts voltage signals on the electrodes for processing and is a voltage type sensor; the sensor transmits signals to the ground for processing through the optical cable with dozens of meters to hundreds of meters, and electronic equipment is not required to be configured on the high-voltage side, so that the size of the sensor is reduced, and the distortion generated to a measured electric field is also reduced; the electronic equipment of the sensor is arranged on the low-voltage side (ground), has no electromagnetic field interference problem on the high-voltage side, and is easy to carry out engineering treatment.

Description

High-voltage direct-current electric field sensing head

Technical Field

The utility model relates to a sensor technical field specifically is a high voltage direct current electric field sensing head.

Background

When space direct current electric field intensity is measured, the existing measuring mode is to utilize the change of current generated by the change of capacitance between electrodes to extract voltage drop signals of the current on a resistor for processing, the current type sensor belongs to a current type sensor, an electronic circuit and a power supply are required to be arranged on a high-voltage side of the current type sensor to process the signals, the volume of equipment is difficult to reduce, the measured electric field is distorted, the high-voltage side electronic equipment of the current type sensor is easy to be interfered by an electromagnetic field and an ion flow such as corona discharge, good electromagnetic field shielding measures are required to be taken, and otherwise, the application is difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high voltage direct current electric field sensing head to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the high-voltage direct-current electric field sensing head comprises an insulating box body, wherein a probe mechanism is arranged at the lower end of the inside of the insulating box body, and a rotating mechanism is arranged at the upper end of the inside of the insulating box body.

Preferably, probe mechanism includes bubble kel sensor probe, two single core optical cables of the one end fixedly connected with of bubble kel sensor probe, two through-holes have been seted up to one side of insulating box body, a side surface that the through-hole was kept away from to the insulating box body has seted up logical groove, a side fixed surface of single core optical cable is kept away from to bubble kel sensor probe is connected with first electrode, the external fixed surface of first electrode is connected with the brush, the one end fixed surface that bubble kel sensor probe is close to first electrode is connected with the second electrode, the solid fixed ring of one end fixed surface of second electrode is connected with, gu fixed ring's last fixed surface is connected with the fixed polar plate.

Preferably, rotary mechanism includes miniature direct current motor, miniature direct current motor fixed connection is in the inside of insulating box body, miniature direct current motor's output fixedly connected with insulating axle, the electrically conductive axle of one end fixedly connected with that miniature direct current motor was kept away from to insulating axle, insulating box body is close to a side surface that leads to the groove and has seted up the circular slot, the inside fixed grafting of circular slot has the bearing, the electrically conductive axle is kept away from the one end fixedly connected with bull stick of insulating axle, the one end fixedly connected with rotating polar plate of bull stick.

Preferably, the single-core optical cable is inserted into the corresponding through hole.

Preferably, the second electrode is inserted into the through groove.

Preferably, the brush is disposed in contact with the conductive shaft.

Preferably, the conductive shaft is rotatably connected with a bearing.

Compared with the prior art, the beneficial effects of the utility model are that: the sensor directly extracts voltage signals on the electrodes for processing and is a voltage type sensor; the sensor transmits signals to the ground for processing through the optical cable with dozens of meters to hundreds of meters, and electronic equipment is not required to be configured on the high-voltage side, so that the size of the sensor is reduced, and the distortion generated to a measured electric field is also reduced; the electronic equipment of the sensor is arranged on the low-voltage side (ground), has no electromagnetic field interference problem on the high-voltage side, and is easy to carry out engineering treatment.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a side view of the structure of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

in the figure: 1. an insulating case; 2. a probe mechanism; 21. a pockel sensor probe; 22. a through hole; 23. A single core optical cable; 24. a first electrode; 25. a second electrode; 26. a through groove; 27. a fixing ring; 28. fixing the polar plate; 29. an electric brush; 3. a rotation mechanism; 31. a micro DC motor; 32. an insulating shaft; 33. a conductive shaft; 34. a circular groove; 35. a bearing; 36. a rotating rod; 37. the pole plate is rotated.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a high voltage direct current electric field sensing head, includes insulating box body 1, and the inside lower extreme of insulating box body 1 is provided with probe mechanism 2, and the inside upper end of insulating box body 1 is provided with rotary mechanism 3.

Probe mechanism 2 includes bubble kel sensor probe 21, two single core optical cables 23 of the one end fixedly connected with of bubble kel sensor probe 21, two through-holes 22 have been seted up to one side of insulating box body 1, insulating box body 1 keeps away from a side surface of through-hole 22 and has seted up logical groove 26, one side fixed surface that single core optical cable 23 was kept away from to bubble kel sensor probe 21 is connected with first electrode 24, first electrode 24's external fixed surface is connected with brush 29, the one end fixed surface that bubble kel sensor probe 21 is close to first electrode 24 is connected with second electrode 25, the one end external fixed surface of second electrode 25 is connected with solid fixed ring 27, gu fixed ring 27's last fixed surface is connected with fixed polar plate 28, probe mechanism 2 is used for measuring voltage amplitude.

The rotating mechanism 3 comprises a micro direct current motor 31, the micro direct current motor 31 is fixedly connected inside the insulating box body 1, an insulating shaft 32 is fixedly connected to an output end of the micro direct current motor 31, a conductive shaft 33 is fixedly connected to one end, far away from the micro direct current motor 31, of the insulating shaft 32, a circular groove 34 is formed in one side surface, close to the through groove 26, of the insulating box body 1, a bearing 35 is fixedly inserted inside the circular groove 34, a rotating rod 36 is fixedly connected to one end, far away from the insulating shaft 32, of the conductive shaft 33, a rotating polar plate 37 is fixedly connected to one end of the rotating rod 36, and the rotating mechanism 3 transmits a voltage signal to the Pockel sensor probe 21 by changing the position between the rotating polar plate 37 and the fixed polar plate 28.

The single-core optical cable 23 is inserted into the corresponding through hole 22, so that signals can be output conveniently.

The second electrode 25 is inserted into the through groove 26, so as to be connected with the fixed pole plate 28.

The brush 29 is disposed in contact with the conductive shaft 33 to receive a signal value of the rotating pole plate 37.

The conductive shaft 33 is rotatably connected to a bearing 35 to facilitate rotation of the conductive shaft 33.

Specifically, use the utility model discloses the time, place insulating box body 1 in the electric field, miniature DC motor 31 drives insulating axle 32 and rotates, and insulating axle 32 drives conducting shaft 33 and rotates, and conducting shaft 33 drives rotating polar plate 37 and is the circular motion of radius for R.

When the rotating polar plate 37 is located at the highest position, the distance between the rotating polar plate 37 and the fixed polar plate 28 is (2R + h); the potential difference between the two polar plates is (2R + h) E;

when the rotating pole plate 37 is located at the lowest position, the distance between the rotating pole plate 37 and the fixed pole plate 28 is h; the potential difference between the two polar plates is hE;

the central distance between two polar plates is changed according to the rule of (h + R + Rsin ω t), ω is 2 π f, f is the rotation frequency of the rotating polar plate 37, the alternating potential difference between two polar plates is REsin ω t, which is equivalent to that an AC signal voltage of REsin ω t is inputted to the Pockel sensor probe 21, so that the DC electric field signal is modulated into an AC electric field signal by the rotating polar plate 37, the signal amplitude is proportional to the rotation radius R, and proportional to the field intensity E.

The rotating polar plate 37 of the Pockel DC sensor is driven by a phi 5 micro motor and is supplied with power by a 1.5V battery for steady flow. The optical cable adopts a double-core single-mode optical fiber, and the length of the optical cable is dozens of meters to hundreds of meters and can be changed according to actual application. A laser tube (LD) for a light source on the emission side, and a photoelectric tube (PD) for photoelectric conversion on the reception side.

After the signal is amplified by a low-noise discharger, the direct current component and the alternating current component are separated and respectively amplified. In order to prevent interference of 50Hz and higher harmonics which may be contained in the DC voltage of the HVDC line, which is supplied by the converter station, a specially made low-pass filter is used in the circuit. Then the signal is sent to CPU single chip for further processing, and finally the output result is the tested space DC field intensity value (V/cm).

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The high-voltage direct-current electric field sensing head comprises an insulating box body (1) and is characterized in that a probe mechanism (2) is arranged at the lower end of the inside of the insulating box body (1), and a rotating mechanism (3) is arranged at the upper end of the inside of the insulating box body (1).

2. The high voltage direct current electric field sensing head of claim 1, wherein: the probe mechanism (2) comprises a bubble Kerr sensor probe (21), one end of the bubble Kerr sensor probe (21) is fixedly connected with two single-core optical cables (23), two through holes (22) are arranged on one side of the insulating box body (1), a through groove (26) is arranged on the surface of one side of the insulating box body (1) far away from the through holes (22), the surface of one side of the bubble Kerr sensor probe (21) far away from the single-core optical cable (23) is fixedly connected with a first electrode (24), the outer surface of the first electrode (24) is fixedly connected with an electric brush (29), the surface of one end of the bubble Kerr sensor probe (21) close to the first electrode (24) is fixedly connected with a second electrode (25), the outer surface of one end of the second electrode (25) is fixedly connected with a fixed ring (27), the upper surface of the fixing ring (27) is fixedly connected with a fixing pole plate (28).

3. The high voltage direct current electric field sensing head of claim 1, wherein: rotary mechanism (3) include miniature direct current motor (31), miniature direct current motor (31) fixed connection is in the inside of insulating box body (1), the insulating axle of output fixedly connected with (32) of miniature direct current motor (31), the electrically conductive axle of one end fixedly connected with (33) of miniature direct current motor (31) is kept away from in insulating axle (32), insulating box body (1) is close to one side surface that leads to groove (26) and has seted up circular slot (34), the inside fixed grafting of circular slot (34) has bearing (35), the one end fixedly connected with bull stick (36) of insulating axle (32) is kept away from in electrically conductive axle (33), the one end fixedly connected with rotating polar plate (37) of bull stick (36).

4. The high voltage direct current electric field sensing head of claim 2, wherein: the single-core optical cable (23) is inserted into the corresponding through hole (22).

5. The high voltage direct current electric field sensing head of claim 2, wherein: the second electrode (25) is inserted into the through groove (26).

6. The high voltage direct current electric field sensing head of claim 2, wherein: the brush (29) is arranged in contact with the conductive shaft (33).

7. A high voltage direct current electric field sensing head according to claim 3, wherein: the conductive shaft (33) is rotatably connected with the bearing (35).