Corona discharge observation recorder

Abstract

The utility model discloses a corona discharge observation recorder which comprises a camera and a lens mount which are connected with each other, an image sensor is arranged in the camera, and an ultraviolet image intensifier, a first lens assembly, a first solar blind optical filter and a low-transmittance optical filter are movably arranged on the lens mount. Wherein the first solar blind optical filter and the low-transmittance optical filter are located in front of the ultraviolet image intensifier and the first lens assembly. The corona discharge observation recorder provided by the utility model has the advantages of simple structure, no need of light splitting, no energy loss problem caused by light splitting, and clear formed images.

Description

Technical Field

[0001] The utility model relates to the field of corona discharge recording, in particular to a corona discharge observation recorder. Background Art

[0002] Corona discharge refers to the local self-sustaining discharge of a gas medium in an inhomogeneous electric field. It is the most common form of gas discharge. If the discharge lasts for a long time, it will affect the safety of the high-voltage power transmission and transformation system. Therefore, it is necessary to promptly identify the location of the corona discharge and repair it.

[0003] Corona discharge emits ultraviolet light, so it can be determined by detecting whether there is ultraviolet light in the power system. The principle of the current corona discharge recorder is as follows: let the incident light pass through the beam splitter and be divided into visible light and ultraviolet light, where the visible light passes through the visible light camera module, and the ultraviolet light passes through the filter, the full-day blind ultraviolet imaging module and the CCD detector in turn, and finally the two are synthesized by a software fusion module through a special image processing algorithm. The structure is complex and needs to be split first, which consumes half of the energy of the ultraviolet light. In addition, the visible light and ultraviolet light use two parallel channels, and an industrial camera is used as the recording body, resulting in low clarity and sensitivity of the final synthesized image. Utility Model Content

[0004] The utility model aims to provide a corona discharge observation and recording instrument, which has a simple structure, does not require light splitting, has no energy loss problem caused by light splitting, and forms clear images.

[0005] To achieve the above-mentioned purpose, the utility model provides a corona discharge observation and recording instrument, comprising a connected camera and a lens mount, wherein an image sensor is arranged in the camera, and an ultraviolet image intensifier, a first lens assembly, a first day-blind filter and a low-transmittance filter are movably arranged on the lens mount, wherein the first day-blind filter and the low-transmittance filter are located in front of the ultraviolet image intensifier and the first lens assembly.

[0006] As a further improvement of the utility model, an ultraviolet lens is provided at the front end of the lens holder, and the ultraviolet lens, the first bracket and the second bracket are arranged in sequence.

[0007] As a further improvement of the present invention, a second lens assembly is further provided in the first channel, and the second lens assembly is located behind the ultraviolet image intensifier.

[0008] As a further improvement of the present invention, an empty frame is further provided on the first bracket, and the first day-blind filter, the low-transmittance filter and the empty frame are arranged in parallel.

[0009] As a further improvement of the present invention, a first sliding groove and a second sliding groove are provided on the lens mount, the first bracket is slidably connected to the first sliding groove, and the second bracket is slidably connected to the second sliding groove.

[0010] As a further improvement of the present invention, the first day-blind filter, the low-transmittance filter and the empty frame are arranged in a straight line on the first bracket.

[0011] As a further improvement of the utility model, a third slide groove is provided on the lens mount, and a third bracket is slidably connected to the third slide groove; the third bracket, the first bracket and the second bracket are arranged in sequence; the third bracket is provided with at least two filter installation positions arranged in parallel.

[0012] Beneficial Effects

[0013] Compared with the prior art, the advantages of the corona discharge observation and recording instrument of the utility model are:

[0014] 1. The recorder is provided with a first bracket and a second bracket movably connected on a lens frame, and different filters on the first bracket are matched with the first lens assembly or the ultraviolet image intensifier on the second bracket in different combinations. At the same time, the exposure function of the camera itself is utilized to obtain a fused picture including both the environmental image and the ultraviolet corona image without the need for light splitting. The structure is simple, and it is conducive to finding the exact position where the corona discharge occurs.

[0015] 2. The recorder does not require splitting, so there is no problem of half the energy loss of ultraviolet light due to splitting. In addition, most of the current ultraviolet imagers use industrial camera technology, and the sensitivity of industrial cameras generally does not exceed ISO6400. This technology uses a digital camera with a video recording function. The micro-single camera can reach ISO204800 after the sensitivity is expanded, and the sensitivity can be increased by more than ten times. Most of the energy of ultraviolet light generated by corona discharge is concentrated in long-wave ultraviolet light. When recording corona discharge at night without visible light, there is no need to add a filter in front of the ultraviolet image intensifier, and the sensitivity can be increased by more than double.

[0016] 3. The image of the recorder is clear. Industrial cameras only have millions of pixels, while the image sensors used in this technology are at least 20 million.

[0017] 4. A color environment image or a black-and-white environment image can be obtained by combining the above components as needed, and has a wide range of applicability.

[0018] 5. An ultraviolet lens is provided at the front end of the lens mount to improve the color reproduction in color environment images.

[0019] 6. The first bracket is slidably connected to the first slide groove, and the second bracket is slidably connected to the second slide groove, with a simple structure and convenient switching operation.

[0020] 7. By setting up a third bracket and using the filter on the third bracket, the purpose of the recorder can be expanded, so that the recorder can not only record corona discharge phenomena, but also be used in the fields of sewage detection and recording, thus overcoming the problem that sewage detection can only detect sewage phenomena but cannot prove the actual scene of the specific sewage environment, and it plays an obvious role as evidence in forensic science.

[0021] 8. The recorder only uses one image sensor and does not require complex software image fusion technology. The equipment cost is low, which is conducive to promotion and application.

[0022] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is one of the state diagrams of the corona discharge observation and recording instrument of Example 1;

[0025] Figure 2 The second state diagram of the corona discharge observation and recording instrument of Example 1;

[0026] Figure 3 The third state diagram of the corona discharge observation and recording instrument of Example 1;

[0027] Figure 4 is a cross-sectional view of the first bracket of Example 1;

[0028] Figure 5 is a cross-sectional view of the second bracket of Example 1;

[0029] Figure 6 The fourth state diagram of the corona discharge observation and recording instrument of Example 1;

[0030] Figure 7 The fifth state diagram of the corona discharge observation and recording instrument of Example 1;

[0031] Figure 8 The clamping structure of embodiment 1;

[0032] Fig. 9 is a cross-sectional view of the corona discharge observation and recording instrument of Example 2;

[0033] Fig.10This is a schematic diagram of the driving device of the bracket in Example 3. DETAILED DESCRIPTION

[0034] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0035] Example 1

[0036] The specific implementation of the utility model is as follows Figures 1 to 8 As shown, a corona discharge observation and recording instrument comprises a connected camera 1 and a lens holder 2, wherein an image sensor 11 is provided in the camera 1, and a first bracket 3 and a second bracket 5 are movably connected to the lens holder 2, and the first bracket 3, the second bracket 5 and the image sensor 11 are arranged in sequence along the incident direction of light. The first bracket 3 is provided with a first solar blind filter 31 and a low-transmittance filter 32 arranged in parallel. The second bracket 5 is provided with a first channel 51 and a second channel 52 arranged in parallel, wherein an ultraviolet image intensifier 6 is provided in the first channel 51, and a first lens assembly 8 is provided in the second channel 52. In this embodiment, the first solar blind filter 31 is a solar blind filter that passes a wavelength of 275nm; the low-transmittance filter 32 can pass visible light such as long-wave ultraviolet rays or short-wave visible light.

[0037] The inlet window plane of the ultraviolet image intensifier 6 is used as the image plane, and the first lens assembly 8 is located between the image plane and the image sensor 11. The first lens assembly 8 can be a single lens or can be composed of at least two lenses arranged in sequence.

[0038] An ultraviolet lens 4 is disposed at the front end of the lens holder 2, and the ultraviolet lens 4, the first bracket 3, and the second bracket 5 are arranged in sequence.

[0039] A second lens assembly 7 is also disposed in the first channel 51, and the second lens assembly 7 is located behind the ultraviolet image intensifier 6. The second lens assembly may be a single lens, or may be composed of at least two lenses arranged in sequence.

[0040] An empty frame 33 is also provided on the first bracket 3, and the first day-blind filter 31, the low-transmittance filter 32 and the empty frame 33 are arranged in parallel.

[0041] The lens holder 2 is provided with a first slide groove 21 and a second slide groove 22 , the first bracket 3 is slidably connected to the first slide groove 21 , and the second bracket 5 is slidably connected to the second slide groove 22 .

[0042] The first day-blind filter 31 , the low-transmittance filter 32 , and the empty frame 33 are arranged on the first bracket 3 along a straight line.

[0043] When the bracket slides along the slide groove, in order to ensure that the corresponding optical components are located in the same straight line after the movement, a clamping structure is set between the side wall of the first slide groove 21 and the first bracket 3, and between the second slide groove 22 and the second bracket 5. The clamping structure includes a protruding clamping block 91 and a positioning groove 92, wherein the positioning groove 92 is set on the first bracket 3 and the second bracket 5, and the clamping block 91 is set on the side walls of the first slide groove 21 and the second slide groove 22. Taking the first bracket 3 as an example, after the personnel pushes the first bracket 3 by hand or electrically to make it slide along the first slide groove 21 for a distance, the clamping block 91 is clamped and matched with the corresponding positioning groove 92, and the corresponding filter, ultraviolet lens 4, and image sensor 11 are in the same straight line. Pushing the first bracket 3 again can disengage the clamping block 91 from the positioning groove 92, so that the first bracket 3 can continue to slide along the first slide groove 21, thereby switching other filters. The switching and positioning method of the second bracket 5 is similar.

[0044] In addition, the camera 1 has a video recording function in addition to the photo taking function. The photo taking function and the video recording function make it easier to realize fusion imaging and accurately record the corona discharge position by recording the corona discharge image and the object image.

[0045] This recorder uses the long exposure function of the camera and points the lens toward the shooting area.

[0046] (1) When you need to take a photo that includes a black and white image of an object and an ultraviolet corona image in a daylight / bright light environment, the steps are as follows:

[0047] 1) The UV lens 4, the first solar blind filter 31, the UV image intensifier 6, the second lens assembly 7 and the image sensor 11 are arranged in a straight line, such as Figure 1 As shown;

[0048] 2) Then, the image sensor 11 of the camera 1 is exposed. The ultraviolet light of the corona discharge sequentially passes through the ultraviolet lens 4, the first day-blind filter 31, the ultraviolet image intensifier 6, the second lens assembly 7 and falls on the image sensor 11 to obtain an ultraviolet corona image.

[0049] 3) During the long exposure, the first day-blind filter 31 is quickly moved away by the first bracket 3, so that the ultraviolet lens 4, the low-transmittance filter 32, the ultraviolet image intensifier 6, the second lens assembly 7 and the image sensor 11 are in the same straight line, as shown in FIG. Figure 2 During the remaining time of the long exposure, short-wave visible light and the like form an image on the image sensor 11, so that the image sensor 11 finally obtains a photo in which the black-and-white image of the object and the ultraviolet corona image are fused.

[0050] (2) When you need to take a photo including a black and white image of an object and an ultraviolet corona image in a night / dark light environment, the steps are as follows:

[0051] 1) Let the UV lens 4, the empty frame 33, the UV image intensifier 6, the second lens assembly 7 and the image sensor 11 be in the same straight line, such as Figure 3 As shown; in an environment without visible light or in low light, there is no need to use the low-transmittance filter 32 and the first day-blind filter 31.

[0052] 2) Then, the image sensor 11 of the camera 1 starts long exposure. The ultraviolet light of the corona discharge and the ambient light sequentially pass through the ultraviolet lens 4, the ultraviolet image intensifier 6, and the second lens assembly 7 and fall on the image sensor 11, so that the image sensor 11 finally obtains a photo in which the black-and-white image of the object and the ultraviolet corona image are fused.

[0053] (3) When it is necessary to take a composite photo of the color image and the ultraviolet corona image of the object in a daytime / bright light environment, the steps are as follows:

[0054] 1) The UV lens 4, the first solar blind filter 31, the UV image intensifier 6, the second lens assembly 7 and the image sensor 11 are arranged in a straight line, such as Figure 1 As shown;

[0055] 2) Then, the image sensor 11 of the camera 1 starts long exposure. The ultraviolet light of the corona discharge sequentially passes through the ultraviolet lens 4, the first day-blind filter 31, the ultraviolet image intensifier 6, the second lens assembly 7 and falls on the image sensor 11 to obtain an ultraviolet corona image.

[0056] 3) During the long exposure, the first day-blind filter 31 is quickly moved away by the first bracket 3, and the ultraviolet image intensifier 6 and the second lens assembly 7 are quickly moved away by the second bracket 5, so that the ultraviolet lens 4, the low-transmittance filter 32, the first lens assembly 8, and the image sensor 11 are in the same straight line, as shown in FIG. Figure 6 During the remaining time of the long exposure, the visible light forms an image on the image sensor 11, so that the image sensor 11 finally obtains a photo in which the color image of the object and the ultraviolet corona image are fused.

[0057] In addition to the above embodiments, the first day-blind filter 31, the low-transmittance filter 32, the ultraviolet image intensifier 6, and the first lens assembly 8 can be arranged in sequence along the optical path and respectively set on four different brackets. Among them, the front and back order of the first day-blind filter 31 and the low-transmittance filter 32 can be interchanged. By switching different brackets to combine components, this method can also achieve corona discharge shooting, but the number of brackets is more, and the operation is more complicated than that of embodiment 1.

[0058] Example 2

[0059] like Fig. 9As shown, the difference from Example 1 is that the lens holder 2 is provided with a third slide groove 23, and the third slide groove 23 is slidably connected with a third bracket 10. The third bracket 10, the first bracket 3 and the second bracket 5 are arranged in sequence. The third bracket 10 is provided with at least two filter mounting positions arranged in parallel, and a second day-blind filter 101 is installed on one of the filter mounting positions. In this embodiment, three filter mounting positions are provided on the third bracket 10, and the second day-blind filter 101 is a day-blind filter that passes a wavelength of 200-260nm. The other two filter mounting positions are spare filter mounting positions 102. For example, when performing sewage detection, a 275nm day-blind filter is required to detect one component, and a 200-260nm day-blind filter is required to detect another sewage component.

[0060] By setting up the third bracket, the filters on the third bracket and the first bracket can adapt to different wavelength day-blind requirements and be suitable for different scenes, thereby expanding the use of the recorder.

[0061] In addition to the above embodiments, at least one of the filter installation positions of the third bracket 10 is provided with a fusion filter, which is a filter that combines a day-blind filter and a low-transmittance filter. A filter installation position on the third bracket 10 is not installed with any filter and serves as an empty frame, so that the fusion filter can be used to directly perform fusion imaging, with both corona discharge images and environmental object images. When taking fusion photos, the fusion filter and the ultraviolet image intensifier 6 need to be used in combination.

[0062] Example 3

[0063] like Fig.10 As shown, the difference from Example 2 is that a driving mechanism is connected between the first bracket 3, the second bracket 5, the third bracket 10 and the lens holder 2. Each driving mechanism drives the corresponding bracket to move along the slide groove. In this embodiment, the driving mechanism includes a meshing gear 13 and a rack 12. Taking the first bracket 3 as an example, the rack 12 is arranged on one side of the first bracket 3, the gear 13 is rotatably connected to the lens holder 2 and is linked to a motor (not shown in the figure), and the motor drives the gear 13 to rotate, so as to drive the first bracket 3 to slide along the first slide groove 21.

[0064] In addition, the driving mechanism may also adopt structures such as a linear motor or a hydraulic cylinder.

[0065] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A corona discharge observation and recording instrument, characterized in that: The invention comprises a camera (1) and a lens holder (2) which are connected to each other. The camera (1) is provided with an image sensor (11). An ultraviolet image intensifier (6), a first lens assembly (8), a first solar blind filter (31) and a low-transmittance filter (32) are movably arranged on the lens holder (2), wherein the first solar blind filter (31) and the low-transmittance filter (32) are located in front of the ultraviolet image intensifier (6) and the first lens assembly (8).

2. A corona discharge observation and recording instrument according to claim 1, characterized in that: A first bracket (3) and a second bracket (5) are movably connected to the lens holder (2); the first bracket (3), the second bracket (5) and the image sensor (11) are arranged in sequence along the incident direction of light; the first day-blind filter (31) and the low-transmittance filter (32) are arranged in parallel on the first bracket (3); the second bracket (5) is provided with a first channel (51) and a second channel (52) arranged in parallel; the first channel (51) is provided with the ultraviolet image intensifier (6); and the second channel (52) is provided with the first lens assembly (8).

3. A corona discharge observation and recording instrument according to claim 2, characterized in that: An ultraviolet lens (4) is provided at the front end of the lens seat (2), and the ultraviolet lens (4), the first bracket (3) and the second bracket (5) are arranged in sequence.

4. A corona discharge observation and recording instrument according to claim 2, characterized in that: A second lens assembly (7) is also provided in the first channel (51), and the second lens assembly (7) is located behind the ultraviolet image intensifier (6).

5. A corona discharge observation and recording instrument according to claim 2, 3 or 4, characterized in that: An empty frame (33) is also provided on the first bracket (3), and the first day-blind filter (31), the low-transmittance filter (32) and the empty frame (33) are arranged in parallel.

6. A corona discharge observation and recording instrument according to claim 5, characterized in that: The lens mount (2) is provided with a first sliding groove (21) and a second sliding groove (22); the first bracket (3) is slidably connected to the first sliding groove (21); and the second bracket (5) is slidably connected to the second sliding groove (22).

7. A corona discharge observation and recording instrument according to claim 6, characterized in that: The first day-blind filter (31), the low-transmittance filter (32), and the empty frame (33) are arranged in a straight line on the first bracket (3).

8. A corona discharge observation and recording instrument according to claim 2, characterized in that: The lens holder (2) is provided with a third slide groove (23), and a third bracket (10) is slidably connected to the third slide groove (23); the third bracket (10), the first bracket (3) and the second bracket (5) are arranged in sequence; and the third bracket (10) is provided with at least two filter installation positions arranged in parallel.

9. A corona discharge observation and recording instrument according to claim 8, characterized in that: A fusion filter is provided on at least one filter installation position of the third bracket (10).

10. A corona discharge observation and recording instrument according to claim 8, characterized in that: A driving mechanism is connected between the first bracket (3), the second bracket (5), the third bracket (10) and the lens holder (2).

Images