CN215340411U - Light-filtering transmission imaging darkroom - Google Patents

Abstract

The utility model relates to a light-filtering transmission imaging darkroom, which comprises a shell and a sealing end cover; the shell is an opaque metal shell, and is provided with an opening and an inner cavity; the opening part is from inside to outside in proper order demountable installation imaging screen, filter screen and end cover. The shape of the inner cavity is an inverted square frustum pyramid, and the top surface of the square frustum pyramid is the bottom surface of the inner cavity; the size of the inner cavity is enlarged in an equal proportion according to the field of view of the camera, and the volume of a darkroom is reduced as much as possible under the condition that the imaging size is sufficient. The imaging screen is a diffuse reflection screen, and the light filtering screen can protect the imaging screen and control the luminous flux of ambient light emitted into the darkroom. The utility model has the advantages of simple structure, strong environment stray light resistance, clear imaging, dust prevention, moisture prevention and the like.

Description

Light-filtering transmission imaging darkroom

Technical Field

The utility model belongs to the technical field of image measuring devices, and particularly relates to a filtering transmission imaging darkroom.

Background

With the development of science and technology, machine vision is increasingly applied to the measurement field, and a machine vision sensor is selected as a core component of equipment by many automatic measurement equipment manufacturers. But is limited by the instability of the image sensor in a complex light environment, so that many image-based measuring devices cannot be applied to a severe environment. The development of machine vision type measuring equipment develops higher performance on one hand and also puts requirements on environmental suitability on the other hand. Under the condition of meeting the measurement accuracy, more or even worse test environments can be used, and the image measuring device is undoubtedly enabled to have a wider application market.

However, the image measuring device in the prior art still has the technical problems of poor environment stray light interference resistance, easy damage due to the influence of moisture and dust, high equivalent performance cost and troublesome structure adjustment.

Disclosure of Invention

The utility model provides a light-filtering transmission imaging darkroom for solving the technical problems in the prior art, which has the characteristics of simple structure, strong environment stray light resistance, clear imaging, dust prevention and moisture prevention.

The utility model comprises the following technical scheme: a light filtering transmission imaging darkroom comprises a shell and a sealing end cover; the shell is an opaque metal shell, and is preferably made of an aluminum alloy material; the shell is provided with an opening and an inner cavity is arranged in the shell; the opening part is from inside to outside in proper order demountable installation imaging screen, filter screen and end cover. The device is used for imaging and measuring image points in the image measuring process, and can be used for collecting and imaging the image points of the laser light source and measuring the pixel coordinates of the image points. The shell and the sealing end cover are used for protecting the equipment body to be firm, reliable and sealed.

Furthermore, the shape of the inner cavity is an inverted regular quadrangular frustum pyramid, and the top surface of the regular quadrangular frustum pyramid is the bottom surface of the inner cavity; the size of the inner cavity is enlarged in an equal proportion according to the field of view of the camera, and the volume of a darkroom is reduced as much as possible under the condition that the imaging size is sufficient.

Furthermore, the inner cavity is integrally formed, and the surface is subjected to post-treatment by adopting an anodic oxidation technology.

Furthermore, the opening part of shell is equipped with first recess, place shell seal ring in the first recess, place the formation of image screen on the shell seal ring. The depth of the first groove is smaller than the thickness of the sealing gasket of the shell.

Furthermore, the side length of the hollow area in the middle of the sealing end cover is smaller than the side lengths of the filtering screen and the imaging screen; the inner side of the sealing end cover is provided with a second groove, an end cover sealing rubber ring is arranged in the second groove, and the end cover sealing rubber ring is positioned between the sealing end cover and the light filtering screen. The depth of the second groove is smaller than the thickness of the end cover sealing rubber ring.

Furthermore, a fastening threaded hole is formed in the sealing end cover, and mounting holes are formed in corresponding positions on the imaging screen, the filtering screen and the sealing gasket of the shell; when the sealing end cover is tightly connected with the shell through the screws, the end cover sealing rubber ring and the shell sealing washer compress the filtering screen and the imaging screen.

Further, the imaging screen is a diffuse reflection screen; the matrix of formation of image screen is a rectangular transparent plastic plate, and base member one side spraying has the filtering coating, can make the difficult darkroom that gets into of environment veiling glare, can make the better laser facula that presents of red laser ray simultaneously again.

Further, the filter screen comprises a plurality of red light limiting plates with different colors. The light filtering screen is easy to disassemble structurally, and different light limiting plates can be directly replaced when the intensity of ambient light needing filtering is different. The filter screen can protect the imaging screen and control the luminous flux of ambient light shining into the darkroom.

Furthermore, a control box is detachably mounted on the side face of the shell, and an intelligent converter and an intelligent controller are arranged in the control box. The intelligent converter can be used for converting data after the data of the camera is transmitted, for example, the data format can be changed according to the requirement, for example, information such as the time point of data acquisition is added; the intelligent controller can carry out microwave communication and electric energy supply, and can conveniently and quickly transmit the measured temperature and humidity by using a microwave communication technology.

Furthermore, an external jack is arranged on the control box and connected to the intelligent controller; after the power cord of camera or other equipment inserts external jack, intelligent control ware can provide the electric energy for it.

The utility model has the advantages and positive effects that:

1. the shell is internally provided with the integrally formed inner cavity, is preferably made of aluminum alloy, and has the characteristics of simple structure and light weight.

2. The inner cavity of the utility model is an inverted regular quadrangular frustum pyramid, so that the volume of a darkroom can be reduced as much as possible under the condition of ensuring sufficient imaging size, and the space and the materials are saved.

3. The utility model adopts the end cover sealing rubber ring and the shell sealing washer to carry out double-layer sealing, and has the characteristics of good sealing property, dust prevention and water prevention.

4. The filter screen adopted by the utility model can be replaced more conveniently, and the applicable scenes of the device are greatly increased by replacing different light limiting plates of the filter screen.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of the present invention.

In the figure, 1-housing; 101-lumen; 102-housing sealing gasket; 2-sealing the end cover; 201-end cap sealing rubber ring; 202-fastening threaded holes; 3-a first groove; 4-a second groove; 5-a filter screen; 6-an imaging screen; 7-mounting holes; 8-a screw; 9-control box.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the utility model, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

To further clarify the disclosure of the present invention, its features and advantages, reference is made to the following examples taken in conjunction with the accompanying drawings.

Example (b): referring to fig. 1, a light filtering transmission imaging darkroom comprises a shell 1 and a sealing end cover 2; the shell 1 is an aluminum alloy shell; the shell 1 is provided with an opening and an inner cavity 101 is arranged inside the shell; the imaging screen 6, the filtering screen 5 and the sealing end cover 2 are detachably mounted at the opening from inside to outside in sequence.

The inner cavity 101 is in the shape of an inverted regular quadrangular frustum pyramid, and the top surface of the regular quadrangular frustum pyramid is the bottom surface of the inner cavity 101; the size of the inner cavity 101 is enlarged in an equal proportion according to the field of view of the camera, and the volume of a darkroom is reduced as much as possible under the condition that the imaging size is sufficient. The inner cavity 101 is integrally formed, and the surface is subjected to post-treatment by adopting an anodic oxidation technology.

A first groove 3 is formed in the opening of the shell 1, a shell sealing gasket 102 is placed in the first groove 3, and an imaging screen 6 is placed on the shell sealing gasket 102. The depth of the first groove 3 is less than the thickness of the housing sealing gasket 102.

The side length of the hollow area in the middle of the sealing end cover 2 is smaller than the side lengths of the filtering screen 5 and the imaging screen 6; 2 inboards of end cover are equipped with second recess 4, place end cover sealing rubber ring 201 in the second recess 4, end cover sealing rubber ring 201 is located between end cover 2 and the filter screen 5. The depth of the second groove 4 is smaller than the thickness of the end cover sealing rubber ring 201.

A fastening threaded hole 202 is formed in the sealing end cover 2, and mounting holes 7 are formed in corresponding positions of the imaging screen 6, the filtering screen 5 and the shell sealing washer 102; when the sealing end cover 2 is tightly connected with the housing 1 through the screw 8, the end cover sealing rubber ring 201 and the housing sealing washer 102 compress the filtering screen 5 and the imaging screen 6.

The imaging screen 6 is a diffuse reflection screen; the base body of the imaging screen 6 is a rectangular transparent plastic plate, and a light filtering coating is sprayed on one side of the base body, so that environmental stray light is not easy to enter a darkroom, and red laser light can be better presented to laser spots.

The filter screen 5 comprises a plurality of red light limiting plates with different colors. The light filtering screen 5 is easy to disassemble structurally, and different light limiting plates can be directly replaced when the intensity of ambient light needing filtering is different. The filter screen 5 is able to protect the imaging screen 6 and control the amount of ambient light that is emitted into the darkroom.

The side demountable installation control box 9 of shell 1, be equipped with intelligent converter and intelligent control ware in the control box 9. The intelligent converter can be used for converting data after the data of the camera is transmitted, for example, the data format can be changed according to the requirement, for example, information such as the time point of data acquisition is added; the intelligent controller can carry out microwave communication and electric energy supply, and can conveniently and quickly transmit the measured temperature and humidity by using a microwave communication technology. An external jack 901 is arranged on the control box 9, and the external jack 901 is connected to the intelligent controller; after the power cord of camera or other equipment inserts external jack, intelligent control ware can provide the electric energy for it.

The working principle is as follows: the device is used for imaging and measuring image points in the image measuring process, and can be used for collecting and imaging the image points of the laser light source and measuring the pixel coordinates of the image points. The shell 1 and the sealing end cover 2 are used for protecting the equipment body to be firm, reliable and sealed. A special filtering coating is sprayed on one side of the imaging screen 6, so that ambient stray light is not easy to enter a darkroom, and red laser light can better present laser spots to serve as an imaging basis and facilitate measurement; the filter screen 5 is used for filtering stray light to enhance the image point definition.

While the preferred embodiments of the present invention have been illustrated and described, it will be appreciated by those skilled in the art that the foregoing embodiments are illustrative and not limiting, and that many changes may be made in the form and details of the embodiments of the utility model without departing from the spirit and scope of the utility model as defined in the appended claims. All falling within the scope of protection of the present invention.

Claims (10)

1. A filtered transmission imaging darkroom, comprising: comprises a shell and a sealing end cover; the shell is an opaque metal shell, and is provided with an opening and an inner cavity; the opening part is from inside to outside in proper order demountable installation imaging screen, filter screen and end cover.

2. The filtered, transmissive imaging darkroom of claim 1, wherein: the shape of the inner cavity is an inverted square frustum pyramid, and the top surface of the square frustum pyramid is the bottom surface of the inner cavity; the size of the inner cavity is enlarged in equal proportion according to the field of view of the camera.

3. The filtered, transmissive imaging camera as recited in claim 2, wherein: the inner cavity is integrally formed, and the surface is subjected to post-treatment by adopting an anodic oxidation technology.

4. The filtered, transmissive imaging darkroom of claim 1, wherein: the opening part of shell is equipped with first recess, place shell seal ring in the first recess, place the formation of image screen on the shell seal ring.

5. The filtered, transmissive imaging darkroom of claim 4, wherein: the side length of the hollow area in the middle of the sealing end cover is smaller than the side lengths of the filtering screen and the imaging screen; the inner side of the sealing end cover is provided with a second groove, an end cover sealing rubber ring is arranged in the second groove, and the end cover sealing rubber ring is positioned between the sealing end cover and the light filtering screen.

6. The filtered, transmissive imaging camera as recited in claim 5, wherein: the sealing end cover is provided with a fastening threaded hole, and the imaging screen, the filtering screen and the corresponding positions on the sealing gasket of the shell are provided with mounting holes; when the sealing end cover is tightly connected with the shell through the screws, the end cover sealing rubber ring and the shell sealing washer compress the filtering screen and the imaging screen.

7. The filtered transmission imaging darkroom of any one of claims 1 to 6, wherein: the imaging screen is a diffuse reflection screen; the imaging screen has a rectangular transparent plastic plate as the base and a light filtering coating sprayed on one side of the base.

8. The filtered transmission imaging darkroom of any one of claims 1 to 6, wherein: the filter screen comprises a plurality of red light limiting plates with different colors.

9. The filtered transmission imaging darkroom of any one of claims 1 to 6, wherein: the side surface of the shell is detachably provided with a control box, and an intelligent converter and an intelligent controller are arranged in the control box.

10. The filtered transmission imaging darkroom of claim 9, wherein: and the control box is provided with an external jack, and the external jack is connected to the intelligent controller.

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