Infrared detector

Abstract

The utility model discloses an infrared detector, comprising a detector main body which is internally provided with a detector target surface; the optical filter assembly comprises an optical filter fixing piece and an optical filter, the optical filter is fixedly arranged on the optical filter fixing piece, the optical filter fixing piece is fixedly arranged in the detector main body, and the optical filter is located in the detector main body and corresponds to the detector target surface; the shutter assembly is arranged in the detector main body; the lens flange is fixedly arranged on the end face of the detector body and located on the outer side of the shutter assembly. And the infrared lens is fixedly arranged on the lens flange. According to the utility model, the technical effects that the infrared detector is small in size, light in weight and strong in scene compatibility are realized under the condition that the optical filter ensures filtering.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, and more specifically, to an infrared detector. Background Art

[0002] Due to different test scenarios, existing infrared detectors often need to filter the background through a filter to obtain the gas in the required wavelength band. Generally, the filter of the infrared detector module is fixed outside the detector, which will increase the volume of the detector device, affect the integrity of the whole detector and its compatibility with multiple scenarios, and the filter is easily damaged during use. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide an infrared detector to solve the problems in the related art that the infrared detector has a large volume due to the filter being installed outside, which affects the integrity of the whole detector and its compatibility with multiple scenarios, and the filter is easily damaged during use.

[0004] To achieve the above purpose, the utility model provides an infrared detector, including:

[0005] A detector body, in which a detector target surface is arranged.

[0006] A filter assembly, which includes a filter fixing member and a filter. The filter is fixed on the filter fixing member, the filter fixing member is fixed in the detector body, and the filter is located in the detector body and corresponds to the detector target surface.

[0007] A shutter assembly, arranged in the detector body.

[0008] A lens flange, fixed on the end face of the detector body and located outside the shutter assembly.

[0009] An infrared lens, fixed on the lens flange.

[0010] Further, the filter fixing member includes a base and a pressing plate. A filter installation groove is arranged on the base, at least part of the filter is embedded in the filter installation groove, and the pressing plate is fixedly connected with the base and presses the filter in the base.

[0011] Further, the filter fixing assembly further includes a base foam and a pressing plate foam. The base foam is arranged in a ring shape and arranged in the filter installation groove, and the first end face of the filter is attached to the base foam.

[0012] The pressing plate foam is attached to the second end face of the filter, and is attached to the edge of the filter. The pressing plate is pressed on the pressing plate foam.

[0013] Furthermore, a number of connecting columns are provided on the base, and a number of connecting pieces are provided on the pressing plate. The connecting pieces correspond to the connecting columns and are fixed by screws.

[0014] Furthermore, the connecting columns protrude from the end face of the base close to the pressing plate. The connecting piece includes a vertical portion and a parallel portion. The vertical portion is vertically connected to the end face of the pressing plate;

[0015] The parallel portion is connected to the vertical portion and is parallel to the end face of the pressing plate. The parallel portion is attached to the end face of the connecting column and is fixed by screws.

[0016] Furthermore, three connecting columns are provided and are respectively located on the first side, the second side, and the third side of the end face of the pressing plate. The connecting pieces correspond to the connecting columns;

[0017] A positioning column is provided on the fourth side of the end face of the pressing plate. A positioning groove is provided on one side of the positioning column close to the filter mounting groove. The fourth side of the pressing plate is clamped in the positioning groove.

[0018] Furthermore, a number of first fixing holes are provided on the base, and a number of second fixing holes are provided on the shutter assembly. The first fixing holes and the second fixing holes correspond to each other. A fixing screw is inserted into the first fixing hole and the second fixing hole, and the fixing screw is fixedly connected to the housing of the detector body.

[0019] Furthermore, the infrared detector further includes a heat insulation sheet. The heat insulation sheet is attached to the end face of the detector body. The lens flange is fixedly connected to the end face of the detector body and is pressed on the heat insulation sheet.

[0020] Furthermore, a positioning ring is provided on the end face of the lens flange facing away from the heat insulation sheet. The infrared lens is sleeved in the positioning ring;

[0021] A number of positioning holes are provided on the positioning ring. The number of positioning holes are distributed along the circumferential direction of the positioning ring. A positioning member is provided in the positioning hole, and the positioning member is connected to the infrared lens.

[0022] Furthermore, corresponding flange connection holes are provided on the heat insulation sheet and the lens flange. The lens flange is fixedly connected to the end face of the detector body by screws passing through the flange connection holes.

[0023] In an embodiment of the present utility model, a detector body is provided, and a detector target surface is arranged inside the detector body; a filter assembly, the filter assembly includes a filter fixing member and a filter, the filter is fixed on the filter fixing member, the filter fixing member is fixed inside the detector body, and the filter is located inside the detector body and corresponds to the detector target surface; a shutter assembly, arranged inside the detector body; a lens flange, fixed on the end face of the detector body and located outside the shutter assembly; an infrared lens, fixed on the lens flange, achieving the purpose of installing the filter on the filter fixing assembly to form the filter assembly, and the filter assembly is installed inside the detector body without additionally increasing the volume of the detector, thereby realizing the technical effects of making the filter have a small volume, light weight, and strong scene compatibility of the infrared detector under the condition of ensuring the filtering conditions, and further solving the problems in the related art that the infrared detector has a large volume due to the filter being installed outside, affecting the overall integrity and multi-scene compatibility of the detector, and the filter is easily damaged during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model, making other features, objects, and advantages of the present utility model more obvious. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0025] Figure 1 is an exploded structural schematic diagram of an infrared detector according to an embodiment of the present utility model;

[0026] Figure 2 is an exploded schematic diagram of a filter fixing assembly according to an embodiment of the present utility model;

[0027] Figure 3 is a structural schematic diagram of a filter fixing assembly according to an embodiment of the present utility model;

[0028] Figure 4 is a structural schematic diagram of an infrared detector according to an embodiment of the present utility model;

[0029] Figure 5 is Figure 4 a cross-sectional structural schematic diagram of A-A in

[0030] Among them, 1 is the detector body, 100 is the detector target surface, 2 is the filter fixing member, 20 is the base, 200 is the connecting column, 201 is the first fixing hole, 202 is the filter installation groove, 203 is the positioning column, 204 is the positioning groove, 21 is the base foam, 22 is the pressing plate foam, 23 is the pressing plate, 24 is the connecting piece, 240 is the vertical part, 241 is the parallel part, 3 is the filter, 4 is the shutter assembly, 5 is the heat insulation sheet, 6 is the lens flange, 61 is the positioning ring, 610 is the positioning hole, and 7 is the infrared lens. Detailed implementation manners

[0031] In order to enable those skilled in the art to better understand the solutions of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so as to implement the embodiments of the present utility model described herein.

[0033] In the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0034] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above-mentioned terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.

[0035] In addition, terms such as "arranged", "provided with", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In addition, the meaning of the term "plurality" should be two or more.

[0037] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0038] To solve related technical problems, such as Figures 1 to 5As shown in the figure, an embodiment of the present utility model provides an infrared detector, comprising:

[0039] A detector main body 1, in which a detector target surface 100 is arranged;

[0040] A filter assembly, which includes a filter fixing member 2 and a filter 3. The filter 3 is fixedly arranged on the filter fixing member 2, the filter fixing member 2 is fixedly arranged in the detector main body 1, and the filter 3 is located in the detector main body 1 and corresponds to the detector target surface 100;

[0041] A shutter assembly 4, arranged in the detector main body 1;

[0042] A lens flange 6, fixedly arranged on the end face of the detector main body 1 and located outside the shutter assembly 4;

[0043] An infrared lens 7, fixedly arranged on the lens flange 6.

[0044] In this embodiment, the infrared detector mainly includes a detector main body 1, a filter assembly, a shutter assembly 4 and an infrared lens 7. Among them, detector elements including the detector target surface 100 are arranged in the detector main body 1. The filter assembly and the shutter assembly 4 are both installed inside the detector main body 1, and the infrared lens 7 is installed on the detector main body 1 through the lens flange 6. The filter assembly mainly includes a filter fixing member 2 and a filter 3. The filter fixing member 2 is used to install the filter 3 and can be fixedly installed inside the detector main body 1. In this embodiment, the specific structure of the filter fixing member 2 is not limited, and the filter fixing member 2 and the filter 3 can be connected by bonding, crimping and other connection methods. After the filter 3 is installed on the filter fixing member 2, an independent filter assembly is formed, and this filter assembly can be installed inside the detector main body 1. To ensure the filtering effect, the center of the filter 3 is aligned with the center of the detector target surface 100.

[0045] The shutter assembly 4 can adopt the shutter structure of the infrared detector in the related technology, and it will not be elaborated here in this embodiment. In one implementation manner, the shutter assembly 4 is installed inside the detector main body 1 and located outside the filter assembly, that is, on the side close to the infrared lens 7. The lens flange 6 is fixedly connected to the end face of the detector main body 1, which can be connected by screws or bonding, etc., and the infrared lens 7 is fixed on the lens flange 6. The infrared lens 7 and the lens flange 6 can adopt the socket fixing or snap fixing method, and this embodiment does not limit it here.

[0046] In another implementation manner, the shutter assembly 4 can also be installed inside the detector main body 1 and located inside the filter assembly. In yet another implementation manner, the shutter assembly 4 can also be installed inside the filter assembly.

[0047] In the present utility model, the filter 3 is installed on the filter fixing assembly to form a filter assembly, and the filter assembly is installed in the detector main body 1, making full use of the internal space of the detector main body 1 without additionally increasing the volume of the detector, thereby achieving the purpose of making the filter 3 achieve the technical effects of small volume, light weight, strong scene compatibility of the infrared detector under the condition of ensuring the filtering conditions, and ensuring the integrity of the appearance of the detector, and further solving the problems in the related art that the infrared detector has a large volume due to the installation of the filter 3 outside, affecting the overall integrity and multi-scene compatibility of the detector, and the filter 3 is easily damaged during use.

[0048] As Figures 1 to 3 shown, in an embodiment of the filter fixing member 2, to facilitate the installation and fixation of the filter 3, the filter fixing member 2 in this embodiment includes a base 20 and a pressing plate 23. A filter installation groove 202 is provided on the base 20, and at least a part of the filter 3 is embedded in the filter installation groove 202. The pressing plate 23 is fixedly connected to the base 20 and presses the filter 3 in the base 20.

[0049] Specifically, in this embodiment, a filter hole is provided on the base 20, and a filter installation groove 202 is provided at the edge of the filter hole. The shape of the filter installation groove 202 fits the shape of the filter 3, and the filter 3 can be embedded in the filter installation groove 202. The light wave passes through the filter 3 and then enters the detector main body 1 through the filter hole. The depth of the filter installation groove 202 can be less than the thickness of the filter 3, so that only a part of the filter 3 is embedded in the filter installation groove 202. Of course, the depth of the filter installation groove 202 can also be less than or equal to the thickness of the filter 3, and this is not limited herein in this embodiment.

[0050] After the filter 3 is installed in the filter installation groove 202, to facilitate the fixation of the filter 3, the filter fixing member 2 in this embodiment further includes a pressing plate 23. A filter hole is also provided on the pressing plate 23, and the filter hole on the pressing plate 23 is consistent with the filter hole on the base 20 in terms of position and size. After the filter 3 is installed, the pressing plate 23 is placed on the filter 3 and fits the edge of the filter 3, and the pressing plate 23 is fixedly connected to the base 20 to press the filter 3 in the base 20. The pressing plate 23 and the base 20 can be fixed by snap connection or screw connection, and this is not limited herein in this embodiment.

[0051] As Figure 2 shown, to improve the space utilization rate, the filter 3 in the present utility model is set to be circular, and correspondingly, the filter installation groove 202 and the filter hole are also set to be circular.

[0052] As Figure 2As shown, to prevent the pressing plate 23 from damaging the filter 3 when fixing the filter 3, the filter 3 fixing assembly in this embodiment further includes a base foam 21 and a pressing plate foam 22. The base foam 21 is arranged in a ring shape and is disposed in the filter mounting groove 202, and the first end face of the filter 3 is in contact with the base foam 21.

[0053] The pressing plate foam 22 is attached to the second end face of the filter 3 and is in contact with the edge of the filter 3, and the pressing plate 23 is pressed on the pressing plate foam 22.

[0054] Specifically, in this embodiment, to protect the filter 3, foams are arranged on both the first end face and the second end face of the filter 3. Among them, a base foam 21 is provided on the first end face of the filter 3. The base foam 21 is arranged in a ring shape and is embedded in the filter mounting groove 202. After the filter 3 is installed, its first end face is in contact with the base foam 21, avoiding rigid contact between the first end face of the filter 3 and the filter mounting groove 202. At the same time, a pressing plate foam 22 is provided on the second end face of the filter 3. After installation, the pressing plate foam 22 is located between the filter 3 and the pressing plate 23. The pressing plate foam 22 is also provided with filter holes, and the pressing plate foam 22 is in contact with the edge of the filter 3, and the pressing plate foam 22 can avoid rigid contact between the second end face of the filter 3 and the pressing plate 23.

[0055] In this embodiment, the pressing plate foam 22 can be arranged in the same ring shape as the base foam 21, or can be arranged in a structure with a square outer contour. As Figure 2 shown, when arranged in a square shape, the part of the pressing plate foam 22 extending beyond the edge of the filter 3 is located between the base 20 and the pressing plate 23, so as to be able to play a role in buffering the force between the base 20 and the pressing plate 23.

[0056] As Figure 2 and Figure 3 shown, to facilitate the connection between the pressing plate 23 and the base 20, in this embodiment, a plurality of connecting columns 200 are provided on the base 20, and a plurality of connecting pieces 24 are provided on the pressing plate 23. The connecting pieces 24 correspond to the connecting columns 200 and are fixed by screws.

[0057] In this embodiment, the connecting columns 200 can be provided in multiple numbers and are distributed around the base 20. Similarly, the connecting pieces 24 can also be provided in multiple numbers and are distributed around the pressing plate 23. The connecting pieces 24 correspond to the connecting columns 200 one by one.

[0058] When the thickness of the filter 3 is greater than the depth of the filter mounting groove 202, the filter 3 protrudes from the end face of the base 20. At this time, for the convenience of connecting the pressing plate 23 and the base 20, in this embodiment, the connecting column 200 protrudes from the end face of the base 20 close to the pressing plate 23. The connecting piece 24 includes a vertical portion 240 and a parallel portion 241. The vertical portion 240 is vertically connected to the end face of the pressing plate 23; the parallel portion 241 is connected to the vertical portion 240 and is parallel to the end face of the pressing plate 23. The parallel portion 241 is attached to the end face of the connecting column 200 and is fixed by screws. In this embodiment, the connecting piece 24 is generally arranged in an inverted L shape. After the pressing plate 23 is pressed on the filter 3, the parallel portion 241 of the connecting piece 24 is attached to the end face of the connecting column 200.

[0059] As Figure 2 and Figure 3 shown, in one embodiment of the connecting column 200, the connecting column 200 is provided with three and is respectively located on the first side, the second side, and the third side of the end face of the pressing plate 23. The connecting piece 24 corresponds to the connecting column 200, so that the pressing plate 23 can be stably fixed to the base 20. On this basis, for the convenience of positioning the pressing plate 23 during installation, a positioning column 203 is provided on the fourth side of the end face of the pressing plate 23 in this embodiment. A positioning groove 204 is provided on the side of the positioning column 203 close to the filter mounting groove 202. The fourth side of the pressing plate 23 is clamped in the positioning groove 204.

[0060] As Figure 1 shown, for the convenience of installing the shutter assembly 4 and the base 20 in the detector body 1, a plurality of first fixing holes 201 are provided on the base 20 in this embodiment, and a plurality of second fixing holes are provided on the shutter assembly 4. The first fixing holes 201 and the second fixing holes correspond to each other, and fixing screws are inserted into the first fixing holes 201 and the second fixing holes. The fixing screws are fixedly connected to the housing of the detector body 1.

[0061] As Figure 1 、 Figure 4 and Figure 5 shown, in order to reduce the mutual interference of heat between the infrared lens 7 and the detector body 1, the infrared detector in this embodiment further includes a heat insulation sheet 5. The heat insulation sheet 5 is attached to the end face of the detector body 1. The lens flange 6 is fixedly connected to the end face of the detector body 1 and is pressed on the heat insulation sheet 5. In this embodiment, the heat insulation sheet 5 can reduce the heat interference between the infrared lens 7 and the detector body 1 to a certain extent, ensuring the test accuracy of the detector body 1. The heat insulation sheet 5 can be made of a material with better heat insulation performance, such as asbestos and so on.

[0062] For the convenience of installing the infrared lens 7, in this embodiment, a positioning ring 61 is provided on the end face of the lens flange 6 facing away from the heat insulation sheet 5, and the infrared lens 7 is sleeved within the positioning ring 61; a number of positioning holes 610 are provided on the positioning ring 61, and the number of positioning holes 610 are distributed along the circumferential direction of the positioning ring 61. A positioning member is provided within the positioning holes 610, and the positioning member is connected to the infrared lens 7. In this embodiment, the positioning member can be threadedly connected to the positioning ring 61 and abutted against the infrared lens 7 to position the infrared lens 7, or the positioning member is threadedly connected to the infrared connection to position the infrared connection.

[0063] For the convenience of fixing the heat insulation sheet 5, in this embodiment, corresponding flange connection holes are provided on the heat insulation sheet 5 and the lens flange 6, and the lens flange 6 is fixedly connected to the end face of the detector body 1 by screws passing through the flange connection holes.

[0064] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An infrared detector, characterized in that, Comprising: A detector body, within which a detector target surface is provided; A filter assembly, the filter assembly including a filter fixing member and a filter, the filter being fixedly arranged on the filter fixing member, the filter fixing member being fixedly arranged within the detector body, the filter being located within the detector body and corresponding to the detector target surface; A shutter assembly, arranged within the detector body; A lens flange, fixedly arranged on the end face of the detector body and located outside the shutter assembly; An infrared lens, fixedly arranged on the lens flange.

2. The infrared detector according to claim 1, wherein The filter fixing member includes a base and a pressing plate, a filter mounting groove is provided on the base, at least a part of the filter is embedded in the filter mounting groove, the pressing plate is fixedly connected to the base and presses the filter within the base.

3. The infrared detector according to claim 2, characterized in that, The filter fixing assembly further includes a base foam and a pressing plate foam, the base foam is arranged in a ring shape and is arranged in the filter mounting groove, the first end face of the filter is in contact with the base foam; The pressing plate foam is attached to the second end face of the filter and is in contact with the edge of the filter, the pressing plate is pressed on the pressing plate foam.

4. The infrared detector according to claim 3, characterized in that, A plurality of connecting columns are provided on the base, a plurality of connecting pieces are provided on the pressing plate, the connecting pieces correspond to the connecting columns and are fixed by screws.

5. The infrared detector according to claim 4, characterized in that, The connecting columns protrude from the end face of the base close to the pressing plate, the connecting piece includes a vertical portion and a parallel portion, the vertical portion is vertically connected to the end face of the pressing plate; The parallel portion is connected to the vertical portion and is parallel to the end face of the pressing plate, the parallel portion is attached to the end face of the connecting column and is fixed by screws.

6. The infrared detector according to claim 5, characterized in that, The connecting columns are arranged in three and are respectively located on the first side, the second side and the third side of the end face of the pressing plate, the connecting pieces correspond to the connecting columns; A positioning column is provided on the fourth side of the end face of the pressing plate, a positioning groove is provided on one side of the positioning column close to the filter mounting groove, and the fourth side of the pressing plate is clamped in the positioning groove.

7. The infrared detector according to claim 2, wherein A plurality of first fixing holes are provided on the base, a plurality of second fixing holes are provided on the shutter assembly, the first fixing holes and the second fixing holes correspond to each other, fixing screws are inserted into the first fixing holes and the second fixing holes, and the fixing screws are fixedly connected to the housing of the detector body.

8. The infrared detector according to claim 1, wherein The infrared detector further includes a heat insulation sheet, the heat insulation sheet is attached to the end face of the detector body, the lens flange is fixedly connected to the end face of the detector body and is pressed on the heat insulation sheet.

9. The infrared detector according to claim 8, characterized in that, A positioning ring is provided on the end face of the lens flange facing away from the heat insulation sheet, the infrared lens is sleeved within the positioning ring; A plurality of positioning holes are provided on the positioning ring, the plurality of positioning holes are distributed along the circumferential direction of the positioning ring, positioning members are arranged within the positioning holes, and the positioning members are connected to the infrared lens.

10. The infrared detector according to claim 8, characterized in that, Corresponding flange connection holes are provided on the heat insulation sheet and the lens flange, and the lens flange is fixedly connected to the end face of the detector body by screws passing through the flange connection holes.

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