Waterproof infrared detection device

Abstract

The utility model provides a waterproof infrared detection device, waterproof infrared detection device includes a casing, a lens and at least one pyroelectric infrared sensor, wherein the casing has a cloth mirror window and a cloth mirror along of delimiting the cloth mirror window with the inside space and outside space of casing intercommunication, wherein the pyroelectric infrared sensor is with its sensing surface towards the cloth mirror window state is arranged in the inside space of casing, wherein the lens has a set along, the lens is installed in the cloth mirror window with the set along interference fit state of cloth mirror along, thereby realizing water -resisting seal based on the interference fit between the lens and cloth mirror along.

Description

Technical Field

[0001] This utility model relates to the field of infrared detection, and in particular to a waterproof infrared detection device. Background Technology

[0002] With the development of IoT technology and the popularization of low-carbon and environmentally friendly concepts, artificial intelligence, smart home, and smart security technologies are increasingly demanding environmental detection, especially human movement detection. This allows for intelligent control of electrical equipment's operating status by controlling the detection results of human presence or absence. For example, intelligent low-carbon lighting can be achieved by controlling the lighting status of lamps based on the detection results of human presence or absence.

[0003] Among existing technologies for detecting human presence, the most widely used and mature technology is based on using a Fresnel lens to partition a corresponding detection area and then using a pyroelectric infrared sensor (PIR) to detect cross-regional movements of the human body within that area. Existing infrared detection devices include a Fresnel lens, a pyroelectric infrared sensor, and a housing. The Fresnel lens has a light-receiving surface, and on the side opposite the light-receiving surface, a lens array composed of multiple lenses is formed based on a corresponding texture design. Each lens unit has light-gathering characteristics. The housing has a lens window connecting its internal and external spaces. The Fresnel lens is mounted in the lens window of the housing, and the pyroelectric infrared sensor is positioned within the housing on the side facing the Fresnel lens opposite the light-receiving surface. In existing technologies, the Fresnel lens is typically fixed to the lens window using methods such as adhesive application, ultrasonic welding, die bonding, or screw connection, resulting in complex assembly processes. For waterproofing purposes, adhesive bonding is often used. However, due to the heat generated during device operation and / or the effects of wind and sun exposure in outdoor applications, the adhesive is prone to aging, resulting in poor actual waterproofing. Furthermore, existing infrared detection devices require additional potentiometers and other devices on the detection surface for parameter adjustment and other functions. This necessitates setting up an additional area around the Fresnel lens to accommodate these devices, complicating the assembly process and impacting the waterproofing performance of the infrared detection device. Utility Model Content

[0004] One objective of this invention is to provide a waterproof infrared detection device, wherein the lens is mounted on the housing using an interference fit, and the deformation generated by the interference fit forms a water-resistant seal, thereby achieving good waterproof performance.

[0005] Another objective of this invention is to provide a waterproof infrared detection device, wherein the waterproof infrared detection device achieves waterproofing by interfering with the lens and the housing, which helps to reduce the impact of device heat generation and / or outdoor wind and sun exposure on waterproofing performance, thus ensuring the waterproof performance of the waterproof infrared detection device.

[0006] Another objective of this invention is to provide a waterproof infrared detection device, wherein the lens is mounted on the housing using an interference fit, which facilitates the assembly process and improves production efficiency.

[0007] Another objective of this invention is to provide a waterproof infrared detection device, wherein the waterproof infrared detection device includes a housing, a lens, and at least one pyroelectric infrared sensor, wherein the housing has a lens window connecting the internal space and the external space of the housing and a lens edge defining the lens window, wherein the pyroelectric infrared sensor is disposed in the internal space of the housing with its sensing surface facing the lens window, wherein the lens has a mounting edge, and the lens is mounted on the lens window with the mounting edge interference fit to the lens edge, thereby achieving a water-resistant seal based on the interference fit between the lens and the lens edge.

[0008] Another objective of this invention is to provide a waterproof infrared detection device, wherein the waterproof infrared detection device includes a limiting ring, wherein one end of the limiting ring is installed on the housing, and the other end is pressed against the mounting edge of the lens in the direction of the housing to form an anti-detachment limiting between the lens and the mounting edge, so as to prevent the lens from detaching from the housing.

[0009] Another objective of this invention is to provide a waterproof infrared detection device, wherein the lens is disposed on the edge of the cloth and forms an interference fit with the edge of the cloth. The slight deformation generated by the interference fit between the lens and / or the edge of the cloth forms a water-resistant seal between the lens and the edge of the cloth, thereby achieving a waterproof setting and having good waterproof performance for the waterproof infrared detection device.

[0010] Another objective of this invention is to provide a waterproof infrared detection device, wherein the lens is disposed on the edge of the fabric lens by an interference fit, thereby eliminating the need for bonding to the edge of the fabric lens with adhesives or the like. This effectively avoids the impact on waterproof performance caused by heat generation during device operation and / or aging of the adhesive due to outdoor wind and sun exposure, thus helping to ensure the waterproof performance of the waterproof infrared detection device and extend its service life.

[0011] Another objective of this utility model is to provide a waterproof infrared detection device. In the assembly process of the waterproof infrared detection device, it is only necessary to place the lens on the edge of the lens and install the limiting ring on the housing to complete the assembly of the waterproof infrared detection device. There is no need for complicated operations such as dispensing glue, welding, molding, and screw tightening, thereby simplifying the production process of the waterproof infrared detection device and improving the production efficiency of the waterproof infrared detection device.

[0012] Another objective of this invention is to provide a waterproof infrared detection device, wherein the limiting ring includes a retaining ring and a limiting edge extending inwardly from the inner wall of the retaining ring. The limiting ring is detachably fitted and fixed to the outer surface of the housing by the retaining ring. When the retaining ring is fitted to the outer surface of the housing, the limiting edge is fitted to the outer surface of the fitting edge to press the fitting edge toward the housing and clamp the fitting edge with the lens edge, so as to facilitate the fitting and installation of the limiting ring and ensure that the limiting ring applies limiting force to the fitting edge and the lens edge.

[0013] Another objective of this utility model is to provide a waterproof infrared detection device, wherein the sleeve extends outward from its outer surface with an outward convex edge, wherein when the retaining ring is fitted onto the outer surface of the housing, the outward convex edge abuts against the upper surface of the limiting edge, thereby strengthening the interference fit between the sleeve edge and the lens edge, and forming the limiting ring to limit the upper and lower positions of the lens.

[0014] Another objective of this utility model is to provide a waterproof infrared detection device, wherein the housing and the retaining ring have a mutually matching snap-fit ​​structure, wherein the retaining ring is snap-fitted and installed on the housing based on the snap-fit ​​structure, and in the state where the retaining ring is installed on the housing, the limiting edge forms an anti-dislodgement limiting between the lens and the lens edge, thereby facilitating the installation of the limiting ring based on the snap-fit ​​method, which helps to simplify the assembly process of the waterproof infrared detection device.

[0015] Another objective of this utility model is to provide a waterproof infrared detection device, wherein the snap-fit ​​structure includes a snap-fit ​​position disposed on the housing and a snap fastener disposed on the snap ring, wherein the snap-fit ​​position protrudes and extends from the outer surface of the housing, so that when the snap fastener is snapped into the snap-fit ​​position, the inner surface of the snap ring and the outer surface of the housing below the snap-fit ​​position form a deformation gap, thereby facilitating the installation and removal of the limiting ring.

[0016] Another objective of this invention is to provide a waterproof infrared detection device, wherein the number of pyroelectric infrared sensors is multiple, the lens can form partitions for each detection direction, simplifying the structure of the waterproof infrared detection device, and the lens is also suitable for not affecting the normal operation of the pyroelectric infrared sensors when support components and / or control components are provided, which is beneficial to the miniaturization of the waterproof infrared detection device and to ensuring the strength of the lens while achieving the thinning of the lens.

[0017] Another objective of this invention is to provide a waterproof infrared detection device, wherein the lens includes a central lens area and a wide-angle lens area surrounding the central lens area. An isolation area is provided in the center of the central lens area, and the isolation area has at least three isolation bands extending toward the edge of the central lens area. A lens distribution area is formed between two adjacent isolation bands in the central lens area, thereby forming at least three circumferentially spaced lens distribution areas. Each of the at least three circumferentially spaced lens distribution areas is responsible for a circumferential horizontal field of view, with each lens distribution area corresponding to one pyroelectric infrared sensor, achieving 360° horizontal field of view coverage. The spacing between the lens distribution areas based on the isolation area enables partitioning and isolation of each pyroelectric infrared sensor, which helps avoid mutual interference between the pyroelectric infrared sensors and simplifies the process, eliminating the need for compartmentalized structures for each pyroelectric infrared sensor within the housing.

[0018] According to one aspect of the present invention, a waterproof infrared detection device is provided, wherein the waterproof infrared detection device comprises:

[0019] A housing, wherein the housing has a mirror window communicating with an internal space and an external space of the housing and a mirror edge defining the mirror window;

[0020] A lens, wherein the lens has a mounting edge, and the lens is mounted to the lens window in a manner in which the mounting edge is interference-fitted onto the outer surface of the lens edge; and

[0021] At least one pyroelectric infrared sensor, wherein the pyroelectric infrared sensor is disposed in the interior space of the housing with its sensing surface facing the cloth window.

[0022] In one embodiment, the lens is provided on the lens edge in a state of being fitted over the outer surface of the lens edge and having an interference fit with the lens edge.

[0023] In one embodiment, the lens is provided on the lens edge in a state of being nested within the inner surface of the lens edge and is interference-fitted with the lens edge.

[0024] In one embodiment, the waterproof infrared detection device includes a limiting ring, one end of which is mounted on the housing, and the other end is pressed against the mounting edge of the lens in the direction of the housing to form an anti-detachment limiting between the lens and the mounting edge.

[0025] In one embodiment, the limiting ring includes a retaining ring and a limiting edge extending inwardly from the inner wall of the retaining ring. The limiting ring is detachably fixed to the outer surface of the housing by the retaining ring. When the retaining ring is fitted onto the outer surface of the housing, the limiting edge is fitted onto the outer surface of the fitting edge to press the fitting edge toward the housing and thereby interference-clamp the fitting edge with the fabric edge.

[0026] In one embodiment, the sleeve has an outwardly projecting edge extending from its outer surface, wherein, when the retaining ring is fitted onto the outer surface of the housing, the outwardly projecting edge abuts against the upper surface of the limiting edge.

[0027] In one embodiment, the housing and the retaining ring have a mutually matching snap-fit ​​structure, wherein the retaining ring is snap-fitted onto the housing based on the snap-fit ​​structure.

[0028] In one embodiment, the snap-fit ​​structure includes a snap-fit ​​position disposed on the housing and a snap fastener disposed on the snap ring, wherein the snap-fit ​​position protrudes and extends from the outer surface of the housing so that, in the state where the snap fastener is snapped into the snap-fit ​​position, the inner surface of the snap ring and the outer surface of the housing below the snap-fit ​​position form a deformation gap.

[0029] In one embodiment, the waterproof infrared detection device further includes a shielding cover, wherein the shielding cover is used to shield the area below the lens window, and the shape of the shielding cover is designed to form a partitioned shielding of the light-gathering angle of the lens. The shielding cover includes a mounting buckle, and the limiting edge is provided with a mounting opening that matches the mounting buckle. The shielding cover is installed on the limiting ring with the mounting buckle inserted into the mounting opening and thus shields the area below the lens window.

[0030] In one embodiment, the number of pyroelectric infrared sensors is plurality of, wherein the lens includes a central lens region and a wide-angle lens region disposed around the central lens region, wherein an isolation region is disposed in the middle of the central lens region, the isolation region having at least three isolation bands extending toward the edge of the central lens region, the central lens region forming a lens distribution region between two adjacent isolation bands, wherein each lens distribution region includes a plurality of lens units arranged in an array, wherein each lens unit of the same lens distribution region is matched with the same pyroelectric infrared sensor to form a matching relationship between the lens distribution region and the pyroelectric infrared sensor, and different lens distribution regions are matched with different pyroelectric infrared sensors, wherein each pyroelectric infrared sensor is disposed facing away from and tilted, with its sensing surface facing the lens distribution region.

[0031] In one embodiment, the isolation strip extends to the outer edge of the wide-angle lens region to divide the wide-angle lens region into at least three far-field lens distribution regions, each far-field lens distribution region comprising an array of multiple lens units, wherein the far-field lens distribution region and its radially adjacent lens distribution region are matched with the same pyroelectric infrared sensor.

[0032] In one embodiment, the waterproof infrared detection device includes a control component, one end of which is disposed in the isolation area of ​​the lens, and the other end is connected to a corresponding circuit structure in the internal space of the housing.

[0033] In one embodiment, the waterproof infrared detection device includes a support column, one end of which abuts against the isolation area of ​​the lens, and the other end is installed in the internal space of the housing to form support for the lens.

[0034] In one embodiment, the control component includes a temperature sensor and at least one potentiometer. The temperature sensor is disposed in the isolation area of ​​the lens, and the potentiometer is disposed in the internal space of the housing and extends to the isolation area. The temperature sensor is disposed at one end of the support column, and the support column is configured as a hollow column. The waterproof infrared detection device includes a ribbon cable, one end of which is electrically connected to the temperature sensor and runs through the hollow support column, and the other end is electrically connected to a corresponding circuit in the internal space of the housing.

[0035] The further objectives and advantages of this invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0036] Figure 1This is an exploded structural diagram of a waterproof infrared detection device according to an embodiment of the present invention.

[0037] Figure 2 This is a partial structural schematic diagram of the waterproof infrared detection device according to the above embodiments of the present invention.

[0038] Figure 3A This is a schematic diagram of the principle structure of a lens in the waterproof infrared detection device according to the above embodiments of the present invention.

[0039] Figure 3B This is a cross-sectional schematic diagram of the lens of the waterproof infrared detection device according to the above embodiments of the present invention.

[0040] Figure 3C This is a cross-sectional schematic diagram of another lens in the waterproof infrared detection device according to the above embodiments of the present invention.

[0041] Figure 3D This is a schematic diagram of the principle structure of a lens in the waterproof infrared detection device according to the above embodiments of the present invention.

[0042] Figure 4 This is an exploded structural diagram of a preferred structure of the waterproof infrared detection device according to the above embodiments of the present invention.

[0043] Figure 5 This is a cross-sectional structural diagram of the preferred structure of the waterproof infrared detection device according to the above embodiments of the present invention from one perspective.

[0044] Figure 6A This is a schematic diagram of the partitioned field of view formed by the waterproof infrared detection device according to the above embodiment of the present invention, facing upwards from one side.

[0045] Figure 6B This is a schematic diagram of the field of view distribution formed by the waterproof infrared detection device according to the above embodiment of the present invention, with one side facing upward.

[0046] Figure 7 This is a cross-sectional structural schematic diagram of the preferred structure of the waterproof infrared detection device according to the above embodiments of the present invention from another perspective.

[0047] Figure 8 This is a schematic diagram showing the structure of the waterproof infrared detection device according to the above embodiments of the present invention, further provided with a shielding cover.

[0048] Figure 9A This is a schematic diagram of the waterproof infrared detection device according to the above embodiments of the present invention, showing an optional installation method.

[0049] Figure 9B This is a schematic diagram of the waterproof infrared detection device according to the above embodiments of the present invention, showing an optional installation method.

[0050] Figure 9C This is a schematic diagram of the waterproof infrared detection device according to the above embodiments of the present invention, showing an optional installation method.

[0051] Figure 9D This is a schematic diagram of the waterproof infrared detection device according to the above embodiments of the present invention, showing an optional installation method.

[0052] Figure 10A This is a schematic diagram of an optional wiring configuration for the waterproof infrared detection device according to the above embodiments of this utility model.

[0053] Figure 10B This is a schematic diagram of an optional wiring configuration for the waterproof infrared detection device according to the above embodiments of this utility model.

[0054] Figure 11A This is a structural schematic diagram of a high-installation version of the waterproof infrared detection device according to the above embodiments of this utility model.

[0055] Figure 11B This is a cross-sectional structural diagram of the high-mount version of the waterproof infrared detection device according to the above embodiments of the present invention.

[0056] Figure 12A This is a schematic diagram of a modified structure of the waterproof infrared detection device according to the above embodiment of the present invention.

[0057] Figure 12B This is a cross-sectional schematic diagram of the modified structure of the waterproof infrared detection device according to the above embodiment of the present invention. Detailed Implementation

[0058] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0059] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0060] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0061] Refer to the accompanying drawings in the specification of this utility model. Figure 1 and Figure 2 The present invention provides a waterproof infrared detection device 100, which includes a lens 10, at least one pyroelectric infrared sensor 20, and a housing 30. The housing 30 has a lens window 301 connecting the internal space and the external space of the housing 30 and a lens edge 31 defining the lens window 301. The pyroelectric infrared sensor 20 is disposed in the internal space of the housing 30 with its sensing surface facing the lens window 301. The lens 10 has a fitting edge 101 and is mounted on the lens window 301 with the fitting edge 101 in an interference fit with the lens edge 31, thereby achieving a water-blocking seal based on the interference fit between the lens 10 and the lens edge 31.

[0062] It is worth mentioning that the mounting edge 101 of the lens 10 is disposed on the lens edge 31 and forms an interference fit with the lens edge 31. Based on the slight deformation caused by the interference fit between the lens 10 and / or the lens edge 31, a water-resistant seal is formed between the lens 10 and the lens edge 31, thereby achieving the waterproof setting of the waterproof infrared detection device 100 and having good waterproof performance.

[0063] In particular, the lens 10 is disposed on the lens edge 31 by an interference fit, so that it does not need to be bonded to the lens edge 31 by means of adhesive or the like. Therefore, it can effectively avoid the aging of adhesive caused by the heat generated during device operation and / or outdoor wind and sun exposure, which affects the waterproof performance. This helps to ensure the waterproof performance of the waterproof infrared detection device 100 and helps to extend the service life of the waterproof infrared detection device 100.

[0064] Specifically, in this embodiment of the present invention, the mounting edge 101 of the lens 10 is disposed on the outer surface of the fabric lens edge 31 and is press-fitted with the fabric lens edge 31. Furthermore, the waterproof infrared detection device 100 includes a limiting ring 40, one end of which is installed on the housing 30, and the other end is pressed against the mounting edge 101 of the lens 10 toward the housing 30 to form an anti-dislodgement limiting between the lens 10 and the fabric lens edge 31, so as to prevent the lens 10 from being loosened from the housing 20.

[0065] It is also worth mentioning that, during the assembly process of the waterproof infrared detection device 100, the lens 10 can be installed simply by placing it on the lens edge 31 and the limiting ring 40 on the housing 30. This eliminates the need for complex operations such as gluing, welding, molding, and screw tightening, thereby simplifying the production process of the waterproof infrared detection device 100 and improving its production efficiency.

[0066] It is worth mentioning that, in some embodiments of the present invention, the mounting edge 101 of the lens 10 is disposed on the lens edge 31 in a state of being nested within the inner surface of the lens edge 31 and is interference-fitted with the lens edge 31.

[0067] Furthermore, the limiting ring 40 includes a retaining ring 41 and a limiting edge 42 extending inwardly from the inner wall of the retaining ring 41. The limiting ring 40 is detachably fixed to the outer surface of the housing 30 by the retaining ring 41. When the retaining ring 41 is fitted onto the outer surface of the housing 30, the limiting edge 42 is fitted onto the outer surface of the fitting edge 101 to press the fitting edge 101 toward the housing 20, thereby interfering with the fitting edge 31 to clamp the fitting edge 101, so as to facilitate the fitting and installation of the limiting ring 40 and ensure that the limiting ring 40 applies limiting force to the fitting edge 101 and the fitting edge 31.

[0068] It is worth mentioning that the fitting edge 101 extends outward from its outer surface with an outward protrusion edge 102. When the retaining ring 41 is fitted onto the outer surface of the housing 30, the outward protrusion edge 102 abuts against the upper surface of the limiting edge 42. This strengthens the interference fit between the fitting edge 101 and the lens edge 31, and also forms the limiting ring 40 to limit the upper and lower positions of the lens 10.

[0069] It is understood that the way in which the limiting ring 40 is fitted onto the housing 30 can be varied in specific implementation, such as by threaded connection, screw fixing, etc. Preferably, in this embodiment of the present invention, the housing 30 and the limiting ring 40 are connected by a snap-fit ​​connection to facilitate the assembly of the limiting ring 40.

[0070] Specifically, the housing 30 and the retaining ring 41 have a matching snap-fit ​​structure. For example, in this embodiment of the present invention, the retaining ring 41 is provided with a buckle 51, and the housing 30 is provided with a locking position 52 that matches the buckle 51. The retaining ring 41 is snapped onto the housing based on the buckle 51 snapping onto the locking position 52. When the retaining ring 41 is installed on the housing 30, the limiting edge 42 forms an anti-disengagement limiting between the lens 10 and the lens edge 31. Thus, the snap-fit ​​method facilitates the installation of the limiting ring 42 and simplifies the assembly process of the waterproof infrared detection device 100.

[0071] It is understood that the positions of the buckle 51 and the locking position 52 do not constitute a limitation on the present invention. In specific implementation, the positions of the buckle 51 and the locking position 52 can be interchanged, that is, the buckle 51 is provided on the housing 30 and the locking position 52 is provided on the retaining ring 41. Alternatively, both the housing 30 and the retaining ring 41 may be provided with the buckle 51 and the locking position 52. The present invention does not limit this.

[0072] Preferably, refer to Figure 2 As shown, in this embodiment of the present invention, the buckle 51 is disposed on the limiting ring 40, and the locking position 52 is disposed on the housing 30. The locking position 52 protrudes and extends on the outer surface of the housing 30. When the buckle 51 is engaged with the locking position 52, a deformation gap is formed between the inner surface of the retaining ring 41 and the outer surface of the housing 30 below the locking position 51, thereby facilitating the installation and removal of the limiting ring 40.

[0073] It is worth mentioning that the limiting edge 42 is located at the lower edge of the retaining ring 41, which is beneficial for snapping the limiting ring 40 into the housing 30 and forming a limiting position to prevent the lens 10 from falling off between it and the lens edge 31.

[0074] In particular, in practical implementation, the specific shape of the lens 10 and the specific number of the pyroelectric infrared sensors 20 can be flexibly designed according to product needs, for example, in corresponding Figure 1 In the structure shown, the number of pyroelectric infrared sensors 20 is one.

[0075] It is worth mentioning that, referring to the accompanying drawings in the specification of this utility model... Figures 3A to 7 As shown, in a preferred embodiment of this utility model, the number of pyroelectric infrared sensors 20 is multiple, and the lens 10 can form a partition for each of the pyroelectric infrared sensors 20, simplifying the structure of the waterproof infrared detection device 100. Furthermore, the lens 10 is also suitable for not affecting the normal operation of the pyroelectric infrared sensors 20 when support components and / or control components are provided, which is beneficial to the miniaturization of the waterproof infrared detection device 100 and to ensuring the strength of the lens 10 while achieving the thinning of the lens 10.

[0076] Corresponding reference Figures 3A to 3D As shown, some of the principle structures of the lens 10 are illustrated. The lens 10 includes a central lens region and a wide-angle lens region 113 arranged around the central lens region. An isolation region 12 is provided in the middle of the central lens region. The isolation region 12 has at least three isolation strips 121 extending toward the edge of the central lens region. A lens distribution region 11 is formed between two adjacent isolation strips 121 in the central lens region, thereby forming at least three circumferentially spaced lens distribution regions 11. Based on the at least three circumferentially spaced lens distribution regions 11, each is responsible for the circumferential horizontal field of view, achieving 360° horizontal field of view coverage. Based on the interval of each lens distribution region 11, the pyroelectric infrared sensor 20 can be partitioned and isolated, which helps to avoid mutual interference of the pyroelectric infrared sensor 20 and simplifies the process.

[0077] Specifically, the lens distribution area 11 is formed by an array of multiple lens units, wherein each lens unit of the same lens distribution area 11 is matched with the same pyroelectric infrared sensor 20 to form a matching relationship between the lens distribution area 11 and the pyroelectric infrared sensor 20. Different lens distribution areas 11 are matched with different pyroelectric infrared sensors 20, wherein each pyroelectric infrared sensor 20 is arranged with its back to the lens distribution area 11 and tilted, with its sensing surface facing the lens distribution area 11. Thus, based on the spacing of each lens distribution area 11 by the isolation area 12, the pyroelectric infrared sensors 20 are partitioned and isolated, which helps to avoid mutual interference between the pyroelectric infrared sensors 20 and eliminates the need to set corresponding compartment structures in the housing 30, thereby simplifying the process.

[0078] It is worth mentioning that the back-facing arrangement of each pyroelectric infrared sensor 20 means that each pyroelectric infrared sensor 20 is arranged with its sensing surface facing the center of the waterproof infrared detection device 100, so that the area formed between each pyroelectric infrared sensor 20 will not transmit / accumulate infrared light.

[0079] In particular, since the isolation area 12 serves as the isolation area for each lens unit and can provide strength support for the lens 10, the lens unit can be designed to be thinner, thereby improving the corresponding detection sensitivity and resolution.

[0080] Furthermore, this invention can form a 150° wide-angle field of view coverage in the lateral direction. Specifically, the central lens area is designed to have a bottom lens area 111 and a middle lens area 112 disposed around and inclined to the bottom lens area 111. The wide-angle lens area 113 is inclined to the bottom lens area 111 and is farther away from the bottom lens area 111 relative to the middle lens area 112. Figures 3B to 3D As shown, each of the pyroelectric infrared sensors 20 is tilted and its sensing surface faces the lens distribution area 11.

[0081] Where corresponding to Figure 3C The isolation strip 121 extends to the edge of the bottom lens area 111 to separate a plurality of lens distribution areas 11 in the central lens area. Corresponding to Figure 3B and Figure 3D The isolation strip extends to the outer edge of the wide-angle lens area 113 to divide the wide-angle lens area into at least three far-field lens distribution areas, each far-field lens distribution area comprising an array of multiple lens units, wherein the far-field lens distribution area and its radially adjacent lens distribution area 11 together form a lens distribution area 11 and are matched with the same pyroelectric infrared sensor 20.

[0082] It is worth mentioning that, corresponding to Figure 3C As shown, the wide-angle lens area 113 is connected to the central lens area. Specifically, with the orientation of the light-gathering surface of the bottom lens area 111 as the bottom direction, the lower end of the wide-angle lens area 113 is connected to the upper end of the central lens area 112.

[0083] Preferably, in this invention, the lens 10 adopts a staggered segmented design, specifically, corresponding to Figure 3B and Figure 3CWith the orientation of the light-gathering surface of the bottom lens area 111 as the bottom direction, the upper ends of the middle lens area 112 and the wide-angle lens area 113 are farther away from the center of the central lens area relative to their lower ends. The upper ends of the middle lens area 112 and the wide-angle lens area 113 are farther away from the center of the central lens area relative to the edge of the bottom lens area 111. The lens 10 includes a junction 114 connecting the central lens area and the wide-angle lens area 113. The junction 114 connects the lower end of the wide-angle lens area 113 and the upper end of the central lens area 112. This forms a staggered segmentation of the wide-angle lens area 113 with the middle lens area 112 and the bottom lens area 113, so as to balance the requirements of large light-gathering area and small volume based on the staggered segmentation design of the lens distribution area 11.

[0084] Corresponding to Figures 5 to 6B As shown, based on the partition design of the bottom lens area 111, the middle lens area 112 and the wide-angle lens area 113, the field of view distribution corresponding to the near, middle and far areas on one side is illustrated. Taking a 2.5m high ceiling installation as an example, a tangential detection radius of 15m and a radial detection radius of greater than or equal to 4m can be achieved.

[0085] In particular, in this embodiment of the present invention, the number of isolation strips 121 is four, and the four isolation strips 121 are evenly spaced around the circumference to separate four lens distribution areas 11, so as to achieve coverage of the horizontal 360° field of view based on the circumferential surrounding of the lens distribution areas 11.

[0086] It is worth mentioning that the bottom lens area 111, the middle lens area 112 and the wide-angle lens area 113 are lens groups formed by an array of multiple lens units. The number / density of the lenses in the bottom lens area 111, the middle lens area 112 and the wide-angle lens area 113 gradually increases from the inside to the outside, which is beneficial to improving the uniformity and consistency of the sensitivity of the coverage area.

[0087] Furthermore, since the isolation region 12 serves as the isolation region for each lens unit and can provide strength support for the lens 10, the lens unit can be designed to be thinner, thereby improving the corresponding detection sensitivity and resolution.

[0088] refer to Figure 4As shown, the isolation area 12 serves as a separation area between lens units and is an empty area that does not require the function of transmitting / focusing infrared light. Therefore, it can be used to embed and install the control component 60 of the waterproof infrared detection device 100, such as, but not limited to, potentiometers, switches, buttons, light sensors, infrared receivers, temperature sensors, etc. Thus, the isolation area 12 can serve as a control and adjustment area for setting the control component 60. There is no need to set the corresponding control component mounting area on the housing 20 of the waterproof infrared detection device 100, which is conducive to the miniaturization of the waterproof infrared detection device 100. Furthermore, the detection surface of the waterproof infrared detection device 100 can be set to only the lens 10, which is conducive to improving the aesthetics of the waterproof infrared detection device 100. Since each of the pyroelectric infrared sensors 20 is tilted within the internal space of the housing 30 and its sensing surface faces the lens distribution area 11, it can achieve a 360° horizontal field of view coverage. On the other hand, with the isolation area 12 serving as the control and adjustment area of ​​the control component 60, the setting of the control component 60 will not obstruct the infrared rays radiated by the human body from reaching the corresponding pyroelectric infrared sensor 20 through each lens area.

[0089] Specifically, in this embodiment of the present invention, the waterproof infrared detection device 100 is provided with a potentiometer 61, such as... Figure 7 As shown, the potentiometer 61 is disposed in the internal space of the housing 20 and extends to the isolation area 12 of the lens 10 through the adjustment knob 62 of the potentiometer 61. The isolation area 12 has a knob hole for arranging the adjustment knob 62, so that the waterproof infrared detection device 100 does not need to set an additional installation area for the potentiometer 61, and the operation of the potentiometer 61 is located on the front of the waterproof infrared detection device 100, which is convenient for the user to set parameters.

[0090] It is worth mentioning that the waterproof infrared detection device 100 is equipped with a temperature sensor 63, which is located in the isolation area 12 of the lens 10. The contact between the temperature sensor 63 and the lens 10 improves the accuracy of temperature detection, thereby improving the temperature compensation accuracy of the waterproof infrared detection device 100. Therefore, based on the accurate temperature compensation setting, the waterproof infrared detection device 100 can be applied to ultra-low temperature environments such as cold storage.

[0091] Furthermore, the waterproof infrared detection device 100 includes a support column 50, one end of which abuts against the isolation area 12 of the lens 10, and the other end is installed in the internal space of the housing 30 to form a support for the lens 10. Thus, the isolation area 12 is also the support area of ​​the lens 10, and the arrangement of the support column 50 will not obstruct the infrared rays radiated by the human body from reaching the corresponding pyroelectric infrared sensor 20 through each lens area.

[0092] Preferably, the support column 50 is supported at the physical center point of the isolation area 12, which can effectively prevent the lens 10 from being dented or deformed by compression, collision, etc., and ensure the structural stability of the lens 10. Each of the pyroelectric infrared sensors 20 is arranged around the support column 50 with its back to the support column 50, thereby forming a structural form in which each of the pyroelectric infrared sensors 20 is arranged with its back to the support column 50.

[0093] It is worth mentioning that, in this embodiment of the present invention, the temperature sensor 63 is disposed at one end of the support column 50 so that the temperature sensor 63 is in contact with the lens 10 based on the support of the support column 50.

[0094] Preferably, the support column 50 is configured as a hollow column, thereby facilitating the routing of the temperature sensor 63 within the support column 50 and its connection to a corresponding circuit disposed within the internal space of the housing 30. See details. Figure 12A and Figure 12B As shown, the waterproof infrared detection device 100 includes a cable 631 electrically connected to the temperature sensor 63 and a mounting slot 632 for limiting the temperature sensor 63. One end of the cable 631 is electrically connected to the temperature sensor 63 and runs through the hollow support column 50, while the other end is electrically connected to a corresponding circuit inside the housing 30. The mounting slot 632 inserts the temperature sensor 63 from the side, limiting the temperature sensor 63 and preventing it from detaching from the support column 50. This provides support for the lens 10 and also supports the temperature sensor 63 in contact with the lens 10, improving the accuracy of temperature detection and preventing obstruction of the pyroelectric infrared sensor 20. Furthermore, the cable 631's route through the inside of the support column 50 also avoids obstructing the pyroelectric infrared sensor 20 and contributes to the structural simplicity of the waterproof infrared detection device 100.

[0095] It is worth mentioning that in some embodiments of this utility model, the temperature sensor 63 may also be located in other areas, such as the area where the potentiometer 61 is located, and this utility model does not limit this.

[0096] Specifically, this invention achieves partitioning of the lenses 10 by forming isolation between each lens distribution area 11 based on the isolation area 12, and each pyroelectric infrared sensor 20 corresponds to one lens distribution area 11. Therefore, the housing 30 does not need to be designed with compartments for each pyroelectric infrared sensor 20, which helps to simplify the structure of the housing 30 and facilitates the production and debugging of the waterproof infrared detection device 100.

[0097] Further, refer to Figure 7 As shown, in practical applications, the isolation area 12 is provided with reinforcing ribs 122, which can form a strong support for each of the lens distribution areas 11, so that the lens units of each of the lens distribution areas 11 can be designed to be thinner. Specifically, in this embodiment of the present invention, the thickness of the lens unit can be set to 0.7mm, which is beneficial to improving the sensitivity of the infrared detection device.

[0098] It is understood that the lens unit can be a convex lens, a Fresnel lens, or a lens formed by further designing a Fresnel lens based on a corresponding texture, and the focal length and structure of each lens unit are not limited to the same.

[0099] In particular, in this embodiment of the present invention, the lens distribution area 11 and the isolation area 12 are designed as an integrated unit, and the lens distribution area 11 is formed based on the corresponding texture design, which is beneficial to improve the strength support of the isolation area 12 for the lens distribution area 11 based on the integrated design.

[0100] It is also understood that the light-gathering surface of each of the lens distribution areas 11 can have various shapes, and this utility model does not impose any limitations on this. The light-gathering surface of each of the lens distribution areas 11 can be a plane or a curved surface.

[0101] It is worth mentioning that the isolation area 12 refers to the area where infrared rays cannot be focused on the corresponding pyroelectric infrared sensor 20 based on the isolation area 12. The isolation area 12 can be the area formed when the lens unit is not provided on the lens 10, or it can be the area that cannot be focused on infrared rays based on the frosting and / or light-blocking treatment on the basis of the corresponding lens unit. This utility model does not limit this.

[0102] Further, refer to Figure 8As shown, the waterproof infrared detection device 100 may optionally be further provided with a shielding cover 70, wherein the shielding cover 70 is covered below the lens window 301, and the shape of the shielding cover 70 is designed to form a partitioned shielding of the light-gathering angle of the lens 10, so as to flexibly adjust the partitioned detection of the waterproof infrared detection device 100. Specifically, the shielding cover 70 includes a mounting buckle 71, and the limiting edge of the limiting ring 40 has a mounting opening 43 that matches the mounting buckle 71. The shielding cover 70 is installed on the limiting ring 40 and covers the underside of the lens window 301 with the mounting buckle 71 inserted into the mounting opening 43.

[0103] The shielding cover 70 includes multiple shielding pieces. The connected shielding pieces and the connection area between the shielding pieces and the shielding cover 70 are preset fracture areas. The preset fracture area is a connection structure that achieves controllable fracture by local thinning and / or perforation. This is suitable for adjusting the shielding angle of the shielding cover 70 on the lens 10 by peeling off the shielding pieces, thereby meeting different detection area distribution requirements.

[0104] It is worth mentioning that, in addition to being set according to the natural color of the lens main material, in some embodiments of the present invention, the lens 10 may also be set to the same color as the housing 30. For example, when the housing 30 is white, the lens 10 is white by incorporating relevant color powder / pigment into the lens main material. In this way, the aesthetics and concealment of the waterproof infrared detection device 100 are improved by the feature that the lens 10 and the housing 30 are the same color.

[0105] Specifically, in practical implementation, the waterproof infrared detection device 100 is adapted to be configured into different installation styles, corresponding to, for example... Figure 9A As shown, the housing 30 is fitted with a ceiling-mount fitting 210, which is adapted for recessed installation into a mounting hole in the corresponding ceiling; corresponding to... Figure 9B As shown, the housing 30 is fitted with a cover 220; corresponding to... Figure 9C As shown, the housing 30 is fitted with a surface-mounted base box 230, suitable for surface mounting on walls, ceilings, and other areas; corresponding to... Figure 9D As shown, the housing 30 is equipped with an 86-type junction box 240, which is suitable for installation in a standard junction box. It is understood that, based on the needs of the installation scene box / or product design, 118-type junction boxes, 120-type junction boxes, etc. can also be selected. This utility model does not limit this.

[0106] It is worth mentioning that, depending on the wiring requirements / specifications, the waterproof infrared detection device 100 can also be configured in different styles during specific implementations, such as... Figure 10A The waterproof infrared detection device 100 of the high-voltage type is illustrated, as shown in the figure. Figure 10B The waterproof infrared detection device 100 of the KNX model is illustrated.

[0107] Furthermore, referring to the accompanying drawings in the specification of this utility model... Figure 11A and Figure 11B As shown, the waterproof infrared detection device 100 is implemented in a high-mounted configuration, and the water-blocking seal is achieved based on the interference fit between the lens 10 and the housing 30. This effectively avoids the impact on waterproof performance caused by heat generation during device operation and / or aging of the colloid due to outdoor wind and sun exposure, which helps to ensure the working stability of the high-mounted waterproof infrared detection device 100.

[0108] In other words, as disclosed in this utility model, the waterproof infrared detection device 100 can be adapted to be implemented in different styles to meet the corresponding style requirements.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0110] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A waterproof infrared detection device, characterized in that, include: A housing, wherein the housing has a mirror window communicating with an internal space and an external space of the housing and a mirror edge defining the mirror window; A lens, wherein the lens has a mounting edge, and the lens is mounted on the lens window in a state where the mounting edge is interference-fitted to the lens edge; and At least one pyroelectric infrared sensor, wherein the pyroelectric infrared sensor is disposed in the interior space of the housing with its sensing surface facing the cloth window.

2. The waterproof infrared detection device according to claim 1, wherein the lens is mounted on the outer surface of the lens edge and is interference-fitted with the lens edge.

3. The waterproof infrared detection device according to claim 1, wherein the lens is disposed on the lens edge in a state of being nested within the inner surface of the lens edge and is interference-fitted with the lens edge.

4. The waterproof infrared detection device according to claim 2, wherein the waterproof infrared detection device includes a limiting ring, wherein one end of the limiting ring is installed on the housing, and the other end is pressed against the mounting edge of the lens in the direction of the housing to form an anti-detachment limiting between the lens and the mounting edge.

5. The waterproof infrared detection device according to claim 4, wherein the limiting ring includes a retaining ring and a limiting edge extending inwardly from the inner wall of the retaining ring, wherein the limiting ring is detachably fixed to the outer surface of the housing by the retaining ring, and in the state where the retaining ring is fitted on the outer surface of the housing, the limiting edge is fitted on the outer surface of the fitting edge to press the fitting edge toward the housing and thereby clamp the fitting edge with the fabric edge.

6. The waterproof infrared detection device according to claim 5, wherein the sleeve extends outward from its outer surface with an outwardly projecting edge, wherein when the retaining ring is fitted onto the outer surface of the housing, the outwardly projecting edge abuts against the upper surface of the limiting edge.

7. The waterproof infrared detection device according to claim 6, wherein the housing and the retaining ring have a mutually matching snap-fit ​​structure, wherein the retaining ring is snap-fitted and installed on the housing based on the snap-fit ​​structure.

8. The waterproof infrared detection device according to claim 7, wherein the snap-fit ​​structure includes a snap-fit ​​position disposed on the housing and a snap fastener disposed on the snap ring, wherein the snap-fit ​​position protrudes and extends from the outer surface of the housing so that, in the state where the snap fastener is snapped into the snap-fit ​​position, the inner surface of the snap ring and the outer surface of the housing below the snap-fit ​​position form a deformation gap.

9. The waterproof infrared detection device according to claim 5, wherein the waterproof infrared detection device further includes a shielding cover, wherein the shielding cover is used to shield the area below the lens window, and the shielding cover is designed to form a partitioned shielding of the light-gathering angle of the lens based on the shape of the shielding cover, wherein the shielding cover includes a mounting buckle, and the limiting edge is provided with a mounting opening that matches the mounting buckle, wherein the shielding cover is installed on the limiting ring and shields the area below the lens window with the mounting buckle inserted into the mounting opening.

10. The waterproof infrared detection device according to any one of claims 1 to 9, wherein the number of pyroelectric infrared sensors is plurality of, wherein the lens includes a central lens region and a wide-angle lens region disposed around the central lens region, wherein an isolation region is disposed in the middle of the central lens region, the isolation region having at least three isolation bands extending toward the edge of the central lens region, the central lens region forming a lens distribution region between two adjacent isolation bands, wherein each lens distribution region includes a plurality of lens units arranged in an array, wherein each lens unit of the same lens distribution region is matched with the same pyroelectric infrared sensor to form a matching relationship between the lens distribution region and the pyroelectric infrared sensor, different lens distribution regions are matched with different pyroelectric infrared sensors, wherein each pyroelectric infrared sensor is disposed facing away from and tilted, with its sensing surface facing the lens distribution region.

11. The waterproof infrared detection device according to claim 10, wherein the isolation strip extends to the outer edge of the wide-angle lens area to divide the wide-angle lens area into at least three far-field lens distribution areas, the far-field lens distribution areas comprising a plurality of lens units arranged in an array, wherein the far-field lens distribution area and its radially adjacent lens distribution area are matched with the same pyroelectric infrared sensor.

12. The waterproof infrared detection device according to claim 10, wherein the waterproof infrared detection device includes a control component, wherein one end of the control component is disposed in the isolation area of ​​the lens, and the other end is connected to a corresponding circuit structure in the internal space of the housing.

13. The waterproof infrared detection device according to claim 12, wherein the waterproof infrared detection device includes a support column, wherein one end of the support column abuts against the isolation area of ​​the lens, and the other end is installed in the internal space of the housing to form support for the lens.

14. The waterproof infrared detection device according to claim 13, wherein the control component includes a temperature sensor and at least one potentiometer, wherein the temperature sensor is disposed in the isolation area of ​​the lens, the potentiometer is disposed in the internal space of the housing and extends to the isolation area, wherein the temperature sensor is disposed at one end of the support column, and the support column is configured as a hollow column, wherein the waterproof infrared detection device includes a ribbon cable, wherein one end of the ribbon cable is electrically connected to the temperature sensor and runs through the interior of the hollow support column, and the other end is electrically connected to a corresponding circuit in the internal space of the housing.

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