Wide-angle lens for infrared detection and infrared detection device

Abstract

The utility model provides a kind of infrared wide-angle lens and infrared detection device, wherein the infrared wide-angle lens includes at least three lens distribution areas of circumferential interval distribution and the isolation area of connecting each lens distribution area, based on the circumferential distribution of at least three lens distribution areas is responsible for the horizontal field of view of circumferential, realize the coverage of horizontal 360 ° field of view, and based on the interval of each lens distribution area can realize the partition isolation of corresponding pyroelectric infrared sensor, simultaneously it is also suitable for arranging support component in the isolation area and the corresponding control component of the infrared detection device, it is favorable to promote the structural strength of the infrared wide-angle lens and the miniaturization design of the infrared detection device.

Description

Technical Field

[0001] This utility model relates to the field of infrared detection, and in particular to a wide-angle lens and an infrared detection device for infrared detection. 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 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 and a pyroelectric infrared sensor. 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 pyroelectric infrared sensor is positioned facing the Fresnel lens on the side opposite the light-receiving surface. Generally, traditional infrared detection devices are equipped with one pyroelectric infrared sensor. To meet multi-angle detection requirements, existing infrared detection devices also use multiple pyroelectric infrared sensors for multi-angle detection. Therefore, during production, multiple pyroelectric infrared sensors need to be installed and debugged in multiple locations, and corresponding isolation needs need to be set for each pyroelectric infrared sensor, resulting in a complex production process.

[0004] Meanwhile, in existing infrared detection devices, to ensure the structural strength of the Fresnel lens, it is usually necessary to have a relatively thick Fresnel lens, which inevitably affects the sensitivity of the infrared detection device. Furthermore, due to the need for parameter adjustment and other functions of the detection device, many infrared detection devices also require an additional potentiometer on the detection surface. Since the potentiometer must be placed outside the Fresnel lens to avoid interfering with the operation of the pyroelectric infrared sensor, this inevitably increases the size of the infrared detection device. Utility Model Content

[0005] One objective of this invention is to provide a wide-angle lens for infrared detection and an infrared detection device, wherein the wide-angle lens for infrared detection is applied to the infrared detection device of a multi-pyroelectric infrared sensor and can form partitions for each detection direction, which helps to simplify the structure of the infrared detection device.

[0006] Another objective of this invention is to provide a wide-angle lens for infrared detection and an infrared detection device, wherein the wide-angle lens for infrared detection can operate normally without affecting the pyroelectric infrared sensor even when a support component and / or control component are provided, which is beneficial for miniaturizing the infrared detection device and ensuring the structural strength of the wide-angle lens for infrared detection while achieving thinning of the lens.

[0007] Another objective of this invention is to provide a wide-angle lens for infrared detection and an infrared detection device. The wide-angle lens for infrared detection includes a central lens region and a wide-angle lens region surrounding the central lens region. An isolation region is provided in the middle of the central lens region. The isolation region has at least three isolation bands extending toward the edge of the central lens region. A lens distribution region is formed between two adjacent isolation bands in the central lens region, thereby forming at least three circumferentially spaced lens distribution regions. Based on the at least three circumferentially spaced lens distribution regions, each is responsible for the circumferential horizontal field of view, achieving 360° horizontal field of view coverage. Furthermore, based on the spacing of each lens distribution region by the isolation region, the corresponding pyroelectric infrared sensors can be isolated, which helps to avoid mutual interference between pyroelectric infrared sensors and simplifies the process.

[0008] Another objective of this invention is to provide a wide-angle lens for infrared detection and an infrared detection device, wherein each lens unit in the same lens distribution area is matched with the mounting position of the same pyroelectric infrared sensor to form a matching relationship between the lens distribution area and the mounting position. Different lens distribution areas are matched with different mounting positions of pyroelectric infrared sensors. The isolation area, as the isolation area of ​​each lens unit, can form a strong support for the wide-angle lens for infrared detection, so the lens unit can be designed to be thinner, thereby improving the corresponding detection sensitivity and resolution.

[0009] Another objective of this invention is to provide a wide-angle lens for infrared detection and an infrared detection device, wherein the isolation area serves as the isolation area for each lens unit. Therefore, support components such as support columns can be directly installed on the isolation area, which improves the structural strength of the wide-angle lens for infrared detection without affecting the performance of the wide-angle lens for infrared detection and the infrared detection device. This effectively prevents the wide-angle lens for infrared detection from being dented or deformed by compression or collision, ensuring the structural stability of the wide-angle lens for infrared detection, and allowing the lens units in the lens distribution area to be designed to be thinner.

[0010] Another objective of this invention is to provide a wide-angle lens for infrared detection and an infrared detection device. The isolation area serves as the isolation area for each lens unit, and can therefore be used to embed and install control components of the infrared detection device, such as, but not limited to, potentiometers, switches, buttons, light sensors, infrared receivers, temperature sensors, etc. Therefore, there is no need to set up a mounting area for the corresponding control components on the housing of the infrared detection device, which is beneficial for miniaturizing the infrared detection device. Furthermore, the detection surface of the infrared detection device can be set to contain only the wide-angle lens for infrared detection, which is beneficial for improving the aesthetics of the infrared detection device.

[0011] Another objective of this invention is to provide a wide-angle lens and an infrared detection device for infrared detection, 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. Each far-field lens distribution area includes multiple lens units arranged in an array. The far-field lens distribution area and its radially adjacent lens distribution area are matched with the same mounting position of a pyroelectric infrared sensor. The number / density of lens units in each lens distribution area gradually increases from the inside out, which is beneficial to improving the uniformity and consistency of the infrared detection device's sensitivity to the coverage area.

[0012] Another objective of this invention is to provide a wide-angle lens and an infrared detection device for infrared detection, wherein the central lens area is designed to have a bottom lens area and a middle lens area disposed around and inclined to the bottom lens area, wherein the orientation of the light-gathering surface of the bottom lens area is taken as the bottom direction, the upper ends of the middle lens area and the wide-angle lens area are farther away from the center of the central lens area relative to their lower ends, and the lower end of the wide-angle lens area is farther away from the center of the central lens area relative to the upper end of the middle lens area, so as to take into account both the requirements of large light-gathering area and small volume based on the staggered segment design of the lens distribution area.

[0013] According to one aspect of the present invention, a wide-angle lens for infrared detection is provided, wherein the wide-angle lens for infrared detection 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 mounting position of the same pyroelectric infrared sensor to form a matching relationship between the lens distribution region and the mounting position, and different lens distribution regions are matched with different mounting positions of pyroelectric infrared sensors.

[0014] In one embodiment, 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, 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 are matched to the same mounting position of the pyroelectric infrared sensor.

[0015] In one embodiment, the central lens region is designed to have a bottom lens region and a middle lens region disposed around and inclined to the bottom lens region, wherein with the orientation of the light-gathering surface of the bottom lens region as the bottom direction, the upper ends of the middle lens region and the wide-angle lens region are farther away from the center of the central lens region relative to their lower ends, the upper ends of the middle lens region and the upper ends of the wide-angle lens region are farther away from the center of the central lens region relative to the edge of the bottom lens region, the lower end of the wide-angle lens region is farther away from the center of the central lens region relative to the upper end of the middle lens region, and the junction connects the lower end of the wide-angle lens region and the upper end of the central lens region.

[0016] In one embodiment, the infrared detection wide-angle lens includes a junction connecting the central lens region and the wide-angle lens region, the junction connecting the lower end of the wide-angle lens region and the upper end of the central lens region.

[0017] In one embodiment, the lower end of the wide-angle lens region is connected to the upper end of the central lens region.

[0018] In one embodiment, the number / density of lenses in the bottom lens area, the middle lens area, and the wide-angle lens area increases from the inside out.

[0019] In one embodiment, each of the isolation strips is provided with a reinforcing rib.

[0020] In one embodiment, the number of isolation strips is four, and the four isolation strips are evenly spaced circumferentially.

[0021] According to another aspect of the present invention, an infrared detection device is provided, wherein the infrared detection device comprises:

[0022] The wide-angle lens for infrared detection as described above;

[0023] A housing having a lens window connecting an internal space and an external space, wherein a wide-angle infrared detection lens is mounted on the lens window; and

[0024] A pyroelectric infrared sensor corresponding to the number of lens distribution areas, wherein each of the pyroelectric infrared sensors is disposed facing away from and at an angle within the interior space of the housing, with its sensing surface facing the lens distribution area.

[0025] In one embodiment, the infrared detection device includes a control component, one end of which is disposed in the isolation area of ​​the infrared detection wide-angle lens, and the other end is connected to a corresponding circuit structure in the internal space of the housing.

[0026] In one embodiment, the control component includes at least one potentiometer disposed within the interior space of the housing and extending into the isolation zone.

[0027] In one embodiment, the infrared detection device includes a support column, one end of which abuts against the isolation area of ​​the infrared detection wide-angle lens, and the other end is installed in the internal space of the housing to form support for the infrared detection wide-angle lens.

[0028] In one embodiment, the control component includes a temperature sensor, wherein the temperature sensor is disposed in the isolation area of ​​the infrared detection wide-angle lens.

[0029] In one embodiment, the temperature sensor is disposed at one end of the support column, and the support column is configured as a hollow column. The infrared detection device includes a ribbon cable, one end of which 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 interior space of the housing.

[0030] In one embodiment, the support column is supported at the physical center point of the isolation zone, and each of the pyroelectric infrared sensors is arranged around the support column.

[0031] The further objectives and advantages of this invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram illustrating the principle structure of a wide-angle lens for infrared detection according to an embodiment of the present invention.

[0033] Figure 2 This is a cross-sectional schematic diagram of the infrared detection wide-angle lens according to the above embodiments of the present invention.

[0034] Figure 3 This is a cross-sectional schematic diagram of the infrared detection wide-angle lens according to the above embodiments of the present invention.

[0035] Figure 4 This is a schematic diagram illustrating the principle structure of the wide-angle infrared detection lens according to the above embodiments of this utility model.

[0036] Figure 5 A schematic diagram showing the field of view distribution of the corresponding infrared detection device with one side facing upwards, based on the partition design of the wide-angle lens for infrared detection.

[0037] Figure 6 This is a schematic diagram of the structure of an infrared detection device using the infrared detection wide-angle lens according to the above embodiments of the present invention.

[0038] Figure 7 This is an exploded structural diagram of the infrared detection device according to the above embodiments of the present invention.

[0039] Figure 8 This is a schematic diagram of the structure of the wide-angle lens for infrared detection according to the above embodiments of the present invention when applied to the infrared detection device.

[0040] Figure 9 This is a schematic diagram showing the structure of the infrared detection device according to the above embodiments of the present invention further provided with a shielding cover.

[0041] Figure 10A This is a schematic diagram of a modified structure of the infrared detection device according to the above embodiment of the present invention.

[0042] Figure 10B This is a cross-sectional schematic diagram of the modified structure of the infrared detection device according to the above embodiment of the present invention. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Refer to the accompanying drawings in the specification of this utility model. Figures 1 to 9 As shown, the structure of an infrared detection wide-angle lens and an infrared detection device using the infrared detection wide-angle lens according to an embodiment of the present invention are illustrated. The infrared detection wide-angle lens 10 includes a central lens region and a wide-angle lens region 113 surrounding the central lens region. An isolation region 12 is provided in the center 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 a circumferential horizontal field of view, achieving 360° horizontal field of view coverage. Furthermore, the spacing between each lens distribution region 11 enables partitioned isolation of corresponding pyroelectric infrared sensors, which helps avoid mutual interference between pyroelectric infrared sensors and simplifies the process.

[0047] It is worth mentioning that 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 mounting position of the pyroelectric infrared sensor 20 to form a matching relationship between the lens distribution area 11 and the mounting position. Different lens distribution areas 11 are matched with different mounting positions of the pyroelectric infrared sensors 20. The spacing of the isolation area 12 between each lens distribution area 11 can realize the partition isolation of the corresponding pyroelectric infrared sensors, which helps to avoid mutual interference between pyroelectric infrared sensors and simplify the process.

[0048] In particular, since the isolation region 12 serves as the isolation region for each lens unit and can provide strong support for the wide-angle lens 10 for infrared detection, the lens unit can be designed to be thinner, thereby improving the corresponding detection sensitivity and resolution.

[0049] 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 2 to 4 As shown, each of the pyroelectric infrared sensors 20 is tilted and its sensing surface faces the lens distribution area 11.

[0050] Where corresponding to Figure 2 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 3 and Figure 4 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. The far-field lens distribution area includes multiple lens units arranged in an array. 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 mounting position of the pyroelectric infrared sensor.

[0051] It is worth mentioning that, corresponding to Figure 3 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.

[0052] Preferably, in this invention, the wide-angle lens 10 for infrared detection adopts a staggered segmented design, specifically, corresponding to... Figure 2 and Figure 4The orientation of the light-gathering surface of the bottom lens area 111 is taken as the bottom direction. The upper ends of the middle lens area 112 and the wide-angle lens area 113 are far away from the middle 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 far away from the middle of the central lens area relative to the edge of the bottom lens area 111. The infrared detection wide-angle 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 take into account both the large light-gathering area requirement and the small volume requirement based on the staggered segmentation design of the lens distribution area 11.

[0053] Corresponding to Figure 5 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.

[0054] 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.

[0055] 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.

[0056] Furthermore, since the isolation region 12 serves as the isolation region for each lens unit and can provide strong support for the infrared detection wide-angle lens 10, the lens unit can be designed to be thinner, thereby improving the corresponding detection sensitivity and resolution.

[0057] Specifically, refer to Figure 7As 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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 by not setting the lens unit on the infrared detection wide-angle 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.

[0062] Furthermore, the isolation area 12 serves as the isolation area for each lens unit. Supporting components such as support columns can be directly installed on the isolation area 12 without obstructing the corresponding pyroelectric infrared sensor. This improves the structural strength of the infrared detection wide-angle lens 10 without affecting the performance of the infrared detection device, i.e., it does not obstruct the pyroelectric infrared sensor 20. The structural reinforcement effectively prevents the infrared detection wide-angle lens 10 from being dented or deformed by compression or collision, ensuring the structural stability of the infrared detection wide-angle lens 10 and allowing the lens units in the lens distribution area 11 to be designed to be thinner.

[0063] Specifically, refer to Figures 6 to 9As shown, the infrared detection device 100 includes the infrared detection wide-angle lens 10, a housing 30, and at least three pyroelectric infrared sensors 20, the number of which is the same as the number of lens distribution areas 11 of the infrared detection wide-angle lens 10. The housing 30 has a lens window 301 that connects the internal space and the external space of the housing 30. The infrared detection wide-angle lens 10 is mounted on the lens window 301. Each of the pyroelectric infrared sensors 20 is arranged facing away from and at an angle in the internal space of the housing 30, with its sensing surface facing the lens distribution area 11.

[0064] 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 infrared detection device 100, so that the area formed between each pyroelectric infrared sensor 20 will not transmit / accumulate infrared light.

[0065] Furthermore, 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 40 of the 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 40. There is no need to set the corresponding control component mounting area on the housing 20 of the infrared detection device 100, which is conducive to miniaturization of the infrared detection device 100. Moreover, the detection surface of the infrared detection device 100 can be set to only the wide-angle lens 10 for infrared detection, which is conducive to improving the aesthetics of the 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 40, the setting of the control component 40 will not obstruct the infrared rays radiated by the human body from reaching the corresponding pyroelectric infrared sensor 20 through each lens area.

[0066] Specifically, in this embodiment of the present invention, the infrared detection device 100 is provided with a potentiometer 41 and a temperature sensor 42. The potentiometer 41 is disposed in the internal space of the housing 20 and extends to the isolation area 12 of the infrared detection wide-angle lens 10, so that the infrared detection device 100 does not need to be provided with an additional installation area for the potentiometer 41, and the operation of the potentiometer 41 is located on the front of the infrared detection device 100, which is convenient for the user to set parameters.

[0067] It is worth mentioning that the temperature sensor 42 is disposed in the isolation area 12 of the infrared detection wide-angle lens 10, thereby improving the accuracy of temperature detection through the contact between the temperature sensor 42 and the infrared detection wide-angle lens 10, which in turn helps to improve the temperature compensation accuracy of the infrared detection device 100. Therefore, based on the accurate temperature compensation setting, the infrared detection device 100 can be applied to ultra-low temperature environments such as cold storage.

[0068] Furthermore, the infrared detection device 100 includes a support column 50, one end of which abuts against the isolation area 12 of the infrared detection wide-angle lens 10, and the other end is installed in the internal space of the housing 30 to form support for the infrared detection wide-angle lens 10. The isolation area 12 is also the support area of ​​the infrared detection wide-angle 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.

[0069] Preferably, the support column 50 is supported at the physical center point of the isolation area 12, which can effectively prevent the infrared detection wide-angle lens 10 from being dented or deformed by compression, collision, etc., and ensure the structural stability of the infrared detection wide-angle 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.

[0070] It is worth mentioning that, in this embodiment of the present invention, the temperature sensor 42 is disposed at one end of the support column 50 so that the temperature sensor 42 is in contact with the infrared detection wide-angle lens 10 based on the support of the support column 50.

[0071] Preferably, the support column 50 is configured as a hollow column, thereby facilitating the routing of the temperature sensor 42 within the support column 50 and its connection to a corresponding circuit disposed within the internal space of the housing 30. See details. Figure 10A and Figure 10BAs shown, the infrared detection device 100 includes a cable 421 electrically connected to the temperature sensor 42 and a mounting slot 422 for limiting the temperature sensor 42. One end of the cable 421 is electrically connected to the temperature sensor 42 and runs through the interior of the hollow support column 50, while the other end is electrically connected to a corresponding circuit inside the housing 30. The mounting slot 422 inserts the temperature sensor 42 from the side, limiting the temperature sensor 42 and preventing it from detaching from the support column 50. This provides support for the wide-angle lens 10 for infrared detection and also supports the temperature sensor 42 in contact with the wide-angle lens 10, improving the accuracy of temperature detection and avoiding obstruction of the pyroelectric infrared sensor 20. Furthermore, the cable 421's route through the interior of the support column 50 also avoids obstructing the pyroelectric infrared sensor 20 and contributes to the structural simplicity of the infrared detection device 100.

[0072] It is worth mentioning that in some embodiments of this utility model, the temperature sensor 42 may also be located in other areas, such as the area where the potentiometer 41 is located, and this utility model does not limit this.

[0073] Specifically, this invention achieves partitioning of the wide-angle lens 10 for infrared detection by isolating each of the lens distribution areas 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 compartmentalized for each pyroelectric infrared sensor 20, which helps to simplify the structure of the housing 30 and facilitates the production and debugging of the infrared detection device 100.

[0074] Further, refer to Figure 8 As shown, the infrared detection device 100 may optionally be further provided with a shielding cover 60, wherein the shielding cover 60 is located below the lens window 301, and the shape of the shielding cover 60 is designed to form a partitioned shielding of the light-gathering angle of the infrared detection wide-angle lens 10, so as to flexibly adjust the partitioned detection of the infrared detection device 100. The shielding cover 60 includes multiple shielding pieces, and the connection area between the connected shielding pieces and the shielding cover 60 is a preset fracture area. The preset fracture area is a connection structure that achieves controllable fracture by local thinning and / or perforation, so as to be suitable for adjusting the shielding of the shielding cover 60 on the light-gathering angle of the infrared detection wide-angle lens 10 by peeling off the shielding pieces, thereby meeting different detection area distribution requirements.

[0075] 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 infrared detection wide-angle lens 10 can also be set to the same color as the housing 30. For example, when the housing 30 is white, the infrared detection wide-angle lens 10 is white by incorporating relevant color powder / pigment into the lens main material. In this way, the aesthetics and concealment of the infrared detection device 100 are improved by the feature that the infrared detection wide-angle lens 10 and the housing 30 are the same color.

[0076] 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.

[0077] 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 function and structural principle of the present invention have been shown and explained in the embodiments. Without departing from the described principle, the implementation of the present invention may have any variations or modifications.

Claims

1. A wide-angle lens for infrared detection, characterized in that, The device includes a central lens region and a wide-angle lens region surrounding the central lens region. The central lens region has an isolation zone at its center, with at least three isolation bands extending toward the edge of the central lens region. The central lens region forms a lens distribution area between two adjacent isolation bands. Each lens distribution area includes multiple lens units arranged in an array. Each lens unit within the same lens distribution area is matched to the same mounting position of a pyroelectric infrared sensor, forming a matching relationship between the lens distribution area and the mounting position. Different lens distribution areas are matched to different mounting positions of pyroelectric infrared sensors.

2. The wide-angle lens for infrared detection according to claim 1, 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 area 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 to the same mounting position of the pyroelectric infrared sensor.

3. The infrared detection wide-angle lens according to claim 1 or 2, wherein the central lens region is designed to have a bottom lens region and a middle lens region disposed around and inclined to the bottom lens region, wherein with the orientation of the light-gathering surface of the bottom lens region as the bottom direction, the upper ends of the middle lens region and the wide-angle lens region are farther away from the center of the central lens region relative to their lower ends, and the lower end of the wide-angle lens region is farther away from the center of the central lens region relative to the upper end of the middle lens region.

4. The infrared detection wide-angle lens according to claim 3, wherein the infrared detection wide-angle lens includes a junction connecting the central lens area and the wide-angle lens area, the junction connecting the lower end of the wide-angle lens area and the upper end of the central lens area.

5. The wide-angle lens for infrared detection according to claim 3, wherein the lower end of the wide-angle lens area is connected to the upper end of the middle lens area.

6. The wide-angle lens for infrared detection according to claim 3, wherein the number / density of lenses in the bottom lens area, the middle lens area, and the wide-angle lens area increases from the inside out.

7. The wide-angle lens for infrared detection according to claim 3, wherein each of the isolation strips is provided with a reinforcing rib.

8. The wide-angle lens for infrared detection according to claim 1 or 2, wherein the number of isolation zones is four, and the four isolation zones are evenly spaced circumferentially.

9. An infrared detection device, characterized in that, include: Wide-angle lens for infrared detection as described in any one of claims 1 to 8; A housing having a lens window connecting an internal space and an external space, wherein a wide-angle infrared detection lens is mounted on the lens window; and A pyroelectric infrared sensor corresponding to the number of lens distribution areas, wherein each of the pyroelectric infrared sensors is disposed facing away from and at an angle within the interior space of the housing, with its sensing surface facing the lens distribution area.

10. The infrared detection device according to claim 9, wherein the infrared detection device includes a control component, wherein one end of the control component is disposed in the isolation area of ​​the wide-angle lens for infrared detection, and the other end is connected to a corresponding circuit structure in the internal space of the housing.

11. The infrared detection device according to claim 10, wherein the control component includes at least one potentiometer disposed in the interior space of the housing and extending to the isolation area.

12. The infrared detection device according to claim 10, wherein the infrared detection device includes a support column, wherein one end of the support column abuts against the isolation area of ​​the infrared detection wide-angle lens, and the other end is installed in the internal space of the housing to form support for the infrared detection wide-angle lens.

13. The infrared detection device according to claim 12, wherein the control component includes a temperature sensor, wherein the temperature sensor is disposed in the isolation area of ​​the wide-angle lens for infrared detection.

14. The infrared detection device according to claim 13, 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 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 interior space of the housing.

15. The infrared detection device according to claim 12, wherein the support column is supported at the physical center point of the isolation zone, and each of the pyroelectric infrared sensors is arranged around the support column.

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