Infrared detection device

Abstract

The utility model provides a kind of infrared detection device, wherein the infrared detection device includes a lens, a pyroelectric infrared sensor, a shell, a base and the blocking cap, wherein the bottom surface of the base is the mounting surface of the infrared detection device, the shell is movably adjusted to be arranged at the end of the base opposite to its bottom surface, the lens is arranged at the front of the shell, and the pyroelectric infrared sensor is accommodated in the shell and towards the lens, wherein the blocking cap is sleeved on the front of the shell and has a shielding piece that partially shields the lens, so that the lens generates a shielding zone based on the shielding of the shielding piece on the lens, and the field-of-view shielding space formed based on the shielding zone can be matched with the corresponding bed to make the infrared detection device suitable for human body wake-up detection.

Description

Technical Field

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

[0002] Among existing technologies for detecting human presence, image recognition, microwave detection, and passive infrared detection are three relatively mature technologies. Each has its strengths. For detecting human posture, image recognition excels in accuracy and adaptability to different environments. However, in private settings, especially sleeping environments, people do not want to be monitored by cameras, whether sleeping in a hotel, at home, or in a dormitory. Therefore, when the development of smart healthcare requires detecting when someone gets out of bed—for example, to intelligently control electrical devices based on the action of getting out of bed or sitting / lying down—microwave or passive infrared detection technologies are typically the only viable options.

[0003] While microwave detection technology has advanced to the point of being capable of imaging, the limitations of imaging radar, which demands high specifications in terms of size, power, computing power, and cost, make it unsuitable for smart homes. Furthermore, although radar imaging cannot clearly depict the human body's shape, its ability to clearly visualize human behavior is considered a violation of privacy. Therefore, when using microwave detection technology to detect when someone is getting up, the Doppler effect or dynamic ranging principle is typically employed to detect whether the person has produced a detectable amplitude / intensity of movement within the corresponding detection area. Specifically, a known feasible approach for detecting when someone is getting up involves utilizing the changes in spatial height of the person in a lying and unfolded position, determining when someone is getting up by performing layered detection across different spatial height ranges. However, implementing this technical approach typically requires deploying corresponding microwave detection devices at multiple installation locations based on the actual application scenario. The determination of when a person is awake is based on a combined analysis of the detection results from these multiple devices. Furthermore, since the beam angle of the microwave beam emitted by the product-type microwave detection device is fixed, this technical approach also requires selecting the appropriate microwave detection device based on the matching relationship between the actual application scenario and the corresponding beam angle. Therefore, this technical approach is not suitable for commercialization for detecting when a person is awake.

[0004] The principle of passive infrared detection technology is to divide the corresponding detection area into zones using a multi-window lens and detect the movement of a person across zones within the detection area using a pyroelectric infrared sensor (PIR). The multi-window lens of the corresponding infrared detection device has a lens array composed of multiple lens units, each of which has light-gathering characteristics similar to a convex lens. The pyroelectric infrared sensor is positioned with its sensing surface facing the multi-window lens. Based on the light-gathering principle of a convex lens, the sensing surface of the pyroelectric infrared sensor forms a corresponding field of view through any of the lens units, thus enabling the pyroelectric infrared sensor to form a corresponding number of fields of view through the lens array of the multi-window lens. For bed exit detection, a shielding design is required for the corresponding areas of the multi-window lens, so that the bed is surrounded by the fields of view corresponding to each lens unit to achieve bed exit detection. This requires specialized lens design. Furthermore, in practical applications, the size of the area surrounded by the field of view of the infrared detection device is affected by the installation height and is difficult to match with the size of the bed, easily affecting the actual user experience.

[0005] In conclusion, for applications requiring the detection of a person getting out of bed, including detecting whether a person has left the bed, there are currently no suitable commercially available solutions. Therefore, developing suitable commercial solutions for such applications is of significant technological and market value for intelligent care, especially age-friendly and child-friendly intelligent care. Summary of the Invention

[0006] One object of this invention is to provide an infrared detection device, wherein the infrared detection device is adapted to enable the detection of a human body leaving the bed based on the addition of accessories and / or the design of lenses.

[0007] Another objective of this invention is to provide an infrared detection device, wherein the infrared detection device includes a shielding cap, which is used to area shield the lens of the infrared detection device, and thus can be flexibly installed according to application requirements, which is beneficial to improving the flexibility of use of the infrared detection device.

[0008] Another objective of this invention is to provide an infrared detection device, wherein the infrared detection device adopts passive infrared detection technology and has the advantage of low energy consumption, thus being suitable for battery power supply and conducive to commercial promotion in the aftermarket.

[0009] Another objective of this utility model is to provide an infrared detection device, wherein the infrared detection device includes a lens, a pyroelectric infrared sensor, a housing, a base, and a shielding cap, wherein the bottom surface of the base serves as the mounting surface of the infrared detection device, the housing is movably and adjustably disposed at one end of the base opposite to its bottom surface, the housing includes a receiving cavity, an opening communicating with the receiving cavity, and an opening edge defining the opening, wherein the pyroelectric infrared sensor is disposed within the receiving cavity with its temperature-sensing surface facing the opening, the lens is disposed at the opening with its light-emitting surface facing the opening of the receiving cavity, and the shielding cap is adapted to be fitted onto the opening edge and has a shielding plate, thereby creating a shielding area for the lens by fitting the shielding cap onto the opening edge, achieving a matching setting between the field of view shielding space formed by the shielding area and the corresponding bed position, which is simple to debug and suitable for widespread application in human wake-up detection scenarios.

[0010] Another objective of this invention is to provide an infrared detection device, wherein, based on the addition of the shielding cap, the infrared detection device can block the lens to create a field-of-view shielding space that matches the corresponding bed position. Therefore, it is also suitable for upgrading and modifying existing infrared detection devices to improve the adaptability of existing infrared detection devices to different scenarios.

[0011] Another objective of this invention is to provide an infrared detection device, wherein the shielding cap includes a brim, wherein the brim has a structural shape that matches the opening edge and is adapted to be fitted onto the opening edge, wherein the shielding piece is disposed on the brim and forms a shielding of the opening when the brim is fitted onto the opening edge, thereby causing the lens to generate the shielding area.

[0012] Another objective of this utility model is to provide an infrared detection device, wherein a movable ball head is provided at one end of the housing opposite to the opening, and a ball head movable groove matching the movable ball head is provided at one end of the base opposite to its bottom surface. The housing is installed on the base with the movable ball head movably embedded in the ball head movable groove, and the angle of the infrared detection device is adjusted based on the relative movement of the movable ball head and the ball head movable groove, so as to achieve the matching setting of the field of view shielding space formed by the shielding area with the corresponding bed position.

[0013] Another objective of this invention is to provide an infrared detection device, wherein the housing has a battery cavity and a tail opening communicating with the battery cavity, wherein the movable ball head is detachably fitted onto the tail opening with its spherical surface facing away from the tail opening and is further used as a cover to shield the battery cavity. This dual-purpose design simplifies the structure of the infrared detection device.

[0014] Another objective of this invention is to provide an infrared detection device, wherein the shielding cap can form a shielding area for the lens, and the infrared detection device is based on the optical structure design of the lens. The infrared detection device can detect the human body getting up in a side-mounted state by simply selecting the installation height or adjusting the angle up and down. It achieves the matching setting between the field of view shielding space formed by the shielding area and the corresponding bed height and area, thus making the debugging simple and conducive to commercialization and popularization at the consumer level.

[0015] Another objective of this invention is to provide an infrared detection device, wherein the infrared detection device, based on the design of the lens, enables the detection of a human body leaving the bed. The lens, suitable for use as a lens in the infrared detection device, has a light-incoming surface and a light-outgoing surface opposite to the light-incoming surface. In a side-mounted state, the light-incoming surface of the lens is directly facing the infrared detection device. The lens includes a first focusing area and a second focusing area arranged vertically. The first focusing area occupies more than or equal to 50% of the lens area and includes multiple first lens units arranged horizontally. The second focusing area includes a shielding area and multiple second lens units arranged horizontally on the left and right sides of the shielding area. Each first lens unit and each second lens unit has focusing characteristics and is designed with a focal length that meets the requirements. It is sufficient to match the same pyroelectric infrared sensor mounting position. In the side-mounted state of the infrared detection device, with the light-incoming surface of the lens facing forward, the first focusing area is used to form a forward downward field of view. The optical center of each first lens unit is designed to be lower than the pyroelectric sensor mounting position. That is, the pyroelectric infrared sensor of the infrared detection device mounted at the pyroelectric sensor mounting position is higher than the optical center of each first lens unit. The second focusing area is used to form a near-field of view in the downward space of the forward downward field of view corresponding to the first focusing area. In this way, the infrared detection device in the side-mounted state can achieve the matching setting between the field of view shielding space formed by the shielding area and the corresponding bed height and area by simply selecting the installation height or adjusting the up and down angle.

[0016] According to one aspect of the present invention, an infrared detection device is provided, wherein the infrared detection device comprises:

[0017] A housing, wherein the housing includes a receiving cavity, an opening communicating with the receiving cavity, and an opening edge defining the opening;

[0018] A base, wherein the bottom surface of the base serves as the mounting surface for the infrared detection device, and the housing is movably and adjustably disposed at one end of the base opposite to its bottom surface;

[0019] A pyroelectric infrared sensor, wherein the pyroelectric infrared sensor is disposed in the accommodating cavity with its temperature sensing surface facing the opening;

[0020] A lens, wherein the lens is disposed in the opening with its light-emitting surface facing the opening of the receiving cavity; and

[0021] A shielding cap, wherein the shielding cap includes a brim and a shielding plate, wherein the brim has a structural shape that matches the opening edge, the shielding cap is installed on the housing with the brim fitted over the opening edge, wherein the shielding plate is disposed on the brim and forms a shielding of the opening when the brim is fitted over the opening edge, thereby creating a shielding area for the lens.

[0022] In one embodiment, the end of the housing opposite to the opening is provided with a movable ball head, and the end of the base opposite to its bottom surface is provided with a ball head movable groove that matches the movable ball head. The housing is mounted on the base with the movable ball head movably embedded in the ball head movable groove, and the angle adjustment of the infrared detection device is formed based on the relative movement of the movable ball head and the ball head movable groove.

[0023] In one embodiment, at least one of the movable ball head and the ball head movable groove is provided with a magnetic element, and the movable ball head is movably mounted to the ball head movable groove in a magnetic manner.

[0024] In one embodiment, the housing defines a battery cavity and a tail opening communicating with the battery cavity, wherein the movable ball head is detachably fitted onto the tail opening with its spherical surface facing away from the tail opening.

[0025] In one embodiment, the size and / or position of the shielding plate is adjustable.

[0026] According to another aspect of the present invention, an infrared detection device is provided, the infrared detection device comprising:

[0027] A housing, wherein the housing includes a receiving cavity, an opening communicating with the receiving cavity, and a movable ball head disposed at an end opposite to the opening;

[0028] A base, wherein the bottom surface of the base serves as the mounting surface for the infrared detection device, wherein one end of the base opposite to its bottom surface is provided with a ball head movable groove that matches the movable ball head, wherein the housing is mounted on the base in a state in which the movable ball head is movably embedded in the ball head movable groove, and the angle adjustment of the infrared detection device is formed based on the relative movement of the movable ball head and the ball head movable groove.

[0029] A pyroelectric infrared sensor, wherein the pyroelectric infrared sensor is disposed within the accommodating cavity with its temperature-sensing surface facing the opening; and

[0030] A lens, wherein the lens is positioned in the opening with its light-emitting surface facing the opening of the accommodating cavity.

[0031] In one embodiment, at least one of the movable ball head and the ball head movable groove is provided with a magnetic element, and the movable ball head is movably mounted to the ball head movable groove in a magnetic manner.

[0032] In one embodiment, the housing has a battery cavity and a tail opening communicating with the battery cavity, wherein the movable ball head is detachably fitted onto the tail opening with its spherical surface facing away from the tail opening.

[0033] In one embodiment, the light-gathering surface of the lens is directly facing the side-mounted use state of the infrared detection device. The lens includes a first focusing area and a second focusing area arranged vertically. The first focusing area accounts for more than or equal to 50% of the area of ​​the lens and includes a plurality of first lens units arranged horizontally. The second focusing area includes a shielding area and a plurality of second lens units arranged horizontally on the left and right sides of the shielding area. Each first lens unit and each second lens unit has focusing characteristics and is designed in terms of focal length to match the same pyroelectric infrared sensor. The first focusing area is used to form a forward downward field of view in the side-mounted use state of the infrared detection device. Corresponding to the side-mounted use state of the infrared detection device, the optical center of each first lens unit is lower than the pyroelectric infrared sensor. The second focusing area is used to form a near field of view in the downward space of the forward downward field of view corresponding to the first focusing area.

[0034] In one embodiment, the lens further includes a third focusing area located above the first focusing area, wherein the third focusing area includes a plurality of third lens units arranged left and right, each of the third lens units having focusing characteristics and having a focal length designed to match the pyroelectric infrared sensor, wherein the third focusing area is used to form a forward field of view in the upward space of the forward downward field of view corresponding to the first focusing area.

[0035] In one embodiment, the infrared detection device includes a shielding cap, the shielding cap including a brim and a shielding plate, the housing having an opening edge defining the opening, the brim having a structural shape matching the opening edge, the shielding cap being installed on the housing with the brim fitted over the opening edge, and the shielding plate being disposed on the brim, forming a shielding area by partially blocking the lens when the brim is fitted over the opening edge.

[0036] In one embodiment, the visor is made of a transparent and / or flexible material.

[0037] In one embodiment, the infrared detection device further includes a microwave detection module, wherein the microwave detection module is disposed below the pyroelectric infrared sensor.

[0038] The further objectives and advantages of this invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an infrared detection device according to an embodiment of the present invention.

[0040] Figure 2 This is a schematic diagram showing the disassembled structure of the infrared detection device according to the above embodiments of the present invention.

[0041] Figure 3 This is a schematic diagram showing the disassembled structure of the infrared detection device according to the above embodiments of the present invention.

[0042] Figure 4 This is a schematic diagram illustrating the orientation adjustment of the infrared detection device according to the above embodiments of the present invention.

[0043] Figure 5 This is a schematic diagram showing the disassembled structure of the infrared detection device according to the above embodiments of the present invention.

[0044] Figure 6A This is a schematic diagram illustrating the adjustable principle of a shielding cap of the infrared detection device according to the above embodiments of the present invention.

[0045] Figure 6B This is a schematic diagram illustrating the movable adjustment principle of a shielding piece in the shielding cap according to the above embodiment of the present invention.

[0046] Figure 7A This is a schematic diagram of the structure of a lens of the infrared detection device according to the above embodiments of the present invention.

[0047] Figure 7B This is a schematic diagram illustrating the structural principle of the lens in the infrared detection device according to the above embodiments of the present invention.

[0048] Figure 7C This is a schematic diagram of a side-mounted application scenario of the infrared detection device according to the above embodiments of the present invention.

[0049] Figure 8A This is a schematic diagram of the field of view distribution when the infrared detection device according to the above embodiment of the present invention is used for human wake-up detection in a side-mounted state.

[0050] Figure 8B This is a schematic diagram of the field of view distribution when the infrared detection device according to the above embodiment of the present invention is used for human wake-up detection in a side-mounted state.

[0051] Figure 8C This is a schematic diagram of the field of view distribution when the infrared detection device according to the above embodiment of the present invention is used for human wake-up detection in a side-mounted state.

[0052] Figure 8D This is a schematic diagram illustrating an application scenario where the infrared detection device described in the above embodiments of the present invention is used for detecting when a person gets up.

[0053] Figure 9A A schematic diagram of the structure of another lens of the infrared detection device according to the above embodiments of the present invention.

[0054] Figure 9B This is a schematic diagram illustrating the structural principle of another lens in the infrared detection device according to the above embodiments of the present invention.

[0055] Figure 9C This is a schematic diagram of the field of view distribution when the infrared detection device according to the above embodiment of the present invention is used for human wake-up detection in a side-mounted state.

[0056] Figure 9D This is a schematic diagram of the field of view distribution when the infrared detection device according to the above embodiment of the present invention is used for human wake-up detection in a side-mounted state.

[0057] Figure 9E This is a schematic diagram of the field of view distribution when the infrared detection device according to the above embodiment of the present invention is used for human wake-up detection in a side-mounted state. 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", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "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 a limitation of 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] This invention provides an infrared detection device, wherein the infrared detection device can detect when a person gets up based on the addition of accessories and / or the design of lenses.

[0062] Refer to the accompanying drawings in the specification of this utility model. Figures 1 to 5 As shown, an infrared detection device 100 according to an embodiment of the present invention is illustrated. The infrared detection device 100 includes a lens 10, a pyroelectric infrared sensor 20, a housing 30, a base 40, and a shielding cap 50. The bottom surface of the base 40 serves as the mounting surface of the infrared detection device 100. The housing 30 is movably and adjustably disposed at one end of the base 40 opposite to its bottom surface. The lens 10 is disposed at the front of the housing 30. The pyroelectric infrared sensor 20 is housed in the housing 30 and faces the lens 10. The shielding cap 50 is fitted over the front of the housing 30 and has a shielding plate 52 that partially blocks the lens 10. Based on the shielding of the lens 10 by the shielding plate 52, the lens 10 generates a shielding area. Based on the matching of the field of view shielding space formed by the shielding area with the corresponding bed position, the infrared detection device 100 can be used for detecting when a person gets up.

[0063] Specifically, the housing 30 includes a receiving cavity 31, an opening 310 communicating with the receiving cavity 31, and an opening edge 311 defining the opening 310. The pyroelectric infrared sensor 20 is disposed in the receiving cavity 31 with its temperature-sensing surface facing the opening 310. The lens 10 is disposed in the opening 310 with its light-emitting surface facing the opening 310 of the receiving cavity 31. The shielding cap 50 includes a cap edge 51, wherein the cap edge 51 has a structural shape that matches the opening edge 311. The shielding cap 50 is installed on the housing 30 with the cap edge 51 fitted over the opening edge 311. The shielding piece 52 is disposed on the cap edge 51 and forms a shielding effect on the opening 310 when the cap edge 51 is fitted over the opening edge 311, thereby causing the lens to generate the shielding area.

[0064] It is worth mentioning that the shielding cap 50 is detachably fitted onto the opening edge 311 and can be selectively used as an accessory. The use of the shielding cap 50 forms a regional shielding of the lens 10, which is suitable for modifying existing infrared detection devices to achieve the detection of human bodies leaving the bed.

[0065] In other words, the existing infrared detection device, based on the addition of the shielding cap 50, can block the corresponding lens to create a field of view shielding space that matches the corresponding bed position. Therefore, it is also suitable for upgrading and transforming the existing infrared detection device to improve the adaptability of the existing infrared detection device to different scenarios.

[0066] In particular, based on the use of the shielding cap 50, when dealing with the need for human body leaving the bed, there is no need to make a special shielding design for the lens for the need for leaving the bed, and the shielding cap 50 can be selectively and flexibly installed according to the application requirements, which is conducive to improving the flexibility of the infrared detection device.

[0067] Further details can be found in the following references. Figure 3 The housing 30 has a movable ball head 32 at one end opposite to the opening 310, and the base 40 has a ball head groove 41 that matches the movable ball head 32 at one end opposite to its bottom surface. The housing 30 is mounted on the base 40 with the movable ball head 32 movably inserted into the ball head groove 41, and is correspondingly referenced. Figure 4 The relative movement between the movable ball head 32 and the movable ball head groove 41 allows for angle adjustment of the infrared detection device 100, facilitating the matching of the field of view shielding space formed by the shielding area with the corresponding bed position, making it easy to debug and use.

[0068] Specifically, at least one of the movable ball head 32 and the ball head movable groove 41 is provided with a magnetic attraction element. The movable ball head 32 is movably installed in the ball head movable groove 41 in a magnetic attraction manner. On the one hand, the magnetic attraction ensures the secure installation of the movable ball head 32 in the ball head movable groove 41, thereby maintaining the angle of the infrared detection device 100. On the other hand, the magnetic attraction can form a damping effect on the movement of the movable ball head 32 relative to the ball head movable groove 41, which is beneficial for the user to accurately adjust the angle of the infrared detection device 100.

[0069] It is worth mentioning that the infrared detection device 100 uses passive infrared detection technology, which has the advantage of low energy consumption. Therefore, it is suitable for battery power supply, which is conducive to its commercialization in the aftermarket. Specifically, refer to... Figure 5 The housing 30 has a battery cavity 33 and a tail opening 330 communicating with the battery cavity 33. The movable ball head 32 is detachably fitted onto the tail opening 330 with its spherical surface facing away from the tail opening 330, and is further used as a cover to shield the battery cavity 33. This dual-purpose design helps to simplify the structure of the infrared detection device 100.

[0070] Specifically, refer to Figure 6A As shown, the size of the shielding plate 52 can be flexibly set as needed to adjust the size of the shielding area of ​​the shielding cap 50 on the lens 10. For example, the shielding plate 52 can be adjusted up and down and / or left and right. For example, the shielding plate 52 is provided with a slider. The slider can be slid according to actual needs to change the shielding area of ​​the shielding cap 50 on the lens 10, so as to achieve the matching setting of the field of view shielding space formed by the shielding plate 52 with the corresponding bed position. For example, as shown in Figure 6, the shielding plate 52 is provided with three sliders that slide in three directions A, B, and C. The size of the shielding plate 52 can be adjusted based on the sliding of any one, any two, or any three sliders in directions A, B, and C.

[0071] It is worth mentioning that, for reference Figure 6B As shown, the shielding plate 52 is movably set relative to the cap brim 51, and the shielding area of ​​the lens 10 can be changed based on the movement of the shielding plate 52 in either direction a or b, so as to flexibly match the corresponding bed position. In particular, refer to Figure 1 It also allows the relative position of the shielding plate 52 and the lens 10 to be changed based on the rotation adjustment of the shielding cap 50, so as to achieve the matching setting of the field of view shielding space formed by the shielding plate 52 with the corresponding bed position.

[0072] Further, refer to Figures 7A to 9EFurthermore, based on the optical structure design of the lens 10, this utility model enables the detection of a person waking up.

[0073] Corresponding reference Figures 7A to 7C The present invention provides a schematic diagram of the structure of a lens 10, wherein the lens 10 has a light-inlet surface 101 and a light-outlet surface 102 opposite to the light-inlet surface 101, wherein the light-inlet surface 101 of the lens 10 is directly facing the side of the infrared detection device. The lens 10 includes a first focusing area 11 and a second focusing area 12 arranged vertically. The first focusing area 11 accounts for more than or equal to 50% of the area of ​​the lens 10 and includes a plurality of first lens units 111 arranged horizontally. The second focusing area 12 includes a shielding area 121 and a plurality of second lens units 122 arranged horizontally on the left and right sides of the shielding area 121. Each first lens unit 111 and each second lens unit 122 has light-gathering characteristics and a focal length of [missing information]. The design is designed to be compatible with the same pyroelectric infrared sensor 20. The first focusing area 11 is used to form a forward downward field of view 110 in the side-mounted use state of the infrared detection device 100. Corresponding to the side-mounted use state of the infrared detection device 100, each of the first lens units 111 is designed to keep its optical center lower than the pyroelectric infrared sensor 20. The second focusing area 12 is used to form a near-field field of view 120 in the downward space of the forward downward field of view 110 corresponding to the first focusing area 11. In this way, the infrared detection device 100 in the side-mounted state can achieve the matching setting between the field of view shielding space formed by the shielding area 121 and the corresponding bed height and area by simply selecting the installation height or adjusting the up and down angle.

[0074] Preferably, in the state where the light-inlet surface 101 of the lens 10 is oriented forward, the initial direction of the forward downward field of view 110 corresponding to the first light-concentrating area 11 is the forward downward direction. Corresponding to the state where the light-inlet surface 101 of the lens 10 is oriented forward, the optical center of each first lens unit 111 is designed to be lower than the pyroelectric infrared sensor 20.

[0075] It is understood that the shielding area 121 is a region on the second focusing area 12 that is significantly weaker in terms of the focusing intensity of the pyroelectric infrared sensor 20 compared to the first lens unit 111 and the second lens unit 122. The shielding area 121 can be a region formed by blocking at least one lens unit of the same as the second lens unit 122, or it can be a region on the second focusing area 12 that is set to not have focusing characteristics, or it can be a region formed by the design that the optical center and focal length do not match the aforementioned pyroelectric sensor mounting position when it is set to have focusing characteristics. This utility model does not limit this.

[0076] It is worth mentioning that, in this embodiment of the present invention, the shielding area 121 is formed by the shielding cap 50 blocking the second focusing area 12. The shielding area 121 can be removed from the second focusing area 12 based on the removal of the shielding cap 50. Therefore, it is advantageous to choose whether to retain the shielding area 121 based on actual application needs, which is beneficial to improving the adaptability of the infrared detection device 100 to different usage scenarios.

[0077] In other words, in specific applications, each lens unit of the lens 10 is allowed to be in an unobstructed state. When applied to the application scenario of human body getting up detection, the addition of the blocking cap 50 can block at least one of the second lens units 122 on the lens 10. Based on the selection of the installation height of the infrared detection device 100 or the adjustment of the up and down angle, the matching setting between the field of view shielding space formed by the blocking of the blocking cap 50 and the corresponding bed height and area can be achieved.

[0078] It is worth mentioning that the shielding cap 50 can be made of transparent material to ensure the aesthetics of the infrared detection device 100 when the shielding cap 50 is installed. The transparent shielding cap 50 can block the lens 10 so that the corresponding area does not have light-gathering characteristics. The shielding cap 50 can also be made of flexible material, such as silicone, which is beneficial for the shielding cap 50 to be easily fitted onto the opening edge 311 based on the flexible material, and the installation stability of the shielding cap 50 is ensured based on flexible deformation. It can be understood that the shielding cap 50 can be made of both flexible and transparent materials.

[0079] Those skilled in the art should understand that, based on the working principle of the infrared detection device, the fields of view 110 and 120 corresponding to each of the lens units 111 and 122 can be defined as the projection space formed by the positive and negative temperature sensing surfaces of the pyroelectric infrared sensor 20 through the optical centers of each of the lens units 111 and 122.

[0080] In particular, further reference Figures 8A to 8C The field of view distribution of the infrared detection device 100 according to the above embodiment of the present invention in a side-mounted state for detecting when a person gets out of bed is illustrated. It can be seen that, based on the aforementioned design of the lens 10 and the partial obstruction of the lens 10 by the shielding cap 50, when the field of view shielding space formed by the shielding cap 50 on the lens 10 matches the corresponding bed height and area, the postures of a person getting out of bed and sitting or lying on the bed will form corresponding actions in the downward-facing field of view 110 corresponding to the first focusing area 11 or the near-field of view 120 corresponding to the second focusing area 12, thereby realizing the detection of a person getting out of bed.

[0081] Specifically, when the infrared detection device 100 is used for human body getting up detection in the side-mounted state, on the one hand, the human body moving in the forward direction and radially relative to the infrared detection device 100 can generate a tangential movement component in the forward downward field of view 100. Thus, based on the high area ratio of the first focusing area 11 to the lens 10, the radial sensitivity of the infrared detection device 100 is guaranteed. Correspondingly, the infrared detection device 100 in the side-mounted state has good radial and tangential sensitivity for detecting movements that move away from or towards the bed in the forward and backward directions. Correspondingly, it is beneficial to ensure the radial and tangential sensitivity of the infrared detection device 100 in the side-mounted state for detecting movements of the human body outside the aforementioned field of view shielding space.

[0082] It is worth mentioning that in this embodiment of the present invention, the optical centers of each of the second lens units 122 on the same side of the shielding plate 52 are designed with staggered heights. This increases the angular span in the forward direction between the near-fields of view 120 corresponding to each of the second lens units 122, within the appropriate area limitation of the second focusing area 12, and simultaneously forms a complementary relationship in the tangential direction between the near-fields of view 120 corresponding to each of the second lens units 122. This allows the infrared detection device 100 in the side-mounted state to obtain good radial and tangential sensitivity in the downward space of the forward downward field of view 110 corresponding to the first focusing area 11. Consequently, the infrared detection device 100 in the side-mounted state has good radial and tangential sensitivity for detecting movements moving away from or towards the bed in the left-right direction. Furthermore, corresponding to… Figure 8C As shown, based on the staggered design of the optical centers of the second lens unit 122, the posture of a person sitting or lying on the bed will also form a corresponding action in the near field of view 120 corresponding to the second focusing area 12.

[0083] In other words, when the field-of-view shielding space formed by the shielding area 121 matches the height and area of ​​the corresponding bed, in Figure 8DThe illustrated application scenario for detecting a person getting out of bed involves two aspects. Firstly, the movement of a person changing from a lying to a sitting position on the bed will create a corresponding action in the downward-facing field of view 110 corresponding to the first focusing area 11 or the near-field of view 120 corresponding to the second focusing area 12. Secondly, the downward-facing field of view 110 corresponding to the first focusing area 11 will project onto the front of the bed, forming a corresponding detection response area in front of the bed, while the near-field of view 120 corresponding to the second focusing area 12 will project onto the left and right sides of the bed, forming corresponding detection responses on the left and right sides of the bed. The shielding cap 50, by shielding the infrared detection device 100 from responding to the movement of a person lying on the bed, forms corresponding detection response zones around the left and right sides and the front of the bed. This allows the infrared detection device 100 to respond to both the movement of a person sitting or lying on the bed and the movement of a person further leaving the bed, thereby detecting when a person gets up. Based on the aforementioned structural design of the lens 10, the accuracy of the infrared detection device 100 is ensured when applied to detecting when a person gets up.

[0084] In particular, in this embodiment of the present invention, each of the first lens units 111 in the first focusing area 11 is preferably designed with a central high and left and right low optical center distribution. This allows the downward front field of view 110 of the infrared detection device 100 in the side-mounted state to form a projection along the fan ring distribution on the ground. This is beneficial to improving the tangential movement component of a human body moving along the side mounting surface of the infrared detection device 100 and perpendicular to the side mounting surface of the lens 10 in the downward front field of view 110, thereby improving the radial sensitivity of the infrared detection device 100 in the side-mounted state.

[0085] Furthermore, in this embodiment of the present invention, the pyroelectric infrared sensor 20 is positioned upwardly offset from the centerline of the lens 10 with its temperature-sensing surface facing the light-emitting surface 102 of the lens 10. This allows the first focusing area 11 to form a forward downward field of view 110, which helps to reduce the refraction angle of incident light rays along the forward downward field of view 110 after passing through the first focusing area 11. Correspondingly, this helps to reduce the light loss in the first focusing area 11 and ensure the sensitivity of the infrared detection device 100.

[0086] Preferably, in this embodiment of the present invention, the pyroelectric infrared sensor 20 is positioned upwards away from the center of the lens 10, with its temperature-sensing surface tilted downwards toward the light-emitting surface 102 of the lens 10. This position, with the pyroelectric infrared sensor 20 positioned upwards away from the center of the lens 10, reduces the light loss of the temperature-sensing surface of the pyroelectric infrared sensor 20 toward the second focusing area 12, which is beneficial to further improving the sensitivity of the infrared detection device 100.

[0087] Specifically, in this embodiment of the present invention, in the forward-facing state of the light-incoming surface 101 of the lens 10, corresponding to the structural design where the optical center of each of the first lens units 111 is lower than that of the pyroelectric infrared sensor 20, the height of the pyroelectric infrared sensor 20 relative to the optical center of any of the first lens units 111 is Δh, and the distance between the pyroelectric infrared sensor 20 and the optical center of the first lens unit 111 is d, wherein the ratio between Δh and d satisfies: 0.2≤Δh:d≤0.6. This allows the infrared detection device 100 in the side-mounted state to be installed at a height of 2 meters or less, based on the selection of the installation height or the angle adjustment up and down, to achieve a matching setting between the field of view shielding space formed by the shielding cap 50 and different bed heights and areas. Therefore, it is beneficial to simplify the installation of the infrared detection device 100 and ensure the adaptability of the field of view shielding space of the infrared detection device 100 to different bed heights and areas.

[0088] Further reference Figures 9A to 9E As shown, to further improve the radial sensitivity of the infrared detection device 100 in the side-mounted state at an installation height of 2 meters or less, in this structure, the lens 10 further includes a third focusing area 13 located above the first focusing area 11, based on the structure of the lens 10 in the aforementioned embodiment. The third focusing area 13 includes a plurality of third lens units 131 arranged left and right. Each of the third lens units 131 has focusing characteristics and its focal length is designed to be compatible with the same pyroelectric infrared sensor 20. The third focusing area 13 is used to form a forward field of view 130 in the upward space of the forward downward field of view 110 corresponding to the first focusing area 11.

[0089] It is worth mentioning that, based on the traditional side-mounted detection concept, the forward field of view 130 corresponding to each of the third lens units 131 of the third focusing area 13 is usually used for long-distance detection in spaces that are far away from the infrared detection device 100, based on its forward orientation. The corresponding third focusing area 13 is usually designed with a large area ratio of the lens 10 to ensure the tangential sensitivity of long-distance detection, based on the traditional side-mounted detection concept.

[0090] However, based on the working principle of the infrared detection device 100, it is known that for a human body moving radially relative to the infrared detection device 100 in the forward field of view 130 direction, increasing the area of ​​the third focusing area 13 has a negligible effect on improving the radial sensitivity of the infrared detection device 100. In other words, in the traditional side-mounted detection concept, forming a forward field of view 130 based on the third focusing area 13 or further increasing the area of ​​the third focusing area 13 is meaningless for improving the radial sensitivity of the infrared detection device.

[0091] Unlike traditional side-mounted detection concepts, in this invention, the first focusing area 11 of the infrared detection device 100, which forms a forward downward field of view 110, has an area ratio of more than 50% to the lens 10, and thus has an area larger than that of the third focusing area 13, which forms a forward field of view 130. This allows a human body moving radially relative to the infrared detection device in the forward downward field of view 130 to generate a tangential movement component in the forward downward field of view 110. The high area ratio of the first focusing area 11 to the lens 10 ensures the radial sensitivity of the infrared detection device.

[0092] On the other hand, for a human body moving in the forward field of view 130 direction, although it is radially moving relative to the infrared detection device 100 and it is difficult to form a cross-border displacement of the corresponding infrared spot on the corresponding temperature sensing surface in the forward field of view 130, at an installation height of 2 meters or less, the radially moving human body is likely to be simultaneously in the blind zone between the forward field of view 130 and the forward downward field of view 110, as well as between the forward field of view 130 and the forward downward field of view 110. When the human body moves in the forward field of view 130 direction, the height of the blind zone between the forward field of view 130 and the forward downward field of view 110 at the position of the human body will change, resulting in a change in the light intensity of the lens 10, thereby generating a corresponding change in the signal intensity of the pyroelectric infrared sensor 20, and thus forming an equivalent improvement in the radial sensitivity of the infrared detection device 100.

[0093] Correspondingly, when the ratio between Δh and d described above satisfies 0.2≤Δh:d≤0.6, when a forward field of view 130 is formed based on the setting of the third focusing area 13, there is a large blind angle between the forward field of view 130 and the forward downward field of view 110. This allows the blind space occupied by a human body that moves radially relative to the infrared detection device in the direction of the forward field of view 130 to have a large variation, which is beneficial to ensuring the signal strength of the pyroelectric infrared sensor 20 based on the change in light intensity of the lens 10, thereby achieving an equivalent improvement in the radial sensitivity of the infrared detection device.

[0094] It is understandable that, for both top-mounted and side-mounted infrared detection devices, those skilled in the art know that the resolution of an infrared detection device is directly related to the distribution density of the field of view corresponding to each lens unit within a unit space. A higher distribution density of the field of view corresponding to each lens unit within a unit space means that even small movements can generate a corresponding infrared spot displacement across the sensing surface, enabling the detection of subtle human movements based on the corresponding electrical signal changes. In other words, the higher the distribution density of the field of view corresponding to each lens unit within a unit space, the higher the resolution of the infrared detection device. Therefore, under the lens design concept of existing infrared detection devices, the angle between the fields of view corresponding to adjacent lens units is usually small to reduce the blind zone between adjacent fields of view and increase the distribution density of the field of view corresponding to each lens unit within a unit space.

[0095] In other words, when a forward field of view 130 is formed based on the setting of the third focusing area 13, the blind zone between the forward field of view 130 and the forward downward field of view 110 corresponds to a large angular range of the ratio range between Δh and d described above. Although this angular range is contrary to the lens design concept of existing infrared detection devices, it can increase the amount of change in the blind zone space occupied by a human body that moves radially relative to the infrared detection device in the direction of the forward field of view 130. Therefore, it is beneficial to improve the signal intensity generated by the pyroelectric infrared sensor 20 based on the change in light intensity of the lens 10, thereby forming an equivalent improvement in the radial sensitivity of the infrared detection device.

[0096] Furthermore, in this embodiment of the present invention, the optical center design of each first lens unit 111 and each third lens unit 131 further satisfies the following: there is one and only one optical center of the first lens unit 111 between two planes that pass through the optical centers of any two adjacent third lens units 131 and are perpendicular to the line connecting the optical centers of the two third lens units 131. This allows for side-mounted use in the infrared detection device, such as... Figure 9D Such that the bright and dark fields in the forward field of view 130 corresponding to each of the third lens units 131 are respectively located in the upper space of the blind zone between the bright and dark fields of the corresponding forward lower field of view 110 and the upper space of the blind zone between the forward lower field of view 110 and the adjacent forward lower field of view 110, or as... Figure 9E The forward field of view 130 corresponding to each of the third lens units 131 is located in the upper space of the blind zone between the corresponding two forward downward field of view 110. Based on the complementarity of the forward field of view 130 and the forward downward field of view 110 in the tangential direction, the tangential resolution of the infrared detection device is improved.

[0097] It is worth mentioning that, Figure 9D and Figure 9E The complementary effect of the forward field of view 130 and the forward downward field of view 110 in the tangential direction is corresponding to... Figure 9A The diagram illustrates two complementary effects formed based on the optical center distribution design that satisfies the aforementioned requirements, under the constraint of the number of the first lens unit 111 and the third lens unit 131. Figure 9A Based on the structure of the lens 10 shown, and based on the increase in the number of the third lens units 131, corresponding to Figure 9D In the illustrated complementary effect, the upward space of the blind zone between the bright and dark fields of the forward downward field of view 110 and the upward space of the blind zone between the forward downward field of view 110 and the adjacent forward downward field of view 110 can further complement the bright and dark fields in the increased forward field of view 130, relative to... Figure 9D The result is a complete completion, but this utility model does not limit the scope of the invention.

[0098] It is understandable that human movement is usually accompanied by micro-motions in various directions. A human body moving radially relative to the infrared detection device in the forward field of view 130 direction typically produces accompanying tangential micro-motions based on its movement. Therefore, when the tangential resolution of the infrared detection device is improved based on the complementarity of the forward field of view 130 and the forward downward field of view 110 in the tangential direction, the accompanying tangential micro-motions produced by a human body moving radially relative to the infrared detection device 100 in the forward field of view 130 direction can be effectively detected, thus achieving an equivalent improvement in the radial resolution and sensitivity of the infrared detection device 100.

[0099] In other words, when the ratio between Δh and d described above satisfies the condition that 0.2 ≤ Δh:d ≤ 0.6, the infrared detection device 100 in the side-mounted state can achieve a matching setting between the field-of-view shielding space corresponding to the shielding area 121 and different bed heights and areas based on the installation height selection or the angle adjustment at an installation height of 2 meters or less. Furthermore, when a forward field of view 130 is formed based on the setting of the third focusing area 13, the blind zone between the forward field of view 130 and the forward downward field of view 110 corresponds to the range of the ratio between Δh and d. The fixed angle range is relatively large. Although this angle range is contrary to the lens design concept of existing infrared detection devices, for infrared detection devices installed at an installation height of 2 meters or less, the amount of change in the blind zone space occupied by a human body moving radially relative to the infrared detection device 100 in the forward field of view 130 direction is increased. Therefore, it is beneficial to improve the signal strength generated by the pyroelectric infrared sensor 20 based on the light intensity change of the lens 10, thereby forming an equivalent improvement in the radial sensitivity of the infrared detection device 100.

[0100] Furthermore, when the tangential resolution of the infrared detection device is improved based on the complementarity of the forward field of view 130 and the forward downward field of view 110 in the tangential direction, since human movement is usually accompanied by micro-motions in various directions, a human body moving in the forward field of view 130 direction and moving radially relative to the infrared detection device usually produces accompanying tangential micro-motions based on its movement. Therefore, at an installation height of 2 meters or less, when a human body moves in the forward field of view 130 direction and moves radially relative to the infrared detection device, the accompanying tangential micro-motions produced by the human body based on its movement can be effectively detected, thus forming an equivalent improvement in the radial resolution and sensitivity of the infrared detection device.

[0101] Furthermore, in this embodiment of the present invention, when the pyroelectric infrared sensor 20 is positioned upwardly offset from the center of the lens 10, with its temperature-sensing surface facing the light-emitting surface 102 of the lens 10, the pyroelectric infrared sensor 20 is preferably positioned in the lateral space corresponding to the first focusing area 11. That is, the height of the pyroelectric infrared sensor 20 is preferably set below the height of the lower boundary of the third focusing area 13. In this way, with the pyroelectric infrared sensor 20 positioned upwardly offset from the center of the lens 10, the light loss of the temperature-sensing surface of the pyroelectric infrared sensor 20 to the first focusing area 11 is further reduced. Correspondingly, the optical center of each of the third lens units 131 in the third focusing area 13 is preferably set below the lower boundary of the third lens unit 131 to which it belongs and below the lower boundary of the third focusing area 13, such as being set in the first focusing area 11, so that in the side-mounted state of the infrared detection device 100, the initial pointing of the forward field of view 130 corresponding to the third focusing area 13 can approach or directly be the forward pointing.

[0102] It is worth mentioning that in these embodiments of the present invention, the lens units 111, 122, and 131 with light-gathering characteristics can be designed as convex lenses to have light-gathering characteristics, or they can be designed as Fresnel lenses based on the corresponding Fresnel pattern design to have light-gathering characteristics, or they can have light-gathering characteristics based on the convex lens shape and the corresponding Fresnel pattern design. The present invention does not limit this, and the lens units 111, 122, and 131 are not limited to using the same light-gathering structure. For example, the third lens unit 131 is designed as a convex lens with a bean-shaped dot, while the first lens unit 111 is designed as a Fresnel lens.

[0103] Furthermore, each of the lens units 111, 122, and 131 has light-gathering characteristics and is optically equivalent to a convex lens. However, the convex lens that each of the lens units 111, 122, and 131 is optically equivalent to is not limited to a convex lens with its geometric center as the optical center; it can be equivalent to a partial form of a convex lens with its geometric center as the optical center. Therefore, in the lens 10 of this invention, the optical centers of the lens units 111, 122, and 131 may not be located on the body of the lens units 111, 122, and 131, and this invention does not impose any limitations on this.

[0104] It is worth mentioning that, in some embodiments of this utility model, the infrared detection device 100 is further provided with a microwave detection module for microwave detection below the pyroelectric infrared sensor 20, so as to improve the sensitivity of the infrared detection device, especially the detection sensitivity in the radial direction, based on infrared and microwave dual-technology. For example, taking advantage of the ability of microwaves to detect human micro-movements corresponding to breathing and / or heartbeat, the accurate detection of human behaviors such as entering, getting up and lying down, and getting out of bed can be achieved based on infrared and microwave dual-technology.

[0105] 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.

[0106] 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. An infrared detection device, characterized in that, include: A housing, wherein the housing includes a receiving cavity, an opening communicating with the receiving cavity, and an opening edge defining the opening; A base, wherein the bottom surface of the base serves as the mounting surface for the infrared detection device, and the housing is movably and adjustably disposed at one end of the base opposite to its bottom surface; A pyroelectric infrared sensor, wherein the pyroelectric infrared sensor is disposed in the accommodating cavity with its temperature sensing surface facing the opening; A lens, wherein the lens is disposed in the opening with its light-emitting surface facing the opening of the receiving cavity; as well as A shielding cap, wherein the shielding cap includes a brim and a shielding plate, wherein the brim has a structural shape that matches the opening edge, the shielding cap is installed on the housing with the brim fitted over the opening edge, wherein the shielding plate is disposed on the brim and forms a shielding of the opening when the brim is fitted over the opening edge, thereby creating a shielding area for the lens.

2. The infrared detection device according to claim 1, wherein the end of the housing opposite to the opening is provided with a movable ball head, wherein the end of the base opposite to its bottom surface is provided with a ball head movable groove that matches the movable ball head, wherein the housing is installed on the base in a state in which the movable ball head is movably embedded in the ball head movable groove, and the angle adjustment of the infrared detection device is formed based on the relative movement of the movable ball head and the ball head movable groove.

3. The infrared detection device according to claim 2, wherein at least one of the movable ball head and the ball head movable groove is provided with a magnetic attraction element, and the movable ball head is movably mounted in the ball head movable groove in a magnetic attraction manner.

4. The infrared detection device according to claim 3, wherein the housing has a battery cavity and a tail opening communicating with the battery cavity, wherein the movable ball head is detachably fitted onto the tail opening with its spherical surface facing away from the tail opening.

5. The infrared detection device according to claim 1, wherein the size and / or position of the shielding plate is adjustable.

6. An infrared detection device, characterized in that, include: A housing, wherein the housing includes a receiving cavity, an opening communicating with the receiving cavity, and a movable ball head disposed at an end opposite to the opening; A base, wherein the bottom surface of the base serves as the mounting surface for the infrared detection device, wherein one end of the base opposite to its bottom surface is provided with a ball head movable groove that matches the movable ball head, wherein the housing is mounted on the base in a state in which the movable ball head is movably embedded in the ball head movable groove, and the angle adjustment of the infrared detection device is formed based on the relative movement of the movable ball head and the ball head movable groove. A pyroelectric infrared sensor, wherein the pyroelectric infrared sensor is disposed within the accommodating cavity with its temperature-sensing surface facing the opening; and A lens, wherein the lens is positioned in the opening with its light-emitting surface facing the opening of the accommodating cavity.

7. The infrared detection device according to claim 6, wherein at least one of the movable ball head and the ball head movable groove is provided with a magnetic attraction element, and the movable ball head is movably mounted in the ball head movable groove in a magnetic attraction manner.

8. The infrared detection device according to claim 7, wherein the housing has a battery cavity and a tail opening communicating with the battery cavity, wherein the movable ball head is detachably fitted onto the tail opening with its spherical surface facing away from the tail opening.

9. The infrared detection device according to any one of claims 6 to 8, wherein the light-gathering surface of the lens is directly facing the side-mounted use state of the infrared detection device, the lens includes a first focusing area and a second focusing area arranged vertically, wherein the area of ​​the first focusing area is greater than or equal to 50% of the area of ​​the lens and includes a plurality of first lens units arranged horizontally, wherein the second focusing area includes a shielding area and a plurality of second lens units arranged horizontally on the left and right sides of the shielding area, wherein each first lens unit and each second lens unit has focusing characteristics and the focal length is designed to be compatible with the same pyroelectric infrared sensor, wherein the first focusing area is used to form a forward downward field of view in the side-mounted use state of the infrared detection device, and corresponding to the side-mounted use state of the infrared detection device, the optical center of each first lens unit is lower than the pyroelectric infrared sensor, wherein the second focusing area is used to form a near field of view in the downward space of the forward downward field of view corresponding to the first focusing area.

10. The infrared detection device according to claim 9, wherein the lens further comprises a third focusing area located above the first focusing area, wherein the third focusing area comprises a plurality of third lens units arranged left and right, each of the third lens units having focusing characteristics and having a focal length designed to match the pyroelectric infrared sensor, wherein the third focusing area is used to form a forward field of view in the upward space of the forward downward field of view corresponding to the first focusing area.

11. The infrared detection device according to claim 9, wherein the infrared detection device includes a shielding cap, wherein the shielding cap includes a brim and a shielding plate, wherein the housing has an opening edge defining the opening, wherein the brim has a structural shape matching the opening edge, the shielding cap is installed on the housing with the brim fitted over the opening edge, wherein the shielding plate is disposed on the brim and forms the shielding area by partially blocking the lens when the brim is fitted over the opening edge.

12. The infrared detection device according to claim 11, wherein the shielding cap is made of a transparent material and / or a flexible material.

13. The infrared detection device according to any one of claims 6 to 8, wherein the infrared detection device further comprises a microwave detection module, wherein the microwave detection module is disposed below the pyroelectric infrared sensor.

Images