Sensing device and camera device

Abstract

The utility model provides an induction device and a camera device. The induction device comprises a shell assembly, a pyroelectric sensor, a Fresnel lens and a moving assembly, wherein the pyroelectric sensor, the Fresnel lens and the moving assembly are arranged on the shell assembly; the Fresnel lens comprises at least two Fresnel pattern areas with different light condensing capacities; one of the pyroelectric sensor and the Fresnel lens is fixedly connected with the shell assembly, and the other one of the pyroelectric sensor and the Fresnel lens is movably connected with the shell assembly through the moving assembly; wherein the pyroelectric sensor and the Fresnel lens move relative to each other so as to switch a Fresnel pattern area corresponding to the pyroelectric sensor. The detection distance can be adjusted, and the multi-scene adaptability of the sensing device can be improved.

Description

Technical Field

[0001] The present application relates to the field of sensor technology, and in particular to a sensing device and a camera device. Background Art

[0002] Common sensing devices usually include a pyroelectric sensor and a corresponding Fresnel lens. The detection distance of the sensing device varies due to the different focusing capabilities of the Fresnel lens. Therefore, the detection distance of the sensing device is generally fixed, which makes the sensing device poorly adaptable to multiple scenarios. Utility Model Content

[0003] The present application provides a sensing device and a camera device, which can achieve adjustable detection distance and improve the multi-scenario adaptability of the sensing device.

[0004] In order to solve the above technical problems, the present application provides a sensing device, wherein the sensing device includes a shell component and a pyroelectric sensor, a Fresnel lens and a movable component arranged on the shell component; the Fresnel lens includes at least two Fresnel fringe areas with different focusing capabilities; one of the pyroelectric sensor and the Fresnel lens is fixedly connected to the shell component, and the other is movably connected to the shell component through the movable component; wherein the pyroelectric sensor and the Fresnel lens move relative to each other to switch the Fresnel fringe area corresponding to the pyroelectric sensor.

[0005] In order to solve the above-mentioned technical problems, the present application further provides a camera device, wherein the camera device includes the above-mentioned sensing device and a lens, the sensing device is fixed on the lens through a shell assembly and is communicatively connected with the lens, the camera area of ​​the lens at least partially overlaps with the detection area of ​​the sensing device, and the lens works based on the detection results of the sensing device.

[0006] The beneficial effects of the present application are as follows: the sensing device of the present application includes a shell component, a pyroelectric sensor, a Fresnel lens, and a moving component, and the Fresnel lens includes at least two Fresnel fringe areas with different focusing capabilities, and the setting of the moving component is conducive to the relative movement between the pyroelectric sensor and the Fresnel lens, so it is convenient to switch the Fresnel fringe areas with different focusing capabilities to correspond to the pyroelectric sensor, and then the infrared light can be transmitted to the pyroelectric sensor through one of the Fresnel fringe areas, so that the detection distance of the sensing device can be adjusted, and the multi-scenario applicability of the sensing device can be improved; further, the Fresnel lens includes at least two Fresnel fringe areas with different focusing capabilities, and the setting of the moving component is convenient to switch the Fresnel fringe areas with different focusing capabilities to correspond to the pyroelectric sensor, so the number of pyroelectric sensors can be reduced, the number of parts of the sensing device can be reduced, the production design cost can be reduced, and the volume can be reduced, and the structural simplicity can be improved; further, the shell component of the present application can limit the pyroelectric sensor, the Fresnel lens, and the moving component, and the structural stability of the sensing device can be improved. Therefore, the sensing device of the present application can achieve adjustable detection distance, can improve the multi-scenario adaptability of the sensing device, reduce the number of components, reduce the volume, improve structural simplicity, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0008] Figure 1 It is a structural schematic diagram of an embodiment of the sensing device of the present application;

[0009] Figure 2 yes Figure 1 Schematic diagram of the explosion structure of the embodiment;

[0010] Figure 3 It is a structural schematic diagram of an embodiment of the first fixing member and the Fresnel lens of the present application;

[0011] Figure 4 It is a structural schematic diagram of an embodiment of a Fresnel lens of the present application;

[0012] Figure 5 It is a schematic cross-sectional structure diagram of the first state of the first fixing member, the Fresnel lens, and the pyroelectric sensor of the present application;

[0013] Figure 6 It is a schematic cross-sectional structure diagram of the first fixing member, the Fresnel lens, and the pyroelectric sensor in the second state of the present application;

[0014] Figure 7 It is a schematic cross-sectional structure diagram of the first fixing member, the Fresnel lens, and the pyroelectric sensor in the third state of the present application. DETAILED DESCRIPTION

[0015] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0016] The terms "first", "second" and the like in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that when used in this specification and the appended claims, the term "including" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. It should also be understood that the terms used in this specification of the application are only for the purpose of describing a specific embodiment and are not intended to limit the application. As used in this specification of the application and the appended claims, unless the context clearly indicates otherwise, the singular forms of "one", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this specification of the application and the appended claims refers to any combination of one or more of the items listed in association and all possible combinations, and includes these combinations.

[0017] It should be noted that when a certain element is fixed to another element, it includes directly fixing the element to the other element, or fixing the element to the other element through at least one other element in the middle. When an element is connected to another element, it includes directly connecting the element to the other element, or connecting the element to the other element through at least one other element in the middle.

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] This application first proposes a sensing device, such as Figures 1 to 7 As shown, the sensing device includes a shell component 10, a pyroelectric sensor 20, a Fresnel lens 30, and a moving component, wherein the pyroelectric sensor 20 is arranged on the shell component 10; the Fresnel lens 30 is arranged on the shell component 10, and includes at least two Fresnel fringe areas 310 with different focusing capabilities; one of the pyroelectric sensor 20 or the Fresnel lens 30 is fixedly connected to the shell component 10, and the other is movably connected to the shell component 10 through the moving component; wherein the pyroelectric sensor 20 and the Fresnel lens 30 move relative to each other to switch the Fresnel fringe area 310 corresponding to the pyroelectric sensor 20, thereby changing the focusing capability of the Fresnel lens 30 on the detection area, and further changing the detection distance of the sensing device.

[0020] The pyroelectric sensor 20 is a sensor that uses infrared rays to process data. The pyroelectric sensor 20 can detect infrared rays emitted by the human body and convert them into electrical signals for output. When some crystals are heated, charges of equal quantity and opposite signs will be generated at both ends of the crystals. This electric polarization phenomenon caused by thermal changes is called the pyroelectric effect. The pyroelectric sensor 20 uses the pyroelectric effect and is a temperature-sensitive sensor. The sensing device can use the pyroelectric sensor 20 to sense the human body in its detection area.

[0021] The detection area of ​​the sensing device is related to the detection area of ​​the pyroelectric sensor and the optical properties of the optical system. The detection area of ​​the pyroelectric sensor is the area where its receiving end can receive infrared radiation and generate an electrical signal. The detection area of ​​the pyroelectric sensor is determined by its internal structure, which mainly includes a series of pyrocouples in series, each of which is composed of two films of different materials, which form a thermal junction at the contact point. When the pyroelectric sensor is exposed to a temperature gradient, due to the Seebeck effect, the temperature difference between different materials causes electrons to flow from the high-temperature end to the low-temperature end, thereby generating an electrical signal. The establishment of the detection area of ​​the sensing device usually involves the design parameters of the pyroelectric sensor and the influence of the temperature gradient, the optical properties of the optical system, and environmental factors. The design parameters of the pyroelectric sensor determine the size and shape of its sensitive area (i.e., the detection area where sensing can be achieved). The layout of the pyroelectric element of the sensor can be designed according to the application requirements; further, when the sensing device uses the pyroelectric sensor for infrared sensing, its detection area is also affected by the optical system (such as a lens), which focuses or disperses the incident infrared radiation, thereby changing the size and shape of the detection area of ​​the entire sensing device.

[0022] Therefore, a common sensing device usually includes a pyroelectric sensor 20 and a corresponding Fresnel lens 30, and the detection distance of the sensing device varies depending on the focusing ability of the Fresnel lens 30. Since a common sensing device usually includes a pyroelectric sensor 20 and a Fresnel lens 30 whose focusing ability is not adjustable, the detection distance of the sensing device is generally fixed and has poor applicability in multiple scenarios.

[0023] The Fresnel lens 30 is made according to the Fresnel principle, and the Fresnel lens 30 achieves the focusing effect through the Fresnel fringe area 310 thereon. The Fresnel lens 30, also known as a Fresnel zone lens or a plane lens, is a lens that uses the diffraction principle of light to focus light. Compared with a traditional convex lens, the Fresnel lens 30 has a thinner structure and can be made by a simple manufacturing process. The focusing principle of the Fresnel lens 30 is based on diffraction and interference. The Fresnel fringe area 310 is a series of concentric rings or zones, each zone is equivalent to a tiny refractive element, and they act together on the incident light. The design of the Fresnel fringe area 310 on the Fresnel lens 30 is usually based on the Fresnel diffraction integral, and the optical properties of the Fresnel fringe area 310 are adjusted by accurately calculating the width and interval of each zone to control the phase difference of the light wave. In an application scenario, when parallel light is incident on the Fresnel fringe area 310, the light waves on different zones are diffracted and interfered on the other side of the lens. Since the phase relationship of light is taken into consideration during the design, these light waves will constructively interfere when they meet at the focal point of the lens, thereby enhancing the light intensity at that point and achieving a focusing effect. For example, in a solar energy concentrating system, the Fresnel lens 30 can focus sunlight onto a small area of ​​a receiver, thereby improving the utilization rate of solar energy.

[0024] The light-gathering ability of the Fresnel lens 30 is affected by its design parameters, including the diameter of the lens, the focal length, the number and width of the zones, etc. By optimizing these parameters, the desired light-gathering performance can be obtained. Therefore, the Fresnel lens 30 is used as an optical system in the sensing device to enhance the ability of the external infrared radiation to gather incident on the pyroelectric sensor 20, which can greatly increase the detection distance and detection angle of the pyroelectric sensor 20, and greatly increase the sensitivity of the pyroelectric sensor 20.

[0025] Therefore, in order to improve the structural simplicity of the sensing device, reduce the volume, and reduce the production design cost, the Fresnel lens 30 of this embodiment includes at least two Fresnel fringe areas 310 with different focusing capabilities (according to the above description, at least two Fresnel fringe areas 310 with different focusing capabilities can be formed on the Fresnel lens 30 by adjusting the design parameters of the lens), and the pyroelectric sensor 20 or the Fresnel lens 30 of this embodiment can be movably connected to the housing assembly 10 through a moving component, so it is convenient to switch the Fresnel fringe areas 310 with different focusing capabilities to be set correspondingly to the pyroelectric sensor 20. Specifically, the Fresnel lens 30 can focus the incident infrared radiation through the Fresnel fringe area 310. In an application scenario, the specific structure (such as the grain characteristics, etc.) of the Fresnel fringe area 310 can be designed according to the need for focusing capability, that is, the focusing capability of the Fresnel fringe area 310 can be changed by changing the structural characteristics of the Fresnel fringe area 310. Specifically, because the different structures of different Fresnel fringe areas 310 lead to different optical characteristics of different Fresnel fringe areas 310, different light-gathering capabilities of different Fresnel fringe areas 310 can be achieved. Since the stronger the light-gathering capability of the Fresnel fringe area 310, the infrared radiation in a farther area can be focused to enter the pyroelectric sensor 20, the stronger the light-gathering capability of the Fresnel fringe area 310, the pyroelectric sensor 20 can sense the infrared radiation in a farther area, that is, the stronger the light-gathering capability of the Fresnel fringe area 310, the longer the detection distance of the sensing device. Therefore, since the Fresnel lens 30 of the present embodiment includes at least two Fresnel fringe areas 310 with different light-gathering capabilities, after the switching of the Fresnel fringe area 310 is completed, the infrared rays can be transmitted to the pyroelectric sensor 20 through the switched Fresnel fringe area 310 (i.e., the above-mentioned corresponding setting is realized). Since the light-gathering capabilities of the Fresnel fringe areas 310 are different, switching the Fresnel fringe area 210 can make it easier to adjust the detection distance of the sensing device.

[0026] The beneficial effect of the above arrangement is that the sensing device of the present embodiment includes a housing assembly 10, a pyroelectric sensor 20, a Fresnel lens 30, and a moving assembly, and the Fresnel lens 30 includes at least two Fresnel fringe areas 310 with different light-gathering capabilities. The arrangement of the moving assembly is conducive to the relative movement between the pyroelectric sensor 20 and the Fresnel lens 30, so that it is easy to switch the Fresnel fringe areas 310 with different light-gathering capabilities to be set correspondingly to the pyroelectric sensor 20, thereby enabling infrared rays to be transmitted to the pyroelectric sensor 20 through one of the Fresnel fringe areas 310, thereby enabling the detection distance of the sensing device to be adjusted. Adjustment, so it can improve the multi-scenario applicability of the sensing device; further, the Fresnel lens 30 includes at least two Fresnel fringe areas 310 with different focusing capabilities, and the setting of the mobile component facilitates the switching of the Fresnel fringe areas 310 with different focusing capabilities to correspond to the pyroelectric sensor 20, so it can reduce the number of pyroelectric sensors 20, reduce the number of parts of the sensing device, reduce the production design cost, and can reduce the volume and improve the simplicity of the structure; further, the shell assembly 10 of this embodiment can realize the limitation of the pyroelectric sensor 20, the Fresnel lens 30, and the mobile component, and can improve the structural stability of the sensing device. Therefore, the sensing device of this embodiment can realize the adjustable detection distance, can improve the multi-scenario adaptability of the sensing device, reduce the number of parts, reduce the volume, improve the simplicity of the structure, and reduce the cost.

[0027] During use, the pyroelectric sensor 20 may be provided with connecting wires to communicate with external elements. In order to reduce interference to the operation of the line unit or the sensor, the Fresnel lens 30 may be moved to achieve relative movement between the Fresnel lens 30 and the pyroelectric sensor 20 .

[0028] Optionally, the pyroelectric sensor 20 is fixed on the housing assembly 10, the moving assembly includes a first rotating member 40, the Fresnel lens 30 is rotatably connected to the housing assembly 10 via the first rotating member 40, and at least two Fresnel fringe areas 310 are arranged in sequence along the rotation direction of the Fresnel lens 30.

[0029] Specifically, the Fresnel fringe areas 310 with different light-gathering capabilities are arranged in sequence along the rotation direction of the Fresnel lens 30. Therefore, as the Fresnel lens 30 rotates, it is possible to switch the Fresnel fringe areas 310 with different light-gathering capabilities to correspond to the pyroelectric sensor 20, so that infrared rays can be transmitted to the pyroelectric sensor 20 through different Fresnel fringe areas 310, thereby facilitating the adjustment of the detection distance of the sensing device.

[0030] Therefore, the above arrangement realizes the relative movement between the Fresnel lens 30 and the pyroelectric sensor 20 by the rotation of the Fresnel lens 30, and the pyroelectric sensor 20 is fixed on the housing assembly 10, which can reduce the interference of the movement on the normal working state of the pyroelectric sensor 20 (such as interference caused by poor contact, etc.), so this method can improve the reliability of the sensing device; further, the above arrangement makes the Fresnel lens 30 rotate through the first rotating member 40, and the first rotating member 40 can not only limit the Fresnel lens 30 and improve its position stability, but also realize the relative movement between the Fresnel lens 30 and the pyroelectric sensor 20 by rotation, which can make it easier to switch the Fresnel pattern area 310 with different focusing capabilities and the corresponding setting of the pyroelectric sensor 20, and the rotation setting can reduce the activity space required to be occupied during the relative movement between the Fresnel lens 30 and the pyroelectric sensor 20, so that the size of the sensing device can be further reduced, the design complexity can be reduced, and then the production cost of the sensing device can be reduced, so the integration and aesthetics of the sensing device can be improved.

[0031] Of course, in other embodiments, the relative movement between the Fresnel lens and the pyroelectric sensor may be achieved by the movement of the pyroelectric sensor or the joint movement of the Fresnel lens and the pyroelectric sensor, which is not specifically limited.

[0032] In other embodiments, the movement mode is not limited, for example, translation is also possible, and no specific limitation is made.

[0033] Optionally, the Fresnel lens 30 includes a side portion 31 and an end portion 32 , the side portion 31 is provided with at least two Fresnel pattern regions 310 , and the side portion 31 is arranged in an arc shape, and the end portion 32 is connected to the first rotating member 40 .

[0034] Specifically, the side portion 31 of the Fresnel lens 30 is bent into an arc, and the end portion 32 is connected to the side portion 31 .

[0035] Specifically, the connection method between the end portion 32 and the side portion 31 is not limited. For example, the end portion 32 and the side portion 31 may be connected by gluing or other methods; in other embodiments, the end portion 32 and the side portion 31 may be integrally formed. For example, the side portion 31 and the end portion 32 of the Fresnel lens 30 may be formed by injection molding, which is a commonly used method for manufacturing the Fresnel lens 30. The mold of the Fresnel lens 30 may be designed first, and then the molten plastic may be injected into the mold under high temperature and high pressure, and the molded lens may be obtained after cooling and solidification. Injection molding is suitable for mass production, has low cost, and can achieve precise manufacturing of complex shapes.

[0036] The beneficial effect of the above arrangement is that the side portion 31 of the Fresnel lens 30 is arranged in an arc shape, and is provided with at least two Fresnel pattern areas 310, so that the Fresnel pattern areas 310 with different focusing capabilities can be switched by rotation and are arranged corresponding to the pyroelectric sensor 20, and the structure is simple; the end portion 32 of the Fresnel lens 30 is connected to the first rotating member 40, so as to improve the structural stability of the Fresnel lens 30.

[0037] Optionally, the pyroelectric sensor 20 is arranged at the center of the arc.

[0038] The side portion 31 of the Fresnel lens 30 is arranged in an arc shape. The side portion 31 of the Fresnel lens 30 is bent to form an arc shape. The pyroelectric sensor 20 is arranged at the center of the arc.

[0039] This arrangement facilitates controlling the rotation of the Fresnel lens 30 to achieve the corresponding arrangement of the Fresnel fringe areas 310 with different focusing capabilities and the pyroelectric sensor 20 , thereby facilitating improving the infrared focusing effect of the Fresnel fringe area 310 on the pyroelectric sensor 20 .

[0040] In other embodiments, the side of the Fresnel lens is surrounded to form a cylinder, and the pyroelectric sensor is arranged at the center of the circle, that is, at the center of the cylinder.

[0041] Optionally, the moving component further includes a first fixing member 50 , which is connected to the first rotating member 40 ; the Fresnel lens 30 is connected to the first fixing member 50 to enclose and form a hollow cavity 01 , and the pyroelectric sensor 20 is disposed in the hollow cavity 01 .

[0042] In one application scenario, the Fresnel lens 30 is fixed on the first fixing member 50, and the first fixing member 50 rotates synchronously with the Fresnel lens 30. The first fixing member 50 is connected to the first rotating member 40 to realize the connection between the Fresnel lens 30 and the first rotating member 40, which can improve the structural stability of the Fresnel lens 30; further, the Fresnel lens 30 and the first fixing member 50 are enclosed and connected to form a hollow cavity 01, and the pyroelectric sensor 20 is arranged in the hollow cavity 01, which is convenient for realizing the switching of the Fresnel pattern area 310 with different focusing capabilities and the corresponding arrangement of the pyroelectric sensor 20 when the Fresnel lens 30 rotates, and can reduce the interference of the Fresnel lens 30 on the pyroelectric sensor 20 when the Fresnel lens 30 rotates, and can reduce the interference of the external environment on the pyroelectric sensor 20, so that the reliability of the sensing device can be improved, and it is convenient for production and assembly. Of course, in other embodiments, the Fresnel lens can be directly connected to the first rotating member, and the connection between the Fresnel lens and the first rotating member can be realized, and there is no specific limitation.

[0043] In an application scenario, such as Figure 3As shown, the Fresnel lens 30 is enclosed and connected with the first fixing member 50 to form a cylinder and a hollow cavity 01, which is convenient for rotation. Of course, in other embodiments, the specific shape of the structure formed by the enclosed connection of the Fresnel lens and the first fixing member is not limited, as long as a hollow cavity can be formed, and no specific limitation is made.

[0044] Of course, in other embodiments, the Fresnel lens can form a cylinder and a hollow cavity alone, which is not specifically limited.

[0045] Optionally, an avoidance hole 02 is provided on the first fixing member 50, and the sensing device also includes a second fixing member 60, one end of the second fixing member 60 is connected to the pyroelectric sensor 20, and the other end of the second fixing member 60 extends through the avoidance hole 02 to the outside of the hollow cavity 01 and is fixedly connected to the shell assembly 10.

[0046] Specifically, the second fixing member 60 can fix the pyroelectric sensor 20 so as to fix the pyroelectric sensor 20 in the hollow cavity 01 .

[0047] The beneficial effect of the above-mentioned arrangement is that the avoidance hole 02 is provided on the first fixing member 50, so that the second fixing member 60 can pass through the avoidance hole 02 and extend to the outside of the hollow cavity 01 to be fixedly connected to the shell assembly 10, so as to facilitate fixing the pyroelectric sensor 20 on the shell assembly 10. Therefore, the arrangement of the avoidance hole 02 and the second fixing member 60 can improve the convenience of installation and fixation of the pyroelectric sensor 20 and improve the position stability of the pyroelectric sensor 20.

[0048] Optionally, in an application scenario, such as Figure 3 As shown, the Fresnel lens 30 is enclosed and connected with the first fixing member 50 to form a cylinder and a hollow cavity 01. The Fresnel lens 30 is fixed on the first fixing member 50, and the first fixing member 50 rotates synchronously with the Fresnel lens 30. Among them, the first fixing member 50 includes an end and a side portion. The side portion of the first fixing member 50 is enclosed and connected with the side portion 31 of the Fresnel lens 30 to form the side wall of the cylinder, and the end portion of the first fixing member 50 is connected with the end portion 32 of the Fresnel lens 30 to form the bottom wall of the cylinder. The avoidance hole 02 is arranged on the side portion of the first fixing member 50 and extends along the rotation direction of the first fixing member 50. This arrangement can reduce the rotation interference of the second fixing member 60 on the first fixing member 50 and the Fresnel lens 30.

[0049] Of course, in other embodiments, the avoidance hole can also be set on the bottom wall of one end of the cylinder, one end of the second fixing member is connected to the pyroelectric sensor, and the other end of the second fixing member extends through the avoidance hole on the end wall to the outside of the hollow cavity and is fixedly connected to the shell assembly.

[0050] Optionally, the first rotating member 40 includes a magnetic encoding switch.

[0051] The magnetic encoder switch is a magnetic encoder that can obtain rotational position information by detecting changes in the magnetic field and convert it into electrical signal output.

[0052] Specifically, when the Fresnel lens 30 rotates, the magnetic encoding switch can provide damping to limit the rotation of the Fresnel lens 30, and can also obtain rotation angle information to output to external components such as a mobile phone.

[0053] The setting of the magnetic encoding switch facilitates the rotation limit of the Fresnel lens 30, improves the position stability of the Fresnel lens 30 during and after rotation, and can obtain the rotation angle information and output it to external components, so that the user can know the rotation angle information of the Fresnel lens 30, thereby making it convenient for the user to know the current detection distance of the sensing device, thereby making it convenient for the user to adjust the detection distance of the sensing device.

[0054] Optionally, the magnetic switch includes a wireless communication module and / or a wired communication module to achieve signal transmission with external components. In one application scenario, the magnetic switch can transmit the rotation angle information to the application software of the mobile phone through the wireless communication module, and the user can view the rotation angle and / or the corresponding detection distance in real time through the application software.

[0055] Optionally, in an application scenario, such as Figure 2 , Figure 3 As shown, the first fixing member 50 includes a main body 51 and a rotating shaft 52. The main body 51 is connected to the Fresnel lens 30 to form a hollow cavity 01. The rotating shaft 52 is fixedly connected to the first rotating member 40 (such as a magnetic encoding switch). The first rotating member 40 is rotatably connected to the shell assembly 10, so that the Fresnel lens 30 is rotatably connected to the shell assembly 10.

[0056] By setting the first fixing member 50 to be fixedly connected to the Fresnel lens 30, the first rotating member 40 (such as a magnetic encoding switch) and the Fresnel lens 30 are fixedly connected, so as to improve the position stability of the Fresnel lens 30. In an application scenario, when the Fresnel lens 30 rotates, the Fresnel lens 30 drives the first fixing member 50 to rotate, and then drives the magnetic encoding switch to rotate. The magnetic encoding switch can therefore obtain the rotation angle, provide damping for the rotation, and realize rotation limiting, so that the Fresnel lens 30 can be stably stationary at a position after rotating a certain angle.

[0057] Alternatively, if Figure 2 As shown, a recessed portion is provided on the rotating shaft 52, and a raised portion is provided on the magnetic switch, and the raised portion and the recessed portion are fixed in position to achieve fixed position limiting of the rotating shaft 52 and the magnetic switch. Of course, in other embodiments, the rotating shaft and the magnetic switch can be fixedly connected, the first fixing member can be fixedly connected to the magnetic switch, or the Fresnel lens can be fixedly connected to the magnetic switch by welding, gluing, etc., which are not specifically limited.

[0058] Alternatively, if Figure 1 As shown, the sensing device further includes a third fixing member 80 , which is fixedly connected to the housing assembly 10 and rotatably connected to the magnetic encoding switch, that is, the magnetic encoding switch is rotatably connected to the housing assembly 10 through the third fixing member 80 .

[0059] In other embodiments, the magnetic encoding switch may also be fixedly connected to the housing assembly and rotatably connected to the Fresnel lens 30 , which will not be described in detail.

[0060] Since different light-gathering capabilities of the Fresnel fringe regions 310 will result in different detection distances of the sensing device, in order to improve the convenience of adjusting the detection distance of the sensing device, the arrangement of the Fresnel fringe regions 310 with different light-gathering capabilities may be optimized.

[0061] Optionally, the light-gathering capabilities of at least two Fresnel fringe regions 310 increase sequentially along the arrangement direction of the Fresnel fringe regions 310 .

[0062] In an application scenario, such as Figure 1 , Figures 4 to 7 As shown, the first fixing member 50 and the Fresnel lens 30 are enclosed to form a cylinder, and the Fresnel lens 30 can rotate around the central axis of the cylinder. The first Fresnel fringe area 311, the second Fresnel fringe area 312, and the third Fresnel fringe area 313 are arranged in sequence along the rotation direction of the Fresnel lens. The light-gathering capabilities of the first Fresnel fringe area 311, the second Fresnel fringe area 312, and the third Fresnel fringe area 313 are successively reduced according to the arrangement order of the Fresnel fringe area 310, that is, the relationship of the light-gathering capabilities of the three is the first Fresnel fringe area 311> the second Fresnel fringe area 312> the third Fresnel fringe area 313. In other embodiments, it can also be set to increase in sequence, that is, the relationship of the light-gathering capabilities of the three is the first Fresnel fringe area 311< the second Fresnel fringe area 312< the third Fresnel fringe area 313. It is not limited to the specific.

[0063] This arrangement enables the user to adjust the detection distance of the sensing device by adjusting the relative movement of the pyroelectric sensor 20 and the Fresnel lens 30, so that the detection distance can be adjusted from far to near or from near to far, which conforms to the user's common sense and improves the user experience.

[0064] The stronger the light-gathering capability of the Fresnel lens 30 is, the longer the detection distance is. Figures 4 to 7As shown, the side portion 31 of the Fresnel lens 30 is arranged in an arc shape, and the center angle corresponding to the arc is 180°. The Fresnel lens 30 includes a first Fresnel fringe area 311, a second Fresnel fringe area 312, and a third Fresnel fringe area 313, whose light focusing capabilities decrease in sequence. The center angles corresponding to the first Fresnel fringe area 311, the second Fresnel fringe area 312, and the third Fresnel fringe area 313 are all 60°. Figure 7 As shown, when the first Fresnel fringe area 311 is set corresponding to the pyroelectric sensor 20, the detection distance of the sensing device is far; Figure 5 As shown, when the second Fresnel fringe area 312 is set corresponding to the pyroelectric sensor 20, the detection distance of the sensing device is mid-range; Figure 6 As shown, when the third Fresnel fringe area 313 is arranged corresponding to the pyroelectric sensor 20, the detection distance of the sensing device is close.

[0065] Since the angle of the central angle corresponding to the Fresnel pattern area 310 will also affect its focusing effect, this setting can not only make the detection distance of the sensing device meet the daily use needs of users and improve practicality, but also increase the options for the detection distance of the sensing device, improve the multi-scene applicability of the sensing device, and improve the user experience; the side 31 of the Fresnel lens 30 is set in an arc shape, and the central angle corresponding to the arc is 180°, which is convenient for setting the first fixing member 50 and the avoidance hole 02 on the first fixing member 50, and can improve the angle of the central angle corresponding to the side 31 of the Fresnel lens 30 while improving the rotational stability of the Fresnel lens 30.

[0066] Optionally, in an application scenario, when the rotation angle of the Fresnel lens 30 is set to 0°, the detection distance of the sensing device is mid-range.

[0067] Optionally, the detection distance of the sensing device can be set to near range, with a detectable distance of 5-7 meters; the detection distance of the sensing device can be set to medium range, with a detectable distance of 7-9 meters; the detection distance of the sensing device can be set to far range, with a detectable distance of more than 9 meters. This setting is in line with the user's daily application scenarios and improves the scenario applicability of the sensing device.

[0068] Optionally, in other embodiments, the light-gathering capabilities of at least two Fresnel fringe regions 310 may further decrease in sequence along their arrangement direction according to their arrangement order, which is not specifically limited.

[0069] In other embodiments, two or four or more Fresnel pattern areas with different light-gathering capabilities may be provided on the side of the Fresnel lens, and the arrangement of multiple Fresnel pattern areas may be achieved by adjusting the angle of the central angle corresponding to the Fresnel pattern area or the angle of the central angle corresponding to the side of the Fresnel lens.

[0070] Optionally, the Fresnel fringe area 310 of the Fresnel lens 30 may be adjusted based on the application scenario of the product, for example, the fringe characteristics of the Fresnel fringe area 310 may be adjusted to adjust the optional detection distance of the sensing device.

[0071] Optionally, the user may manually control the rotation of the Fresnel lens 30 to adjust the detection distance of the sensing device.

[0072] Optionally, the sensing device includes a driving member, which is transmission-connected to the Fresnel lens 30, the pyroelectric sensor 20 or a moving component (e.g., the first rotating member 40), and is used to drive the pyroelectric sensor 20 and the Fresnel lens 30 to move relative to each other, thereby switching at least one of the two Fresnel fringe areas 310 to a setting corresponding to the pyroelectric sensor 20, so that infrared rays are transmitted to the pyroelectric sensor 20 through the corresponding Fresnel fringe area 310, thereby realizing the adjustment of the detection distance of the sensing device.

[0073] Alternatively, if Figure 2 As shown, the sensing device further includes a printed circuit board 70 (PCB), the pyroelectric sensor 20 is arranged on the PCB, and the PCB is arranged on the second fixing member 60 .

[0074] Optionally, the driving member of this embodiment may be a motor, a cylinder, etc., or may be manual without limitation.

[0075] Optionally, in some embodiments, the housing assembly 10 is provided with a slot, the Fresnel lens 30 is at least partially located in the slot, and the Fresnel pattern area 310 is arranged toward the opening direction of the slot. This arrangement facilitates the fixing of the Fresnel lens 30, and the Fresnel pattern area 310 is arranged toward the opening direction of the slot, which can reduce the shielding effect of the housing assembly 10 on infrared rays and improve the sensing effect of the sensing device.

[0076] In other embodiments, similar improvements may be made to the sensing device, which will not be described in detail here.

[0077] The present application further proposes a camera device, which includes the above-mentioned sensing device and a lens, wherein the sensing device is fixed to the lens through a housing assembly and is in communication connection with the lens, the camera area of ​​the lens at least partially overlaps with the detection area of ​​the sensing device, and the lens works based on the detection result of the sensing device.

[0078] In one application scenario, the lens includes an image acquisition component and a control chip. The control chip communicates with the sensing device and controls the image acquisition component to work based on the detection result of the sensing device. The camera area of ​​the lens overlaps at least partially with the detection area of ​​the sensing device. For example, in one application scenario, when the sensing device detects that there is a human body in the detection area, the lens can start shooting based on the detection result of the sensing device.

[0079] The specific implementation and working principle of the sensing device can be found in the above embodiments and will not be described in detail here.

[0080] The beneficial effect of this arrangement is that the lens communicates with the sensing device and can work based on the detection results of the sensing device, thereby improving the functional diversity and sensitivity of the camera device.

[0081] Optionally, the camera device of this embodiment includes a security camera, which can be used in various security scenarios such as doorbell camera, home monitoring, etc. The security camera is a collection device that converts light images on the target surface of the image sensor from the visible light to the near infrared spectrum into video image signals for the purpose of security video monitoring.

[0082] Optionally, the lens further includes a second rotating assembly, and the second rotating assembly is used to control the rotation of the lens. Specifically, the second rotating assembly can control the rotation of the lens. It should be noted that the rotation of the lens and the rotation of the Fresnel lens are independent of each other and do not interfere with each other.

[0083] Optionally, the camera device further comprises a controller, which is in communication with the sensing device, and the controller can control the lens to start shooting based on the detection result of the sensing device. This setting can improve the sensitivity of the camera device.

[0084] Optionally, the camera device further includes a driving member, and the controller can control the driving member to drive the second rotating assembly to operate based on the detection result of the sensing device to realize rotation control of the lens.

[0085] Different from the prior art, the sensing device of the present application includes a shell component, a pyroelectric sensor, a Fresnel lens, and a moving component, and the Fresnel lens includes at least two Fresnel fringe areas with different focusing capabilities. The setting of the moving component is conducive to the relative movement between the pyroelectric sensor and the Fresnel lens, so it is convenient to switch the Fresnel fringe areas with different focusing capabilities to correspond to the pyroelectric sensor, and then the infrared light can be transmitted to the pyroelectric sensor through one of the Fresnel fringe areas, so that the detection distance of the sensing device can be adjusted, so that the multi-scenario applicability of the sensing device can be improved; further, the Fresnel lens includes at least two Fresnel fringe areas with different focusing capabilities, and the setting of the moving component is convenient to switch the Fresnel fringe areas with different focusing capabilities to correspond to the pyroelectric sensor, so that the number of pyroelectric sensors and the number of parts of the sensing device can be reduced, the production design cost can be reduced, and the volume can be reduced, and the structural simplicity can be improved; further, the shell component of the present application can limit the pyroelectric sensor, the Fresnel lens, and the moving component, and the structural stability of the sensing device can be improved. Therefore, the sensing device of the present application can achieve adjustable detection distance, can improve the multi-scenario adaptability of the sensing device, reduce the number of components, reduce the volume, improve structural simplicity, and reduce costs.

[0086] It is worth noting that the drawings in this article are only intended to illustrate the structural relationship and connection relationship of the product of the present application, and do not limit the specific structural dimensions of the product of the present application.

[0087] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A sensing device, characterized in that: It includes a housing component, a pyroelectric sensor, a Fresnel lens and a moving component arranged on the housing component; The Fresnel lens includes at least two Fresnel fringe regions with different light-gathering capabilities; One of the pyroelectric sensor and the Fresnel lens is fixedly connected to the housing assembly, and the other is movably connected to the housing assembly via the moving assembly; The pyroelectric sensor and the Fresnel lens move relative to each other to switch the Fresnel fringe area corresponding to the pyroelectric sensor.

2. The sensing device according to claim 1, characterized in that: The pyroelectric sensor is fixed on the housing assembly, the moving assembly includes a first rotating member, and the Fresnel lens is rotatably connected to the housing assembly via the first rotating member; The at least two Fresnel fringe areas are arranged in sequence along the rotation direction of the Fresnel lens.

3. The sensing device according to claim 2, characterized in that: The Fresnel lens comprises a side portion and an end portion, the side portion is provided with the at least two Fresnel pattern areas, and the side portion is arranged in an arc shape, and the end portion is connected to the first rotating member.

4. The sensing device according to claim 3, characterized in that: The pyroelectric sensor is arranged at the center of the arc.

5. The sensing device according to claim 2, characterized in that: The mobile component also includes: a first fixed member connected to the first rotating member; The Fresnel lens is connected to the first fixing member to form a hollow cavity, and the pyroelectric sensor is arranged in the hollow cavity.

6. The sensing device according to claim 5, characterized in that: The first fixing member comprises: A main body part, connected and enclosed with the Fresnel lens to form the hollow cavity; A rotating shaft, fixedly connected to the first rotating member; The first rotating member is rotatably connected to the housing assembly, so that the Fresnel lens is rotatably connected to the housing assembly.

7. The sensing device according to claim 5, characterized in that: The first fixing member is provided with an avoidance hole, and the sensing device further comprises: A second fixing member has one end connected to the pyroelectric sensor, and the other end extends through the avoidance hole to the outside of the hollow cavity and is fixedly connected to the shell assembly.

8. The sensing device according to claim 2, characterized in that: The first rotating member includes a magnetic encoding switch.

9. The sensing device according to claim 1, characterized in that: The light-gathering capabilities of the at least two Fresnel fringe regions are arranged sequentially along their arrangement direction.

10. A camera device, characterized in that: include: Lens; The sensing device according to any one of claims 1 to 9; The sensing device is fixed on the lens through the shell assembly and is in communication connection with the lens. The imaging area of ​​the lens at least partially overlaps with the detection area of ​​the sensing device, and the lens works based on the detection result of the sensing device.

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