Sensing device

Abstract

The utility model provides an induction device which comprises a shell, a first circuit board and a second circuit board, and the shell is provided with an induction cover towards an induction area; the first circuit board is arranged on the inner side of the shell, an infrared induction module is arranged on the face, facing the induction cover, of the first circuit board, and the infrared induction module is provided with an infrared induction face. The second circuit board is arranged on the side, facing the induction cover, of the first circuit board, a radar induction module is arranged on the second circuit board, the radar induction module is provided with a transmitting surface, and the transmitting surface is arranged facing the induction cover; a preset distance is arranged between the second circuit board and the first circuit board, so that the distance between the emitting surface and the first circuit board is larger than the distance between the infrared induction surface and the first circuit board, and radar detection waves are not easy to be interfered by the infrared induction module.

Description

Technical Field

[0001] The utility model relates to the field of sensors, in particular to a sensing device. Background Art

[0002] With the development of smart homes, people's demand for smart life is getting higher and higher. To realize smart home scenes, smart sensing devices are indispensable. Only by obtaining accurate sensing results can a reliable execution basis be provided for terminal devices in smart scenes.

[0003] There are two types of human body sensing devices on the market, one is pyroelectric infrared sensor and the other is radar sensor. Pyroelectric infrared sensor can passively detect infrared light emitted by human body and judge whether there is someone by the change of infrared light. Its advantages are power saving and low cost, but its disadvantage is that it cannot detect stationary human body. Radar sensor can actively emit radar detection wave and receive reflected radar detection wave, and judge whether there is moving human body or object in the detection area based on Doppler principle. Its advantage is that it can detect slight movement of human body, and can detect whether there is someone by breathing and heartbeat when human body is stationary. Its disadvantage is that the detection result is easily disturbed by moving objects such as electric fans, and it still needs to continue to emit radar detection wave when there is no one, resulting in high power consumption.

[0004] In the embodiments of the utility model, the inventors tried to integrate the pyroelectric infrared sensor and the radar sensor together to explore a method of reducing the power consumption of the radar sensor. However, there are technical difficulties in integrating the pyroelectric infrared sensor and the radar sensor together: the radar detection wave emitted by the radar sensor is easily interfered by the pyroelectric infrared sensor, resulting in a decrease in the detection performance of the radar sensor. Utility Model Content

[0005] One purpose of the utility model is to provide a sensing device, wherein the sensing device realizes dual sensing of human body movement and micro-movement by combining a radar sensing module and an infrared sensing module, thereby greatly reducing the power consumption of the sensing device and avoiding the situation where the human body cannot be detected when it is not moving, and perfectly combines the advantages of the radar sensing module and the infrared sensing module.

[0006] Another object of the present utility model is to provide a sensing device, wherein the emitting surface is made higher than the infrared sensing surface by controlling the preset distance L3, so that the radar detection wave emitted by the emitting surface is not easily interfered by the infrared sensing module.

[0007] Another object of the utility model is to provide a sensing device, in which the preset spacing L3 is set as an important dimension that needs to be strictly controlled during the design and manufacturing process, thereby indirectly ensuring that the distance between the emitting surface and the infrared sensing surface meets the requirements, greatly reducing the difficulty of design and manufacturing, and ensuring the yield rate of the product.

[0008] Another object of the utility model is to provide a sensing device, in which two circuit boards are connected by a pin header and a female header, which not only realizes the electrical connection between the circuit boards, but also simplifies the connection relationship between the circuit boards to facilitate assembly, maintenance and replacement; at the same time, it also makes the positioning between the first circuit board and the second circuit board more accurate, ensuring the accurate positional relationship between the infrared sensing module and the radar sensing module. In addition, the first circuit board supports and positions the second circuit board through the pin header and the female header, making the structure more compact, which is conducive to reducing the volume of the sensing device and adapting to the trend of miniaturization.

[0009] Another object of the utility model is to provide a sensing device, wherein the first circuit board uses two female connectors to support the second circuit board, which not only improves the structural stability but also ensures the parallelism between the second circuit board and the first circuit board, so that the sensing direction of the radar sensing module is consistent with the sensing direction of the infrared sensing module.

[0010] Another object of the utility model is to provide a sensing device, in which the spacing between the first circuit board and the second circuit board is effectively controlled by fitting a pin header and a female header, and the accuracy of the preset spacing L3 can be guaranteed without other positioning structures or supporting structures, which simplifies the assembly process and saves space inside the shell, making the structure more compact.

[0011] Another object of the utility model is to provide a sensing device, wherein a preset spacing L3 is determined only by the height of the pin header and the mother header. If it is necessary to change the spacing L4 between the emitting surface and the sensing cover, it is only necessary to replace the pin header and the mother header of different types without redesigning the structure or changing the mold. This allows some parts of the sensing device to be commonly used in radar sensing modules of different wavelengths, saving material and mold costs.

[0012] Another object of the utility model is to provide a sensing device, wherein the abutment portion limits the movement of the second circuit board in a direction away from the pin header and the socket header, so that the position of the second circuit board in the vertical direction is stably limited between the abutment portion and the pin header or the socket header, thereby preventing the connection effect between the second circuit board and the first circuit board from being affected due to accidental falling, and the abutment portion can prevent the position or angle of the second circuit board from changing, thereby further improving the reliability and service life of the entire device.

[0013] Another object of the utility model is to provide a sensing device, wherein the frequency of the radar detection wave is between 55GHz-80GHz, and its wavelength in the air is between 3.75mm-5.45mm, which is a millimeter wave with a shorter wavelength. It has a higher resolution and can achieve more accurate detection and identification of target objects.

[0014] Another object of the utility model is to provide a sensing device, wherein the separate molding of the lens component and the sensing cover has the following beneficial effects: 1. It is conducive to ensuring the injection molding accuracy of the lens component; 2. The lens component and the sensing cover can be manufactured using different materials, which not only ensures the optical performance of the lens component, but also enables the sensing cover to use a material with a low dielectric constant; 3. Standard parts can be selected for the lens component to reduce manufacturing costs.

[0015] Another object of the utility model is to provide a sensing device, wherein the lens member is sunken into the sensing cover, thereby reducing the shielding of the radar detection wave by the lens member, so that the detection range of the radar sensing module is larger.

[0016] Another object of the present utility model is to provide a sensing device, wherein L2>2L1, and the lens component is arranged at a non-central position of the sensing cover, and the infrared sensing module and the radar sensing module are distributed on the left and right, so that the infrared sensing module and the radar sensing module have a large spacing in the horizontal direction and the vertical direction, thereby reducing the interference of the infrared sensing module on the radar sensing module.

[0017] Another object of the present invention is to provide a sensing device, wherein a lens component is integrally formed with a sensing cover to improve assembly efficiency and enhance the sealing performance between the lens component and the sensing cover.

[0018] Another object of the utility model is to provide a sensing device, wherein the sensing cover is integrally provided with a Fresnel lens pattern, the Fresnel lens pattern forms a lens component, and the advantage of using the Fresnel lens pattern is that the thickness is very thin, which can further reduce the shielding of the radar sensor by the lens component.

[0019] Another object of the present utility model is to provide a sensing device, wherein the frequency of the radar detection wave is set between 20 GHz and 30 GHz, so that the detection performance of the radar sensing module is less affected by the Fresnel lens texture.

[0020] Another object of the utility model is to provide a sensing device, wherein the housing does not need additional openings or light-transmitting windows to install the light-emitting unit and the light-sensitive sensing module, thereby simplifying the structure and improving the integrity of the sensing device. At the same time, there is no need to design an additional waterproof structure, thereby reducing manufacturing costs and improving assembly efficiency.

[0021] Another object of the utility model is to provide a sensing device, wherein the minimum distance between the sensing cover and the emitting surface is greater than λ / 10 to reduce the reflection and interference of the sensing cover to the radar detection wave; the maximum distance between the sensing cover and the emitting surface is less than 3λ / 4 to reduce the reflection and interference of the inner wall of the shell to the radar detection wave.

[0022] Another object of the utility model is to provide a sensing device, wherein d satisfies the relationship: λm / 4<d<3λm / 4, so as to ensure the penetration efficiency of the radar detection wave and reduce the loss of the radar detection wave. Furthermore, the sensing cover within this thickness range can block a portion of external non-desirable electromagnetic waves and improve the reliability of the radar sensing module.

[0023] Another object of the utility model is to provide a sensing device, which is powered by a battery, so that the sensing device is movable, the installation position is not restricted by the power line, and the installation is more convenient.

[0024] Another object of the utility model is to provide a sensing device, wherein the sensing device has waterproof performance and can be used in a humid environment.

[0025] In order to achieve at least one of the above purposes, the utility model provides a sensing device capable of sensing the movement and micro-movement of a human body in a sensing area, the sensing device comprising a shell, a first circuit board and a second circuit board; the shell is provided with a sensing cover facing the sensing area; the first circuit board is arranged on the inner side of the shell, and an infrared sensing module is arranged on a side of the first circuit board facing the sensing cover, the infrared sensing module has an infrared sensing surface, and the infrared sensing surface is used to sense the movement of a human body in the sensing area; the second circuit board is arranged on a side of the first circuit board facing the sensing cover, and a radar sensing module is arranged on the second circuit board, the radar sensing module has an emitting surface, the emitting surface is arranged toward the sensing cover, the emitting surface can emit a radar detection wave, the radar detection wave passes through the sensing cover and is emitted to the outside, and is used to detect the micro-movement of a human body in the sensing area; a preset distance is provided between the second circuit board and the first circuit board, so that the distance between the emitting surface and the first circuit board is greater than the distance between the infrared sensing surface and the first circuit board.

[0026] Furthermore, one of the first circuit board and the second circuit board is provided with a pin header, and the other is provided with a female header, and the pin header is inserted into the female header to realize electrical connection between the first circuit board and the second circuit board; wherein, the second circuit board is mounted on the first circuit board by the pin header and the female header, and the pin header and the female header support and position the second circuit board.

[0027] Furthermore, the pin row has a third surface arranged toward the mother row, and the mother row has a fourth surface arranged toward the pin row. When the pin row is inserted into the mother row, the third surface is attached to the fourth surface, so that the preset spacing is controlled by the height of the pin row and the mother row.

[0028] Furthermore, the induction cover is provided with an abutment portion toward the second circuit board, and the abutment portion abuts against a side of the second circuit board away from the pin header and the socket header to limit the second circuit board from moving in a direction away from the pin header and the socket header.

[0029] In some embodiments, the first circuit board is provided with two female headers facing the second circuit board, and the second circuit board is provided with two pin headers. The two pin headers are respectively inserted into the two female headers, and the two female headers support the second circuit board in a balanced manner.

[0030] In some embodiments, the sensing cover is provided with a lens component, the center of the lens component corresponds to the center of the infrared sensing surface, and the lens component is used to converge light onto the infrared sensing surface.

[0031] Furthermore, the frequency of the radar detection wave is between 55GHz and 80GHz, the sensing cover is provided with a lens mounting hole at a position directly opposite to the infrared sensing module, and the lens component is embedded and installed in the lens mounting hole; the sensing cover is recessed downward in the area around the lens mounting hole so that the lens component sinks into the sensing cover; the distance between the emitting surface and the first circuit board is L2, and the distance between the infrared sensing surface and the first circuit board is L1, then L2>2L1; the lens component is arranged at a non-central position of the sensing cover, and the infrared sensing module and the radar sensing module are distributed on the left and right.

[0032] In some embodiments, the sensing cover is integrally provided with Fresnel lens patterns, and the Fresnel lens patterns form the lens element; the Fresnel lens patterns cover the emitting surface and the infrared sensing surface, and the frequency of the radar detection wave is between 20 GHz and 30 GHz.

[0033] In some embodiments, the sensing cover and the lens member are both made of light-transmitting materials; the first circuit board is provided with a light-emitting unit within the coverage range of the lens member and / or the coverage range of the sensing cover, and the light emitted by the light-emitting unit is displayed to the outside through the lens member and / or the sensing cover; the second circuit board is provided with a light-sensitive sensing module within the coverage range of the sensing cover, and the ambient light is irradiated to the light-sensitive sensing module through the sensing cover.

[0034] In some embodiments, the wavelength of the radar detection wave propagating in the air is λ, the minimum distance between the sensing cover and the emitting surface is greater than λ / 10, and the maximum distance is less than 3λ / 4; the frequency of the radar detection wave is between 55GHz-80GHz, and the wavelength of the radar detection wave propagating in the sensing cover is λm, wherein the thickness of the sensing cover at the corresponding position of the radar sensing module is d, and d satisfies the relationship: λm / 4<d<3λm / 4; a battery is arranged inside the shell, and the battery is electrically connected to the first circuit board; the shell is constructed as a cylindrical structure with two open ends, which has a first open end and a second open end, the sensing cover is sealed and connected to the first open end, and the second open end cover is provided with a first end cover, and a sealing ring is arranged between the first end cover and the shell to form a closed space inside the shell; an electronic switch is arranged on the edge of the first circuit board, and the trigger rod of the electronic switch protrudes from the first circuit board, and a button hole is opened on the side wall of the shell at the corresponding position of the electronic switch, and a silicone button is embedded in the button hole, and the silicone button is used to trigger the electronic switch, wherein the silicone button is sealed and connected to the shell.

[0035] It should be understood that the above general description and the following detailed description are only exemplary and explanatory and cannot limit the present invention. The above utility model contents can be combined arbitrarily, and these and other purposes of the present utility model will be fully reflected through the following detailed description and drawings.

[0036] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0039] Figure 2 It is a structural explosion diagram of an embodiment of the utility model;

[0040] Figure 3 It is an exploded view of the induction cover, the first circuit board and the second circuit board of one embodiment of the utility model;

[0041] Figure 4This is a schematic diagram of the structure of a first circuit board in one embodiment of the utility model;

[0042] Figure 5 This is a schematic diagram of the structure of a second circuit board in one embodiment of the utility model;

[0043] Figure 6 It is a side view of a first circuit board, a second circuit board and an electronic component of an embodiment of the utility model;

[0044] Figure 7 It is a cross-sectional view of the induction cover, the lens component, the first circuit board, the second circuit board and the electronic components of one embodiment of the utility model;

[0045] Figure 8 It is a schematic diagram of the assembly between the induction cover, the lens component and other structures of one embodiment of the utility model;

[0046] Fig. 9 This is an exploded view of a portion of the structure of an embodiment of the utility model after the shell is cut open;

[0047] Fig.10 It is a three-dimensional cross-sectional view of an embodiment of the utility model;

[0048] Fig.11 It is a schematic diagram of the assembly between the adjustment component and the housing in one embodiment of the utility model;

[0049] Fig.12 This is a schematic diagram of the connection between the induction device and the circular iron sheet in one embodiment of the utility model;

[0050] Fig.13 This is an exploded view of an adjustment component of an embodiment of the utility model;

[0051] Fig.14 This is a schematic diagram of the angle adjustment of the adjustment component of an embodiment of the utility model;

[0052] Fig.15 is a side view of the sensing device of one embodiment of the utility model in the second state;

[0053] Fig.16 is a side view of the sensing device of one embodiment of the utility model in a third state;

[0054] Fig.17 It is a cross-sectional view of the induction cover, the lens component, the first circuit board, the second circuit board and the electronic components of one embodiment of the utility model;

[0055] Fig.18 It is a schematic diagram of the assembly between the induction cover, the lens component and other structures of one embodiment of the utility model;

[0056] Fig.19It is a cross-sectional view of a sensing cover, a lens component, a first circuit board, a second circuit board and electronic components according to an embodiment of the utility model. DETAILED DESCRIPTION

[0057] In the description of the present invention, the terms "inside", "outside", "horizontal", "vertical", "up", "down", "top", "bottom", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0058] In the description of the utility model specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0059] In the description of the utility model specification, unless otherwise clearly specified and limited, the term "connection" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0060] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0061] The existing radar sensor still needs to continuously emit radar detection waves when there is no one in the sensing area, so as to detect the presence of a person in time, which results in high power consumption of the radar sensor. In order to solve the problem of high power consumption of the radar sensor, the utility model provides a sensing device 100, which can sense the movement and micro-movement of a human body in a sensing area 200, please refer to Figure 1-Figure 19 , the sensing device 100 provided by the present utility model will be specifically explained. Figure 1-Figure 7As shown, the sensing device 100 includes a shell 1, a first circuit board 2 and a second circuit board 3; the shell 1 is provided with a sensing cover 4 facing the sensing area 200; the first circuit board 2 is provided on the inner side of the shell 1, and an infrared sensing module 21 is provided on the side of the first circuit board 2 facing the sensing cover 4, and the infrared sensing module 21 has an infrared sensing surface 211, and the infrared sensing surface 211 is used to sense the movement of a human body in the sensing area 200; the second circuit board 3 is provided on the side of the first circuit board 2 facing the sensing cover 4, and a radar sensing module 31 is provided on the second circuit board 3, and the radar sensing module 31 has an emitting surface 311, and the emitting surface 311 is provided toward the sensing cover 4, and the emitting surface 311 can emit radar detection waves, and the radar detection waves are emitted to the outside through the sensing cover 4, and are used to detect micro-movements of a human body in the sensing area 200. Among them, the sensing area 200 can be understood as an area that can be detected by the radar sensing module 31 and can trigger the infrared sensing module 21. Figure 7 The area surrounded by the middle dotted line is a schematic area of ​​the sensing area 200. The sensing area 200 shown in the figure is only used to illustrate the direction of the sensing area, and its range does not represent the range of the actual sensing area. The movement of the human body can be understood as the movement of the human body or the movement of the limbs, such as walking, waving arms, sitting down, etc. The micro-movement can be understood as the tiny movement of the human body in a static state, such as breathing, heartbeat, etc. The infrared sensing surface 211 is a side of the infrared sensing module 21 for sensing infrared light. The infrared sensing module 21 can be understood as a sensor that can generate electrical signal changes in response to changes in infrared light. In one embodiment, the infrared sensing module 21 is set as a pyroelectric infrared sensor. The sensing cover 4 can be understood as a protective cover or other cover body, which is constructed as a thin shell structure and is made of a material with a low dielectric constant to reduce the loss of radar detection waves passing through the sensing cover 4. In one embodiment, the sensing cover 4 is made of PC material with a low dielectric constant.

[0062] The sensing device 100 provided by the embodiment of the utility model realizes dual sensing of human body movement and micro-movement by combining the radar sensing module 31 and the infrared sensing module 21. The pyroelectric material has the physical property of generating charge separation when the temperature changes. The infrared sensing module 21 detects the moving human body, which is a passive detection with very low power consumption. When there is no one in the sensing area 200, the infrared sensing module 21 is relied on for detection, which greatly reduces the power consumption of the sensing device 100, so that the sensing device 100 can be powered by the battery 5, so that the sensing device 100 has mobility, the installation position is not limited by the power cord, and the installation is more convenient. When there is someone in the sensing area 200, the radar sensing module 31 is switched to detect, so that the sensing device 100 can detect the micro-movement of the human body, avoiding the situation where the human body cannot be detected when it is not moving, and perfectly combines the advantages of the radar sensing module 31 and the infrared sensing module 21.

[0063] However, there are technical difficulties in integrating the infrared sensing module 21 and the radar sensing module 31: since the housing of the infrared sensing module 21 is made of metal, the radar detection wave emitted by the radar sensing module 31 is easily interfered by the infrared sensing module 21, resulting in reduced detection performance of the radar sensing module 31. To solve this problem, in some embodiments, such as Figure 6 and Figure 7 As shown, there is a preset distance L3 between the second circuit board 3 and the first circuit board 2, so that the distance L2 between the emitting surface 311 and the first circuit board 2 is greater than the distance L1 between the infrared sensing surface 211 and the first circuit board 2. The embodiment of the utility model controls the preset distance L3 to make the emitting surface 311 higher than the infrared sensing surface 211, so that the radar detection wave emitted by the emitting surface 311 is not easily interfered by the infrared sensing module 21. Figure 6As shown, since the accuracy of the distance between the emitting surface 311 and the infrared sensing surface 211 is jointly affected by the multi-level dimension chain, specifically, the distance between the emitting surface 311 and the infrared sensing module 21 = the preset distance L3 + the thickness of the second circuit board 3 + the distance between the radar sensing module 31 and the second circuit board 3 + the thickness of the radar sensing module 31 - the height of the infrared sensing module 21. It can be seen that the dimension chain of the distance between the emitting surface 311 and the infrared sensing module 21 is very long, which is easy to form error accumulation. Therefore, in the manufacturing process, it is very difficult to accurately control the distance between the emitting surface 311 and the infrared sensing module 21. However, it is relatively simple to accurately control the preset spacing L3. It only needs to design the positioning support structure of the second circuit board 3 to accurately control the preset spacing L3. The embodiment of the utility model sets the preset spacing L3 as an important dimension that needs to be strictly controlled during the design and manufacturing process, thereby indirectly ensuring that the distance between the emitting surface 311 and the infrared sensing surface 211 meets the requirements, greatly reducing the difficulty of design and manufacturing, and ensuring the yield rate of the product.

[0064] Among them, the accuracy of the preset spacing L3 can be controlled by a positioning support structure on the shell 1 or the first circuit board 2, or by other positioning support structures. As long as a positioning structure and / or support structure is provided for controlling the accuracy of the preset spacing L3, it is within the protection scope of the present utility model.

[0065] Furthermore, if Figure 3-Figure 6 As shown, one of the first circuit board 2 and the second circuit board 3 is provided with a pin header 32, and the other is provided with a female header 22, and the pin header 32 is inserted into the female header 22 to realize the electrical connection between the first circuit board 2 and the second circuit board 3; wherein the second circuit board 3 is mounted on the first circuit board 2 by the pin header 32 and the female header 22, and the pin header 32 and the female header 22 support and position the second circuit board 3. Among them, compared with other connection methods, the connection method of the pin header 32 and the female header 22 is adopted between the two circuit boards in this embodiment, which not only realizes the electrical connection between the circuit boards, but also simplifies the connection relationship between the circuit boards, so as to facilitate assembly, maintenance and replacement; at the same time, it also makes the positioning between the first circuit board 2 and the second circuit board 3 more accurate, ensuring the accurate positional relationship between the infrared sensing module 21 and the radar sensing module 31. In addition, the first circuit board 2 supports and positions the second circuit board 3 through the pin header 32 and the female header 22, making the structure more compact, which is conducive to reducing the volume of the sensing device 100 and adapting to the trend of miniaturization.

[0066] In some embodiments, Figure 3-Figure 5As shown, the first circuit board 2 is provided with two pin headers 32 toward the second circuit board 3, and the second circuit board 3 is provided with two pin headers 32, and the two pin headers 32 are respectively inserted into the two female headers 22, and the two female headers 22 support the second circuit board 3 in a balanced manner. Among them, the first circuit board 2 uses two female headers 22 to support the second circuit board 3, which not only improves the structural stability, but also ensures the parallelism between the second circuit board 3 and the first circuit board 2, so that the sensing direction of the radar sensing module 31 is consistent with the sensing direction of the infrared sensing module 21.

[0067] Furthermore, two female connectors 22 are respectively arranged at the diagonal positions of the first circuit board 2, which has the following beneficial effects:

[0068] 1. The parallelism and position accuracy between the second circuit board 3 and the first circuit board 2 are higher, and the sensing direction of the radar sensing module 31 is more accurate; 2. The diagonally arranged female headers 22 are helpful for quick alignment during the assembly process, reduce the position deviation caused by manual operation, and improve the assembly efficiency; 3. Heat is generated during the operation of the circuit board, and the circuit board may produce slight deformation due to thermal expansion and contraction. The diagonally arranged female headers 22 can better balance this deformation and reduce stress concentration on the circuit board.

[0069] Furthermore, if Figure 4-Figure 6As shown, the pin row 32 has a third surface 321 disposed toward the female row 22, and the female row 22 has a fourth surface 221 disposed toward the pin row 32. When the pin row 32 is inserted into the female row 22, the third surface 321 is fitted to the fourth surface 221, so that the preset spacing is controlled by the height of the pin row 32 and the female row 22. In this embodiment, the spacing between the first circuit board 2 and the second circuit board 3 is effectively controlled by fitting the pin row 32 and the female row 22, and the accuracy of the preset spacing L3 can be guaranteed without other positioning structures or supporting structures. It simplifies the assembly process and saves space inside the housing 1, making the structure more compact. It is worth noting that the spacing L4 (not shown in the figure) between the emitting surface 311 and the sensing cover 4 has a great influence on the detection performance of the radar sensing module 31. The spacing L4 between the emitting surface 311 and the sensing cover 4 needs to be adaptively adjusted according to the wavelength change of the radar detection wave, and the relationship between the spacing L4 and the wavelength is described in detail below. The preset spacing L3 of the present embodiment is determined only by the height of the pin header 32 and the female header 22. If the spacing L4 between the emitting surface 311 and the sensing cover 4 needs to be changed, it is only necessary to replace the pin header 32 and the female header 22 of different models, without the need to redesign the structure or change the mold. This allows some parts of the sensing device 100 to be universally applicable to radar sensing modules 31 of different wavelengths, saving material and mold costs. Moreover, during the product development and design stage, the spacing L4 between the emitting surface 311 and the sensing cover 4 can also be changed by replacing the pin headers 32 and the female headers 22 of different heights, thereby testing the detection performance of the radar sensing module 31 at different spacings L4, so as to determine the optimal spacing corresponding to the radar sensing modules 31 of different wavelengths.

[0070] Furthermore, if Figure 8 , Fig.10 and Fig.18 As shown, the induction cover 4 is provided with an abutment portion 41 facing the second circuit board 3, and the abutment portion 41 abuts against a side of the second circuit board 3 away from the pin header 32 and the female header 22, so as to limit the movement of the second circuit board 3 in the direction away from the pin header 32 and the female header 22. The position of the second circuit board 3 in the vertical direction is stably limited between the abutment portion 41 and the pin header 32 or the female header 22, so as to prevent the connection effect between the second circuit board 3 and the first circuit board 2 from being affected due to accidental falling, and the abutment portion 41 can prevent the position or angle of the second circuit board 3 from changing, further improving the reliability and service life of the entire device.

[0071] In some embodiments, Figure 7 , Figure 8 and Figure 17-Figure 19As shown, the sensing cover 4 is provided with a lens member 42, the center of the lens member 42 corresponds to the center of the infrared sensing surface 211, and the lens member 42 is used to converge light on the infrared sensing surface 211. The lens member 42 can be integrally formed with the sensing cover 4, or can be separately formed and then connected to the sensing cover 4. The lens member 42 can be a convex lens array similar to a tortoise shell or a Fresnel lens. The infrared sensing surface 211 is arranged near the focus of the lens member 42. In one embodiment, the infrared sensing surface 211 is arranged within 2 mm below the focus of the lens member 42. The lens component 42 converges infrared light and natural light on the infrared sensing surface 211. The infrared sensing surface 211 is provided with an infrared filter, which only allows infrared light of a specified wavelength to pass through. At least two pyroelectric sensing sheets are provided below the infrared filter. The infrared light irradiates the pyroelectric sensing sheets, causing the irradiated pyroelectric sensing sheets to produce charge separation, while the unirradiated pyroelectric sensing sheets do not produce charge separation, thereby causing the level at the pin of the infrared sensing module 21 to change. The sensing device 100 determines that there is someone in the sensing area 200 according to the level change of the infrared sensing module 21. Among them, the lens component 42 is equivalent to a plurality of convex lenses arranged in an array, each of which can converge light on the infrared sensing surface 211, which not only increases the sensitivity of the infrared sensing module 21 to infrared light, thereby increasing the detection distance, but also improves the detection resolution of the infrared sensing module 21, so that even a small movement of the human body can trigger the infrared sensing module 21.

[0072] In a specific embodiment, the model of the infrared sensing module 21 is PISD324-02, and the focal length of the lens 42 is 6 mm.

[0073] Furthermore, the frequency of the radar detection wave is between 55GHz-80GHz, that is, the wavelength of the radar detection wave in the air is between 3.75mm-5.45mm, which is a millimeter wave with a shorter wavelength. It has a higher resolution and can achieve more accurate detection and identification of target objects.

[0074] like Figure 7 and Figure 2As shown, the sensing cover 4 is provided with a lens mounting hole 43 at a position directly opposite to the infrared sensing module 21, and the lens component 42 is embedded and mounted in the lens mounting hole 43, wherein the lens component 42 is constructed as a hat-shaped structure, the diameter of the lens mounting hole 43 is slightly larger than the lens component 42, and the side of the lens component 42 horizontally extends outwardly from the brim, the diameter of the brim is larger than the lens mounting hole 43, and the lens component 42 is installed into the lens mounting hole 43 from the bottom of the sensing cover 4, and the brim abuts against the lower surface of the lens mounting hole 43, and the brim and the lens mounting hole 43 are sealed by a sealant. The separate molding of the lens component 42 and the sensing cover 4 of this embodiment has the following beneficial effects: 1. It is conducive to ensuring the injection molding accuracy of the lens component 42; 2. The lens component 42 and the sensing cover 4 can be manufactured with different materials, which not only ensures the optical performance of the lens component 42, but also enables the sensing cover 4 to use materials with low dielectric constants; 3. The lens component 42 can use standard parts to reduce manufacturing costs.

[0075] Furthermore, the radar detection wave will be lost and refracted when passing through the sensing cover 4 and the lens member 42, thereby reducing the detection performance of the radar sensing module 31. In order to reduce the loss of the radar detection wave, as shown in FIG. Figure 7 and Figure 3 As shown, the sensor cover 4 is recessed downward around the lens mounting hole 43 so that the lens member 42 sinks into the sensor cover 4, thereby reducing the shielding of the radar detection wave by the lens member 42, thereby expanding the detection range of the radar sensing module 31.

[0076] Furthermore, if Figure 7 As shown, the distance between the emitting surface 311 and the first circuit board 2 is L2, and the distance between the infrared sensing surface 211 and the first circuit board 2 is L1, then L2>2L1; the lens member 42 is arranged at a non-central position of the sensing cover 4, and the infrared sensing module 21 and the radar sensing module 31 are distributed left and right, so that the infrared sensing module 21 and the radar sensing module 31 have a large spacing in both the horizontal and vertical directions, reducing the interference of the infrared sensing module 21 on the radar sensing module 31. Among them, the left and right distribution can be understood as that the projection patterns formed by the pyroelectric sensor and the radar sensing module 31 projected on the first circuit board 2 are distributed on the left and right sides of the first circuit board 2.

[0077] In some embodiments, Figure 3 , Figure 4 and Figure 7As shown, the sensing cover 4 and the lens member 42 are both made of light-transmitting materials; the first circuit board 2 is provided with a light-emitting unit 23 within the coverage of the lens member 42 or the sensing cover 4, and the light emitted by the light-emitting unit 23 is displayed to the outside through the lens member 42 or the sensing cover 4; the second circuit board 3 is provided with a light-sensitive sensing module 33 within the coverage of the sensing cover 4, and the ambient light is irradiated to the light-sensitive sensing module 33 through the sensing cover 4. As a result, the housing 1 does not need to open additional holes or light-transmitting windows to install the light-emitting unit 23 and the light-sensitive sensing module 33, which simplifies the structure and improves the integrity of the sensing device 100. At the same time, there is no need to design an additional waterproof structure, which reduces the manufacturing cost and improves the assembly efficiency. Among them, the first circuit board 2 within the coverage of the lens member 42 can be understood as the projection figure range formed by the projection of the lens member 42 on the first circuit board 2, and the first circuit board 2 within the coverage of the sensing cover 4 can be understood as the projection figure range formed by the projection of the sensing cover 4 on the first circuit board 2. In one embodiment, the light emitting unit 23 is an LED lamp, the light sensitive sensing module 33 is a photoresistor, the sensing cover 4 is made of white PC material, and the lens member 42 is made of white translucent HDPE material.

[0078] In some embodiments, the wavelength of the radar detection wave propagating in the air is λ, and the minimum distance between the induction cover 4 and the emitting surface 311 is greater than λ / 10 to reduce the reflection and interference of the radar detection wave by the induction cover 4; the maximum distance between the induction cover 4 and the emitting surface 311 is less than 3λ / 4 to reduce the reflection and interference of the radar detection wave by the inner wall of the shell 1. In a preferred embodiment, the distance between the induction cover 4 and the emitting surface 311 is set between λ / 4 and λ / 2.

[0079] Further, the frequency of the radar detection wave is between 55GHz-80GHz, and the wavelength of the radar detection wave propagating in the induction cover 4 is λm, wherein the thickness of the induction cover 4 at the corresponding position of the radar sensing module 31 is d, and d satisfies the relationship: λm / 4<d<3λm / 4. Among them, the inventor found through experimental research that when d is close to an integer multiple of λm / 4 or an integer multiple of 3λm / 4, the loss and interference of the radar detection wave are large. Therefore, setting d at λm / 4~3λm / 4 can reduce adverse effects and ensure the stability and accuracy of the radar detection wave. Moreover, this thickness can ensure the penetration efficiency of the radar detection wave and reduce the loss of the radar detection wave. Furthermore, the induction cover 4 in this thickness range can block a part of the external undesirable electromagnetic waves and improve the reliability of the radar sensing module 31. In a preferred implementation, d=λm / 2, so that the loss of the radar detection wave is small. In addition, the frequency of the radar detection wave of this embodiment is between 55GHz-80GHz, that is, the wavelength in the air is between 3.75mm-5.45mm, which belongs to the millimeter wave with a shorter wavelength and has a higher resolution, and can achieve more accurate detection and identification of target objects. In a preferred embodiment, the radar sensing module 31 adopts a radar module of model MRS6130-E1906 of Zhuhai Zhenghe Microchip Technology Co., Ltd., and the frequency of the radar detection wave is 60GHz, and its wavelength in the air is 5mm.

[0080] Thanks to the fact that the sensing device 100 integrates the radar sensing module 31 and the infrared sensing module 21, the power consumption of the sensing device 100 is greatly reduced, so that the sensing device 100 can be powered by the battery 5. In some embodiments, for example Figure 2 and Figure 9-11 As shown, a battery 5 is disposed inside the housing 1, and the sensing device 100 is powered by the battery 5, so that the sensing device 100 is mobile, the installation position is not limited by the power line, and the installation is more convenient. Fig. 9 and Fig.10As shown, the shell 1 is constructed as a cylindrical structure with two ends open. A middle shell 6 is arranged inside the shell 1. The middle shell 6 is arranged below the first circuit board 2. Three limit bones 61 are arranged upward near the side edge of the middle shell 6. The three limit bones 61 are evenly distributed along the circumference of the middle shell 6. The first circuit board 2 is provided with a positioning portion 24 at a corresponding position of each limit bone 61. A limiting groove 11 is arranged on the inner side of the side wall of the shell 1 at a corresponding position of each limit bone 61. The width of the limiting groove 11 is adapted to the limiting bone 61 and the positioning portion 24. The limiting bone 61 abuts against the lower surface of the positioning portion 24 upward, and the positioning portion 24 is pushed into the limiting groove 11. The positioning portion 24 is clamped and fixed between the limiting bone 61 and the limiting groove 11. The positioning portion 24 is formed by dividing the first circuit board 2. Four connecting buckles 62 are evenly distributed along the circumferential direction on the side surface of the middle shell 6, and connecting grooves 16 are provided on the inner side of the side wall of the shell 1 at positions corresponding to the connecting buckles 62. The connecting buckles 62 are snapped into the connecting grooves 16 to achieve fixed connection between the middle shell 6 and the shell 1.

[0081] The battery 5 is a button cell 5, which is arranged below the middle shell 6. The first circuit board 2 is downwardly provided with a positive spring 251 and a negative spring 252. The positive spring 251 passes through the middle shell 6 and abuts against the positive electrode of the battery 5, and the negative spring 252 passes through the middle shell 6 and abuts against the negative electrode of the battery 5. The battery 5 is clamped between the middle shell 6 and the first end cover 71, wherein a foam 75 is pasted on the side of the first end cover 71 facing the battery 5, and the foam 75 abuts against the battery 5 to prevent the battery 5 from shaking up and down, and ensure good contact between the battery 5 and the negative spring 252. A battery compartment is provided on the lower side of the middle shell 6, which is concave upward. The shape of the battery compartment is adapted to the battery 5, and the diameter of the battery compartment is slightly larger than the battery 5. The battery 5 is accommodated in the battery compartment and is limited by the battery compartment. It is worth noting that the battery 5 can be a CR2450 button battery or a CR2477 button battery. The two button batteries only differ in thickness. The foam 75 can be of different thicknesses to adapt to different types of button batteries, thereby preventing the button batteries from shaking.

[0082] like Figure 8-Figure 10As shown, the shell 1 has a first open end and a second open end, the induction cover 4 is sealed and connected to the first open end, the second open end cover is provided with a first end cover 71, and a sealing ring 8 is provided between the first end cover 71 and the shell 1 to form a closed space inside the shell 1, so that the sensing device 100 has waterproof performance and can be used in humid environments. In a specific implementation, an embedded ring 44 is provided around the edge of the induction cover 4 protruding toward the shell 1, and an annular groove 15 is provided around the top of the shell 1. The inner side of the embedded ring 44 is coated with sealant, and the embedded ring 44 is embedded in the annular groove 15. The sealant seals the induction cover 4 and the shell 1. Furthermore, the sealing ring 8 is provided at the junction of the middle shell 6, the shell 1 and the first end cover 71 to achieve a sealed connection between the three. As shown Fig. 9 As shown, an electronic switch 26 is provided at the edge of the first circuit board 2, and a trigger rod of the electronic switch 26 protrudes from the first circuit board 2. A button hole is opened on the side wall of the shell 1 at a position corresponding to the electronic switch 26, and a silicone button 14 is embedded in the button hole. The silicone button 14 is used to trigger the electronic switch 26, wherein the side surface of the silicone button 14 is concave inwardly around one circumference, and the concave is engaged with the button hole so that the silicone button 14 is limited in the button hole, and the silicone button 14 is interference fit with the button hole to achieve a sealed connection between the silicone button 14 and the shell 1.

[0083] Furthermore, the first circuit board 2 is provided with a processing module 27, the processing module 27 is integrated with a wireless communication module, the wireless communication module is used for external wireless communication, and an onboard antenna 271 is provided on the first circuit board 2, and the onboard antenna 271 is electrically connected to the wireless communication module. Furthermore, the processing module 27 and the onboard antenna 271 are both provided on the upper surface of the first circuit board 2.

[0084] In some embodiments, Figure 10-Figure 16 As shown, the sensing device 100 includes an adjustment component 7, which is arranged at one end of the housing 1. The adjustment component 7 includes a first end cap 71 covering the end of the housing 1 and a base 72 pivotally connected to the first end cap 71; the base 72 is provided with a magnetic member 73, and the magnetic member 73 is used for magnetic attraction and connection to the external mounting surface 91, and can be rotated in contact with the external mounting surface 91, so that the first end cap 71 and the housing 1 can adjust the angle in two rotational degrees of freedom relative to the external mounting surface 91, so as to accurately adjust the sensing direction and improve the sensing accuracy and reliability of the sensing device 100. In one embodiment, the two rotational degrees of freedom are already Fig.14The external mounting surface 91 can be understood as the surface of an iron object outside the sensing device 100, such as the surface of a refrigerator, an iron frame, an iron door, etc. In a preferred embodiment, the external mounting surface 91 is set to be the surface of a circular iron sheet 9, and the circular iron sheet 9 can be pasted on the surface of a non-iron object, so that the sensing device 100 can be connected to the non-iron object through the circular iron sheet 9, further improving the installation flexibility and convenience of the sensing device 100. The non-iron object is, for example, glass, a wooden cabinet, a table and chair, a wall, etc. The magnetic member 73 is attached to the external mounting surface 91 for rotation, which can be understood as the magnetic member 73 is kept in an attracted state with the external mounting surface 91 under the action of magnetic attraction, and the friction between the magnetic member 73 and the external mounting surface 91 enables the sensing device 100 to maintain a stationary state when only subjected to gravity. When the user operates the base 72 to rotate, the operating force overcomes the friction force to make the magnetic member 73 rotate relative to the external mounting surface 91, and the magnetic member 73 is kept in an attached state with the external mounting surface 91 during rotation to prevent the sensing device 100 from accidentally falling. The magnetic member 73 can be understood as a magnetic part, such as a magnet, soft magnetic rubber, etc.

[0085] In this embodiment, since the first end cap 71 is covered on the shell 1, the first end cap 71 is at least partially embedded in the shell 1, and the adjustment component 7 overlaps with the shell 1 in thickness, which reduces the thickness of the adjustment component 7, and since there is no rotating shaft in the base 72, the structure of the base 72 is simplified and the thickness is thinner, which further reduces the thickness of the adjustment component 7, so that when the adjustment component 7 is magnetically connected to the external mounting surface 91, the sensing device 100 is as close to the external mounting surface 91 as possible, thereby making the sensing range wider. In addition, thanks to the thinning of the thickness of the adjustment component 7, the demand for installation space is reduced, so that the installation flexibility is increased; it also ensures the concealment and aesthetics of the adjustment component 7 after installation. In addition, the adjustment component 7 is connected to the main body of the sensing device 100 as a whole, and the adjustment component 7 is magnetically installed, so that the sensing device 100 and the adjustment component 7 can easily change the installation position, and the sensing direction can be adjusted after the position is changed, which greatly improves the mobility of the sensing device 100.

[0086] Furthermore, the portion where the first end cover 71 is connected to the base 72 is located at a position corresponding to the edge of the first end cover 71 and at a position corresponding to the edge of the base 72, so that the first end cover 71 can pivot at a larger angle relative to the base 72; in a specific embodiment, Fig.15 and Fig.16As shown, thanks to the pivot shaft 74 being located at the edge of the first end cover 71 and the base 72, when the first end cover 71 pivots at an angle of 90° and 180° relative to the base 72, the housing 1 and the base 72 are not likely to interfere with each other. In addition, setting the pivot shaft 74 at the edge of the first end cover 71 and the base 72 is conducive to making the structure of the first end cover 71 and the base 72 more compact and smaller in size. Moreover, the edge connection facilitates assembly, thereby improving assembly efficiency. Among them, the edge corresponding position can be understood as a position close to the edge or located at the edge.

[0087] Furthermore, if Fig.13 and Fig.14 As shown, the side of the first end cover 71 facing away from the housing 1 is set as a first surface 713, and a connecting portion 711 is set at the edge of the first surface 713, and the connecting portion 711 protrudes from the first surface 713; the base 72 is provided with an embedding opening 722 at a corresponding position of the connecting portion 711, and the connecting portion 711 is embedded in the embedding opening 722. When the first end cover 71 pivots relative to the base 72, the connecting portion 711 rotates in the embedding opening 722; the side wall of the embedding opening 722 is attached to the side wall of the connecting portion 711, and when the sensing device 100 is only under the action of gravity, the angle between the first end cover 71 and the base 72 remains unchanged. Among them, by providing the embedding opening 722 on the base 72 and tightly embedding the connecting portion 711 therein, the connection stability between the first end cover 71 and the base 72 is ensured, and the angle change caused by accidental vibration is reduced. In a preferred embodiment, the width of the embedding opening 722 is slightly smaller than the width of the connecting portion 711, so that the connection between the connecting portion 711 and the embedding opening 722 has a certain interference, so as to increase the friction between the connecting portion 711 and the embedding opening 722, so that the connection between the two is more stable, and at the same time, the reliability of long-term use is also enhanced. In addition, this embodiment adopts a connection method of embedding and matching the connecting portion 711 and the embedding opening 722, so that the first end cover 71 is not easy to interfere with the base 72 during the pivoting movement, thereby increasing the pivoting angle of the first end cover 71, so that the angle adjustable range of the sensing device 100 is larger.

[0088] Furthermore, if Fig.13As shown, the connecting portion 711 is provided with a through hole 712, and the base 72 is provided with a connecting hole 723 at a position corresponding to the through hole 712. The connecting hole 723 is provided from the side of the base 72 to the embedding opening 722, and the left and right sides of the embedding opening 722 are provided with a connecting hole 723 respectively; a connecting screw 724 is provided in the connecting hole 723, and the connecting screw 724 is connected to the through hole 712, and the first end cover 71 is pivotally connected to the base 72 based on the connecting screw 724. Among them, the two connecting holes 723 are respectively connected to the connecting portion 711 through the connecting screws 724, ensuring the stable connection between the first end cover 71 and the base 72, and at the same time, the connecting screw 724 is accommodated in the connecting hole 723, so that the connecting structure is more compact, which is conducive to the miniaturization of the adjustment component 7. In addition, too large a pivot resistance between the first end cover 71 and the base 72 will result in a poor operating feel, while too small a pivot resistance will cause the angle between the first end cover 71 and the base 72 to change under the action of gravity. The present embodiment adopts a screw connection and can adjust the friction between the connecting portion 711 and the embedding opening 722 by adjusting the tightening force of the screw, so as to achieve the purpose of adjusting the pivot resistance between the first end cover 71 and the base 72. The user can obtain a suitable pivot resistance by adjusting the tightening force of the connecting screw 724.

[0089] In some embodiments, Fig.13 and Fig.14 As shown, the magnetic member 73 has a magnetic surface 731, and the magnetic surface 731 is used to be attracted to the external mounting surface 91, wherein the pivot axis 74 of the first end cover 71 pivoting relative to the base 72 is parallel to the magnetic surface 731, so that the rotation axes of the two rotational degrees of freedom are perpendicular to each other, so that the sensing direction of the sensing device 100 can be adjusted within a hemispherical range of a three-dimensional space, so as to accurately adjust the sensing direction of the sensing device 100, so as to improve the sensing reliability. At the same time, the rotation axes of the two rotational degrees of freedom are perpendicular to each other, which can avoid mutual interference between the two rotational degrees of freedom, so as to facilitate independent adjustment of each rotational degree of freedom. Among them, the pivot axis 74 can be understood as the pivot center axis, which is a virtual axis. The pivot axis 74 has been Fig.13 The parallel includes approximately parallel, that is, the angle between the pivot shaft 74 and the magnetic surface 731 can be regarded as parallel within the range of ±10°, which is within the protection scope of the present utility model. In this embodiment, the magnetic surface 731 is the lower surface of the magnetic member 73.

[0090] Furthermore, if Figure 14-16As shown, the magnetic member 73 is embedded and installed in the base 72; the size of the housing 1 is adapted to the size of the first end cover 71, so that when the angle between the first end cover 71 and the base 72 is 60°, the housing 1 does not interfere with the external mounting surface 91. Among them, since the magnetic member 73 is embedded and installed in the base 72, the magnetic member 73 and the base 72 at least partially overlap in thickness, thereby further reducing the thickness of the adjustment component 7. The size of the housing 1 is adapted to the size of the first end cover 71, which can be understood as that the side profile of the housing 1 is smaller than the side profile of the first end cover 71, or the side profile of the housing 1 is equal to the side profile of the first end cover 71, or the side profile of the housing 1 is slightly larger than the side profile of the first end cover 71, so that when the angle between the first end cover 71 and the base 72 is 60°, the outer profile of the housing 1 will not exceed the lower surface of the magnetic member 73, thereby avoiding interference between the housing 1 and the external mounting surface 91. In a preferred embodiment, the side profile of the housing 1 is flush with the side profile of the first end cover 71.

[0091] Furthermore, the lower surface of the base 72 is recessed upward to provide a magnet mounting groove 721, the shape of the magnet mounting groove 721 is adapted to the magnetic component 73, the magnetic component 73 is embedded in the magnet mounting groove 721 from bottom to top, and the upper surface of the magnetic component 73 is adhered to the magnet mounting groove 721; the depth of the magnet mounting groove 721 is slightly smaller than the height of the magnetic component 73, so that the bottom of the magnetic component 73 slightly protrudes from the magnet mounting groove 721, so that the lower surface of the magnetic component 73 can be attached to the external mounting surface 91.

[0092] In some embodiments, Fig.14 As shown, the first end cover 71 is disposed at an end of the housing 1 opposite to the sensing direction, so that the first end cover 71 is perpendicular to the sensing direction, so that the user can control the sensing direction.

[0093] In some embodiments, Figure 1 , Figure 14-16 As shown, the side of the first end cover 71 facing away from the housing 1 is set as a first surface 713, and the side of the base 72 facing away from the magnetic member 73 is set as a second surface 725. The first end cover 71 has at least a first state and a second state during the movement: in the first state (such as Figure 1 ), the first surface 713 of the first end cover 71 is attached to the second surface 725 of the base 72; in the second state (such as Fig.15 ), the first surface 713 of the first end cover 71 is perpendicular to the second surface 725 of the base 72. Further, the first end cover 71 has a third state during the movement: in the third state (such as Fig.16), the first surface 713 is parallel to the second surface 725, and the first surface 713 and the second surface 725 face the same direction. Thus, the sensing direction can be adjusted by 180° in the vertical plane, so that the sensing device 100 can be adapted to various installation environments, and the installation flexibility is greatly improved.

[0094] Since the first end cover 71 is covered at the end of the housing 1, the upper part of the first end cover 71 is embedded in the housing 1, and the lower part is exposed below the housing 1. In order to reduce the overall height of the sensing device 100, the thickness of the first end cover 71 exposed below the housing 1 needs to be as thin as possible. However, this also results in the first end cover 71 having no force application point for easy operation by the user, and it is difficult for the user to remove the first end cover 71. To solve this problem, in some embodiments, such as Fig.14 As shown, the base 72 is used to connect the external mounting surface 91, and the first end cover 71 can be pivoted based on the base 72 to adjust the sensing direction; the housing 1 is provided with a battery 5, and the first end cover 71 is detachably connected to the housing 1, and the first end cover 71 can be adjusted to have a preset angle with the base 72, so that the first end cover 71 can be driven to be disassembled and assembled to the housing 1 by operating the base 72, that is, the base 72 can be used as an operating handle of the first end cover 71, so that the user can more easily apply the operating force to the first end cover 71, so as to remove the first end cover 71 and replace the battery 5; at the same time, since the first end cover 71 is easier to be disassembled, the connection force between the first end cover 71 and the housing 1 can be designed to be larger, and the connection between the two can be more stable, so as to avoid the first end cover 71 from accidentally detaching from the housing 1 when adjusting the angle. Wherein, the detachable connection can be connected by snap-fitting, rotating snap-fitting, plug-in by interference fit, or threaded connection, etc. During actual use, the user can first open the base 72 relative to the first end cover 71 by the preset angle, and then apply an operating force through the base 72 to remove the first end cover 71 from the shell 1; wherein, when the first end cover 71 is connected to the shell 1 by a snap-fit ​​or is inserted into the shell 1 by an interference fit, the operating force can be a pulling force in the direction away from the shell 1, and when the first end cover 71 is rotated and connected to the shell 1 by a rotating snap or is connected to the shell 1 by a thread, the operating force can be a rotational force.

[0095] Furthermore, the preset angle is greater than 45° and less than or equal to 180°, so that the space between the base 72 and the first end cover 71 can accommodate the user's fingers, making it convenient for the user to operate the base 72 .

[0096] In some implementations, such as Fig.14 and Fig.15As shown, the preset angle is greater than 80° and less than or equal to 180°, so that the base 72 and the first end cover 71 can reach a vertical state, which facilitates the user's operating force to be applied to the first end cover 71 through the base 72 .

[0097] In a preferred embodiment, if Fig.16 As shown, the preset angle is 180°, so that the bottom shell is equivalent to an extended handle of the first end cover 71, making it easier for the user to perform the rotation operation.

[0098] In some embodiments, Fig.12 As shown, the base 72 is magnetically connected to the external mounting surface 91 through the magnetic member 73 , so that the base 72 can be quickly disassembled and assembled on the external mounting surface 91 , which is convenient for the user to quickly operate the base 72 to replace the battery 5 .

[0099] In some embodiments, Fig.13 and Fig.14 As shown, the portion where the first end cover 71 is connected to the base 72 is located at a position corresponding to the edge of the first end cover 71 and at a position corresponding to the edge of the base 72. This makes it easier for the user to perform the rotation operation.

[0100] Furthermore, if Fig.13 and Fig.14 As shown, the connecting portion 711 is embedded in the embedding opening 722, and the side wall of the embedding opening 722 is in contact with the side wall of the connecting portion 711. When the first end cover 71 pivots relative to the base 72, the connecting portion 711 rotates in the embedding opening 722. The embedding and matching of the connecting portion 711 and the embedding opening 722 can increase the strength of the connecting portion and prevent damage caused by excessive operating force.

[0101] When the angle between the base 72 and the first end cover 71 is 180°, the bottom shell is equivalent to an extended handle of the first end cover 71, which makes it easier for the user to perform the rotation operation. For this reason, in some embodiments, such as Fig.11 and Fig. 9 As shown, the first end cover 71 is rotatably connected to the housing 1, and the base 72 can drive the first end cover 71 to rotate so that the first end cover 71 can be installed or removed from the housing 1. In this embodiment, the first end cover 71 is rotatably connected to the housing 1, so that the user can more easily remove the first end cover 71, and the clamping force between the first end cover 71 and the housing 1 can be designed to be larger, which ensures easy removal and makes the connection more stable.

[0102] In a specific embodiment, Fig.11 and Fig. 9As shown, the housing 1 has a second open end, the second open end cover is provided with the first end cover 71, the inner wall of the housing 1 is provided with a plurality of snap-in grooves 12 distributed along the circumference, the snap-in grooves 12 extend along the circumference of the housing 1, the end of the snap-in groove 12 is provided with a snap-in entrance 13 toward the second open end, the snap-in entrance 13 communicates with the snap-in groove 12 and the second open end, the side wall of the first end cover 71 is provided with a plurality of snap-in protrusions 715 along the circumference, the snap-in protrusions 715 are rotatably snap-into the snap-in groove 12 through the snap-in entrance 13. There are four snap-in grooves 12, the four snap-in grooves 12 are evenly distributed along the circumference of the housing 1, the side wall of the first end cover 71 is evenly distributed along the circumference, and each snap-in protrusion 715 is snap-into the corresponding snap-in groove 12, respectively.

[0103] Furthermore, if Fig.11 and Fig.10 As shown, abutment wall 714 is extended from one side of the first end cover 71 toward the middle shell 6, and the abutment wall 714 surrounds the first end cover 71 near the side edge, and the clamping protrusion 715 is arranged on the side of the abutment wall 714. A locking bone 63 is extended from the side of the middle shell 6 toward the first end cover 71, and the locking bone 63 is provided with a locking recess, and a locking edge 716 is arranged on the inner side of the abutment wall 714 at a position corresponding to the locking recess, and when the first end cover 71 is rotated and clamped to the housing 1, the locking edge 716 is clamped into the locking recess to prevent the first end cover 71 from accidentally falling off.

[0104] Furthermore, if Fig.10 , Fig.11 and Figure 2 As shown, the first end cover 71 is buckled with the housing 1, and a sealing ring 8 is arranged between the first end cover 71 and the housing 1. When the first end cover 71 is installed on the housing 1, the sealing ring 8 is squeezed to seal the housing 1 and the first end cover 71. The abutting wall 714 of the first end cover 71 presses against the sealing ring 8, which will increase the rotation resistance of the first end cover 71. The greater the squeezing amount of the sealing ring 8, the greater the rotation resistance and the better the waterproof performance. Thanks to the base 72, the rotation of the first end cover 71 can be more labor-saving. This embodiment ensures that the first end cover 71 can be successfully disassembled while meeting the waterproof performance requirements.

[0105] In other embodiments, Figure 17-Figure 19 As shown, this embodiment is Figure 1-Figure 16 The difference between the embodiments is that the lens member 42 is integrally formed with the sensor cover 4 to improve assembly efficiency and improve the sealing between the lens member 42 and the sensor cover 4. Fig.17In the embodiment shown, a plurality of convex lenses are arranged in an array on the back of the lens element 42; Figure 18-Figure 19 In the embodiment shown, the sensing cover 4 is integrally provided with a Fresnel lens pattern 421, and the Fresnel lens pattern 421 forms the lens element 42, wherein the Fresnel lens pattern 421 is arranged at a non-central position of the sensing cover 4, and the position of the infrared sensing module 21 corresponds to the central position of the Fresnel lens pattern 421. The advantage of using the Fresnel lens pattern 421 is that the thickness is very thin, which can further reduce the shielding of the radar sensor by the lens element 42. Further, as Fig.18 As shown, the radar sensing module 31 is arranged in a longitudinal direction, the second circuit board 3 is arranged as close to the left side as possible, and an avoidance arc is provided on the right edge of the second circuit board 3 to prevent the second circuit board 3 from blocking the light converged by the Fresnel lens pattern 421 and to make the area of ​​the Fresnel lens larger.

[0106] In another embodiment (not shown), Figure 18-Figure 19 The difference between the illustrated embodiments is that the Fresnel lens pattern 421 covers the emitting surface 311 and the infrared sensing surface 211, and the frequency of the radar detection wave is between 20GHz and 30GHz. The radar detection wave is emitted externally through the Fresnel lens pattern 421, and the Fresnel lens pattern 421 has a refracting and reflecting effect on the radar detection wave, which will affect the detection performance of the radar sensing module 31. The inventor has found through experimental research that compared with the radar detection wave of 55GHz-80GHz, the influence of the Fresnel lens pattern 421 on the radar detection wave of 20GHz-30GHz will be smaller. For this reason, the frequency of the radar detection wave is set between 20GHz-30GHz in this embodiment, so that the detection performance of the radar sensing module 31 is less affected by the Fresnel lens pattern 421. In a specific embodiment, the radar sensing module 31 adopts the RKB1161L radar module of Sijie Microelectronics, and the frequency of the radar detection wave is 24GHz. Furthermore, in this embodiment, the center of the Fresnel lens pattern 421 corresponds to the center of the sensor cover 4, so that the coverage of the Fresnel lens pattern 421 is larger, and thus the resolution of the infrared sensing module 21 is higher. The infrared sensing module 21 is arranged at a position corresponding to the center of the Fresnel lens pattern 421, the infrared sensing surface 211 is lower than the upper surface of the second circuit board 3, and the second circuit board 3 is provided with a light-transmitting hole at a position corresponding to the infrared sensing module 21, and the light-transmitting hole is used to expose the infrared sensing surface 211, so that the light gathered by the Fresnel lens pattern 421 can irradiate the infrared sensing surface 211.

[0107] It should also be noted that the above-mentioned embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments, that is, the technical solutions disclosed in the later (order of sequence recorded in the text) embodiments should include the technical solutions recorded in the embodiment and the technical solutions recorded in all embodiments before the embodiment.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A sensing device capable of sensing the movement and micro-movement of a human body within a sensing area, characterized in that: include: A shell, wherein the shell is provided with a sensing cover facing the sensing area; A first circuit board is arranged inside the housing, and an infrared sensing module is arranged on a side of the first circuit board facing the sensing cover, and the infrared sensing module has an infrared sensing surface, and the infrared sensing surface is used to sense the movement of a human body in the sensing area; A second circuit board is arranged on a side of the first circuit board facing the sensing cover, a radar sensing module is arranged on the second circuit board, and the radar sensing module has an emitting surface, the emitting surface is arranged toward the sensing cover, the emitting surface can emit radar detection waves, and the radar detection waves pass through the sensing cover and are emitted to the outside to detect slight movements of a human body in the sensing area; a preset distance is provided between the second circuit board and the first circuit board, so that the distance between the emitting surface and the first circuit board is greater than the distance between the infrared sensing surface and the first circuit board.

2. The sensing device according to claim 1, characterized in that: One of the first circuit board and the second circuit board is provided with a pin header, and the other is provided with a female header, and the pin header is inserted into the female header to realize electrical connection between the first circuit board and the second circuit board; The second circuit board is mounted on the first circuit board by the pin header and the mother header, and the pin header and the mother header support and position the second circuit board.

3. The sensing device according to claim 2, characterized in that: The pin row has a third surface arranged toward the female row, and the female row has a fourth surface arranged toward the pin row. When the pin row is inserted into the female row, the third surface is attached to the fourth surface, so that the preset spacing is controlled by the height of the pin row and the female row.

4. The sensing device according to claim 3, characterized in that: The induction cover is provided with an abutment portion toward the second circuit board, and the abutment portion abuts against a side of the second circuit board away from the pin header and the female header to limit the second circuit board from moving in a direction away from the pin header and the female header.

5. The sensing device according to claim 2, characterized in that: The first circuit board is provided with two female headers facing the second circuit board, and the second circuit board is provided with two pin headers. The two pin headers are respectively inserted into the two female headers, and the two female headers support the second circuit board in a balanced manner.

6. The sensing device according to claim 1, characterized in that: The sensing cover is provided with a lens component, the center of the lens component corresponds to the center of the infrared sensing surface, and the lens component is used to converge light on the infrared sensing surface.

7. The sensing device according to claim 6, characterized in that: The frequency of the radar detection wave is between 55 GHz and 80 GHz. The sensing cover is provided with a lens mounting hole at a position directly opposite to the infrared sensing module, and the lens member is embedded and mounted in the lens mounting hole. The induction cover is recessed downwards in the area around the lens mounting hole so that the lens member sinks into the induction cover; The distance between the emitting surface and the first circuit board is L2, and the distance between the infrared sensing surface and the first circuit board is L1, then L2>2L1; The lens component is arranged at a non-central position of the sensing cover, and the infrared sensing module and the radar sensing module are distributed on the left and right.

8. The sensing device according to claim 6, characterized in that: The sensing cover is integrally provided with Fresnel lens patterns, and the Fresnel lens patterns form the lens element; the Fresnel lens patterns cover the emitting surface and the infrared sensing surface, and the frequency of the radar detection wave is between 20 GHz and 30 GHz.

9. The sensing device according to claim 6, characterized in that: The induction cover and the lens element are both made of light-transmitting materials; The first circuit board is provided with a light-emitting unit within the coverage of the lens component and / or the coverage of the induction cover, and the light emitted by the light-emitting unit is displayed to the outside through the lens component and / or the induction cover; The second circuit board is provided with a light-sensitive sensing module within the coverage of the sensing cover, and the ambient light is irradiated to the light-sensitive sensing module through the sensing cover.

10. The sensing device according to any one of claims 1 to 7 and 9, characterized in that: The wavelength of the radar detection wave propagating in the air is λ, the minimum distance between the induction cover and the emitting surface is greater than λ / 10, and the maximum distance is less than 3λ / 4; The frequency of the radar detection wave is between 55 GHz and 80 GHz, and the wavelength of the radar detection wave propagating in the sensing cover is λm, wherein the thickness of the sensing cover at the corresponding position of the radar sensing module is d, and d satisfies the relationship: λm / 4<d<3λm / 4; A battery is disposed inside the housing, and the battery is electrically connected to the first circuit board; The shell is constructed as a cylindrical structure with two ends open, and has a first open end and a second open end. The induction cover is sealed and connected to the first open end. The second open end cover is provided with a first end cover. A sealing ring is provided between the first end cover and the shell to form a closed space inside the shell. An electronic switch is arranged on the edge of the first circuit board, a trigger rod of the electronic switch protrudes from the first circuit board, a button hole is opened on the side wall of the shell at a position corresponding to the electronic switch, a silicone button is embedded in the button hole, and the silicone button is used to trigger the electronic switch, wherein the silicone button is sealed and connected to the shell.

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