Sensor assembly and human presence detection system

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By integrating multiple tilted infrared sensors and illuminance sensors, the detection range is expanded, the cost is reduced, and the problems of limited detection range and poor appearance coordination of traditional sensors are solved, resulting in a compact and aesthetically pleasing sensor assembly.

CN224480197UActive Publication Date: 2026-07-10OPPLE LIGHTING CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: OPPLE LIGHTING CO LTD
Filing Date: 2025-07-14
Publication Date: 2026-07-10

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Abstract

The utility model provides a kind of sensor assembly and human presence detection system.Sensor assembly includes: shell;Sensing component, including infrared lens and the multiple infrared sensors being received in the receiving cavity formed by infrared lens and shell surrounding, multiple infrared sensors are respectively inclinedly arranged in different directions in receiving cavity;Circuit board, is received in receiving cavity, and multiple infrared sensors are integrated on circuit board;And illumination component, is received in receiving cavity, including at least two illumination sensors integrated on circuit board and the illumination lens between infrared lens and circuit board, the side of illumination lens facing infrared lens is equipped with at least two light receiving surfaces towards different directions, at least two light receiving surfaces and at least two illumination sensors one-to-one correspondence.The utility model's sensor assembly is compact in size, and can simultaneously realize large range human movement detection and multi-angle environmental illumination measurement.

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Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a sensor component and a human presence detection system. Background Technology

[0002] In existing technologies, infrared sensors are widely used in smart home applications due to their low cost and low power consumption. However, traditional infrared sensors have a small sensing angle, resulting in a limited detection range. Multiple sensors are typically required to cover a large area, increasing cost and installation complexity.

[0003] Meanwhile, illuminance sensors are typically installed on rooftops or similar locations to calculate the illuminance of the work surface. By adjusting the power of the lighting fixtures, the illuminance on the work surface is kept constant, thus achieving energy savings. However, in scenarios where multiple work surfaces need to be controlled, it is often necessary to install illuminance sensors directly above each work surface. This not only increases equipment costs but also detracts from the aesthetics of the space.

[0004] Furthermore, most existing products that combine human infrared detection and illuminance detection functions are simply two separate modules, resulting in a bulky overall size and poor aesthetic coordination, failing to meet the demands of modern homes for compactness and aesthetics. For example, some products expose the illuminance probe outside the infrared sensor body, affecting both appearance consistency and potential impact on detection accuracy due to external environmental factors.

[0005] In view of this, it is indeed necessary to improve the existing sensor components and human presence detection systems to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a sensor assembly that integrates an infrared sensor and an illuminance sensor, enabling wide-range human movement detection and multi-angle environmental illuminance measurement, while maintaining a compact size and aesthetically pleasing appearance.

[0007] To achieve the above objectives, this utility model provides a sensor assembly, comprising:

[0008] case;

[0009] The sensing component includes an infrared lens and multiple infrared sensors housed in a housing cavity formed by the infrared lens and the housing, wherein the multiple infrared sensors are tilted in different directions within the housing cavity.

[0010] A circuit board, housed within a receiving cavity, on which multiple infrared sensors are integrated; and

[0011] An illuminance assembly, housed in a housing cavity, includes at least two illuminance sensors integrated on a circuit board and an illuminance lens located between an infrared lens and the circuit board. The side of the illuminance lens facing the infrared lens has at least two light-receiving surfaces facing different directions, and the at least two light-receiving surfaces correspond one-to-one with the at least two illuminance sensors.

[0012] Optionally, the infrared sensor is connected and fixed to the circuit board via a fixing structure, which includes:

[0013] The bracket, connected to the circuit board, has a receiving slot for accommodating the infrared sensor;

[0014] The cover is designed to be used with a bracket to hold an infrared sensor.

[0015] Optionally, the fixing structure also includes a locking element that passes through the cover and locks it in place with the bracket.

[0016] Optionally, at least two infrared sensors are provided, and the angle between the central axis of each infrared sensor and the central axis of the sensor assembly ranges from 30° to 50°.

[0017] Optionally, the outer surface of the infrared lens is a smooth spherical surface, and the inner surface is composed of multiple lens units spliced together, with the focal point of each lens unit located at the center of the infrared sensor closest to it.

[0018] Optionally, the inner surface of the infrared lens is provided with a window lens, which is configured to receive ambient light entering the containment cavity and incident on the light receiving surface.

[0019] Optionally, the area and radius of curvature of the window lens are both larger than the area and radius of curvature of any single lens unit.

[0020] Optionally, the illuminance assembly also includes a light-shielding bracket located between the illuminance lens and the circuit board, the light-shielding bracket having a through hole corresponding to the illuminance sensor.

[0021] Optionally, the illuminance lens has at least two convex lenses protruding into the corresponding through hole on the side opposite to the light receiving surface, and the focal length of each convex lens is located on the corresponding illuminance sensor.

[0022] Another objective of this invention is to provide a human presence detection system including the aforementioned sensor components.

[0023] To achieve the above objectives, this utility model provides a human presence detection system, including the aforementioned sensor components and a processor. The processor is electrically connected to the circuit board and is used to receive signals from the infrared sensor and the illuminance sensor to detect the presence of a human body.

[0024] The beneficial effects of this utility model are:

[0025] This invention utilizes multiple tilted infrared sensors combined with a focusing design of infrared lenses to significantly expand the detection range for human movement, covering a larger area. By setting up multiple illuminance sensors with corresponding illuminance lenses, a single illuminance component can measure the illuminance of multiple working surfaces. Simultaneously, integrating the illuminance component within a housing formed by the infrared lens and the casing results in a clean, consistent appearance and compact size for the sensor assembly. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the sensor assembly conforming to an embodiment of the present utility model;

[0027] Figure 2 yes Figure 1 A cross-sectional view of the sensor assembly shown;

[0028] Figure 3 yes Figure 1 An exploded view of the sensor assembly shown.

[0029] Figure 4 yes Figure 3 Schematic diagram of the mid-infrared lens;

[0030] Figure 5 This is a schematic diagram of the assembly of the sensing components and the circuit board;

[0031] Figure 6 yes Figure 2 Exploded view of the medium-illuminance component;

[0032] Figure 7 yes Figure 2 Cross-sectional view of the medium illumination component;

[0033] Figure 8 This is the optical path diagram of the illuminance sensor.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100 - Sensor assembly;

[0036] 200 - Shell, 210 - Receiving cavity;

[0037] 300-Sensing component, 310-Infrared lens, 3101-Outer surface, 3102-Inner surface, 3121-Lens unit, 3122-Window lens, 320-Infrared sensor, 330-Fixing structure, 3301-Bracket, 3311-Receiving slot, 3302-Cover, 3303-Locking component;

[0038] 400 - Circuit Board;

[0039] 500 - Illuminance component, 510 - Illuminance sensor, 520 - Illuminance lens, 5201 - Light receiving surface, 5202 - Convex lens, 530 - Light shielding bracket, 5301 - Through hole. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0042] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] like Figures 1-3 As shown, this utility model provides a sensor assembly 100, which includes a housing 200, a sensing component 300, a circuit board 400, and an illumination component 500. The sensing component 300 includes an infrared lens 310 and multiple infrared sensors 320. The infrared lens 310 and the housing 200 surround and form a receiving cavity 210. The circuit board 400 is housed within the receiving cavity 210, and the multiple infrared sensors 320 and the illumination component 500 are all integrated on the circuit board 400 to realize circuit connection and signal processing.

[0044] like Figure 4 As shown, the outer surface 3101 of the infrared lens 310 is a smooth spherical surface. In this embodiment, the radius of curvature R1 of the outer surface 3101 is 40mm, and the center of the sphere is located at the intersection of the perpendicular lines of the infrared sensor 320. The inner surface 3102 of the infrared lens 310 is composed of multiple lens units 3121 spliced together. The focal point of each lens unit 3121 is located at the center of the infrared sensor 320, which is the closest to it. This effectively focuses the infrared light emitted by the human body onto the infrared sensor 320, triggering a response. In this embodiment, the infrared lens 310 is made of HDPE, whose refractive index n is known, and the thickness at the center of the infrared lens 310 is D. The radius of curvature R2 of each lens unit 3121 and the focal length f of the lens unit 3121 conform to the lens focal length formula:

[0045]

[0046] Infrared light emitted by the human body is refracted by lens unit 3121 and converges at the center of the corresponding infrared sensor 320, thereby enhancing the infrared signal intensity and improving the response sensitivity of infrared sensor 320.

[0047] like Figure 2 As shown, multiple infrared sensors 320 are housed in the housing cavity 210 and are connected and fixed to the circuit board 400 via the fixing structure 330.

[0048] like Figure 5 As shown, the fixing structure 330 includes a bracket 3301, a cover 3302, and a locking member 3303. The bracket 3301 is connected to the circuit board 400 and has a receiving groove 3311 to accommodate the infrared sensor 320. The cover 3302 cooperates with the bracket 3301 and is locked to the bracket 3301 by the locking member 3303 (such as a screw) passing through the cover 3302, thereby clamping and fixing the infrared sensor 320 in the receiving groove 3311. This design ensures the accuracy of the infrared sensor 320's position and effectively reduces the problem of inaccurate infrared sensor 320 accuracy caused by inaccurate soldering position.

[0049] At least two infrared sensors 320 are provided, and the angle between the central axis of each infrared sensor 320 and the central axis of the sensor assembly 100 ranges from 30° to 50°. In this embodiment, four infrared sensors 320 are provided, and the angle between the central axis of each infrared sensor 320 and the central axis of the sensor assembly 100 is 40°. That is, the four infrared sensors 320 are arranged at a 40° angle in four different directions. This multi-angle tilting arrangement expands the detection range of a single sensor assembly 100 from the approximately 90° cone angle of traditional single human infrared sensors to a nearly 360° annular area, realizing multi-angle human movement detection, expanding the detection range, and allowing a single sensor assembly 100 to cover a larger area.

[0050] like Figure 2 As shown, the illuminance assembly 500 is housed in the housing cavity 210 and includes at least two illuminance sensors 510 integrated on the circuit board 400, an illuminance lens 520 located between the infrared lens 310 and the circuit board 400, and a light-shielding bracket 530 located between the illuminance lens 520 and the circuit board 400.

[0051] like Figure 6 As shown, the light-shielding bracket 530 is preferably black and has a through hole 5301 corresponding to the illuminance sensor 510, thereby isolating each illuminance sensor 510 and preventing data interference.

[0052] like Figure 7As shown, the illuminance lens 520 has at least two light-receiving surfaces 5201 facing different directions on the side facing the infrared lens 310. Each of these light-receiving surfaces corresponds to one of at least two illuminance sensors 510, used to receive ambient light and converge it to the corresponding illuminance sensor 510. Preferably, the light-receiving surface 5201 is planar and can polarize the ambient light incident on it, so that ambient light from different directions can converge onto the corresponding illuminance sensors 510, achieving multi-angle positioning and measurement of illuminance.

[0053] At the same time, such as Figure 8 As shown, due to polarization, ambient light rays from different directions will overlap at a certain position above the illuminance lens 520. Therefore, as... Figure 4 As shown, a window lens 3122 is disposed on the inner surface 3102 of the infrared lens 310, and the window lens 3122 coincides with this position, thereby minimizing the impact of illuminance zoning testing. The window lens 3122 can receive ambient light entering the receiving cavity 210 and incident on the light receiving surface 5201 of the illuminance assembly 500. Optionally, the area and radius of curvature of the window lens 3122 are both larger than the area and radius of curvature of any lens unit 3121. The larger area of the window lens 3122 ensures sufficient light flux, while the larger radius of curvature ensures a suitable incident angle of light and reduces refraction loss.

[0054] In this embodiment, the illumination lens 520 is made of transparent plastic material, such as PMMA.

[0055] like Figure 7 As shown, the illuminance lens 520 has at least two convex lenses 5202 protruding into the corresponding through hole 5301 on one side away from the light receiving surface 5201. Preferably, the focal length of each convex lens 5202 is located on the corresponding illuminance sensor 510, thereby converging external light and enhancing the response of the illuminance sensor 510.

[0056] In this embodiment, three illuminance sensors 510 are provided, corresponding to three different detection directions, and correspondingly, three light-receiving surfaces 5201 are also provided. Of course, in other scenarios where the requirements for illuminance detection directions are less, the number of illuminance sensors 510 can be reduced to two. For example, in a corridor scenario, only the illuminance at both ends of the corridor needs to be detected. In this case, the illuminance lens 520 is provided with two light-receiving surfaces 5201 and two convex lenses 5202, corresponding to the entrance and exit directions of the corridor, respectively.

[0057] The working process of the sensor assembly 100 in this embodiment is as follows: When a human body moves within the detection range of the sensor assembly 100, the infrared light emitted by the human body is focused onto the corresponding infrared sensor 320 by the lens unit 3121 of the infrared lens 310. The infrared sensor 320 generates an electrical signal, which is processed by the circuit board 400 to determine the human body's movement status. At the same time, ambient light enters the receiving cavity 210 through the window lens 3122 of the infrared lens 310 and is incident on the light receiving surface 5201 of the illuminance lens 520. The light receiving surface 5201 polarizes the light. Finally, the light is focused onto the corresponding illuminance sensor 510 by the convex lens 5202 of the illuminance lens 520. The illuminance sensor 510 converts the light signal into an electrical signal, which is processed by the circuit board 400 to obtain the illuminance data for each area.

[0058] This utility model also provides a human presence detection system, including a sensor assembly 100 and a processor (not shown). The processor is electrically connected to a circuit board 400. An infrared sensor 320 transmits the detected infrared signal to the processor, and an illuminance sensor 510 transmits the detected ambient light illuminance signal to the processor. The processor receives and analyzes the infrared signal and the ambient light illuminance signal to determine whether a human body exists in the detection area and outputs the corresponding detection result signal.

[0059] In summary, this invention utilizes multiple tilted infrared sensors 320 in conjunction with the focusing design of the infrared lens 310 to significantly expand the detection range for human movement, covering a larger area. By setting multiple illuminance sensors 510 in conjunction with corresponding illuminance lenses 520, a single illuminance component 500 can measure the illuminance of multiple working surfaces, eliminating the need to install a separate illuminance sensor 510 on each working surface, thus reducing costs and maintaining a clean aesthetic. Simultaneously, by integrating the illuminance component 500 into the receiving cavity 210 formed by the infrared lens 310 and the housing 200, and concealing the illuminance probe externally through the window lens 3122, the sensor component 100 achieves a clean, consistent appearance and compact size.

[0060] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A sensor assembly, characterized in that, include: Casing (200); The sensing component (300) includes an infrared lens (310) and a plurality of infrared sensors (320) housed in a housing cavity (210) formed by the infrared lens (310) and the housing (200), wherein the plurality of infrared sensors (320) are respectively tilted in different directions in the housing cavity (210); A circuit board (400) is housed in the receiving cavity (210), and a plurality of the infrared sensors (320) are integrated on the circuit board (400); and An illuminance assembly (500) is housed in the receiving cavity (210) and includes at least two illuminance sensors (510) integrated on the circuit board (400) and an illuminance lens (520) located between the infrared lens (310) and the circuit board (400). The side of the illuminance lens (520) facing the infrared lens (310) is provided with at least two light receiving surfaces (5201) facing different directions, and the at least two light receiving surfaces (5201) correspond one-to-one with the at least two illuminance sensors (510).

2. The sensor assembly according to claim 1, characterized in that, The infrared sensor (320) is connected and fixed to the circuit board (400) via a fixing structure (330), the fixing structure (330) comprising: A bracket (3301), connected to the circuit board (400), is provided with a receiving slot (3311) for accommodating the infrared sensor (320); The cover (3302) is adapted to cooperate with the bracket (3301) to clamp the infrared sensor (320).

3. The sensor assembly according to claim 2, characterized in that, The fixing structure (330) further includes a locking member (3303), which passes through the cover (3302) and is locked and fixed to the bracket (3301).

4. The sensor assembly according to claim 1, characterized in that, At least two infrared sensors (320) are provided, and the angle between the central axis of each infrared sensor (320) and the central axis of the sensor assembly is in the range of 30° to 50°.

5. The sensor assembly according to claim 1, characterized in that, The outer surface (3101) of the infrared lens (310) is a smooth sphere, and the inner surface (3102) is composed of multiple lens units (3121) spliced together. The focal point of each lens unit (3121) is located at the center of the infrared sensor (320) that is closest to it.

6. The sensor assembly according to claim 5, characterized in that, The inner surface (3102) of the infrared lens (310) is provided with a window lens (3122), which is configured to receive ambient light entering the receiving cavity (210) and incident on the light receiving surface (5201).

7. The sensor assembly according to claim 6, characterized in that, The area and radius of curvature of the window lens (3122) are both greater than the area and radius of curvature of any one of the lens units (3121).

8. The sensor assembly according to claim 1, characterized in that, The illuminance assembly (500) further includes a light-shielding bracket (530) located between the illuminance lens (520) and the circuit board (400), and the light-shielding bracket (530) has a through hole (5301) corresponding to the illuminance sensor (510).

9. The sensor assembly according to claim 8, characterized in that, The illuminance lens (520) has at least two convex lenses (5202) protruding into the corresponding through hole (5301) on the side opposite to the light receiving surface (5201), and the focal length of each convex lens (5202) is located on the corresponding illuminance sensor (510).

10. A human presence detection system, characterized in that, Includes a sensor assembly and a processor as described in any one of claims 1 to 9, wherein the processor is electrically connected to the circuit board (400) for receiving signals from the infrared sensor (320) and the illuminance sensor (510) to detect the presence of a human body.