Detection module applied to smart home equipment

Abstract

The utility model provides a detection module applied to smart home equipment, the detection module comprises a transmitting module and a receiving module, and the transmitting module comprises a light source; a first super lens; the first module shell is used for fixing the light source and the first super lens; the first super lens is arranged on the light emitting side of the light source; the first super lens is used for collimating a light beam emitted by the light source and outputting the light beam in a transmission manner, so that the light beam output by the first super lens is projected on a detection object to obtain a light spot dot matrix, and the light beam output by the first super lens avoids a target wall body; the extending direction of the target wall body is parallel to the optical axis of the light beam output by the first super lens. The emission module in the detection module provided by the utility model can effectively prevent the light beam output by the emission module from being blocked by the wall body in the propagation process as much as possible, so that the detection accuracy of the detection module is effectively improved.

Description

Technical Field

[0001] This application relates to the field of optics, and particularly to a detection module applied to smart home devices. Background Art

[0002] In the field of smart home, many smart home devices have detection requirements. The detection requirements include but are not limited to: the requirement of measuring the distance of an object; the requirement of sensing the shape of an object; the requirement of sensing the posture of an object. Taking the requirement of measuring the distance of an object as an example, at the current stage, to meet this requirement, in related technologies, a detection module applying TOF (Time Of Flight) technology is usually set. The emission module of the detection module emits a light beam, projects a light spot array on the detection object, and then senses the light spot array. Finally, based on the time taken for the light spot array to be projected and sensed, the distance to the detection object is measured.

[0003] However, for the detection module applied to smart home devices provided by related technologies, the light beam output by its emission module is often blocked by some walls during the propagation process, resulting in inaccurate detection. Summary of the Utility Model

[0004] An object of this application is to propose a detection module applied to smart home devices. The emission module in the detection module provided by this application can effectively avoid the light beam output by it being blocked by walls during the propagation process, thereby effectively improving the detection accuracy of the detection module.

[0005] According to one aspect of the embodiments of this application, a detection module applied to smart home devices is disclosed. The detection module includes an emission module and a reception module. The emission module includes: a light source; a first superlens; a first module housing for fixing the light source and the first superlens;

[0006] The first superlens is disposed on the light-emitting side of the light source; the first superlens is used to collimate the light beam emitted by the light source and output it in a transmissive manner, so that the light beam output by the first superlens projects a light spot array on the detection object and the light beam output by the first superlens avoids the target wall; the extending direction of the target wall is parallel to the optical axis of the light beam output by the first superlens.

[0007] In an exemplary embodiment of this application, the height of the light-emitting surface of the first superlens is between the height of the light-incident surface of the first superlens and the height of the outer surface of the first module housing;

[0008] The target wall includes the wall formed by the height difference between the light-emitting surface of the first superlens and the outer surface of the first module housing.

[0009] In an exemplary embodiment of the present application, the target wall includes: the wall of the container where the detection object is located.

[0010] In an exemplary embodiment of the present application, the detection module is disposed at the first end of the target wall; the detection module is configured to detect the detection object from the position where the first end is located when the detection object enters the space surrounded by the target wall from the second end of the target wall.

[0011] In an exemplary embodiment of the present application, part of the light beams emitted by the light source are also reflected by the first superlens to form the light beams emitted by the first superlens;

[0012] The emission module further includes: a first image sensor; the first image sensor is disposed on the light incident side of the first superlens; the first image sensor is configured to receive and sense the light beams reflected by the first superlens.

[0013] In an exemplary embodiment of the present application, a filter film is provided on the first superlens, and the filter film is configured to block light beams outside the working band from reaching the first image sensor from outside the emission module.

[0014] In an exemplary embodiment of the present application, the receiving module includes: a second image sensor for sensing the light spot array; a second module housing for fixing the second image sensor.

[0015] In an exemplary embodiment of the present application, the receiving module further includes: a focusing lens; the focusing lens is configured to converge the light beams received from outside the receiving module and output the converged light beams to the second image sensor.

[0016] In an exemplary embodiment of the present application, the focusing lens is a second superlens.

[0017] In an exemplary embodiment of the present application, the first module housing and the second module housing together form an integrated module housing.

[0018] In an exemplary embodiment of the present application, part of the light beams emitted by the light source are also reflected by the first superlens to form the light beams emitted by the first superlens; the emission module further includes: a first image sensor; the first image sensor is disposed on the light incident side of the first superlens; the first image sensor is configured to receive and sense the light beams reflected by the first superlens;

[0019] The integrated module housing includes a baffle structure for isolating the light-receiving area of the first image sensor from the internal space of the receiving module and for isolating the light-receiving area of the second image sensor from the internal space of the transmitting module.

[0020] The detection module provided in this application includes a transmitting module and a receiving module. The transmitting module includes: a light source; a first superlens; and a first module housing for fixing the light source and the first superlens. The first superlens is disposed on the light-emitting side of the light source; the first superlens is configured to collimate the light beam emitted by the light source and output it in a transmissive manner, so that the light beam output by the first superlens projects a light spot array on the detection object and the light beam output by the first superlens avoids the target wall; the extending direction of the target wall is parallel to the optical axis of the light beam output by the first superlens. Since the light beam output by the first superlens is collimated, the divergence angle of the light beam output by the first superlens is reduced. Thus, even when the light beam output by the first superlens is kept at a relatively close distance from the target wall, it can effectively avoid the target wall and prevent being blocked by the target wall during propagation, thereby effectively improving the detection accuracy of the detection module.

[0021] Other features and advantages of the present application will become apparent from the following detailed description, or will be learned in part through the practice of the present application.

[0022] It should be understood that the above general description and the following detailed description are exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By referring to the drawings and describing its exemplary embodiments in detail, the above and other objects, features, and advantages of the present application will become more apparent.

[0024] Figure 1 FIG. shows a schematic structural diagram of the transmitting module in the detection module provided in an embodiment of the present application.

[0025] Figure 2 FIG. shows a schematic structural diagram of the transmitting module in the detection module provided in an embodiment of the present application.

[0026] Figure 3 FIG. shows a schematic diagram of the first superlens in the transmitting module provided in an embodiment of the present application collimating the light beam emitted by the light source.

[0027] Figure 4 FIG. shows Figure 3 a schematic diagram of the light spot array projected by the light beam output by the shown first superlens.

[0028] Figure 5Shows a schematic diagram of the light beam emitted by the light source in an embodiment of the present application being reflected by the first metalens.

[0029] Figure 6 Shows a schematic structural diagram of the emission module in the detection module provided in an embodiment of the present application.

[0030] Figure 7 Shows a schematic structural diagram of the receiving module in the detection module provided in an embodiment of the present application.

[0031] Figure 8 Shows a schematic structural diagram of the receiving module in the detection module provided in an embodiment of the present application.

[0032] Figure 9 Shows a schematic structural diagram of the receiving module in the detection module provided in an embodiment of the present application.

[0033] Figure 10 Shows a schematic structural diagram of the detection module provided in an embodiment of the present application.

[0034] Figure 11 Shows a schematic structural diagram of the detection module provided in an embodiment of the present application.

[0035] Reference numerals:

[0036] 1 - Light source; 2 - First metalens; 3 - First module housing; 4 - First image sensor; 5 - Filter film; 6 - Second image sensor; 7 - Second module housing; 8 - Focusing lens; 9 - Baffle structure. Detailed implementation manners

[0037] Now, example embodiments will be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this application will be more thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are only schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted.

[0038] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more example embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the example embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, steps, etc. can be adopted. In other cases, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring the various aspects of the present application.

[0039] The related art does not realize that in many application scenarios in the field of smart home, the light beam output by the transmitting module of the detection module will be blocked by some walls during the propagation process. And the light beam blocked by the wall cannot all reach the detection object, resulting in the inability to project a light spot matrix on the detection object as expected, and further resulting in the detection module being unable to accurately detect.

[0040] Therefore, for the detection module applied to smart home devices provided by the related art, the light beam output by its transmitting module is often blocked by some walls during the propagation process, resulting in the inability to accurately detect.

[0041] In consideration of overcoming the above-mentioned defects existing in the related art, the present application provides a detection module applied to smart home devices. The transmitting module in the detection module provided by the present application can effectively avoid the light beam output by it being blocked by the wall during the propagation process, thereby effectively improving the detection accuracy of the detection module.

[0042] Figure 1 The structure diagram of the transmitting module in the detection module provided by an embodiment of the present application is shown. Figure 2 The structure diagram of the transmitting module in the detection module provided by another embodiment of the present application is shown.

[0043] See Figure 1 and Figure 2 As shown in FIGS. and, the transmitting module in the detection module provided by the present application includes: a light source 1; a first superlens 2; and a first module housing 3 for fixing the light source 1 and the first superlens 2. Among them, the light source 1 can be fixed at the bottom inside the first module housing 3; in this case, a power supply element can also be provided at the bottom inside the first module housing 3 to supply electrical energy to the light source 1.

[0044] The first superlens 2 is provided on the light-emitting side of the light source 1. Then, the light beam emitted by the light source 1 will propagate towards the first superlens 2. The first superlens 2 is a transmissive optical element. After receiving the light beam emitted by the light source 1, it collimates the light beam emitted by the light source 1 and outputs it in a transmissive manner. After the light beam output by the first superlens 2 propagates a certain distance, a light spot matrix can be projected on the detection object. Cooperating with the receiving module in the detection module, the projected light spot matrix can be used to measure the distance of the detection object, can also be used to sense the shape of the detection object, and can also be used to sense the posture of the detection object.

[0045] In many application scenarios in the field of smart home, the light beam output by the emission module will inevitably be at a relatively close distance from certain wall bodies. In many cases, the extension direction of these wall bodies is parallel to the optical axis of the light beam output by the emission module, and this situation will cause the light beam output by the emission module to be blocked by these wall bodies during propagation. For example: A detection module can be set near the water outlet of a water dispenser. When a cup is placed below the water outlet, the light beam emitted by the emission module in the detection module is projected onto the liquid surface in the cup; in this way, the light beam emitted by the emission module can measure the distance to the liquid surface in the cup, and then, combined with the position of the cup mouth, the water outlet can be automatically stopped intelligently. Since the light beam emitted by the emission module needs to be projected onto the liquid surface in the cup, the light beam emitted by the emission module needs to propagate vertically towards the bottom of the cup. The extension direction of the cup wall is usually perpendicular to the bottom of the cup, or approximately perpendicular to the bottom of the cup. Therefore, the optical axis of the light beam emitted by the emission module is parallel to the extension direction of the cup wall. It can be understood that in this case, if the divergence angle of the light beam emitted by the emission module is large, then as the propagation distance increases, the diameter of the light beam emitted by the emission module will increase relatively quickly, which may cause the edge position of the light beam emitted by the emission module to touch the cup wall before reaching the liquid surface in the cup and be blocked by the cup wall.

[0046] In this application, the wall body that inevitably needs to maintain a relatively close distance and whose extension direction is parallel to the optical axis of the light beam emitted by the emission module is called the target wall body. Since the light beam output by the first superlens 2 is collimated, the divergence angle of the light beam output by the first superlens 2 is reduced. Therefore, even if the light beam output by the first superlens 2 is at a relatively close distance from the target wall body, it can effectively avoid the target wall body and prevent being blocked by the target wall body during propagation, thereby effectively improving the detection accuracy of the detection module.

[0047] Moreover, in the emission module of the detection module provided in this application, a single superlens is used to collimate and output the light beam emitted by the light source. Compared with the traditional refractive lens, the superlens has the advantages of thin thickness, light weight, and low cost. Therefore, while the detection module provided in this application can effectively improve the detection accuracy of the detection module, it can also reduce the volume, mass, and cost of the detection module.

[0048] It should be noted that in this application, the extension direction of the target wall is parallel to the optical axis of the light beam output by the first metalens 2, which means that when the extension starting point and the extension ending point of the target wall are the main objects of concern, the extension direction of the target wall is parallel or approximately parallel to the optical axis of the light beam output by the first metalens 2. For example, in the detection module provided in a water dispenser, the light beam emitted by the first metalens 2 of the emission module propagates vertically downward. The utensils actually used by users to receive water may be straight cups, wide-mouthed bowls, or other utensils with strange shapes. However, no matter which utensil it is, when the utensil mouth and the utensil bottom are the main objects of concern, the extension direction of the wall of these utensils can be regarded as vertical or approximately vertical. Therefore, the extension direction of the wall of these utensils can be regarded as parallel to the optical axis of the light beam output by the first metalens 2.

[0049] Figure 3 FIG. 4 shows a schematic diagram of collimating the light beam emitted by the light source 1 by the first metalens 2 of the emission module in the detection module provided in an embodiment of the present application. Figure 4 Then FIG. Figure 3 shows a schematic diagram of the light spot array obtained by projecting the light beam output by the first metalens 2 shown in FIG.

[0050] See Figures 3 to 4 , in an embodiment, the light beam emitted by the light source 1 has a certain divergence angle, and then is received, collimated and output by the first metalens 2. Compared with the divergence angle of the light beam emitted by the light source 1 before collimation, the divergence angle of the light beam output by the first metalens 2 is significantly reduced. In this embodiment, the full-angle divergence angle of the light beam output by the first metalens 2 is less than 8°. And if an observation screen parallel to the second metalens 2 is set at a certain distance position on the light-emitting side of the second metalens 2, then a light spot array as shown in FIG. Figure 4 can be projected on this observation screen.

[0051] See Figure 1 , in an embodiment, the height of the light-incident surface of the first metalens 2 is between the height of the light source 1 and the height of the outer surface of the first module housing 3.

[0052] In this embodiment, by adopting this design, the first metalens 2 can be embedded in the first module housing 3 to a certain extent, so that the possibility of collision between the first metalens 2 and external objects can be effectively reduced, and thus the safety of the first metalens 2 can be improved. And by adopting this design, the general requirements for miniaturization and flattening of equipment nowadays can be effectively met.

[0053] In an embodiment, when the height of the light-incident surface of the first metalens 2 is between the height of the light source 1 and the height of the outer surface of the first module housing 3, the light-emitting surface of the first metalens 2 is flush with the outer surface of the first module housing 3.

[0054] See Figure 1 , in one embodiment, the height of the light-emitting surface of the first metalens 2 is between the height of the light-incident surface of the first metalens 2 and the height of the outer surface of the first module housing 3. In this case, there is a certain height difference between the light-emitting surface of the first metalens 2 and the outer surface of the first module housing 3, thus forming a wall body with a certain height.

[0055] In this embodiment, the target wall body includes the wall body formed by the height difference between the light-emitting surface of the first metalens 2 and the outer surface of the first module housing 3. That is, in this embodiment, the light beam output by the first metalens 2 needs to avoid the wall body formed by the height difference between the light-emitting surface of the first metalens 2 and the outer surface of the first module housing 3.

[0056] It should be noted that depending on the application scenario, the target wall body including the wall body formed by the height difference between the light-emitting surface of the first metalens 2 and the outer surface of the first module housing 3 may also include other wall bodies; that is, in the same scenario, the target wall body to be avoided by the light beam output by the first metalens 2 can come from different objects. For example: a detection module is arranged near the water outlet of a water dispenser, wherein the first metalens 2 of the emission module is embedded in the first module housing 3, and the height of the light-emitting surface of the first metalens 2 is between the height of the light-incident surface of the first metalens 2 and the height of the outer surface of the first module housing 3. In this case, the target wall body includes two parts - the first part of the target wall body is the wall body formed by the height difference between the light-emitting surface of the first metalens 2 and the outer surface of the first module housing 3, and the second part of the target wall body is the wall of the cup to receive water. The first part of the target wall body comes from the detection module, and the second part of the target wall body comes from the cup; through collimation, the light beam output by the first metalens 2 can avoid these two parts of the target wall body.

[0057] It should also be noted that the design provided in this embodiment for the case where "the target wall body includes the wall body formed by the height difference between the light-emitting surface of the first metalens 2 and the outer surface of the first module housing 3" is applicable to any kind of smart home device, including but not limited to: water dispenser, automatic feeder, hair curler, juicer, TV set, electric fan, air conditioner, washing machine.

[0058] See Figure 2 , in one embodiment, the light-incident surface of the first metalens 2 is flush with the outer surface of the first module housing 3. In this case, the first metalens 2 entirely protrudes from the first module housing 3. By adopting this method, the processing difficulty of the first module housing 3 can be reduced.

[0059] In one embodiment, the target wall includes: the wall of the container where the detection object is located. That is, in this embodiment, the detection object is placed in the container. In this case, the detection object can be a liquid level or a solid surface; and the container for accommodating the detection object includes but is not limited to: cups, bowls, kettles, buckets. Through collimation, the light beam output by the first metalens 2 can avoid the wall of the container where the detection object is located, so that the detection module can accurately detect the detection object in the container.

[0060] It should be noted that for the design provided in this embodiment for the case where "the target wall includes the wall of the container where the detection object is located", the applicable smart home devices include but are not limited to: water dispensers, automatic feeders (which can feed both solids and liquids).

[0061] In one embodiment, the detection module is provided at the first end of the target wall, and during the use of the smart home device, the detection object enters the space enclosed by the target wall from the second end of the target wall. Then, the emission module in the detection module provided at the first end can project the light beam output by the first metalens 2 onto the detection object, so that the detection module can complete the detection of the detection object.

[0062] In this embodiment, the target wall can be a cylindrical wall. The cylindrical wall encloses a columnar space. Then, the detection object can enter the columnar space from the second end of the cylindrical wall.

[0063] In this embodiment, the target wall can also be a set of cylindrical walls composed of two concentric cylindrical walls. The set of cylindrical walls jointly encloses an annular space. Then, the detection object can enter the annular space from the second end of the set of cylindrical walls.

[0064] In this embodiment, the target wall can also be a set of sheet walls composed of multiple (greater than or equal to two) independent sheet walls. In this case, the first ends of the set of sheet walls can be commonly fixed on a connecting device, and the connecting device combined with the set of sheet walls can form a clamp. When the clamp is in an open state, the second ends of the set of sheet walls are separated from each other. Then, the set of sheet walls jointly encloses a semi-open space. Then, the detection object can enter the semi-open space from the second end of the set of sheet walls.

[0065] It should be noted that for the design provided in this embodiment for the case where "the detection module is provided at the first end of the target wall and the detection object enters the space enclosed by the target wall from the second end of the target wall", the applicable smart home devices include but are not limited to: hair curlers, juicers.

[0066] It should be noted that although the first metalens 2 in the emission module provided in this application is a transmissive type, it does not mean that all the light beams emitted by the light source 1 will transmit through the first metalens 2.

[0067] Figure 5 The figure shows a schematic diagram of the light beam emitted by the light source 1 being reflected by the first metalens 2 in an embodiment of this application. Refer to Figure 5 , part of the light beam emitted by the light source 1 will be reflected by the first metalens 2, thus forming the light beam reflected by the first metalens 2.

[0068] It can be understood that there will be errors in the processing of the first module housing 3, and there will also be errors in the assembly of the light source 1. Therefore, even with the same design, in different emission modules, the relative positions of the light source 1 in the first module housing 3 will actually be somewhat different; and the relative position of the light source 1 in the first module housing 3 can be used by the detection module to determine the distance of the detection object. Therefore, by detecting the light beam reflected by the first metalens 2, it can be used to determine the relative position of the light source 1 in the first module housing 3, and thus the ranging accuracy of the detection module can be improved.

[0069] Or, by detecting the intensity of the light beam reflected by the first metalens 2, it can also be used to evaluate the actual intensity of the light beam emitted by the light source 1, and thus the working power of the light source 1 can be adjusted in real time to control the actual intensity of the light beam emitted by the light source 1 to meet the application requirements.

[0070] Therefore, refer to Figure 5 , in an embodiment, the emission module further includes a first image sensor 4. The first image sensor 4 is disposed on the incident light side of the first metalens 2, that is, relative to the first metalens 2, the first image sensor 4 and the light source 1 are disposed on the same side. Therefore, the first image sensor 4 can receive the light beam reflected by the first metalens 2 and sense the light beam emitted by the first metalens 2, so as to improve the ranging accuracy of the detection module or to adjust the working power of the light source 1 in real time.

[0071] Figure 6 The figure shows a schematic structural diagram of the emission module in the detection module provided in an embodiment of this application. Refer to Figure 6 , in an embodiment, when the first image sensor 4 is provided in the emission module, a filter film 5 is provided on the first metalens 2. The filter film 5 can be disposed on the light-emitting surface of the first metalens 2 or on the incident light surface of the first metalens 2.

[0072] The filter film 5 is used to block the light beam outside the working band from reaching the first image sensor 4 from the outside of the emission module, thereby avoiding interference of the external light beam of the emission module on the first image sensor 4, and thus ensuring the accuracy of the first image sensor 4 sensing the light beam reflected by the first metalens 2.

[0073] The first metalens 2 in the emission module provided by this application includes a first substrate and a first micro-nano structure, and the first micro-nano structure is a sub-wavelength structure. The first micro-nano structure can be disposed on the surface of the first substrate facing the light source 1 or on the surface of the first substrate facing away from the light source 1.

[0074] When the first micro-nano structure is disposed on the surface of the first substrate facing the light source 1, the first micro-nano structure will not be directly exposed to the external environment of the emission module, thereby improving the safety of the first micro-nano structure.

[0075] When the first micro-nano structure is disposed on the surface of the first substrate facing away from the light source 1, the light beam emitted by the light source 1 will be refracted on the first substrate before entering the first micro-nano structure; in this way, the optical path of the light beam emitted by the light source 1 can be compressed, which is beneficial to compressing the distance between the first metalens 2 and the light source 1.

[0076] When the first micro-nano structure is a positive micro-nano structure, a material that is transparent in the working band other than air can be filled between the first micro-nano structures, thereby ensuring the safety of the first micro-nano structure.

[0077] The material filled between the negative micro-nano structures usually remains the same as the material of the substrate. When the first micro-nano structure is a negative micro-nano structure, the first micro-nano structure will naturally be coated with other materials other than air, thereby ensuring the safety of the first micro-nano structure.

[0078] Figure 7 The structural schematic diagram of the receiving module in the detection module provided by an embodiment of this application is shown. Refer to Figure 7 In one embodiment, the receiving module includes: a second image sensor 6 for sensing the light spot array; a second module housing 7 for the second image sensor 6.

[0079] Specifically, a light passing small hole can be opened on the second module housing 7, and the light passing small hole is disposed above the second image sensor 6; thus, the second image sensor 6 can receive the light beam outside the receiving module in the way of pinhole imaging, so as to sense the light spot array projected by the emission module on the detection object. Then, the detection module can determine the distance, shape or posture of the detection object based on the light spot array sensed by the second image sensor 6.

[0080] Figure 8 The structural schematic diagram of the receiving module in the detection module provided by an embodiment of this application is shown. Refer to Figure 8 In one embodiment, the receiving module further includes: a focusing lens 8. The focusing lens 8 is used to receive the light beam from the outside of the receiving module, then converge the received light beam, and output the converged light beam to the second image sensor 6.

[0081] When the light beam output by the first metalens 2 in the emission module projects a light spot array on the detection object, the light beam reflected by the light spot array can be received, converged, and output by the focusing lens 8. Then, the second image sensor 6 can sense the light spot array. Thus, the detection module can determine the distance, shape, or posture of the detection object based on the light spot array sensed by the second image sensor 6.

[0082] In one embodiment, the focusing lens 8 is fixed to the second module housing 7.

[0083] In one embodiment, the focusing lens 8 is fixed to the second image sensor 6.

[0084] In one embodiment, the focusing lens 8 is a conventional refractive lens.

[0085] Figure 9 The structural schematic diagram of the receiving module in the detection module provided by an embodiment of the present application is shown. Refer to Figure 9 In one embodiment, the focusing lens 8 is a metalens; thus, in this embodiment, the focusing lens 8 is denoted as the second metalens 8.

[0086] The second metalens 8 in the receiving module in the embodiment of the present application includes a second substrate and a second micro-nano structure, and the second micro-nano structure is a sub-wavelength structure. The second micro-nano structure can be disposed on the surface of the second substrate facing the second image sensor 6, or can be disposed on the surface of the second substrate facing away from the second image sensor 6. At the same time, the second micro-nano structure can be a positive micro-nano structure or a negative micro-nano structure.

[0087] In one embodiment, the emission module and the receiving module can be arranged at a certain distance interval; in this case, the first module housing 3 in the emission module and the second module housing 7 in the receiving module can be separated from each other and not connected.

[0088] Figure 10 The structural schematic diagram of the detection module provided by an embodiment of the present application is shown. Refer to Figure 10 In one embodiment, the first module housing 3 in the emission module and the second module housing 7 in the receiving module together form an integrated module housing. The integrated module housing improves the integration degree of the detection module.

[0089] Figure 11 The structural schematic diagram of the detection module provided by an embodiment of the present application is shown. Refer to Figure 11, in one embodiment, a first image sensor 4 is provided in the transmitting module for receiving and sensing the light beam reflected by the first superlens 2; the first image sensor 4 is provided on the light incident side of the first superlens 2. Meanwhile, a second image sensor 6 is provided in the receiving module for sensing the light spot array. Moreover, the first module housing 3 of the transmitting module and the second module housing 7 in the receiving module together form an integral module housing.

[0090] In this case, the first image sensor 4 and the second image sensor 6 are both provided in the internal space of the integral module housing. In this case, the light beam in the internal space of the transmitting module may propagate to the second image sensor 6, thereby causing interference to the second image sensor 6; similarly, the light beam in the internal space of the receiving module may also propagate to the first image sensor 4, thereby causing interference to the first image sensor 4.

[0091] Therefore, in this embodiment, a baffle structure 9 is provided in the integral module housing. The baffle structure 9 is used to isolate the light receiving area of the first image sensor 4 from the internal space of the receiving module, and is used to isolate the light receiving area of the second image sensor 6 from the internal space of the transmitting module, so as to avoid the light beam in the internal space of the transmitting module from interfering with the second image sensor 6, and at the same time avoid the light beam in the internal space of the receiving module from interfering with the first image sensor 4.

[0092] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the appended claims.

Claims

1. A detection module used in a smart home device, the detection module comprising a transmitting module and a receiving module, characterized in that: The emission module includes: a light source; a first super lens; and a first module housing for fixing the light source and the first super lens; The first super lens is arranged on the light output side of the light source; the first super lens is used to collimate the light beam emitted by the light source and output it in a transmission manner, so that the light beam output by the first super lens is projected on the detection object to obtain a light spot array, and the light beam output by the first super lens avoids the target wall; the extension direction of the target wall is parallel to the optical axis of the light beam output by the first super lens.

2. The detection module according to claim 1, characterized in that: The height of the light emitting surface of the first super lens is between the height of the light incident surface of the first super lens and the height of the outer surface of the first module housing; The target wall includes a wall formed by a height difference between a light-emitting surface of the first super lens and an outer surface of the first module housing.

3. The detection module according to claim 1, characterized in that: The target wall includes: the wall of the container where the detection object is located.

4. The detection module according to claim 1, characterized in that: The detection module is arranged at the first end of the target wall body; the detection module is used to detect the detection object from the position of the first end when the detection object enters the space enclosed by the target wall body from the second end of the target wall body.

5. The detection module according to claim 1, characterized in that: Part of the light beam emitted by the light source is also reflected by the first super lens to form a light beam emitted by the first super lens; The transmitting module also includes: a first image sensor; the first image sensor is arranged on the light incident side of the first super lens; the first image sensor is used to receive and sense the light beam reflected by the first super lens.

6. The detection module according to claim 5, characterized in that: A filter film is provided on the first super lens, and the filter film is used to block light beams outside the working band from reaching the first image sensor from the outside of the emission module.

7. The detection module according to claim 1, characterized in that: The receiving module includes: a second image sensor for sensing the light spot array; and a second module housing for fixing the second image sensor.

8. The detection module according to claim 7, characterized in that: The receiving module further includes: a focusing lens; the focusing lens is used to converge the light beam received from outside the receiving module, and output the converged light beam to the second image sensor.

9. The detection module according to claim 8, characterized in that: The focusing lens is a second super lens.

10. The detection module according to claim 7, characterized in that: The first module housing and the second module housing together form an integrated module housing.

11. The detection module according to claim 10, characterized in that: Part of the light beam emitted by the light source is also reflected by the first super lens to form a light beam emitted by the first super lens; the emission module also includes: a first image sensor; the first image sensor is arranged on the light incident side of the first super lens; the first image sensor is used to receive and sense the light beam reflected by the first super lens; The integrated module housing includes a baffle structure, which is used to isolate the light receiving area of ​​the first image sensor from the internal space of the receiving module, and to isolate the light receiving area of ​​the second image sensor from the internal space of the transmitting module.

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