CN219037976U

CN219037976U - Sunlight sensor with direction recognition capability

Info

Publication number: CN219037976U
Application number: CN202223334294.0U
Authority: CN
Inventors: 吴志纲; 许军; 梁厚勋
Original assignee: Shanghai Wenxiang Automotive Sensors Co Ltd
Current assignee: Shanghai Wenxiang Automotive Sensors Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-16
Anticipated expiration: 2032-12-12

Abstract

The utility model relates to a sunlight sensor with direction recognition capability, comprising: the incident surface of the lens is a plane, the emergent surface of the lens is divided into a left concave curved surface and a right concave curved surface, and the left concave curved surface and the right concave curved surface are symmetrical with each other about the central axis of the lens; the device comprises a left concave curved surface, a right concave curved surface, a first photosensitive element and a second photosensitive element, wherein the first photosensitive element is positioned below the left concave curved surface, and the second photosensitive element is positioned below the right concave curved surface. The utility model can ensure the sensitivity of the sensor, so that the whole sensor is more compact.

Description

Sunlight sensor with direction recognition capability

Technical Field

The utility model relates to the technical field of automobile sensors, in particular to a sunlight sensor with direction recognition capability.

Background

Along with the improvement of the intelligent level of the automobile, the assembly rate of the vehicle-mounted automatic air conditioner is rapidly improved, the automatic air conditioner system needs to use a sunlight sensor to sense the external sunlight intensity and the external sun azimuth, and the air conditioner system controls the temperature, the air quantity and the like of the air conditioner through the sunlight intensity and the sun azimuth output by the sunlight sensor. However, the traditional single-channel sunlight sensor has only one output due to the limitation of the structure, so that the sun direction cannot be identified, and if the light intensities at the left side and the right side are different, the detection is not accurate enough. If the sun light sensor is designed in a double-channel mode, two groups of optical lenses are needed to be adopted to sense the light intensity on the left side and the right side respectively, so that the overall size of the sensor is increased, and the sun light sensor cannot be integrated with other sensors.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a sunlight sensor with direction recognition capability, which can ensure the sensitivity of the sensor and make the whole sensor more compact.

The technical scheme adopted for solving the technical problems is as follows: there is provided a sunlight sensor having a direction recognition capability, comprising:

the incident surface of the lens is a plane, the emergent surface of the lens is divided into a left concave curved surface and a right concave curved surface, and the left concave curved surface and the right concave curved surface are symmetrical with each other about the central axis of the lens;

the device comprises a left concave curved surface, a right concave curved surface, a first photosensitive element and a second photosensitive element, wherein the first photosensitive element is positioned below the left concave curved surface, and the second photosensitive element is positioned below the right concave curved surface.

The corresponding emergent surface of the left concave curved surface is convex when the incident light is 40-50 degrees in the right azimuth angle, and the corresponding emergent surface of the right concave curved surface is convex when the incident light is 40-50 degrees in the left azimuth angle.

The incident surface of the lens is attached to the automobile windshield.

The incident surface of the lens is attached to the automobile windshield through an adhesive.

The adhesive is a silica gel adhesive.

The first photosensitive element is positioned right below the left concave curved surface, and the second photosensitive element is positioned right below the right concave curved surface.

The first photosensitive element is positioned at the convergence center of the left concave curved surface, and the second photosensitive element is positioned at the convergence center of the right concave curved surface.

The center distance between the first photosensitive element and the second photosensitive element is smaller than or equal to 4mm.

Advantageous effects

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following advantages and positive effects: the utility model divides the emergent surface of the single lens into two symmetrical concave surfaces, so that the light incident from the left side is easier to be incident into the right side photosensitive element, and the light incident from the right side is easier to be incident into the left side photosensitive element, thereby realizing the judgment of the sun azimuth.

Drawings

FIG. 1 is a perspective view of a sunlight sensor having direction identification capabilities according to an embodiment of the present utility model;

FIG. 2 is a side view of a sun light sensor with direction identification capabilities according to an embodiment of the present utility model;

FIG. 3 is a schematic view of light incident at different angles in an embodiment of the present utility model;

FIG. 4 is a schematic view of the exit surface of a sunlight sensor with direction recognition capabilities according to an embodiment of the present utility model;

FIG. 5 is a graph showing the intensity of light received by the photosensitive element for light incident at different angles in an embodiment of the present utility model;

FIG. 6 is a schematic diagram of the angular and azimuthal relationship in an embodiment of the utility model.

Detailed Description

The utility model will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the claims appended hereto.

Embodiments of the present utility model relate to a sunlight sensor having a direction recognition capability, as shown in fig. 1 and 2, including: the lens 1, the incident surface 11 of the lens 1 is a plane, the emergent surface is divided into a left concave curved surface 12 and a right concave curved surface 13, and the left concave curved surface 12 and the right concave curved surface 13 are symmetrical with each other about the central axis of the lens 1; the first photosensitive element 2 and the second photosensitive element 3, the first photosensitive element 2 is positioned below the left concave curved surface 12, and the second photosensitive element 3 is positioned below the right concave curved surface 13.

The lens 1 in this embodiment is an integrated bilateral symmetry structure, and the left concave curved surface 12 and the right concave curved surface 13 are concave lens structures, as shown in fig. 3, which can disperse light, thereby increasing the sensing angle range of the lens and making solar energy with more azimuth angles incident into the sensing element.

In practical use, the incident surface 11 of the lens 1 is bonded to the windshield 5 of the automobile by the adhesive 4. Wherein, the adhesive can be transparent silica gel adhesive. The sunlight sequentially passes through the windshield 5, the silica gel and the lens 1 and finally enters the first photosensitive element 2 and the second photosensitive element 3, when the sun is positioned on the left side of the sensor, the sunlight is easier to enter the second photosensitive element 3 on the right side, when the sun is positioned on the right side of the sensor, the sunlight is easier to enter the first photosensitive element 2 on the left side, and the direction of the sun can be generally judged through the light intensity signal difference of the two photosensitive elements. The first photosensitive element 2 and the second photosensitive element 3 transmit light intensity signals to a vehicle control system, and the vehicle control system can judge the temperature difference between the body temperature of the main driver and the body temperature of the co-driver according to the current light intensity signals, so that the air conditioning temperature settings on the left side and the right side are respectively given by controlling an air conditioning system.

Preferably, the left concave curved surface 12 and the right concave curved surface 13 in the present embodiment can be further optimized and adjusted, and the present embodiment finds the lens exit surface area corresponding to each induced azimuth angle by performing optical simulation on the lens 1. In order to make the intensity of the left channel constant in the area of 40-50 ° of right azimuth angle, the corresponding exit surface 121 of the left concave curved surface 12 is convex (see fig. 4), so that the originally divergent light is adjusted to convergent light in this area, and thus the intensity curve in the area of 40-50 ° of right azimuth angle forms a constant level curve, specifically, see fig. 5, a in fig. 5 is the intensity curve of the second photosensitive element, and B is the intensity curve of the first photosensitive element. And similarly, the right concave curved surface can be subjected to the same optimized design, so that the symmetry of the left concave curved surface and the right concave curved surface is ensured.

In this embodiment, the intensity profile induced is determined only by the exit face of the lens 1, i.e. the surface closest to the first and second photosensitive elements. To ensure this, the incident surface of the lens 1, the upper and lower surfaces of the silicone adhesive, the upper and lower surfaces of the windshield 1 are parallel surfaces. In this embodiment, the windshield has a certain curvature, but basically can be regarded as a parallel surface, so that the strength curve of this embodiment is not affected.

Fig. 6 shows the angle and azimuth relation according to the present embodiment, and the present system relates to only the angle above the horizontal surface and the altitude angle is from 0 to 90 ° due to the positional relation of the sun. With the vertical surface as the left-right interface, the vehicle is oriented at 0 ° forward, the left azimuth area is 0 to minus 180 °, and the right azimuth is 0 to 180 °. The height angle in the figure is 45 degrees, the direction angle is minus 45 degrees, and the maximum induction angle of the left channel is shown. Through the design and optimization of the optical surface of the lens, the embodiment can obtain the maximum induction intensity of the right photosensitive element at the sun altitude of 45 degrees, the left azimuth of 45 degrees and the left photosensitive element at the right azimuth of 45 degrees.

It is easy to find that the emergent surface of the single lens is divided into two symmetrical concave surfaces, so that light rays incident on the left side are easier to be incident on the right side photosensitive element, and light rays incident on the right side are easier to be incident on the left side photosensitive element, thereby realizing judgment on the sun direction.

Claims

1. A sunlight sensor having direction recognition capability, comprising:

a first photosensitive element and a second photosensitive element, wherein the first photosensitive element is positioned below the left concave curved surface, and the first photosensitive element is positioned below the left concave curved surface

The second photosensitive element is positioned below the right concave curved surface.

2. The sunlight sensor with direction recognition capability according to claim 1, wherein the left concave curved surface has a convex shape corresponding to an exit surface when the incident light is 40-50 ° in right azimuth, and the right concave curved surface has a convex shape corresponding to an exit surface when the incident light is 40-50 ° in left azimuth.

3. The sunlight sensor with direction recognition capability of claim 1 wherein the entrance face of the lens is in contact with an automotive windshield.

4. A sunlight sensor having direction recognition capabilities according to claim 3, wherein said lens is bonded to an automobile windshield by an adhesive.

5. The sunlight sensor having direction identification capability of claim 4 wherein said adhesive is a silicone adhesive.

6. The sunlight sensor with direction recognition capability of claim 1 wherein the first photosensitive element is located directly below the left concave curved surface and the second photosensitive element is located directly below the right concave curved surface.

7. The sunlight sensor with direction recognition capability of claim 6, wherein the first photosensitive element is located at a center of convergence of the left concave curved surface and the second photosensitive element is located at a center of convergence of the right concave curved surface.

8. The sunlight sensor with direction recognition capability of claim 1 wherein the first photosensitive element and the second photosensitive element have a center-to-center distance of less than or equal to 4mm.