CN216526363U - Lens structure for intelligent doorbell - Google Patents
Lens structure for intelligent doorbell Download PDFInfo
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- CN216526363U CN216526363U CN202123267276.0U CN202123267276U CN216526363U CN 216526363 U CN216526363 U CN 216526363U CN 202123267276 U CN202123267276 U CN 202123267276U CN 216526363 U CN216526363 U CN 216526363U
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Abstract
The utility model discloses a lens structure for an intelligent doorbell, which comprises an arc-shaped mirror body, wherein the projection of the mirror body is circular, and the mirror body is sequentially divided into an upper visual area, a middle visual area and a lower visual area; the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of lens units, and the lens units are lens sheets provided with Fresnel grains and are focused on the induction position of a pyroelectric sensor of the intelligent doorbell; the height of the lens unit in the middle visual area is larger than the sum of the heights of the lens units in the upper visual area and the lower visual area. The lens structure provided by the utility model realizes a large-angle detection sensing range, has multiple trigger points, and provides necessary hardware support for meeting the requirement of an intelligent doorbell on peripheral environment detection.
Description
Technical Field
The utility model belongs to the technical field of optical accessories, and particularly relates to a lens structure for an intelligent doorbell.
Background
The intelligent doorbell is more and more widely applied in life, the functional design is more and more perfect, an infrared induction function for detecting the movement of a human body is also applied, a passive infrared detection technology is applied to the function, and the passive infrared detection technology needs two key elements, namely a pyroelectric infrared sensor (PIR) and a Fresnel lens; the pyroelectric infrared sensor (PIR) can convert infrared signal change into an electric signal and has an inhibiting effect on white light signals in nature, when no human body moves, the pyroelectric infrared sensor senses only background temperature, and when a human body enters a detection area, the pyroelectric infrared sensor senses a difference signal between the human body temperature and the background temperature through a Fresnel lens; the fresnel lens acts two ways: firstly, the focusing effect, be about to the infrared signal refraction (reflection) of releasing heat on the PIR, the second effect is with dividing into a plurality of bright district and dark space in the alert district, makes the removal object that gets into the alert district can produce the infrared signal of releasing heat of change on the PIR with the form of temperature variation, and the PIR just can produce the signal of telecommunication of change like this.
The lens structure applied to the intelligent doorbell in the prior art is single, so that the problems of small detection angle, small visual area range, easy false triggering and the like are caused, and the requirement of the intelligent doorbell on the human body detection function of the surrounding environment cannot be well met.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lens structure for an intelligent doorbell, which can realize a large-angle detection induction range when being applied to the intelligent doorbell through the partition layout of the lens and the optical design of the focal length.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
a lens structure for an intelligent doorbell comprises an arc-shaped mirror body, wherein the projection of the mirror body is circular, and the mirror body is sequentially divided into an upper visual area, a middle visual area and a lower visual area; the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of lens units, and the lens units are lens sheets provided with Fresnel lines and focused on the induction positions of the pyroelectric sensors of the intelligent doorbell; the height of the lens unit of the middle layer visual area is greater than the sum of the heights of the lens units of the upper layer visual area and the lower layer visual area.
Furthermore, all the lens units of the upper visual area are arranged in parallel; the circle center of the concentric circle of the Fresnel line positioned on the left edge lens unit is deviated to the left, the circle center of the concentric circle of the Fresnel line positioned on the right edge lens unit is deviated to the right, and the circle center of the concentric circle of the Fresnel line positioned on the middle lens unit is positioned on the vertical central line of the concentric circle.
Furthermore, the lens units in the middle layer visual area are arranged in parallel below the upper layer visual area, the center of a concentric circle of Fresnel lines of each lens unit is positioned at a position which is lower than the vertical central line of the lens unit, the height of the lens unit positioned at the left edge and the right edge is lower than the height of each lens unit between the left edge lens unit and the right edge lens unit, and the center of a concentric circle of Fresnel lines of the left edge lens unit and the right edge lens unit is lower than the center of a concentric circle of Fresnel lines of each lens unit between the left edge lens unit and the right edge lens unit.
Furthermore, the lens units in the lower visual area are arranged in parallel below the middle visual area, and the circle center of the concentric circle of the Fresnel lines of each lens unit is positioned in the middle of the vertical center line of the lens unit.
Compared with the prior art, the utility model has the following beneficial effects:
the lens structure provided by the utility model ingeniously utilizes the Fresnel principle, and aims at the application requirement of installing infrared induction on the intelligent doorbell, the wide-angle detection induction range is realized through the visual area design of the lens and the optical texture design in the visual area, the number of trigger points is large, and necessary hardware support is provided for meeting the requirement of the intelligent doorbell on peripheral environment detection.
Drawings
FIG. 1 is a schematic diagram of a lens structure according to an embodiment of the utility model.
Wherein:
1. an upper viewing zone; 2. a middle layer viewing zone; 3. and a lower layer visual area.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The utility model is further described with reference to the following figures and examples.
The lens structure provided by the utility model is applied to an intelligent doorbell, infrared detection is formed by focusing an infrared signal on a pyroelectric sensor in the intelligent doorbell structure through the lens structure, the inclination angle of the detection position where the lens structure is located is 0 degree, and the walking speed of a human body is detected to be about 1 m/s.
The embodiment of the utility model provides a schematic view of a lens structure as shown in fig. 1, wherein a lens body is in an outward convex arc shape, a front projection view is in a circular shape, as shown in fig. 1, the lens structure mainly comprises three visual areas which are longitudinally arranged and respectively comprise an upper visual area 1, a middle visual area 2 and a lower visual area 3, each visual area comprises a plurality of lens units with Fresnel grains, the lens units are combined to form the whole lens body, and a detection structure with a large angle and a large visual area range is formed by matching with 1 pyroelectric infrared sensor PIR in an intelligent doorbell.
The upper layer visual area 1, the middle layer visual area 2 and the lower layer visual area 3 respectively detect the upper direction, the forward direction and the lower direction; the upper layer visual area 1 and the lower layer visual area 3 are respectively 3 lens units, and the middle layer visual area 2 is 5 lens units. The distance between the centers of the concentric circles of the Fresnel lines of the two lens units at the outermost side of each visual area determines the horizontal sensing angle of the visual area.
3 lens units of the upper visual area 1 are arranged in parallel; the circle center of the concentric circle of the Fresnel line positioned on the left edge lens unit is deviated to the left, the circle center of the concentric circle of the Fresnel line positioned on the right edge lens unit is deviated to the right, the circle center of the concentric circle of the Fresnel line positioned on the middle lens unit is positioned on the vertical central line of the concentric circle, and the left and right induction detection angles are 60 degrees.
The 5 lens units of the middle-layer visual area 2 are arranged in parallel below the upper-layer visual area 1, the height of each lens unit is greater than the sum of the heights of the lens units of the upper-layer visual area 1 and the lower-layer visual area 3 and is far greater than the respective heights of the lens units of the upper-layer visual area 1 and the lower-layer visual area 3, and the detection area of the middle-layer visual area 2 is enlarged; the circle centers of the concentric circles of the Fresnel lines of each lens unit of the middle-layer visual area 2 are positioned at the lower positions of the vertical central lines of the lens units, the heights of the lens units positioned at the left edge and the right edge are lower than the heights of each lens unit between the left edge lens unit and the right edge lens unit, and the circle centers of the concentric circles of the Fresnel lines of the left edge lens unit and the right edge lens unit are lower than the circle centers of the concentric circles of the Fresnel lines of each lens unit between the left edge lens unit and the right edge lens unit; the left and right induction detection angles of the middle layer view area 2 reach 120 degrees.
The lens units of the lower-layer visual area 3 are arranged in parallel below the middle-layer visual area 2, the circle center of a concentric circle of Fresnel lines of each lens unit is located at the middle position of the vertical center line of the lens unit, and the left and right induction detection angles of the lower-layer visual area 3 reach 80 degrees.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A lens structure for an intelligent doorbell is characterized by comprising an arc-shaped mirror body, wherein the projection of the mirror body is circular, and the mirror body is sequentially divided into an upper visual area, a middle visual area and a lower visual area; the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of lens units, and the lens units are lens sheets provided with Fresnel lines and are focused on the sensing position of a pyroelectric sensor of the intelligent doorbell; the height of the lens unit of the middle layer visual area is greater than the sum of the heights of the lens units of the upper layer visual area and the lower layer visual area.
2. The lens structure for the intelligent doorbell of claim 1, wherein the lens units of the upper viewing zone are arranged side by side; the circle center of the concentric circle of the Fresnel line positioned on the left edge lens unit is deviated to the left, the circle center of the concentric circle of the Fresnel line positioned on the right edge lens unit is deviated to the right, and the circle center of the concentric circle of the Fresnel line positioned on the middle lens unit is positioned on the vertical central line of the concentric circle.
3. The lens structure of claim 1, wherein the lens units in the middle viewing area are arranged in parallel below the upper viewing area, the center of a concentric circle of Fresnel lines of each lens unit is located at a position lower than the vertical center line of the lens unit, the height of the lens unit located at the left edge and the height of the lens unit located at the right edge are lower than the height of each lens unit located between the left edge and the right edge, and the center of a concentric circle of Fresnel lines of the lens units located at the left edge and the right edge is lower than the center of a concentric circle of Fresnel lines of each lens unit located between the left edge and the right edge.
4. The lens structure of claim 1, wherein the lens units in the lower viewing area are arranged in parallel below the middle viewing area, and the center of a concentric circle of the Fresnel line of each lens unit is located at the middle position of the vertical center line of the lens unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123267276.0U CN216526363U (en) | 2021-12-23 | 2021-12-23 | Lens structure for intelligent doorbell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123267276.0U CN216526363U (en) | 2021-12-23 | 2021-12-23 | Lens structure for intelligent doorbell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216526363U true CN216526363U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123267276.0U Active CN216526363U (en) | 2021-12-23 | 2021-12-23 | Lens structure for intelligent doorbell |
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|---|---|
| CN (1) | CN216526363U (en) |
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2021
- 2021-12-23 CN CN202123267276.0U patent/CN216526363U/en active Active
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