CN212647035U - Optical structure of rainfall sensor and rainfall sensor - Google Patents
Optical structure of rainfall sensor and rainfall sensor Download PDFInfo
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- CN212647035U CN212647035U CN202020737448.2U CN202020737448U CN212647035U CN 212647035 U CN212647035 U CN 212647035U CN 202020737448 U CN202020737448 U CN 202020737448U CN 212647035 U CN212647035 U CN 212647035U
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Abstract
The utility model discloses a rainfall sensor optical structure and rainfall sensor relates to sensor technical field, and the main objective reduces the part quantity of rainfall sensor, reduces the assembly degree of difficulty. The utility model discloses a main technical scheme does: the optical structure of the rainfall sensor comprises an emitting end lens, wherein the emitting end lens comprises at least two light-emitting lenses which are integrally connected; the receiving end lens comprises at least two light receiving lenses which are integrally connected; the at least two light emitting lenses and the at least two light receiving lenses are arranged in a one-to-one opposite mode, and light paths between every two opposite light emitting lenses and every two opposite light receiving lenses are not overlapped.
Description
Technical Field
The utility model relates to a sensor technical field particularly, relates to a rainfall sensor optical structure and rainfall sensor.
Background
With the continuous development and progress of science and technology, locomotives such as subways, light rails and the like are provided with automatic windshield wiper systems for automatically detecting rainfall, and the core component of the system is a rainfall sensor.
The basic principle of the locomotive rainfall sensor is that a light-emitting element emits infrared light with a specific wavelength, the infrared light passes through a light-emitting lens and transparent silica gel on the lens and finally reaches locomotive windshield glass, the infrared light is reflected from the outer surface of the windshield glass and then passes through glass, silica gel and a light-receiving lens to reach an effective sensing area on a light-receiving element. When the locomotive windshield glass has no rain or the rain amount is different, the light amount refracted out through the glass is different, so the total amount of the reflected light is changed, and the rain amount can be judged by analyzing the magnitude of the electric signal generated by the photoelectric type light receiving element. In a sensor for detecting the magnitude of rainfall, such a light emitting element and a light receiving element are combined into one group, and at least two groups are generally required to ensure the reliability of the sensor detection and avoid the malfunction of the wiper. However, in the existing rain sensor on the market, the light emitting lens and the light receiving lens are independent, and if the two groups of light emitting lenses and light receiving lenses are arranged, 4 independent lenses are needed, so that the problems of more parts, complex assembly, inaccurate positioning and the like are caused, and meanwhile, the sensor is large in size, the manufacturing cost and the attractiveness are influenced, and the degree of freedom of the installation position and the flexibility of the installation mode are also influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a rainfall sensor optical structure and rainfall sensor, the main objective reduces the part quantity of rainfall sensor, reduces the assembly degree of difficulty.
In order to achieve the above object, the utility model mainly provides the following technical scheme:
on the one hand, the embodiment of the utility model provides a rainfall sensor optical structure, include:
the light emitting device comprises an emitting end lens and a light emitting lens, wherein the emitting end lens comprises at least two light emitting lenses which are integrally connected;
the receiving end lens comprises at least two light receiving lenses which are integrally connected;
the at least two light emitting lenses and the at least two light receiving lenses are arranged in a one-to-one opposite mode, and light paths between every two opposite light emitting lenses and every two opposite light receiving lenses are not overlapped.
Further, the light emitting lens and the light receiving lens respectively comprise a convex lens and a special-shaped prism group integrally connected with the convex lens;
the special-shaped prism groups of the two light-emitting lenses are integrally connected, and the two light-emitting lenses are symmetrical to each other;
the special-shaped prism groups of the two light receiving lenses are integrally connected, and the two light receiving lenses are symmetrical to each other.
Further, the light emitting lens has a first optical surface and a second optical surface;
the angles of the two first optical surfaces and the second optical surface relative to the horizontal plane are 60 degrees and 0 degrees respectively.
Further, the light receiving lens has a third optical surface and two fourth optical surfaces;
the angles of the third optical surface and the two fourth optical surfaces relative to the horizontal plane are respectively 0 degrees, 60 degrees and 90 degrees.
Further, the prism surface of the shaped prism group of the light emitting lens and the prism surface of the shaped prism group of the light receiving lens are symmetrical with respect to the raindrop sensing center.
On the other hand, the embodiment of the utility model provides a still provides a rain sensor, including aforementioned rain sensor optical structure.
Borrow by above-mentioned technical scheme, the utility model discloses following beneficial effect has at least:
the embodiment of the utility model provides a technical scheme constitutes transmitting terminal lens through connecting at least two luminous lens an organic whole, and constitutes receiving terminal lens with at least two photic lens an organic whole, and the luminous lens of transmitting terminal lens and receiving terminal lens and the light path between the photic lens do not have the overlap, thereby guaranteed optical structure's normal work, compare with prior art, the embodiment of the utility model provides a rainfall sensor optical structure has only two parts, thereby has reduced the part quantity of rainfall sensor, has reduced the assembly degree of difficulty, has improved the location accuracy, simultaneously, can also reduce the volume and the cost of sensor, and the appearance is more small and exquisite, and the mounted position is more free, and the mounting means is more nimble.
Drawings
Fig. 1 is a schematic structural diagram of an optical structure of a rainfall sensor at a first viewing angle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an optical structure of a rainfall sensor at a second viewing angle according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an optical path structure between the lens at the transmitting end and the lens at the receiving end in FIG. 1 or FIG. 2;
fig. 4 is a schematic view of an optical path structure when the lens at the transmitting end and the lens at the receiving end are attached to the silica gel pad in fig. 1 or fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1 and fig. 3, an embodiment of the present invention provides an optical structure of a rain sensor, including an emitter lens 1, which includes at least two light emitting lenses 11, where at least the two light emitting lenses 11 are integrally connected; a receiving end lens 2 including at least two light receiving lenses 21, at least the two light receiving lenses 21 being integrally connected; the at least two light emitting lenses 11 and the at least two light receiving lenses 21 are arranged in a one-to-one opposite mode, and light paths between every two opposite light emitting lenses 11 and every two opposite light receiving lenses 21 are not overlapped. In fig. 3, reference numeral "100" denotes an optical path.
The embodiment of the utility model provides a rainfall sensor optical structure constitutes transmitting terminal lens 1 through connecting 11 a body of at least two luminescent lens, and constitute receiving terminal lens 2 with 21 a body of at least two photic lens, and the light path between luminescent lens 11 and the photic lens 21 of transmitting terminal lens 1 and receiving terminal lens 2 does not have the overlap, thereby has guaranteed optical structure's normal work, compares with prior art, the embodiment of the utility model provides a rainfall sensor optical structure only has two parts, thereby has reduced rainfall sensor's part quantity, has reduced the assembly degree of difficulty, has improved the location accuracy, simultaneously, can also reduce sensor's volume and cost, and the appearance is more small and exquisite pleasing to the eye, and the mounted position is more free, and the mounting means is more nimble.
In an alternative embodiment, referring to fig. 1 and 2, the light emitting lens 11 and the light receiving lens 21 of the emitting end lens 1 and the receiving end lens 2 may respectively include a convex lens (111, 211) and a profiled prism group (112,212) integrally connected with the convex lens (111, 211); the special-shaped prism groups (112,212) of the two light-emitting lenses 11 are integrally connected, and the two light-emitting lenses 11 are symmetrical to each other; the profiled prism groups (112,212) of the two light receiving lenses 21 are integrally connected, and the two light receiving lenses 21 are symmetrical to each other.
In the above embodiment, the convex lenses (111, 211) of the light emitting lens 11 and the light receiving lens 21 can perform a light collimation function, so that light emitted by the light emitting diode can be collimated into parallel light, and the sensing signal intensity of the raindrop sensing area is improved; the special-shaped prism group (112,212) can play a role of turning light rays, so that the propagation loss of light can be reduced, the optical efficiency is improved, and the sensitivity of the sensor is improved. Moreover, the two light emitting lenses 11 and the two light receiving lenses 21 are respectively and symmetrically arranged, so that the light paths between each pair of light emitting lenses 11 and each pair of light receiving lenses 21 can be well ensured not to be overlapped, namely, the light paths between the light emitting lenses 11 and the light receiving lenses 21 are not interfered with each other, and the normal operation of the optical structure is better ensured.
In an alternative embodiment, referring to fig. 2, the light emitting lens 11 of the emission end lens 1 may have a first optical surface 113 and a second optical surface 114; and the angles of the first and second optical surfaces 113 and 114 with respect to the horizontal plane may be 0 ° and 60 °, respectively. By providing the first optical surface 113 for reflecting light such that the light-emitting components are arranged horizontally rather than at a specific angle, the light can be reflected toward the corresponding area of the windshield of the locomotive after entering the lens, thereby making the positioning of the light-emitting components easier and the assembly simpler. Moreover, the more the reflection times of the light in the lens, the better the anti-interference effect, but at the same time, a certain degree of light attenuation will also be generated, and since there is no interference problem in the light emitting lens, the embodiment selects to set one first optical surface 113, and performs the least reflection times once. In addition, the second optical surface 114 is a transmission surface, and as can be seen from fig. 4, the second optical surface 114 is tightly attached to the lower surface of the silicone pad 101, so that when light passes through, the light can be transmitted and reach the outer surface of the windshield glass 102 to be reflected, and thus the function of the sensor is realized.
In an alternative embodiment, referring to fig. 2 and 4, the light receiving lens 21 of the receiving end lens 2 may have a third optical surface 213 and two fourth optical surfaces 214; and the angles of the third optical surface 213 and the two fourth optical surfaces 214 with respect to the horizontal plane are 0 °, 60 °, and 90 °, respectively. The third optical surface 213 is arranged to be closely attached to the lower surface of the silicone pad 101, so that the third optical surface can be a transmission surface, and light reflected from the outer surface of the windshield 102 passes through the silicone pad 101 and then is transmitted from the surface to irradiate the light receiving lens 21; then, two fourth optical surfaces 214 are provided for reflecting light, so that on one hand, the light receiving element is horizontally arranged instead of being arranged at a specific angle, and the light irradiated from the light receiving lens 21 can be received, so that the light receiving element is easy to position and assemble. On the other hand, the two fourth optical surfaces 214 perform two reflections, so that the anti-interference effect can be improved, and a large light attenuation cannot be generated at the same time. Because the light receiving lens is a path for receiving light, consideration needs to be given to only allowing light in a specific direction to pass through the lens and reach the light receiving element, and stray light in other directions is eliminated as much as possible; however, it should be considered that the number of reflections is not too large, which increases the light attenuation and makes the lens manufacturing more complicated.
In an alternative embodiment, the prism faces of the shaped prism group (112,212) of the light emitting lens 11 of the transmitting end lens 1 and the prism faces of the shaped prism group (112,212) of the light receiving lens 21 of the receiving end lens 2 are symmetrical with respect to the raindrop sensing center. By designing the light window (prism surface) of the light emitting lens 11 and the light window (prism surface) of the light receiving lens 21 to be symmetrical with respect to the raindrop sensing center, it is possible to ensure that light coming out of the light emitting window is reflected back to the light receiving window with retention at most, thereby improving the efficiency of the rainfall sensor. Simultaneously, the design can lead the rainfall sensor to look more concise and uniform, and the appearance is more beautiful.
The embodiment of the utility model provides a rainfall sensor is still provided, including aforementioned rainfall sensor optical structure.
The embodiment of the utility model provides a rainfall sensor, including rainfall sensor optical structure, this optical structure constitutes transmitting terminal lens 1 through connecting 11 a body of at least two luminescent lens, and constitute receiving terminal lens 2 with 21 a body of at least two photic lens, and the light path between emitting terminal lens 1 and receiving terminal lens 2's luminescent lens 11 and photic lens 21 does not have the overlapping, thereby has guaranteed optical structure's normal work, compares with prior art, the embodiment of the utility model provides a rainfall sensor optical structure only has two parts, thereby has reduced rainfall sensor's part quantity, has reduced the assembly degree of difficulty, has improved the location accuracy, simultaneously, can also reduce the volume and the cost of sensor, and the appearance is more small and exquisite pleasing to the eye, and the mounted position is more degree of freedom, and the mounting means is more nimble.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A rain sensor optical structure, comprising:
the light emitting device comprises an emitting end lens and a light emitting lens, wherein the emitting end lens comprises at least two light emitting lenses which are integrally connected;
the receiving end lens comprises at least two light receiving lenses which are integrally connected;
the at least two light emitting lenses and the at least two light receiving lenses are arranged in a one-to-one opposite mode, and light paths between every two opposite light emitting lenses and every two opposite light receiving lenses are not overlapped.
2. The optical structure of a rain sensor according to claim 1,
the light emitting lens and the light receiving lens respectively comprise a convex lens and a special-shaped prism group integrally connected with the convex lens, and the special-shaped prism group is used for turning light;
the special-shaped prism groups of the two light-emitting lenses are integrally connected, and the two light-emitting lenses are symmetrical to each other;
the special-shaped prism groups of the two light receiving lenses are integrally connected, and the two light receiving lenses are symmetrical to each other.
3. The optical structure of a rain sensor according to claim 2,
the light emitting lens has a first optical surface and a second optical surface;
the first and second optical surfaces have angles of 60 ° and 0 °, respectively, with respect to a horizontal plane.
4. The optical structure of a rain sensor according to claim 2,
the light receiving lens is provided with a third optical surface and two fourth optical surfaces;
the angles of the third optical surface and the two fourth optical surfaces relative to the horizontal plane are respectively 0 degrees, 60 degrees and 90 degrees.
5. The optical structure of a rain sensor according to claim 2,
the prism surface of the special-shaped prism group of the light emitting lens and the prism surface of the special-shaped prism group of the light receiving lens are symmetrical about the raindrop sensing center.
6. A rain sensor, comprising:
the optical structure of a rain sensor according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020737448.2U CN212647035U (en) | 2020-05-07 | 2020-05-07 | Optical structure of rainfall sensor and rainfall sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020737448.2U CN212647035U (en) | 2020-05-07 | 2020-05-07 | Optical structure of rainfall sensor and rainfall sensor |
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| Publication Number | Publication Date |
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| CN212647035U true CN212647035U (en) | 2021-03-02 |
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| CN202020737448.2U Active CN212647035U (en) | 2020-05-07 | 2020-05-07 | Optical structure of rainfall sensor and rainfall sensor |
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| CN (1) | CN212647035U (en) |
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- 2020-05-07 CN CN202020737448.2U patent/CN212647035U/en active Active
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