Novel rainfall sensor

Abstract

The utility model discloses a novel rainfall sensor, which belongs to the technical field of rainfall sensors and comprises a transmitting end lens and a receiving end lens, and one side of the transmitting end lens and one side of the receiving end lens opposite to glass are respectively provided with a transmitting source and a receiving element. The transmitting end of the transmitting source faces the transmitting end lens; the receiving end of the receiving element faces the receiving end lens; one side of the receiving end lens is integrally formed with an extension connecting end part, and one end, far away from the receiving end lens, of the extension connecting end part and the receiving element are arranged together, so that part of light totally reflected back to the receiving end lens can reach the receiving element; and the transmitting end lens and the receiving end lens are bonded on the inner side surface of the glass through a silica gel bonding layer. According to the utility model, the extension connecting end part of the receiving end lens is directly attached to the receiving element, so that part of the light which is totally reflected back to the receiving end lens can reach the receiving element, and the utilization efficiency and the receiving sensitivity of the light are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rain sensor technical field, especially a new rain sensor. BACKGROUND

[0002] Rain sensor, adopt infrared LED as signal light source, utilize the emission end lens to be collimated to the LED and emit infrared signal light oblique incidence into the car windshield glass. When the oblique incidence signal light meets the angle requirement of glass total reflection, the signal light will be reflected to the receiving end lens, and after the focusing of the receiving end lens, it will converge on the receiving element. When there are raindrops on the windshield glass, the total reflection condition is destroyed, and the infrared signal light is directly emitted from the upper end of the glass, and no longer returns to the receiving element to receive the signal, thereby judging that there are raindrops on the windshield glass, and starting the wiper, so as to realize the function of automatic wiper.

[0003] The applicant discloses a new rain sensor in the utility model patent with the patent name "a new rain sensor" with the application number CN202222369719.5. By increasing the number of arc-shaped total reflection mirrors and adjusting the irradiation position and irradiation angle of the emission source, the utilization efficiency of the infrared sensing light emitted by the emission source is improved. A lower power emission source can be used to meet the use requirements, and the installation and debugging of the rain sensor are more convenient. After long-term use, the applicant found that the connection between the receiving element and the lens is not directly attached, and there is a certain air gap, which can easily reduce the light transmission efficiency and affect the receiving sensitivity of the sensor. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a new rain sensor to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a new rain sensor, comprising an emission end lens and a receiving end lens arranged on the inner side of the glass, the emission end lens and the receiving end lens have an emission source and a receiving element on the side away from the glass, respectively;

[0006] The emission end of the emission source faces the emission end lens;

[0007] The receiving end of the receiving element faces the receiving end lens;

[0008] The side away from the glass of the receiving end lens is integrally formed with an extended connection end portion, one end of the extended connection end portion away from the receiving end lens is arranged together with the receiving end of the receiving element, so that part of the light totally reflected onto the receiving end lens will reach the receiving element, and the emission end lens and the receiving end lens are adhered on the inner side of the glass through a silica gel adhesive layer.

[0009] Preferably, the extension connecting end part is adhered to the receiving end of the receiving element by silica gel, away from one end of the receiving end lens.

[0010] Preferably, the side of the transmitting end lens away from the receiving end lens is provided with a first total reflection mirror and a second total reflection mirror.

[0011] Preferably, the first total reflection mirror and the second total reflection mirror are in arc-shaped structures, and the radius size of the first total reflection mirror is smaller than that of the second total reflection mirror.

[0012] Preferably, the back surfaces of the transmitting source and the receiving element are both fixed with clamping plates, the inside of each clamping plate is clamped with a mounting support, and the mounting support is fixed on a required fixed object.

[0013] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0014] The receiving end lens of the novel rain sensor is designed in a light guiding manner, and the extension connecting end part is directly attached to the receiving element. This design ensures that as much light as possible reflected from the receiving end lens can be transmitted to the receiving element, greatly improving the light utilization efficiency and receiving sensitivity. Compared with the traditional method, this design reduces light loss and enhances the response ability of the sensor to weak light changes.

[0015] The extension connecting end part and the receiving element are adhered by silica gel, which not only provides good sealing performance to prevent water vapor from entering and help light import, but also has a certain elasticity to absorb slight mechanical impact and protect the internal components. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Fig. 1 It is a structural schematic diagram of the prior art of the utility model;

[0018] Fig. 2 It is a structural schematic diagram of the extension connecting end part and the receiving element connected together of the utility model;

[0019] Fig. 3 It is a connection structure schematic diagram of the transmitting source of the utility model.

[0020] EXPLANATION OF REFERENCE NUMERALS:

[0021] In the figure: 1, the emission source; 2, the receiving element; 3, the silica gel adhesive layer; 4, the emission end lens; 5, the receiving end lens; 6, the first total reflection mirror; 7, the second total reflection mirror; 8, the extended connecting end; 9, the clamping plate; 10, the mounting support. DETAILED DESCRIPTION

[0022] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features known to the art are not described in order not to obscure the present application.

[0023] Unless the direction defined separately, the up, down, left, right, front, back, inside and outside and other directions referred to in this paper are based on the up, down, left, right, front, back, inside and outside and other directions in the figure shown by the present application, which are explained here.

[0024] The present embodiment provides a new rain sensor as shown in Figs. 1 to 3 The present embodiment provides a new rain sensor as shown in

[0025] The emission end of the emission source 1 is directed towards the emission end lens 4.

[0026] The receiving end of the receiving element 2 is directed towards the receiving end lens 5.

[0027] The receiving end lens 5 has an extended connecting end 8 integrally formed on the side away from the glass, and the end of the extended connecting end 8 away from the receiving end lens 5 is arranged together with the receiving end of the receiving element 2, so that all the light reflected back to the receiving end lens 5 will have part reaching the receiving element 2, and the emission end lens 4 and the receiving end lens 5 are adhered to the inner side of the glass through the silica gel adhesive layer 3.

[0028] In the present embodiment, the end of the extended connecting end 8 away from the receiving end lens 5 is adhered to the receiving end of the receiving element 2 through the silica gel.

[0029] In the present embodiment, the side of the emission end lens 4 away from the receiving end lens 5 is provided with the first total reflection mirror 6 and the second total reflection mirror 7.

[0030] In the present embodiment, the first total reflection mirror 6 and the second total reflection mirror 7 are in arc shape structure, and the radius size of the first total reflection mirror 6 is smaller than that of the second total reflection mirror 7.

[0031] The back of the transmitting source 1 and the receiving element 2 is fixed with a clamping plate 9, the inside of each clamping plate 9 is clamped with a mounting support 10, and the mounting support 10 is fixed on the required fixed object.

[0032] Working principle:

[0033] When the transmitting source 1 is started, light is generated, and the light is shaped and focused by the transmitting end lens 4. The transmitting end lens 4 adjusts the light from the transmitting source 1 into a parallel beam to ensure that the light can effectively cover the working area of the sensor. After the light passes through the transmitting end lens 4, it will encounter the first total reflection mirror 6 and the second total reflection mirror 7. The two total reflection mirrors are arc-shaped and have different radii, which are used to guide the light to propagate on the path. When there is no rain, the light will be reflected back and forth between the two total reflection mirrors, and finally returned to the receiving end lens 5.

[0034] When rain falls on the outer surface of the glass, the receiving end lens 5 collects the light reflected from the first total reflection mirror 6 and the second total reflection mirror 7 and focuses it to the extended connecting end 8. Since the receiving end lens 5 adopts a light guiding design, it can more efficiently conduct light to the receiving element 2.

[0035] The extended connecting end 8 is directly attached to the receiving element 2, which ensures that as much light as possible conducted by the receiving end lens 5 can be transmitted to the receiving element 2, even in the case of light deflection, which can improve the receiving efficiency.

[0036] It should be noted that, in the present document, relational terms such as one and the other and at least one of A and B and / or the like can be used to include a combination of at least one of the associated items, related by the conjunction, for example, a combination of at least one of A and at least one of B. It is further noted that the terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statement "includes one of A and / or B" does not foreclose the existence of both A and B at the same time.

[0037] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A novel rain sensor, comprising a transmitting end lens (4) and a receiving end lens (5) arranged on the inner side of a glass, characterized in that: The transmitting end lens (4) and the receiving end lens (5) respectively have a transmitting source (1) and a receiving element (2) on the side facing away from the glass; The emission end of the emission source (1) faces the emission end lens (4); The receiving end of the receiving element (2) faces the receiving end lens (5); An extended connection end (8) is integrally formed on the side of the receiving end lens (5) facing away from the glass. The end of the extended connection end (8) away from the receiving end lens (5) is arranged together with the receiving end of the receiving element (2), so that all light that is totally reflected back to the receiving end lens (5) will partially reach the receiving element (2). The transmitting end lens (4) and the receiving end lens (5) are bonded to the inner side of the glass via a silicone adhesive layer (3).

2. A novel rain sensor according to claim 1, characterized in that: The end of the extended connection end portion (8) away from the receiving end lens (5) is bonded to the receiving end of the receiving element (2) through silicone.

3. A novel rain sensor according to claim 2, characterized in that: A first total reflection mirror (6) and a second total reflection mirror (7) are provided on the side of the transmitting end lens (4) facing away from the receiving end lens (5).

4. A novel rain sensor according to claim 3, characterized in that: The first total reflection mirror (6) and the second total reflection mirror (7) are in an arc-shaped structure, and the radius of the first total reflection mirror (6) is smaller than the radius of the second total reflection mirror (7).

5. A novel rain sensor according to claim 4, characterized in that: A clamping plate (9) is fixed to the back of each of the transmitting source (1) and the receiving element (2), and a mounting support (10) is clamped inside each of the clamping plates (9), and the mounting support (10) is fixed to a desired fixed object.

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