Water mist detection sensor and demisting device

Abstract

The invention provides a water mist detection sensor and a demisting device, the water mist detection sensor comprises a first shell, the first shell is arranged on one side of a transparent to-be-detected object, a detection port is formed in one side, facing the transparent to-be-detected object, of the first shell, and a first lens and a second lens are symmetrically arranged in the detection port; the transparent transmission layer is arranged in the detection opening and is positioned on the first lens and the second lens; according to the invention, the light rays emitted by the light emitting part irradiate the transparent object to be detected through the path, if the other side of the transparent object to be detected has no water mist, the light receiving part can receive stronger reflected light rays, and a relatively large induction current is generated; if water mist appears on the other side of the transparent object to be detected, the light rays can be scattered and refracted on the water mist layer, so that the intensity of the light rays reflected to the light receiving part is greatly weakened, the induction current is also remarkably reduced, whether the water mist is formed on the transparent object to be detected or not can be accurately judged, and the detection accuracy and convenience are improved.

Description

Technical Field

[0001] This application belongs to the technical field of sensors, and particularly relates to a water mist detection sensor and a defogging device. Background Art

[0002] During the use of existing transparent glass, due to reasons such as temperature difference, the glass is often covered with water mist. Currently, when the glass is covered with water mist, it is all observed by the human eye, and it is difficult to achieve automatic detection. For example, during winter driving, due to the large temperature difference between the inside and outside, the car window is often covered with water mist, seriously affecting the driving vision. It is all that the driver starts the hot air system after finding that the road cannot be seen clearly, and the operation is not convenient. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To solve the above problems, the first aspect of this application provides a water mist detection sensor, including:

[0005] A first housing, which is arranged on one side of the transparent object to be detected, and a detection port is opened on the side of the first housing facing the transparent object to be detected, and a first lens and a second lens are symmetrically arranged in the detection port;

[0006] A transparent transmission layer, which is arranged in the detection port and located on the first lens and the second lens;

[0007] It further includes a light emitting element and a light receiving element, which are symmetrically arranged in the first housing. The light emitted by the light emitting element passes through the first lens and the transparent transmission layer and irradiates on the transparent object to be detected. The light reflected by the transparent object to be detected passes through the transparent transmission layer and the second lens and enters the light receiving element. The light receiving element generates a corresponding induced current according to the intensity of the received light.

[0008] Optionally, both the first lens and the second lens are lens prisms.

[0009] Optionally, it further includes a PCB board, which is snap-connected in the first housing, and the light emitting element and the light receiving element are symmetrically arranged on both sides of the PCB board.

[0010] Optionally, it further includes a second housing, which is arranged outside the first housing. An elastic member is arranged between the PCB board and the second housing. An opening is opened on the second housing. In the natural state of the elastic member, a part of the first housing is located outside the opening.

[0011] Optionally, the light emitting element is an LED light source, and the light emitting element is encapsulated in PIN-type epoxy resin.

[0012] Optionally, the light-receiving component is a photodiode, and the light-receiving component is encapsulated in a PIN-type epoxy resin.

[0013] Optionally, the transparent transmission layer is made of transparent silica gel.

[0014] Optionally, it further includes a controller, the controller is arranged on the second housing, and the controller is electrically connected to the light-emitting component and the light-receiving component.

[0015] Optionally, it further includes an indicator light, and the indicator light is arranged on the second housing.

[0016] A second aspect of the present application provides a defogging device, including a defogger;

[0017] Such as the water mist detection sensor of the first aspect, the defogger is arranged on the other side of the transparent object to be detected, and the defogger is electrically connected to the water mist detection sensor.

[0018] Beneficial effects

[0019] In the embodiments of the present invention, in the provided water mist detection sensor and defogging device, the light emitted by the light-emitting component is irradiated onto the transparent object to be detected through the above path. If there is no water mist on the other side of the transparent object to be detected, the light-receiving component will receive relatively strong reflected light and generate a relatively large induced current; if there is water mist on the other side of the transparent object to be detected, the light will be scattered and refracted in the water mist layer, resulting in a significant reduction in the intensity of the light reflected to the light-receiving component, and the induced current will also decrease significantly. It can accurately judge whether water mist is formed on the transparent object to be detected, improving the accuracy and convenience of detection. Description of the drawings

[0020] Figure 1 It is the structural diagram of the water mist detection sensor of the present invention;

[0021] Figure 2 It is the structural diagram of the defogger of the present invention.

[0022] The reference numerals are shown as:

[0023] 1. First housing; 2. First lens; 3. Second lens; 4. Transparent transmission layer; 5. Light-emitting component; 6. Light-receiving component; 7. PCB board; 8. Second housing; 9. Elastic component; 10. Defogger. Detailed implementation manners

[0024] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0026] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not used to limit the present invention.

[0028] See in conjunction with Figure 1 As shown, according to the first aspect of the embodiments of the present application, a water mist detection sensor is provided, including:

[0029] A first housing 1, the first housing 1 is disposed on one side of the transparent object to be detected, and a detection port is opened on the side of the first housing 1 facing the transparent object to be detected. A first lens 2 and a second lens 3 are symmetrically disposed in the detection port;

[0030] A transparent transmission layer 4, the transparent transmission layer 4 is disposed in the detection port and on the first lens 2 and the second lens 3;

[0031] It further includes a light-emitting component 5 and a light-receiving component 6. The light-emitting component 5 and the light-receiving component 6 are symmetrically arranged in the first housing 1. The light emitted by the light-emitting component 5 passes through the first lens 2 and the transparent transmission layer 4 and irradiates on the transparent object to be detected. The light reflected by the transparent object to be detected passes through the transparent transmission layer 4 and the second lens 3 and is incident on the light-receiving component 6. The light-receiving component 6 generates a corresponding induced current according to the intensity of the received light.

[0032] Specifically, when it is necessary to detect the water mist condition on the surface of the transparent object to be detected, the first housing 1 can be installed on one side of the transparent object to be detected. The light emitted by the light-emitting component 5 passes through the first lens 2 and the transparent transmission layer 4 and irradiates on the transparent object to be detected. When there is no water mist on the other side of the transparent object to be detected, the transparent object to be detected will reflect the light. The reflected light passes through the transparent transmission layer 4 and the second lens 3 and is incident on the light-receiving component 6. At this time, the light-receiving component 6 will generate a relatively large induced photocurrent, and the generated induced current corresponds to the light intensity. The light emitted by the light-emitting component 5 passes through the first lens 2 and the transparent transmission layer 4 and irradiates on the transparent object to be detected. When there is water mist on the other side of the transparent object to be detected, part or all of the light will pass through the water mist and enter the air, and the other part of the light will be reflected by the transparent object to be detected, pass through the transparent transmission layer 4 and the second lens 3 and be incident on the light-receiving component 6. At this time, the light-receiving component 6 will not generate or generate a very small induced photocurrent. Therefore, it is possible to automatically judge whether there is water mist on the other side of the transparent object to be detected according to the magnitude of the induced current generated by the light-receiving component 6. The detection is convenient, fast and highly accurate.

[0033] Wherein, the first lens 2 and the second lens 3 are symmetrically and fixedly installed on the detection port, and the transparent transmission layer 4 is installed above the first lens 2 and the second lens 3. During use, the transparent transmission layer 4 will directly contact the transparent object to be detected, protecting the first lens 2 and the second lens 3 from being eroded by external environmental factors to a certain extent, such as dust and water vapor contamination.

[0034] Wherein, the light-emitting component 5 and the light-receiving component 6 are symmetrically distributed inside the first housing 1, respectively located on both sides below the first lens 2 and the second lens 3. The light emitted by the light-emitting component 5 passes through the first lens 2, passes through the transparent transmission layer 4 and irradiates on the surface of the transparent object to be detected. If the other side of the transparent object to be detected is dry and free of water mist, the light will be reflected back from the surface of the transparent object to be detected and given to the light-receiving component 6 through the transparent transmission layer 4 and the second lens 3. The light-receiving component 6 has a sensitive light-sensing ability and can generate an induced current of corresponding magnitude according to the different intensities of the received light.

[0035] Wherein, this device can be applied to bathroom glass, automotive glass, plexiglass, transparent PC, etc.

[0036] In this embodiment, the light emitted by the light-emitting component 5 irradiates the transparent object to be detected through the above path. If there is no water mist on the other side of the transparent object to be detected, the light-receiving component 6 will receive relatively strong reflected light and generate a relatively large induced current. If there is water mist on the other side of the transparent object to be detected, the light will be scattered and refracted in the water mist layer, resulting in a significant decrease in the intensity of the light reflected to the light-receiving component 6, and the induced current will also decrease significantly. In this way, it is possible to accurately determine whether there is water mist formed on the surface of the transparent object to be detected, improving the accuracy and convenience of detection.

[0037] Both the first lens 2 and the second lens 3 are lens prisms.

[0038] Specifically, both the first lens 2 and the second lens 3 are designed with a lens prism structure. The lens prism combines the conventional optical functions of a lens such as converging and diverging light, as well as the refraction and deflection characteristics of a prism for light. When light is emitted from the light-emitting component 5, it first contacts the lens part. The curved surface design of the lens will preliminarily converge the diverging light according to established optical principles, making its propagation direction more concentrated. Then the light enters the prism part, which will deflect the light at a specific angle to ensure that the light can pass through the transparent transmission layer 4 at an accurate and stable angle, and finally irradiate the surface of the transparent object to be detected at a suitable incident angle. For example, the lens prism structure of the first lens 2 can accurately direct the light to the transparent object to be detected at an angle of about 45°. When the light is reflected back from the surface of the transparent object to be detected, it reaches the prism part of the second lens 3 through the transparent transmission layer 4. The prism will accurately direct the reflected light to the lens part according to its pre-designed angle. The lens part is responsible for converging the light again, refocusing the light that may be diverged due to reflection, so that it can enter the light-receiving component 6 highly concentrated.

[0039] It further includes a PCB board 7, which is snap-fitted into the first housing 1, and the light-emitting component 5 and the light-receiving component 6 are symmetrically arranged on both sides of the PCB board 7.

[0040] Specifically, the PCB board 7 is tightly and stably installed inside the first housing 1 through a clamping structure. During the installation process, simply align the PCB board 7 with the preset card slot inside the first housing 1 and gently press it to achieve quick installation. The light-emitting component 5 and the light-receiving component 6 are symmetrically arranged on both sides of the PCB board 7. The PCB board 7 integrates fine circuit traces, which are responsible for accurately transmitting power signals, control signals, and detection signals between various components. The light-emitting component 5 is connected to the drive circuit on the PCB board 7. When receiving a working instruction, the drive circuit will provide a stable and appropriate current for the light-emitting component 5, enabling it to emit light according to the set power and frequency. At the same time, the light-receiving component 6 is connected to the signal amplification and processing circuit. When the light-receiving component 6 receives the light reflected from the transparent object to be detected and generates an induced current, this current signal will immediately be transmitted to the signal amplification circuit through the circuit traces on the PCB board 7. The signal amplification circuit amplifies the weak induced current and then transmits the amplified signal to the subsequent signal processing module to accurately judge the water mist condition on the surface of the transparent object to be detected.

[0041] It further includes a second housing 8. The second housing 8 is arranged outside the first housing 1. An elastic member 9 is provided between the PCB board 7 and the second housing 8. An opening is provided on the second housing 8. In the natural state of the elastic member 9, a part of the first housing 1 is located outside the opening.

[0042] Specifically, the second housing 8 is installed outside the first housing 1, which can protect the first housing 1 and its internal components from the outside. During use, the opening of the second housing 8 is installed on one side of the transparent object to be detected through gluing to improve its fixing performance after installation. The elastic member 9 is installed between the bottom of the PCB board 7 and the second housing 8. In the natural state of the elastic member 9, the first housing 1 protrudes from the opening of the second housing 8. Therefore, when the opening of the second housing 8 is installed on the transparent object to be detected, the detection port of the first housing 1 will compress the elastic member 9 to contact the side of the transparent object to be detected, making the contact closer.

[0043] Among them, both the first housing 1 and the second housing 8 are made of black light-tight materials to prevent ambient light from entering the inside of the first housing 1 and the second housing 8 during use, which may affect the detection results.

[0044] The light-emitting component 5 is an LED light source, and the light-emitting component 5 is encapsulated in PIN-type epoxy resin.

[0045] The light-receiving component 6 is a photodiode, and the light-receiving component 6 is encapsulated in PIN-type epoxy resin.

[0046] Specifically, the light-emitting component 5 is an LED light source. Compared with traditional light sources, the LED light source can emit more light under the same power consumption, which not only reduces the overall power consumption of the sensor, but also reduces the energy loss caused by heat generation and extends the service life of the sensor. Encapsulating the light-emitting component 5 in PIN-type epoxy resin provides it with good physical protection and electrical insulation properties. PIN-type epoxy resin has high strength and good chemical corrosion resistance, which can effectively resist the erosion of external environmental factors on the light-emitting component 5. In a humid, dusty or chemical environment, it can be protected from damage and ensure its stable light emission. At the same time, PIN-type epoxy resin also has good electrical insulation properties, which can prevent current leakage, ensure the electrical safety of the light-emitting component 5, and improve the stability and reliability of the sensor.

[0047] The light-receiving component 6 is a photodiode, which can quickly and accurately convert the received optical signal into an electrical signal. When the light emitted by the light-emitting component 5 is reflected by the transparent object to be detected and received by the photodiode, the photodiode can quickly generate a corresponding induced current according to the change in light intensity. This high-sensitivity and fast-response characteristic enables the sensor to timely capture the minute changes in the water mist on the surface of the transparent object to be detected, improving the detection accuracy and timeliness. Encapsulating the light-receiving component 6 in PIN-type epoxy resin provides reliable physical protection and electrical insulation for the photodiode. It can prevent damage to the photodiode caused by external mechanical shocks, dust and moisture, ensuring its long-term stable operation.

[0048] The transparent transmission layer 4 is made of transparent silica gel.

[0049] Specifically, the transparent transmission layer 4 is made of transparent silica gel. Transparent silica gel has excellent optical properties. During the light propagation process, the transparent silica gel with high light transmittance can ensure that the light energy loss is extremely small when the light emitted by the light-emitting component 5 passes through the transparent transmission layer 4. Transparent silica gel has good flexibility and elasticity. This enables the transparent transmission layer 4 to closely fit the surface of different-shaped transparent objects to be detected.

[0050] It also includes a controller, which is arranged on the second housing 8 and is electrically connected to the light-emitting component 5 and the light-receiving component 6.

[0051] It also includes an indicator light, which is arranged on the second housing 8.

[0052] Specifically, in an actual application scenario, the controller and the indicator light work together. Taking the detection of glass water mist as an example, with its powerful computing ability, the controller can process data from multiple sensors in real time. When the internal and external environment of the building changes, such as a sudden increase in humidity or a sharp drop in temperature, which may cause water mist to appear on the glass surface, the controller will quickly analyze the induced current signal transmitted by the light-receiving component 6. If it is determined that water mist has formed on the glass surface in a certain area, it will trigger the corresponding indicator light in that area to switch to a red flashing state, sending an alarm to relevant staff members. At the same time, it will send information such as the position of the water mist to the central control system of the building, so as to activate corresponding defogging devices, such as turning on the heating wire or ventilation system of the glass, to quickly eliminate the water mist.

[0053] Refer to the attached Figure 1-2 As shown, the second aspect of the present invention provides a defogging device, including a defogger 10;

[0054] A water mist detection sensor as in any of the above embodiments, the defogger 10 is disposed on the other side of the transparent object to be detected, and the defogger 10 is electrically connected to the water mist detection sensor.

[0055] In this embodiment, a defogging device including the water mist detection sensor in any of the above embodiments is proposed. Therefore, the defogging device has the advantages of the water mist detection sensor in any of the above embodiments and can achieve the technical effects that the water mist detection sensor in any of the above embodiments can achieve. To avoid repetition, it will not be elaborated here. When the water mist detection sensor detects that there is water mist on the other side of the transparent object to be detected, it can transmit a signal to the defogger 10. At this time, the defogger 10 is activated to dry and defog the side of the transparent object to be detected with water mist.

[0056] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and variations can be made, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A water mist detection sensor, characterized in that, Comprising: A first housing (1), the first housing (1) is arranged on one side of the transparent object to be detected, a detection opening is provided on the side of the first housing (1) facing the transparent object to be detected, and a first lens (2) and a second lens (3) are symmetrically arranged in the detection opening; A transparent transmission layer (4), the transparent transmission layer (4) is arranged in the detection opening and located on the first lens (2) and the second lens (3); It further includes a light emitting element (5) and a light receiving element (6), the light emitting element (5) and the light receiving element (6) are symmetrically arranged in the first housing (1), the light emitted by the light emitting element (5) passes through the first lens (2) and the transparent transmission layer (4) and irradiates on the transparent object to be detected, the light reflected by the transparent object to be detected passes through the transparent transmission layer (4) and the second lens (3) and enters the light receiving element (6), and the light receiving element (6) generates a corresponding induced current according to the intensity of the received light.

2. The water mist detection sensor according to claim 1, wherein Both the first lens (2) and the second lens (3) are lens prisms.

3. The water mist detection sensor according to claim 2, wherein It further includes a PCB board (7), the PCB board (7) is snap-connected in the first housing (1), and the light emitting element (5) and the light receiving element (6) are symmetrically arranged on both sides of the PCB board (7).

4. The water mist detection sensor according to claim 3, characterized in that, It further includes a second housing (8), the second housing (8) is arranged outside the first housing (1), an elastic member (9) is arranged between the PCB board (7) and the second housing (8), an opening is provided on the second housing (8), and in the natural state of the elastic member (9), a part of the first housing (1) is located outside the opening.

5. The water mist detection sensor according to claim 1, characterized in that, The light emitting element (5) is an LED light source, and the light emitting element (5) is encapsulated in PIN-type epoxy resin.

6. The water mist detection sensor according to claim 1, characterized in that, The light receiving element (6) is a photodiode, and the light receiving element (6) is encapsulated in PIN-type epoxy resin.

7. The water mist detection sensor according to claim 1, wherein The transparent transmission layer (4) is made of transparent silica gel.

8. The water mist detection sensor according to claim 1, wherein, It further includes a controller, the controller is arranged on the second housing (8), and the controller is electrically connected to the light emitting element (5) and the light receiving element (6).

9. The water mist detection sensor according to claim 1, wherein, It further includes an indicator light, and the indicator light is arranged on the second housing (8).

10. A demisting device, characterized in that, Including a defogger (10); For the water mist detection sensor according to any one of claims 1-9, the defogger (10) is arranged on the other side of the transparent object to be detected, and the defogger (10) is electrically connected to the water mist detection sensor.

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