Water mist detection sensor and demisting device

Abstract

The utility model 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 utility model, the light rays emitted by the light emitting part irradiate the transparent object to be detected through the path, and 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 generate relatively large induction current; 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] The application belongs to the technical field of sensors, and particularly relates to a water mist detection sensor and a defogging device. BACKGROUND

[0002] In the use of existing transparent glass, the glass is often covered with water mist due to temperature difference and other reasons. At present, when the glass is covered with water mist, it is observed by human eyes, and it is difficult to realize automatic detection. For example, during the driving of a vehicle in winter, the vehicle window is often covered with water mist due to a large temperature difference between the inside and outside, which seriously affects the driving vision. The driver starts the hot air system only after finding that the road cannot be seen clearly, and the operation is not convenient. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving at least one of the technical problems existing in the prior art or related art.

[0004] In order to solve the above problems, the first aspect of the application provides a water mist detection sensor, which comprises:

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

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

[0007] The utility model also comprises a light emitting element and a light receiving element, which are symmetrically arranged in the first shell. The light emitted by the light emitting element is irradiated on the transparent object to be detected through the first lens and the transparent transmission layer. The light reflected by the transparent object to be detected is input to the light receiving element through the transparent transmission layer and the second lens. The light receiving element generates a corresponding induced current according to the intensity of the received light.

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

[0009] Optionally, the utility model further comprises a PCB board, which is clamped in the first shell. The light emitting element and the light receiving element are symmetrically arranged on both sides of the PCB board.

[0010] Optionally, the utility model further comprises a second shell, which is arranged outside the first shell. An elastic element is arranged between the PCB board and the second shell. An opening is formed on the second shell. In the natural state of the elastic element, part of the first shell is located outside the opening.

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

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

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

[0014] Optionally, the controller is arranged on the second housing, and the controller is electrically connected with the light emitting element and the light receiving element.

[0015] Optionally, the indicator lamp is arranged on the second housing.

[0016] The second aspect of the application provides a defogging device, comprising a defogger;

[0017] 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 with the water mist detection sensor.

[0018] Advantages

[0019] The water mist detection sensor and the defogging device provided in the embodiment of the utility model, the light emitted by the light emitting element is irradiated to 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 element will receive relatively strong reflected light, and relatively large induced current is generated; if water mist appears on the other side of the transparent object to be detected, the light will be scattered and refracted in the water mist layer, so that the light intensity reflected to the light receiving element is greatly weakened, and the induced current is also significantly reduced, so that whether the transparent object to be detected has water mist formed can be accurately judged, and the detection accuracy and convenience are improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure diagram of the water mist detection sensor of the utility model;

[0021] Figure 2 It is a structure diagram of the defogger of the utility model.

[0022] The signs are represented as:

[0023] 1, first housing; 2, first lens; 3, second lens; 4, transparent transmission layer; 5, light emitting element; 6, light receiving element; 7, PCB board; 8, second housing; 9, elastic element; 10, defogger. DETAILED DESCRIPTION

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The preferred embodiments of the present application are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0028] For reference Figure 1 As shown in the drawings, according to the first aspect of the embodiments of the present application, a water mist detection sensor is provided, comprising:

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

[0030] A transparent transmission layer 4 is arranged in the detection port and located on the first lens 2 and the second lens 3.

[0031] The light emitting part 5 and the light receiving part 6 are symmetrically arranged in the first shell 1, the light emitted by the light emitting part 5 is irradiated on the transparent object to be detected through the first lens 2 and the transparent transmission layer 4, the light reflected by the transparent object to be detected is given to the light receiving part 6 through the transparent transmission layer 4 and the second lens 3, and the light receiving part 6 generates a corresponding induced current according to the intensity of the received light.

[0032] Specifically, when the water mist condition of the surface of the transparent object to be detected needs to be detected, the first shell 1 is installed on one side of the transparent object to be detected, the light emitted by the light emitting part 5 is irradiated on the transparent object to be detected through the first lens 2 and the transparent transmission layer 4, in the case that 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, and the reflected light is given to the light receiving part 6 through the transparent transmission layer 4 and the second lens 3, at this time, the light receiving part 6 will generate a larger induced photocurrent, and the induced photocurrent corresponds to the intensity of the light. The light emitted by the light emitting part 5 is irradiated on the transparent object to be detected through the first lens 2 and the transparent transmission layer 4, in the case that there is water mist on the other side of the transparent object to be detected, part or all of the light will enter the air through the water mist, and the other part of the light will be reflected by the transparent object to be detected and given to the light receiving part 6 through the transparent transmission layer 4 and the second lens 3, at this time, the light receiving part 6 will not generate or generate a very small induced photocurrent, therefore, whether there is water mist on the other side of the transparent object to be detected can be automatically judged by the size of the induced current generated by the light receiving part 6, the detection is convenient and fast, and the accuracy is high.

[0033] The first lens 2 and the second lens 3 are symmetrically fixed and installed on the detection port, and the transparent transmission layer 4 is installed above the first lens 2 and the second lens 3, in use, the transparent transmission layer 4 will directly contact the transparent object to be detected, and to a certain extent, the first lens 2 and the second lens 3 are protected from the erosion of external environmental factors, such as dust and water vapor.

[0034] The light emitting part 5 and the light receiving part 6 are symmetrically distributed in the first shell 1, and are respectively located on the two sides below the first lens 2 and the second lens 3, the light emitting part 5 emits light which irradiates on the surface of the transparent object to be detected through the first lens 2 and the transparent transmission layer 4. If the other side of the transparent object to be detected is dry and free of water mist, the light will be reflected from the surface of the transparent object to be detected and given to the light receiving part 6 through the transparent transmission layer 4 and the second lens 3. The light receiving part 6 has sensitive light sensing capability and can generate an induced current of a corresponding size according to the difference in the intensity of the received light.

[0035] The device can be applied to bathroom glass, automobile glass, organic glass and transparent PC, etc.

[0036] The light emitted by the light emitting part 5 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 part 6 will receive stronger reflected light, generating a relatively larger induced current; if water mist appears 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 part 6, and the induced current also decreases significantly. In this way, it can be accurately judged whether water mist is formed on the surface of the transparent object to be detected, and the accuracy and convenience of detection are improved.

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

[0038] Specifically, the first lens 2 and the second lens 3 are both designed in a lens prism structure, which combines the conventional optical effects of lenses on light, such as convergence and divergence, and the refraction and deflection characteristics of prisms. When the light is emitted from the light emitting part 5, it first contacts the lens part. The curved surface design of the lens will preliminarily converge the divergent light according to the established optical principles, making its propagation direction more concentrated. Then the light enters the prism part, which will cause the light to be deflected at a specific angle, ensuring that the light can pass through the transparent transmission layer 4 at an accurate and stable angle, and finally be irradiated on 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 guide 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 passes through the transparent transmission layer 4 and reaches the prism part of the second lens 3. The prism will accurately guide the reflected light to the lens part according to its pre-designed angle. The lens part is responsible for re-converging the light that may have been diverged due to reflection, so that it can be highly concentrated into the light receiving part 6.

[0039] It also includes a PCB board 7, which is clamped in the first shell 1, and the light emitting part 5 and the light receiving part 6 are symmetrically arranged on both sides of the PCB board 7.

[0040] Specifically, the PCB board 7 is tightly and stably installed in the first shell 1 through a clamping structure. During the installation process, the PCB board 7 is only needed to be aligned with the preset clamping groove in the first shell 1, and then pressed gently to realize quick installation. The light emitting part 5 and the light receiving part 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 elements. The light emitting part 5 is connected with the driving circuit on the PCB board 7. When receiving a working instruction, the driving circuit provides stable and appropriate current for the light emitting part 5, so that the light emitting part 5 can emit light according to the set power and frequency. At the same time, the light receiving part 6 is connected with the signal amplification and processing circuit. When the light receiving part 6 receives the light reflected from the transparent object to be detected and generates an induced current, the current signal is immediately 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, so as to accurately judge the water mist condition on the surface of the transparent object to be detected.

[0041] The second shell 8 is further included, which is arranged outside the first shell 1. An elastic part 9 is arranged between the PCB board 7 and the second shell 8. An opening is formed in the second shell 8. In the natural state of the elastic part 9, part of the first shell 1 is located outside the opening.

[0042] Specifically, the second shell 8 is installed outside the first shell 1, which can protect the first shell 1 and the internal components from the outside. When in use, the opening of the second shell 8 is attached to one side of the transparent object to be detected by adhesive, which improves the fixing performance after installation. The elastic part 9 is installed between the PCB board 7 and the bottom of the second shell 8. In the natural state of the elastic part 9, the first shell 1 protrudes out of the opening of the second shell 8. Therefore, when the opening of the second shell 8 is installed on the transparent object to be detected, the detection port of the first shell 1 will compress the elastic part 9 and contact the side of the transparent object to be detected, so that the contact is more tight.

[0043] The first shell 1 and the second shell 8 are both made of black opaque material, which can avoid the environmental light entering the inside of the first shell 1 and the inside of the second shell 8 when in use, so as to affect the detection result.

[0044] The light emitting part 5 is a LED light source, which is encapsulated in PIN type epoxy resin.

[0045] The light receiving part 6 is a photodiode, which is encapsulated in PIN type epoxy resin.

[0046] Specifically, the light emitting part 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 heating and prolongs the service life of the sensor. The light emitting part 5 is packaged in a PIN type epoxy resin, which provides good physical protection and electrical insulation performance. The 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 part 5. In humid, dusty or chemical environments, it can avoid damage and ensure stable light emission. At the same time, the PIN type epoxy resin also has good electrical insulation performance, which can prevent current leakage and ensure the electrical safety of the light emitting part 5, improving the stability and reliability of the sensor.

[0047] The light receiving part 6 is a photodiode that can quickly and accurately convert the received light signal into an electrical signal. When the light emitted by the light emitting part 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 allows the sensor to capture the small changes in the surface water mist of the transparent object to be detected in a timely manner, improving the accuracy and timeliness of the detection. The light receiving part 6 is packaged in a PIN type epoxy resin to provide reliable physical protection and electrical insulation for the photodiode. It can prevent mechanical impact, dust and moisture from the outside from damaging the photodiode and ensure its long-term stable operation.

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

[0049] Specifically, the transparent transmission layer 4 is made of transparent silicone, which has excellent optical performance. In the process of light propagation, the transparent silicone with high light transmittance can ensure that the light emitted by the light emitting part 5 has very little light energy loss when passing through the transparent transmission layer 4. The transparent silicone has good flexibility and elasticity, which allows the transparent transmission layer 4 to closely fit the surface of the transparent object to be detected of different shapes.

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

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

[0052] Specifically, in actual application scenarios, the controller cooperates with the indicator light, taking the detection of glass water mist as an example. The controller can process data from multiple sensors in real time due to its strong computing power. When the internal and external environment of the building changes, such as a sudden increase in humidity or a sudden drop in temperature, which may cause water mist to appear on the surface of the glass, the controller can quickly analyze the sensing current signal from the light receiving element 6. If it is determined that water mist has formed on the surface of the glass in a certain area, the corresponding indicator light in that area will switch to a red flashing state, alerting relevant personnel and sending information such as the location of the water mist to the central control system of the building, so as to start the corresponding demisting equipment, such as turning on the heating wire or ventilation system of the glass, to quickly eliminate the water mist.

[0053] With reference to the accompanying drawings Figures 1-2 The utility model provides a demisting device, including demister 10;

[0054] The demister 10 is arranged on the other side of the transparent object to be detected, and the demister 10 is electrically connected with the water mist detection sensor.

[0055] In this embodiment, a demisting device including the water mist detection sensor of any of the above embodiments is provided, so that the demisting device has the advantages of the water mist detection sensor of any of the above embodiments and can achieve the technical effects of the water mist detection sensor of any of the above embodiments. To avoid repetition, this will not be repeated here. When the water mist detection sensor detects water mist on the other side of the transparent object to be detected, a signal can be transmitted to the demister 10, which starts to dry and remove the water mist on the side of the transparent object to be detected.

[0056] The above is only a preferred embodiment of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, which should be considered as the protection scope of the present application.

Claims

1. A water mist detection sensor, characterized in that The utility model relates to a water mist detection sensor, including: First shell (1), first shell (1) is located in transparent thing to be detected one side, first shell (1) is opened to the side of the transparent thing to be detected and is equipped with detection port, and first lens (2) and second lens (3) are symmetrically arranged in the detection port; Transparent transmission layer (4), transparent transmission layer (4) is arranged in the detection port and is located on the first lens (2) and second lens (3); It further includes light emitting element (5) and light receiving element (6), light emitting element (5) and light receiving element (6) are symmetrically arranged in the first shell (1), the light of light emitting element (5) is irradiated on the transparent thing to be detected through the first lens (2) and the transparent transmission layer (4), and the light reflected by the transparent thing to be detected is given to light receiving element (6) through the transparent transmission layer (4) and the second lens (3), and light receiving element (6) generates corresponding induced current according to the intensity of received light.

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

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

4. The water mist detection sensor of claim 3, wherein, It further includes second shell (8), second shell (8) is arranged on the outside of the first shell (1), and elastic element (9) is arranged between the PCB board (7) and the second shell (8), and the opening is formed in the second shell (8), and the first shell (1) is partially located outside the opening in the natural state of the elastic element (9).

5. The water mist detection sensor of claim 1, wherein, The light emitting element (5) is an LED light source, and the light emitting element (5) is packaged in PIN type epoxy resin.

6. The water mist detection sensor of claim 1, wherein, The light receiving element (6) is a photodiode, and the light receiving element (6) is packaged in PIN type epoxy resin.

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

8. The water mist detection sensor of claim 4, wherein, It further includes a controller, and the controller is arranged on the second shell (8) and electrically connected with the light emitting element (5) and the light receiving element (6).

9. The water mist detection sensor of claim 4, wherein, It further includes an indicator light, and the indicator light is arranged on the second shell (8).

10. A defogging device characterized by comprising: It further includes a demister (10). The water mist detection sensor according to any one of claims 1-9, the demister (10) is arranged on the other side of the transparent thing to be detected, and the demister (10) is electrically connected with the water mist detection sensor.

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