Fog detection device

Abstract

The utility model provides a fog detection device. The mist detection device comprises a shell, a dew collecting cover, a refrigeration part, a main control board, a light source and a detector, the dew collecting cover is arranged at the top of the shell, an opening of the dew collecting cover faces the outside of the shell, the refrigeration part is arranged at the bottom of the dew collecting cover, and one end of the dew collecting cover is provided with a window and a transparent cover plate covering the window; the light source and the detector are arranged below the window, and the transmitting end of the light source faces the window. The main control board is electrically connected with the light source, the detector and the refrigeration part. Wherein the refrigerating part cools dew collected by the dew collecting cover, the dew collecting cover gathers the cooled dew to the transparent cover plate to form water drops, a transmitting end of the light source emits light beams, the light beams penetrate through the transparent cover plate, irradiate the water drops and are scattered, and the detector receives scattered light signals and outputs corresponding electric signals to the main control board. The main control board determines whether fog exists in the current environment according to the electric signal. The fog detection device is high in stability and low in cost.

Description

Technical Field

[0001] The present application relates to the technical field of fog detection, and in particular to a fog detection device. Background Art

[0002] When the camera device encounters fog during use, it is necessary to switch the filter to turn on the fog-penetrating mode. Currently, the algorithm is used to determine whether there is an error, which is easy to cause misjudgment. The structure of the fog detection device in the related art is too complicated and the cost is high. At present, a stable and inexpensive fog detection device is needed to determine whether there is fog. Utility Model Content

[0003] The present application provides a fog detection device with high stability and low cost.

[0004] The present application provides a fog detection device, comprising: a shell and a dew collection cover arranged on the shell, a refrigeration component, a main control board, a light source and a detector, wherein the dew collection cover is arranged on the top of the shell and the opening of the dew collection cover is arranged toward the outside of the shell, the refrigeration component is arranged at the bottom of the dew collection cover, one end of the dew collection cover is provided with a window and a transparent cover plate covering the window, the light source and the detector are arranged below the window and the emission end of the light source is arranged toward the window, and the main control board is electrically connected to the light source, the detector and the refrigeration component respectively; wherein the refrigeration component cools down the dew collected by the dew collection cover, the dew collection cover gathers the cooled dew to the transparent cover plate to form water droplets, the emission end of the light source emits a light beam that passes through the transparent cover plate to irradiate the water droplets and scatters, the detector receives the scattered light signal and outputs a corresponding electrical signal to the main control board, and the main control board determines whether there is fog in the current environment according to the electrical signal.

[0005] Preferably, the dew collection cover includes a bottom groove and inclined surfaces on both sides of the bottom groove, the bottom groove is arranged at the connection of the inclined surfaces on both sides and is located on one side of the window, the inclined surfaces on both sides extend from bottom to top and from the edge of the bottom groove toward the side away from the bottom groove, and the inclined surfaces on both sides form the opening at one end relatively away from the bottom groove; wherein the height of the end of the bottom groove away from the window is greater than the height of the end of the bottom groove close to the window.

[0006] Preferably, the width of the bottom groove at one end away from the window is greater than the width of the bottom groove at one end close to the window, and the projection area of ​​the bottom groove onto the shell gradually decreases from the end away from the window to the end close to the window.

[0007] Preferably, the material of the inclined surface is metal; the inclined surface is provided with a plurality of side grooves, and the bottoms of the plurality of side grooves extend to the edge of the bottom groove.

[0008] Preferably, the material of the bottom trough is metal; the refrigeration component includes a cold end, and the cold end is arranged toward the bottom of the bottom trough.

[0009] Preferably, the fog detection device further comprises at least one fan, which is arranged on at least one of the inclined surface and the bottom groove.

[0010] Preferably, the detector is arranged directly below the window; the fog detection device also includes a condenser and a filter, the condenser is arranged at the front end of the detector, and the filter is arranged on the side of the condenser facing the window, the filter filters the scattered light signal, the condenser focuses the filtered light signal and transmits it to the detector, the detector receives the focused light signal and outputs a corresponding electrical signal to the main control board; wherein the wavelength of light passed by the filter matches the wavelength of the light beam emitted by the light source.

[0011] Preferably, the fog detection device further comprises a protective outer cover, which is arranged above the dew collecting cover, and the material of the side of the protective outer cover facing the dew collecting cover is black anodized aluminum.

[0012] Preferably, the mist detection device further comprises a temperature sensor, which is arranged outside the housing and electrically connected to the main control board, and the temperature sensor is used to obtain the temperature of the current environment and transmit a corresponding temperature electrical signal to the main control board.

[0013] Preferably, the shell is provided with an interface, the main control board is connected to the interface via a data line, and is electrically connected to an external camera device via the interface.

[0014] Preferably, the transparent cover plate is made of quartz glass.

[0015] Preferably, the light source includes an LED lamp or a laser.

[0016] The fog detection device provided by the embodiment of the present application is provided with a dew collecting cover, a refrigeration component, a main control board, a light source and a detector. The dew collecting cover is provided on the top of the shell and the opening of the dew collecting cover is provided outside the shell. The refrigeration component is provided at the bottom of the dew collecting cover. A window and a transparent cover plate covering the window are provided at one end of the dew collecting cover. The light source and the detector are provided below the window and the emission end of the light source is provided toward the window. The main control board is electrically connected to the light source, the detector and the refrigeration component respectively. The dew collected by the dew collecting cover is cooled by the refrigeration component, the cooled dew is gathered to the transparent cover plate to form water droplets by the dew collecting cover, a light beam is emitted by the emission end of the light source to pass through the transparent cover plate and illuminate the water droplets and scatter, the scattered light signal is received by the detector and a corresponding electrical signal is output to the main control board, and the main control board determines whether there is fog in the current environment according to the electrical signal. With such an arrangement, the fog detection device can be used to determine whether there is fog in the current environment, thereby determining the possibility of fogging of the camera devices arranged around the fog detection device, and providing a criterion for whether the camera devices arranged around need to switch the filters to turn on the fog-penetrating mode, with high stability and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 Shown is a schematic structural diagram of an embodiment of a fog detection device of the present application.

[0019] Figure 2 Shown Figure 1 A schematic top view of the structure of a dew collection cover of a fog detection device is shown.

[0020] Figure 3 Shown Figure 1 The functional block diagram of the fog detection device is shown.

[0021] Description of reference numerals:

[0022] Fog detection device 1, shell 11, interface 111, data line 112, dew collection cover 12, window 121, transparent cover plate 122, bottom groove 123, inclined surface 124, side groove 125, refrigeration component 13, main control board 14, light source 15, detector 16, condenser 17, filter 18, temperature sensor 19, water droplets 2, camera device 3. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0024] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0025] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0026] The embodiment of the present application provides a fog detection device. The fog detection device includes a shell and a dew collection cover arranged on the shell, a refrigeration component, a main control board, a light source and a detector, the dew collection cover is arranged on the top of the shell and the opening of the dew collection cover is arranged outside the shell, the refrigeration component is arranged at the bottom of the dew collection cover, one end of the dew collection cover is provided with a window and a transparent cover plate covering the window, the light source and the detector are arranged below the window and the emission end of the light source is arranged toward the window, and the main control board is electrically connected to the light source, the detector and the refrigeration component respectively; wherein the refrigeration component cools the dew collected by the dew collection cover, the dew collection cover gathers the cooled dew to the transparent cover plate to form water droplets, the emission end of the light source emits a light beam through the transparent cover plate to irradiate the water droplets and scatter, the detector receives the scattered light signal and outputs a corresponding electrical signal to the main control board, and the main control board determines whether there is fog in the current environment according to the electrical signal. With such an arrangement, the fog detection device can be used to determine whether there is fog in the current environment, thereby determining the possibility of fogging of the camera devices arranged around the fog detection device, and providing a criterion for whether the camera devices arranged around need to switch the filters to turn on the fog-penetrating mode, with high stability and low cost.

[0027] The fog detection device provided by the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other at will.

[0028] In some embodiments, the fog detection device is a device that uses a cold mirror dew point temperature measurement to determine the possibility of fogging, and is used together with the camera device. The fog detection device is arranged around the camera device. The fog detection device can detect whether there is fog in the current environment, that is, the fog detection device can detect whether there is fog in the current environment where the camera device arranged around is located, thereby providing a criterion for whether the camera device arranged around needs to switch the filter to turn on the fog penetration mode.

[0029] Figure 1 Shown is a schematic structural diagram of an embodiment of a fog detection device 1 of the present application. Figure 2 Shown Figure 1 The schematic diagram of the top structure of the dew collecting cover 12 of the fog detection device 1 is shown. Figure 3 Shown Figure 1 The principle block diagram of the fog detection device 1 is shown in FIG. Figures 1 to 3As shown, the fog detection device 1 includes a housing 11 and a dew collecting cover 12, a refrigeration component 13, a main control board 14, a light source 15 and a detector 16 arranged on the housing 11. The dew collecting cover 12 is arranged outside the housing 11 and can be used as an upper cover of the housing 11. The refrigeration component 13, the main control board 14, the light source 15 and the detector 16 are all arranged inside the housing 11. The dew collecting cover 12 is arranged on the top of the housing 11 and the opening of the dew collecting cover 12 is arranged outside the housing 11. The opening of the dew collecting cover 12 is exposed to facilitate the collection of dew. The refrigeration component 13 is arranged at the bottom of the dew collecting cover 12. It is convenient to cool the dew or reduce the temperature of the dew. A window 121 and a transparent cover plate 122 covering the window 121 are provided at one end of the dew collecting cover 12. The window 121 passes through the bottom of the dew collecting cover 12 from top to bottom. The light source 15 and the detector 16 are arranged below the window 121 and the emitting end of the light source 15 is arranged toward the window 121. The main control board 14 is electrically connected to the light source 15, the detector 16 and the refrigeration component 13 respectively. The dew collecting cover 12 is used to collect dew. The refrigeration component 13 cools the dew collected by the dew collecting cover 12. The dew collecting cover 12 gathers the cooled dew to the transparent cover plate 122 to form water droplets 2. The emitting end of the light source 15 emits a light beam that passes through the transparent cover plate 122 and irradiates the water droplets 2 and scatters. The detector 16 receives the scattered light signal and outputs a corresponding electrical signal to the main control board 14. The main control board 14 determines whether there is fog in the current environment based on the electrical signal.

[0030] In this embodiment, the housing 11 is provided with an interface 111, and the main control board 14 is connected to the interface 111 through a data line 112, and is electrically connected to the external camera device 3 through the interface 111. By providing the interface 111 on the housing 11, it is convenient for the main control board 14 to connect to the external camera device 3, and the structure is simple and the cost is low. In this embodiment, the main control board 14 is also electrically connected to the refrigeration element 13, the light source 15 and the detector 16 through the data line 112. The refrigeration element 13 can be a TEC. The refrigeration element 13 includes a cold end and a hot end. The TEC is fixed to the bottom of the dew collection cover 12, and the cold end of the TEC is arranged toward the dew collection cover 12, and thermal conductive silicone grease is applied between the two and mechanically fastened. The cold end of the refrigeration element 13 is arranged at the bottom of the dew collection cover 12 for cooling the dew collected by the dew collection cover 12. Some components of the fog detection device 1 are encapsulated in the housing 11, and the dew collection cover 12 is exposed outside the housing 11. A window 121 is installed at one end of the dew collecting cover 12. The light source 15 is electrically connected to the main control board 14. When the dew in the dew collecting cover 12 is cooled by the refrigeration element 13 and is gathered to the window 121 or passes through the window 121, the light beam emitted by the light source 15 is directed to the window 121 and passes through the transparent cover 122 to irradiate the surface of the water droplets 2 to be scattered. The scattered light signal passes through the transparent cover 122 and is gathered on the detector 16. The signal of the detector 16 electrically connected to the main control board 14 is processed by the main control board 14 and transmitted to the external camera device 3 through the interface 111 on the housing 11. The fog detection device 1 of this embodiment can calculate the size and number of water droplets 2 through the Mie scattering principle, so as to judge the possibility of fogging and whether it is raining. In this way, it is judged whether there is fog in the current environment where the fog detection device 1 is located, and thus the possibility of fogging of the camera device 3 arranged around the fog detection device 1 is judged, and a criterion is provided for whether the camera device 3 arranged around needs to switch the filter to turn on the fog penetration mode, which has high stability and low cost.

[0031] exist Figure 1 In the embodiment shown, the transparent cover plate 122 may be a transparent medium panel. The material of the transparent cover plate 122 is quartz glass. The quartz glass is embedded in the window 121. The quartz glass has good optical transparency, low light loss, stable performance and low cost. Figure 1 In the illustrated embodiment, the light source 15 includes an LED lamp or a laser. The light source is incident obliquely on the window 121 of the quartz glass, and the light beam penetrates the window 121 and is emitted to the outside through the center of the window 121. In this embodiment, the light source 15 includes a laser. The laser emitted by the laser has a high degree of directionality and focusing, high brightness and low energy loss. In some other embodiments, the light source 15 includes an LED lamp, which is small in size, suitable for applications powered by a low voltage power supply, and has high energy conversion efficiency and a long life.

[0032] exist Figure 1In the illustrated embodiment, the detector 16 is arranged directly below the window 121. The detector 16 is arranged directly below the window 121, which is conducive to receiving the scattered light signal with low loss. The fog detection device 1 also includes a condenser 17 and a filter 18. The condenser 17 is arranged at the front end of the detector 16, and the filter 18 is arranged on the side of the condenser 17 facing the window 121. The filter 18 filters the scattered light signal, and the condenser 17 focuses the filtered light signal and transmits it to the detector 16. The detector 16 receives the focused light signal and outputs the corresponding electrical signal to the main control board 14. In this way, most of the scattered light is gathered to the front end of the detector 16, and the scattering loss is small. In this embodiment, the filter 18 is set as a narrow-band bandpass filter, and the wavelength of the light passed by the filter 18 matches the wavelength of the light beam emitted by the light source 15. In this way, the energy loss can be reduced, the transmittance can be improved, the interference from light of other wavelengths can be reduced, the error can be reduced, and the accuracy of the result can be improved.

[0033] exist Figure 1 to Figure 2 In the illustrated embodiment, the dew collecting cover 12 includes a bottom groove 123 and inclined surfaces 124 disposed on both sides of the bottom groove 123. The bottom groove 123 is disposed at the connection of the inclined surfaces 124 on both sides and is located on one side of the window 121. The inclined surfaces 124 on both sides extend from bottom to top and from the edge of the bottom groove 123 toward the side away from the bottom groove 123. The inclined surfaces 124 on both sides form openings at one end away from the bottom groove 123. In this embodiment, the dew collecting cover 12 is a dovetail cross-section cover plate in which the bottom groove 123 is inlaid with a transparent medium panel, including the inclined surface 124, the window 121 and the bottom groove 123. The inclined surface 124 is composed of two metal plates with openings facing upward. The bottom groove 123 is distributed at the bottom connection line of the two inclined surfaces 124, and the transparent medium panel is inlaid in the bottom groove 123 in a penetrating manner. The transparent medium panel is embedded in one end of the bottom groove of the semi-conical dew collecting cover 12 in a penetrating manner. It is made of quartz glass. The top of the quartz glass is flush with the semi-conical generatrix of the bottom groove 123, and the bottom of the quartz glass is flush with the bottom of the entire dew collecting cover 12. The two are fixed and embedded by glue. The inclined surfaces 124 on both sides form an obtuse angle. The inclined surfaces 124 on both sides and the bottom groove 123 form a groove structure with a large mouth and a small bottom. In this way, the dew collecting cover 12 is conducive to collecting dew.

[0034] exist Figure 2 In the illustrated embodiment, the height of the end of the bottom groove 123 away from the window 121 is greater than the height of the end of the bottom groove 123 close to the window 121. Figure 2In the illustrated embodiment, the end of the bottom groove 123 away from the window 121 may be indicated by 123a, and the end of the bottom groove 123 close to the window 121 may be indicated by 123b. The window 121 is arranged at an end close to 123b relative to 123a. The height of the end 123a of the bottom groove 123 away from the window 121 is set to be greater than the height of the end 123b of the bottom groove 123 close to the window 121, and the height of the window 121 is located at the lowest point, which is conducive to gathering the dew collected by the bottom groove 123 to the surface of the transparent cover 122.

[0035] exist Figure 2 In the illustrated embodiment, the width of the bottom groove 123 at the end away from the window 121 is greater than the width of the bottom groove 123 at the end close to the window 121, and the projection area of ​​the bottom groove 123 onto the housing 11 gradually decreases from the end away from the window 121 to the end close to the window 121. Figure 2 In the illustrated embodiment, the horizontal cross section of the bottom groove 123 is a tapered structure, and the width of the end 123a of the bottom groove 123 away from the window 121 is set to be greater than the width of the end 123b of the bottom groove 123 close to the window 121. The projection area of ​​the window 121 onto the housing 11 is triangular, and the window 121 is located on one side of 123b, which is conducive to gathering the dew collected by the bottom groove 123 to the surface of the transparent cover 122 to form water drops 2.

[0036] exist Figure 2 In the embodiment shown, the material of the inclined surface 124 is metal. In this embodiment, the material of the inclined surface 124 can be aluminum, which has low cost, good corrosion resistance, stability and reliability. The inclined surface 124 is provided with a plurality of side grooves 125, and the bottoms of the plurality of side grooves 125 extend to the edge of the bottom groove 123. By providing a plurality of side grooves 125 on the inclined surface 124, the side grooves 125 play a role of guiding or draining, which is conducive to collecting dew. Figure 2 In the illustrated embodiment, the side groove 125 may be a semi-conical groove, and the vertex of the semi-conical groove touches the edge of the bottom groove 123. Such a configuration is conducive to collecting dew.

[0037] exist Figure 2 In the embodiment shown, the material of the bottom groove 123 is metal. In this embodiment, the material of the bottom groove 123 can be aluminum, which has low cost, good corrosion resistance, stability and reliability. The refrigeration element 13 includes a cold end, which is arranged toward the bottom of the bottom groove 123. The bottom groove 123 is set to metal, and the cold end of the refrigeration element 13 is arranged close to the bottom groove 123 made of metal. The metal is conducive to heat transfer, which can accelerate the cooling speed of the dew collected in the bottom groove 123.

[0038] In some embodiments, the fog detection device 1 further includes at least one fan (not shown), which is provided on at least one of the inclined surface 124 and the bottom groove 123. In this embodiment, the fan can be a fan. The fog detection device 1 includes one or more fans. The fan can be provided on the inclined surface 124 or on the bottom groove 123, which is not limited in this application. By providing a fan on at least one of the bottom groove 123 and the inclined surface 124 of the dew collection cover 12, the fan blows directly against the bottom groove 123 or the inclined surface 124, thereby increasing the dew collection efficiency, and the wind direction of the fan blows along the bottom groove 123, so that the dew passes through the window 121 quickly, increasing the self-cleaning property of the window 121, so as to clean the transparent cover plate 122 provided on the window 121, and avoid affecting the scattering effect due to the unclean transparent cover plate 122.

[0039] In some embodiments, the fog detection device 1 further includes a protective cover (not shown), which is arranged above the dew collection cover 12, and the material of the side of the protective cover facing the dew collection cover 12 is black anodized aluminum. In this embodiment, the protective cover can be a metal protective cover. A metal protective cover is provided just above the inclined surface of the dew collection cover 12, and the material of the side of the protective cover facing the inclined surface and the window is black anodized aluminum. The outer side of the inclined surface 124 and the window 121 of the dew collection cover 12 is provided with a metal protective cover for shielding rain and snow. By providing a metal protective cover, on the one hand, it can prevent precipitation from misjudging the fog detection device 1, and on the other hand, it can shield the external environment stray light of the window 121 to reduce the environmental noise received by the detector 16. The side of the metal protective cover facing the inclined surface 124 and the window 121 uses black anodized aluminum to reduce the self-reflection noise of the light source 15 of the fog detection device 1.

[0040] exist Figure 3 In the illustrated embodiment, the mist detection device 1 further includes a temperature sensor 19, which is disposed outside the housing 11 and is electrically connected to the main control board 14. The temperature sensor 19 is used to obtain the temperature of the current environment and transmit a corresponding temperature electrical signal to the main control board 14. The main control board 14 is connected to the temperature sensor 19, and when the detector 16 receives the scattered signal of the water droplets 2, the value of the temperature sensor is collected as the dew point value.

[0041] Combination Figures 1 to 3As shown, in this embodiment, the light source 15 is a laser, a 650nm laser diode is selected, the power is 5mw, the detector 16 is a silicon photodiode, the spectral detection range is 200-1100nm, the photosensitive surface is 1.2mm×1.2mm, the responsivity Re=0.55mA / mW, a narrow band filter 18 with a bandwidth of 10nm is installed in front of the detector 16, and the TEC is two 12V powered 20mm*20mm in size. The temperature sensor 19 is a negative temperature coefficient thermistor. The purpose of the fog detection device 1 is to determine whether the surrounding environment of the camera device 3 is close to the dew point, so as to determine the possibility of fogging, and provide a criterion for whether the camera device 3 needs to switch the filter to turn on the fog penetration mode. When the surrounding environment of the camera device 3 is fogged, the dew collecting cover 12 is close to the dew point. At this time, the TEC is turned on to cool the bottom groove 123 of the dew collecting cover 12. When the dew point temperature is reached, the dew drops begin to gather in the side grooves 125 on the inclined surface 124 and converge into water droplets along the bottom groove 123 and flow through the window 121. The laser passes through the window 121 and irradiates the water droplets, which are scattered. The intensity of the scattered signal is collected on the detector 16 through the converging mirror. Through the Mie scattering theory, the size and number of water droplets 2 can be calculated to determine the possibility of fogging and whether it is raining. The main control board 14 can also determine the possibility of fogging by controlling the working power of the TEC. For example, five power gradients are set and the power is increased in sequence. At the lowest power, condensation is found, and the possibility of fogging in the outside world increases at this time. The camera device 3 determines whether to switch the infrared filter to start the fog penetration mode by measuring the power of the TEC. The cover fog detection device 1 can be a semi-quantitative detection device with high stability and low cost.

[0042] The main control board 14 of this embodiment is provided with a controller (not shown) and an electronic device electrically connected to the controller. In some embodiments, the controller may include any suitable programmable circuit or device, such as a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic controller (PLC), and an application specific integrated circuit (ASIC). This is not limited in this application.

[0043] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0044] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A fog detection device, characterized in that: include: A shell and a dew collecting cover, a refrigeration component, a main control board, a light source and a detector arranged on the shell, the dew collecting cover is arranged on the top of the shell and the opening of the dew collecting cover is arranged to face the outside of the shell, the refrigeration component is arranged on the bottom of the dew collecting cover, one end of the dew collecting cover is provided with a window and a transparent cover plate covering the window, the light source and the detector are arranged below the window and the emitting end of the light source is arranged toward the window, and the main control board is electrically connected to the light source, the detector and the refrigeration component respectively; wherein, the refrigeration component cools down the dew collected by the dew collecting cover, the dew collecting cover gathers the cooled dew to the transparent cover plate to form water droplets, the emitting end of the light source emits a light beam that passes through the transparent cover plate to irradiate the water droplets and scatters, the detector receives the scattered light signal and outputs a corresponding electrical signal to the main control board, and the main control board determines whether there is fog in the current environment according to the electrical signal.

2. The fog detection device according to claim 1, characterized in that: The dew collecting cover includes a bottom groove and inclined surfaces on both sides of the bottom groove, the bottom groove is arranged at the connection of the inclined surfaces on both sides and is located on one side of the window, the inclined surfaces on both sides extend from bottom to top and from the edge of the bottom groove toward the side away from the bottom groove, and the inclined surfaces on both sides form the opening at one end relatively away from the bottom groove; wherein the height of the end of the bottom groove away from the window is greater than the height of the end of the bottom groove close to the window.

3. The fog detection device according to claim 2, characterized in that: The width of the bottom groove at one end away from the window is greater than the width of the bottom groove at one end close to the window, and the projection area of ​​the bottom groove projected onto the shell gradually decreases from the end away from the window to the end close to the window.

4. The fog detection device according to claim 2, characterized in that: The material of the inclined surface is metal; the inclined surface is provided with a plurality of side grooves, and the bottoms of the plurality of side grooves extend to the edge of the bottom groove.

5. The fog detection device according to claim 2, characterized in that: The bottom tank is made of metal; the refrigeration component comprises a cold end, and the cold end is arranged toward the bottom of the bottom tank.

6. The fog detection device according to claim 2, characterized in that: The fog detection device further includes at least one fan, which is arranged on at least one of the inclined surface and the bottom groove.

7. The fog detection device according to claim 1, characterized in that: The detector is arranged directly below the window; the fog detection device also includes a condenser and a filter, wherein the condenser is arranged at the front end of the detector, and the filter is arranged on the side of the condenser facing the window, the filter filters the scattered light signal, the condenser focuses the filtered light signal and transmits it to the detector, and the detector receives the focused light signal and outputs a corresponding electrical signal to the main control board; wherein the wavelength of light passing through the filter matches the wavelength of the light beam emitted by the light source.

8. The fog detection device according to claim 1, characterized in that: The fog detection device further comprises a protective outer cover, which is arranged above the dew collecting cover, and the material of the side of the protective outer cover facing the dew collecting cover is black anodized aluminum.

9. The fog detection device according to claim 1, characterized in that: The mist detection device further comprises a temperature sensor, which is arranged outside the housing and electrically connected to the main control board, and the temperature sensor is used to obtain the temperature of the current environment and transmit a corresponding temperature electrical signal to the main control board; and / or The shell is provided with an interface, the main control board is connected to the interface via a data line, and is electrically connected to an external camera device via the interface.

10. The fog detection device according to claim 1, characterized in that: The material of the transparent cover plate is quartz glass; and / or The light source includes an LED lamp or a laser.

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