CN212275585U

CN212275585U - Visibility detector

Info

Publication number: CN212275585U
Application number: CN202021147940.0U
Authority: CN
Inventors: 陈曼; 温磊
Original assignee: Shaanxi China Communications Netcom Information Technology Co ltd
Current assignee: Smart cloud (Beijing) Technology Co.,Ltd.
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-01-01
Anticipated expiration: 2030-06-19

Abstract

The utility model discloses a visibility detects technical field's a visibility detector, the fixed infrared spectrum sensor that is provided with in inner chamber bottom center department of shell, the inner wall circumferencial direction of shell is anticlockwise evenly fixed be equipped with first laser instrument, second laser instrument and third laser instrument in proper order, constitute the laser field between first laser instrument, second laser instrument and the third laser instrument, be provided with scattering state aerosol layer in the laser field, the fixed battery that is provided with in inner chamber bottom of electric cabinet, the top left side electric connection of battery has the control box, control box electric connection has information collector, the top right side electric connection of battery has electrical source controller, makes the measuring result more reliable also improve the sensitivity and the resolution ratio of system, can improve the stability that detects in unit interval, has changed before the tradition, before, The disadvantage of poor stability of single-point transmission and reception of back scattering greatly improves the sensitivity and resolution of detection.

Description

Visibility detector

Technical Field

The utility model relates to a visibility detects technical field, belongs to atmospheric weather automatic checkout device scope, and the monitoring instrument of a group's fog (visibility) monitoring of the traffic road, highway way type environment of specially adapted intelligent transportation field urgent need specifically is a visibility detector.

Background

Mist is one of the extreme weather patterns. The characteristics of sudden mass fog, regionality, mobility and the like bring great harm to traffic safety, and no good method for monitoring and preventing exists at present. When the fog is generated, the visibility is suddenly reduced, the traffic is seriously influenced, and the flight of an airport is delayed; railways and highways are easy to cause major accidents and seriously threaten the life and property safety of people, and a plurality of countries in the world pay high attention to the detection of the cloud at present.

At present, the visibility monitoring equipment in China falls behind in technology, the market is monopolized by foreign products, the price is high, and the real-time atmospheric visibility monitoring work in the environment of the expressway and the shipping channel in China cannot be implemented. However, at present, the visibility and the fog group monitoring of the expressway in China are almost blank, so that the real-time monitoring and forecasting of the visibility and the fog group in local and regional places of the expressway cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a visibility detector to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a visibility detector, includes the shell, the fixed infrared spectrum sensor that is provided with in inner chamber bottom center department of shell, the inner wall circumferencial direction of shell is the anticlockwise even fixed first laser instrument, second laser instrument and the third laser instrument of being equipped with in proper order, constitute the laser field between first laser instrument, second laser instrument and the third laser instrument, be provided with scattering state aerosol layer in the laser field, the fixed electric cabinet that is provided with in top of shell, the top left side fixed wireless transmitter that is equipped with of electric cabinet, the fixed battery that is provided with in inner chamber bottom of electric cabinet, the top left side electric connection of battery has the control box, control box electric connection has information collector, the top right side electric connection of battery has electrical source controller.

Preferably, the included angles among the first laser, the second laser and the third laser are all 120 degrees, the first laser, the second laser and the third laser are all continuous lasers, the wavelength of the continuous lasers is 800-850 nm, and the power of the first laser, the power of the second laser and the power of the third laser are all adjustable to 200-800 mW.

Preferably, the electric cabinet adopts an IP65 type box body, and the control box is electrically connected with the wireless transmitter, the information collector, the power controller, the first laser, the second laser, the third laser and the infrared spectrum sensor respectively.

Preferably, the spectral bandwidth of the infrared spectrum sensor is 650-900 nm, and the detection exposure time of the infrared spectrum sensor can be adjusted to 1 mS-60S.

Preferably, the housing is assembled and molded by a plurality of injection molded parts, the parts are injection molded by engineering plastics, and the housing is not a transparent plastic shell.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model overcomes the shortcoming that the prior forward and backward scattering visibility meters with open light paths have low measurement precision in low visibility, and is completely different from the prior forward and backward single-point transmitting and receiving scattering visibility monitors, digital camera visibility measurement methods and visibility detectors composed of infrared CCD detectors with open detection light paths in structural optics and detection principles, thereby greatly improving the detection sensitivity and resolution;

2. the utility model adopts the infrared spectrum sensor to detect the scattering of aerosol particles in the spectrum range of 800-830 nm, and has good anti-interference performance; the mode of spatial multi-point detection (detection area increase) of the infrared spectrum sensor technology is used for replacing the existing single-point PIN photoelectric tube to carry out atmospheric aerosol scattering measurement technology, thereby effectively overcoming the randomness of the single-point PIN photoelectric tube for measuring atmospheric aerosol particle scattering, ensuring that the measurement result is more reliable, improving the sensitivity and resolution of the system, and improving the detection stability in unit time; the defect of poor stability of the traditional forward and backward scattering single-point transmission and reception is overcome, and the sensitivity and the resolution of detection are greatly improved;

3. the method for detecting the spectral intensity of the atmospheric aerosol overcomes the problems that the visibility monitor in a single-point receiving type scattered light intensity detection mode has small detection points, poor detection stability and is influenced by rain and snow when compared with the prior open type detection light path with front and back single-point emission;

4. the shell structure can completely block the interference of external light, avoid the influence of rain and snow, avoid the interference of insects such as spiders and the like, and meet the requirement of long-term work in the field; by adopting the modular design, the system has the advantages of simple structure, convenient field installation and replacement, low cost, easy networking and the like, and meets the visibility detection requirements of road traffic and highway environments;

5. the utility model has the advantages of reasonable design, to china's traffic road, the needs of highway operation safety control, research and development is suitable for the traffic road, the detecting instrument of highway environment visibility, with solve the traffic road, the real-time supervision of highway environment group fog, effectively promote the means that the safety precaution of highway environment visibility was taken precautions against, to reducing the road, the incidence of shipping major accident, guarantee people's the security of the lives and property, promote china's highway traffic, the improvement of marine defense meteorological safety overall technology and management level has great significance.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is the structure schematic diagram of the electric cabinet of the utility model.

In the figure: 1. a housing; 2. an infrared spectrum sensor; 3. a first laser; 4. a second laser; 5. a third laser; 6. a laser field; 7. a scattering state aerosol layer; 8. an electric cabinet; 9. a wireless transmitter; 10. a storage battery; 11. a control box; 12. an information collector; 13. and a power supply controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fog is one of the natural atmospheric forms, and is actually tiny water droplets floating in the air. In recent years, the detectors of various mists of the human utility model utilize the scattering, refraction and reflection effects of the mists under the irradiation of specific light; according to the scattering principle, the principle of measuring atmospheric visibility under certain conditions is determined; that is, the visibility value is equal to the atmospheric extinction coefficient (or atmospheric light attenuation coefficient) A, and according to the international consensus Koschmder principle, the atmospheric extinction coefficient A value is accurately measured, so that the MOR value can be calculated, and the relationship between the MOR and A is as follows:

MOR represents meteorological optical sight distance, and the working principle of the visibility detector is mainly based on accurate measurement of atmospheric extinction coefficient (or atmospheric light attenuation coefficient).

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a visibility detector, namely, the detection of group fog is realized by utilizing the principle that the fog generates scattering effect under the irradiation of specific light, comprising a shell 1, an infrared spectrum sensor 2 is fixedly arranged at the center of the bottom of an inner cavity of the shell 1, a first laser 3, a second laser 4 and a third laser 5 are sequentially and uniformly fixed and assembled on the inner wall of the shell 1 along the anticlockwise direction, a storage battery 10 can provide a stable 12V/2A working power supply for the infrared spectrum sensor 2, the first laser 3, the second laser 4 and the third laser 5 are arranged on a plane, a laser field 6 is formed among the first laser 3, the second laser 4 and the third laser 5, a scattering state aerosol layer 7 is arranged in the laser field 6, an electric cabinet 8 is fixedly arranged at the top of the shell 1, a wireless transmitter 9 is fixedly assembled at the left side of the top of the electric cabinet 8, the inner chamber bottom of electric cabinet 8 is fixed and is provided with battery 10, battery 10's top left side electric connection has control box 11, control box 11 electric connection has information collector 12, battery 10's top right side electric connection has power supply controller 13, and infrared spectrum sensor 2's detection window plane is the normal line of the laser line of perpendicular to laser instrument, and the distance between the two is 280 ~ 380mm, infrared spectrum sensor 2's output is connected with information collector 12's input, and the communication interface is RS-485 interface or RS-232 interface.

The included angles among the first laser 3, the second laser 4 and the third laser 5 are all 120 degrees, the first laser 3, the second laser 4 and the third laser 5 are all continuous lasers, the wavelength of the continuous lasers is 800-850 nm, and the power of the first laser 3, the power of the second laser 4 and the power of the third laser 5 can be adjusted to 200-800 mW;

the electric cabinet 8 adopts an IP65 type box body, and the control box 11 is respectively and electrically connected with the wireless transmitter 9, the information collector 12, the power supply controller 13, the first laser 3, the second laser 4, the third laser 5 and the infrared spectrum sensor 2;

the spectral bandwidth of the infrared spectrum sensor 2 is 650-900 nm, and the detection exposure time can be adjusted to 1 mS-60S;

the housing 1 is assembled and molded by a plurality of injection molded parts, the parts are injection molded by engineering plastics, and the housing 1 is an opaque plastic shell.

The working principle is as follows: the first laser 3, the second laser 4 and the third laser 5 are light sources for exciting atmospheric aerosol to generate scattering, the storage battery 10 can supply power for the whole instrument, multiple laser beams generated by the work of the first laser 3, the second laser 4 and the third laser 5 form a spatial high-density laser field 6 in the shell 1, weak aerosol particles in the atmosphere enter the laser field 6 and are excited by the laser field to generate scattering to form a scattering state aerosol layer 7, the infrared spectrum sensor 2 detects the scattering intensity value, the information collector 12 collects the data of the intensity value of atmospheric aerosol scattering output by the infrared spectrum sensor 2, the atmospheric visible distance is calculated according to the correlation between the atmospheric extinction coefficient and the visibility according to the rules of 'MOR meteorological optical viewing distance', the information collector 12 transmits the value to the control box 11 after processing, the control box 11 uploads the visibility value through the wireless transmitter 9, the utility model discloses a high sensitivity's infrared spectrum sensor 2, the scattering spectrum that detects the aerosol particle is carried out to 800 ~ 830nm spectral range, has good interference immunity, utilizes infrared spectrum sensor 2 technical space multiple spot to detect the mode that increases detection area and replaces current single-point PIN photoelectric tube and carry out atmospheric aerosol scattering measurement technique, has effectively overcome the randomness that single-point PIN photoelectric tube measured atmospheric aerosol particle scattering, makes the measuring result more reliable for the sensitivity and the resolution ratio that have improved the system; the structural design of the shell 1 blocks the interference of external light, avoids the influence of natural rain and snow, avoids the interference of insects, and meets the requirement of long-term work in the field.

Attached:

the world weather organization in 1957 proposed that an optical measurement of the optical state of the atmosphere, weather optical line of sight (MOR), i.e., the length of the path through the atmosphere where an incandescent lamp emits a parallel beam of light having a color temperature of 2700K and the light is reduced to its initial 0.05, i.e., MOR, was used. The mathematical expression is as follows:

the extinction coefficient σ is the attenuation of light due to scattering and absorption by atmospheric aerosols and molecules, and is equal to the sum of the scattering coefficient b and the absorption coefficient c, i.e.:

σ＝b+c。

according to the Koschmider principle, there is a functional relationship between the meteorological optical apparent distance MOR and the extinction coefficient σ. As long as σ is accurately determined, the MOR value can be calculated. The WT-1 visibility meter measures the atmospheric extinction coefficient by a forward scattering method, and the visibility is obtained by conversion according to a formula, and the Committee (CIMO) proposed the definition of "Meteorological optical distance (MOR)" in 1957.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A visibility detector, comprising a housing (1), characterized in that: the infrared spectrum sensor (2) is fixedly arranged at the center of the bottom of an inner cavity of the shell (1), a first laser (3), a second laser (4) and a third laser (5) are sequentially and uniformly and fixedly assembled on the circumference of the inner wall of the shell (1) anticlockwise, a laser field (6) is formed among the first laser (3), the second laser (4) and the third laser (5), a scattering state aerosol layer (7) is arranged in the laser field (6), an electric cabinet (8) is fixedly arranged at the top of the shell (1), a wireless transmitter (9) is fixedly assembled on the left side of the top of the electric cabinet (8), a storage battery (10) is fixedly arranged at the bottom of the inner cavity of the electric cabinet (8), a control box (11) is electrically connected to the left side of the top of the storage battery (10), an information collector (12) is electrically connected to the control box (11), the right side of the top of the storage battery (10) is electrically connected with a power supply controller (13).

2. The visibility detector of claim 1, wherein: the included angle between the first laser device (3), the second laser device (4) and the third laser device (5) is 120 degrees, the first laser device (3), the second laser device (4) and the third laser device (5) are continuous laser devices, the wavelength of the continuous laser devices is 800-850 nm, and the power of the first laser device (3), the power of the second laser device (4) and the power of the third laser device (5) can be adjusted to 200-800 mW.

3. The visibility detector of claim 1, wherein: the electric cabinet (8) adopts an IP65 type box body, and the control box (11) is respectively electrically connected with the wireless transmitter (9), the information collector (12), the power supply controller (13), the first laser (3), the second laser (4), the third laser (5) and the infrared spectrum sensor (2).

4. The visibility detector of claim 1, wherein: the spectral bandwidth of the infrared spectrum sensor (2) is 650-900 nm, and the detection exposure time of the infrared spectrum sensor can be adjusted to 1 mS-60S.

5. The visibility detector of claim 1, wherein: the shell (1) is formed by assembling a plurality of injection-molded parts, the parts are formed by injection molding of engineering plastics, and the shell (1) is an opaque plastic shell.