CN115586138A - Environmental engineering atmospheric pollution detection device - Google Patents
Environmental engineering atmospheric pollution detection device Download PDFInfo
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- CN115586138A CN115586138A CN202211079472.1A CN202211079472A CN115586138A CN 115586138 A CN115586138 A CN 115586138A CN 202211079472 A CN202211079472 A CN 202211079472A CN 115586138 A CN115586138 A CN 115586138A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/171—Systems in which incident light is modified in accordance with the properties of the material investigated with calorimetric detection, e.g. with thermal lens detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The invention discloses an environmental engineering atmospheric pollution detection device, which belongs to the technical field of atmospheric pollution detection and comprises a light source and a gas pool, wherein the end part of the gas pool can enter light; the gas pool comprises a gas pool body and a shell sleeved outside the gas pool body; the gas pool body is provided with an acoustic resonant cavity, the end part of the acoustic resonant cavity is provided with a window sheet, and an acoustic sensitive element which is contacted with the inner surface of the acoustic resonant cavity is arranged in the gas pool body; the gas cell body is also provided with a gas inlet channel and a gas outlet channel which are communicated with the acoustic resonant cavity; a filter is arranged at the air inlet end of the air inlet channel; the air outlet end of the air outlet channel is communicated with the air pump; the outer part of the gas pool body is fixedly connected with an ultrasonic oscillator; in the working state, the ultrasonic oscillator works to vibrate the gas pool body so that dust in the acoustic resonant cavity is stripped from the acoustic resonant cavity and is sucked to the outside by the air pump.
Description
Technical Field
The invention relates to the technical field of air pollution detection, in particular to an air pollution detection device for environmental engineering.
Background
Environmental changes, pollution and its impact on ecology have become important issues of global concern. With the rapid development of economy in China, the tasks of protecting the environment, strengthening the environmental supervision and realizing sustainable development are very difficult;
at present, an environment monitoring network system suitable for the national conditions of China is established in China, corresponding regulations and standards are established, the intensity of environment law enforcement and supervision is continuously improved, the measurement technology and detection equipment are also continuously improved, but the distribution density of high-precision equipment is too low, so that the scientific argumentation of the atmospheric pollution control by environment monitoring is severely restricted; in addition, the existing high-precision equipment has different use functions, use conditions and the like, so that the problems of low detection efficiency and slow reaction exist in the detection process;
in the prior art, chinese patent CN103954560B discloses a spatial light beam coupling apparatus for photoacoustic multi-component gas detection, comprising: the composite light source, the window, the gas pool and the sound sensitive element; the output light beam in the composite light source is modulated to excite the gas in the gas pool, so that the gas in the gas pool is excited and then undergoes radiationless transition to generate a photo-thermal signal, the photo-thermal signal is measured by the acoustic sensor, and the signal of the acoustic sensor is analyzed and processed, so that the concentration of the measured gas can be converted.
The coupling device has the advantages of small volume, quick response, low background noise, simultaneous detection of multiple components and the like, is suitable for a photoacoustic spectrum monitoring system of environmental gas, and can also be used for multi-light-source coupling and detection of related equipment in the fields of spectrum analysis, analytical instruments and the like, but a gas pool of the coupling device cannot be self-cleaned, and the problems of low detection efficiency and slow reaction still exist in the detection process;
therefore, in view of the above problems, it is necessary to provide an atmosphere pollution detection device for environmental engineering, which has high detection efficiency, high detection precision and accurate detection result.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an atmosphere pollution detection device for environmental engineering.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention discloses an atmosphere pollution detection device for environmental engineering, which comprises:
a light source;
the end part of the gas cell can enter light;
the gas pool comprises a gas pool body and a shell sleeved outside the gas pool body;
the gas pool body is provided with a sound resonant cavity, the end part of the sound resonant cavity is provided with a window sheet, and a sound sensitive element which is contacted with the inner surface of the sound resonant cavity is arranged in the gas pool body;
the gas cell body is also provided with a gas inlet channel and a gas outlet channel which are communicated with the acoustic resonant cavity;
a filter is arranged at the air inlet end of the air inlet channel;
the air outlet end of the air outlet channel is communicated with the air pump;
an ultrasonic oscillator is fixedly connected to the outer part of the gas pool body;
under the working state, the ultrasonic oscillator works to vibrate the gas cell body, so that dust in the sound resonant cavity is stripped from the sound resonant cavity and is sucked to the outside by the air pump.
Furthermore, the single end of the gas cell body is near the light, and a plurality of reflectors are distributed on the light path of the light source.
Further, the gas cell body with casing inner chamber lateral wall clearance fit, casing inner chamber diapire links firmly the vibration isolator, through the vibration isolator with ultrasonic oscillator contacts.
Furthermore, the top wall of the shell is provided with mounting holes corresponding to the positions of the air inlet channel and the air outlet channel, and the mounting holes are provided with vibration isolation sleeves which are in contact with pipelines of the air inlet channel and the air outlet channel.
Furthermore, the air inlet channel and the air outlet channel are located at the ends of the acoustic resonant cavities and are respectively provided with an elastic diaphragm, the elastic diaphragms are provided with a plurality of micropores, and the micropores are in a closed state in a free state without external force.
Furthermore, the gas cell body is a multi-reflection extraction sample cell.
Further, the gas cell body the inlet end of inlet channel has linked firmly in proper order the sampling head with the filter, the air passes through in proper order the sampling head with the filter gets into inlet channel.
Furthermore, the included angle between the window sheet and the sound resonant cavity is 5-8 degrees.
Furthermore, flexible sections are arranged on pipelines of the air inlet channel and the air outlet channel far away from the end of the acoustic resonant cavity, and the air pump and the filter are in transition connection through the flexible sections.
In the technical scheme, the atmosphere pollution detection device for the environmental engineering, provided by the invention, has the beneficial effects that:
1. according to the gas cell body designed by the invention, the ultrasonic oscillator is arranged between the bottom end of the gas cell body and the shell, when the gas cell body needs self-cleaning, the air pump and the ultrasonic oscillator are started, the ultrasonic oscillator vibrates the gas cell body to enable dust in the acoustic resonant cavity to be stripped from the acoustic resonant cavity, the air pump exhausts air, and the air is discharged from the air inlet channel, the acoustic resonant cavity and the air outlet channel, so that the gas cell body can be cleaned in time, the acoustic resonant cavity of the gas cell body is ensured to be clean, the detection efficiency is ensured, the detection precision is improved, and the accuracy of a detection result is ensured;
2. the gas cell body is in clearance fit with the side wall of the inner cavity of the shell, the shell is contacted with the ultrasonic oscillator through the vibration isolation pad, the vibration isolation sleeve is arranged in the mounting hole of the top wall of the shell and is contacted with the pipelines of the air inlet channel and the air outlet channel through the vibration isolation sleeve, and the vibration energy can be effectively prevented from being transmitted to the outside of the shell through the vibration isolation pad and the vibration isolation sleeve in the structure;
3. the gas cell body designed by the invention is a multi-reflection extraction sample cell, the gas inlet end of the gas inlet channel of the gas cell body is fixedly connected with the sampling head and the filter in sequence, and air enters the gas inlet channel through the sampling head and the filter in sequence, so that the sampling channel and the self-cleaning channel of the detection device share one channel, the whole gas cell has a compact structure, saves space and is small in size.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic diagram of the overall structure of an atmospheric pollution detection device in environmental engineering disclosed by the invention;
FIG. 2 is a schematic view of a light source structure of the atmospheric pollution detection device in environmental engineering disclosed by the present invention;
FIG. 3 is a schematic view of the overall structure of another embodiment of the atmospheric pollution detection device for environmental engineering disclosed in the present invention;
fig. 4 is a schematic structural diagram of the whole of another embodiment of the environmental engineering atmospheric pollution detection device disclosed in the present invention.
Description of the reference numerals:
a light source 1; a collimation light source 11, a reflection prism 12, a reflection prism 13, a reflection prism 14, a reflection prism 15, a reflection prism 16 and a reflection prism 17; a window 2; a gas cell body 3; a housing 31; a vibration-isolating pad 32; an air intake passage 33; an air outlet channel 34; a vibration isolating sleeve 35; an elastic diaphragm 36; a flexible section 37; the acoustic sensor 4; an ultrasonic oscillator 5; a filter 6; an air pump 7; a sampling head 8; and a detector 9.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1;
the invention relates to an atmosphere pollution detection device for environmental engineering, which comprises:
a light source 1 and a gas cell with an end capable of entering light;
the gas pool comprises a gas pool body 3 and a shell 31 sleeved outside the gas pool body 3;
the gas pool body 3 is provided with an acoustic resonant cavity, the end part of the acoustic resonant cavity is provided with a window 2, and the inside of the gas pool body 3 is provided with a sound sensitive element 4 which is in contact with the inner surface of the acoustic resonant cavity;
wherein, the gas cell body 3 is also provided with an air inlet channel 33 and an air outlet channel 34 which are communicated with the acoustic resonant cavity;
the air inlet end of the air inlet channel 33 is provided with a filter 6;
the air outlet end of the air outlet channel 34 is communicated with the air pump 7;
the outer part of the gas pool body 3 is fixedly connected with an ultrasonic oscillator 5;
under the working state, the ultrasonic oscillator 5 works to oscillate the gas tank body 3, so that dust in the acoustic resonant cavity is stripped from the acoustic resonant cavity and is sucked to the outside by the air pump 7, the purpose of self-cleaning the gas tank body 3 is realized, the detection efficiency and precision are further improved, and the accuracy of a detection result is ensured;
specifically, as shown in fig. 1, the gas cell includes a housing 31 and a gas cell body 3, the gas cell body 3 is installed in the housing 31, light can enter from two ends of the gas cell body 3, a light entrance hole is formed in a corresponding position of the housing 31, the gas cell body 3 can enter light from two ends simultaneously or from a single end, a sound resonant cavity is formed in the gas cell body 3, the sound resonant cavity is cylindrical, window pieces 2 are installed at two ends of the sound resonant cavity, and a sound sensitive element 4 is installed in the gas cell and contacts with the inner surface of the sound resonant cavity;
light beams output by the light source 1 are emitted into the gas cell body 3 through the window piece 2 along the direction with a certain angle on the axis of the acoustic resonant cavity, gas in the gas cell body 3 is excited by incident light beams and then undergoes radiationless transition to generate photo-thermal signals, the generated photo-thermal signals are measured by the acoustic sensor 4, then the photo-thermal signals obtained by measurement of the acoustic sensor 4 are analyzed and processed to obtain the concentration acoustic sensor 4 of the measured gas, a low-frequency microphone is selected, the response is flat within the range of 20-1000Hz, and the output is maximum. Preferably, the included angle between the window 2 and the acoustic resonant cavity is 5-8 degrees, so that the phenomenon that the surface reflected light of the window 2 returns in the original path to generate the noise of the optical etalon is avoided.
As shown in fig. 2, preferably, a single end of the gas cell body 3 is near the light, and a plurality of reflectors are disposed on the light path of the light source 11.
Specifically, the light source 11 is composed of a collimation light source 11, a reflection prism 12, a reflection prism 13, a reflection prism 14, a reflection prism 15, a reflection prism 16 and a reflection prism 17;
the collimated light source 11 is reflected by a reflecting prism 12, a reflecting prism 13, a reflecting prism 14, a reflecting prism 15, a reflecting prism 16 and a reflecting prism 17, then enters the gas cell body 3 through a first window sheet 22 or a second window sheet 25, and finally is received by a detector 9;
as shown in FIG. 1;
the gas cell comprises a gas cell body 3 housing 31;
the shell 31 is sleeved outside the gas cell body 3, the ultrasonic oscillator 5 is installed between the bottom end of the gas cell body 3 and the shell 31, the upper part of the gas cell body 3 is provided with an air inlet channel 33 and an air outlet channel 34 which are communicated with the acoustic resonant cavity, the air inlet end of the air inlet channel 33 is connected with the filter 6 through a pipeline, the air outlet end of the air outlet channel 34 is connected with the air pump 7 through a pipeline, when the gas cell body 3 is self-cleaned, the air pump 7 and the ultrasonic oscillator 5 are started, the ultrasonic oscillator 5 vibrates the gas cell body 3 to enable dust in the acoustic resonant cavity to be stripped from the acoustic resonant cavity, the air pump 7 pumps air, and the air is discharged through the air inlet channel 33, the acoustic resonant cavity and the air outlet channel 34, in addition, when the air enters from the air inlet end of the air inlet channel 33, the air enters through the filter 6, the clean air is filtered through the filter 6 and then enters the air inlet channel 33, and the cleaning efficiency is improved;
as shown in fig. 1;
the gas cell body 3 is in clearance fit with the side wall of the inner cavity of the shell 31, the bottom wall of the inner cavity of the shell 31 is fixedly connected with the vibration isolating pad 32, the vibration isolating pad 32 is in contact with the ultrasonic oscillator 5 to absorb vibration energy and prevent the vibration energy from being transmitted to the outside of the shell 31, and the ultrasonic oscillator 5 vibrates to transmit the vibration energy to the gas cell body 3 during work;
as shown in fig. 1;
mounting holes are formed in the top wall of the shell 31 corresponding to the positions of the air inlet channel 33 and the air outlet channel 34, vibration isolating sleeves 35 are mounted in the mounting holes, and the vibration isolating sleeves 35 are in contact with pipelines of the air inlet channel 33 and the air outlet channel 34, so that vibration energy is prevented from being transmitted between the pipelines and the shell 31;
as shown in fig. 1;
the air inlet channel 33 and the air outlet channel 34 are respectively provided with an elastic membrane 36 at the end of the acoustic resonant cavity, the elastic membrane 36 is provided with a plurality of micropores, the micropores are in a closed state under the free state without external force, when the air pump 7 works, air is pumped by the air pump, the elastic membrane 36 begins to deform along with the increase of air pressure of the air inlet channel 33 and the air outlet channel 34, and the micropores are opened to enable air to pass through;
as shown in fig. 3;
the gas cell body 3 is a multi-reflection extraction sample cell.
The inlet end of the inlet channel 33 of the gas pool body 3 is sequentially and fixedly connected with the sampling head 8 and the filter 6, and air sequentially enters the inlet channel 33 through the sampling head 8 and the filter 6, so that the sampling channel and the self-cleaning channel of the detection device share one channel, the whole gas pool is compact in structure, the space is saved, and the size is small.
As shown in fig. 4;
the flexible sections 37 are arranged on the pipelines of the air inlet channel 33 and the air outlet channel 34 far away from the end of the acoustic resonant cavity, and are in transitional connection with the air pump 7 and the filter 6 through the flexible sections 37, so that the vibration energy is prevented from being transmitted to the air pump 7 and the filter 6 through the pipelines, and the failure rate of the air pump 7 and the filter 6 is favorably reduced.
In the technical scheme, the atmosphere pollution detection device for the environmental engineering, provided by the invention, has the beneficial effects that:
1. according to the gas cell body designed by the invention, the ultrasonic oscillator is arranged between the bottom end of the gas cell body and the shell, when the gas cell body needs self-cleaning, the air pump and the ultrasonic oscillator are started, the ultrasonic oscillator vibrates the gas cell body to enable dust in the acoustic resonant cavity to peel off the acoustic resonant cavity, the air pump pumps air, and air is discharged through the air inlet channel, the acoustic resonant cavity and the air outlet channel, so that the gas cell body can be cleaned in time, the acoustic resonant cavity of the gas cell body is ensured to be clean, the self-cleaning purpose is realized, the detection efficiency is further favorably ensured, the detection precision is improved, and the accuracy of a detection result is ensured;
2. the gas cell body is in clearance fit with the side wall of the inner cavity of the shell, the shell is contacted with the ultrasonic oscillator through the vibration isolation pad, the vibration isolation sleeve is arranged in the mounting hole of the top wall of the shell and is contacted with the pipelines of the air inlet channel and the air outlet channel through the vibration isolation sleeve, and the vibration energy can be effectively prevented from being transmitted to the outside of the shell through the vibration isolation pad and the vibration isolation sleeve in the structure;
3. the gas cell body designed by the invention is a multi-reflection extraction sample cell, the gas inlet end of the gas inlet channel of the gas cell body is fixedly connected with the sampling head and the filter in sequence, and air enters the gas inlet channel through the sampling head and the filter in sequence, so that the sampling channel and the self-cleaning channel of the detection device share one channel, the whole gas cell is compact in structure, space-saving and small in size.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and are not to be construed as limiting the scope of the invention.
Claims (9)
1. Environmental engineering atmospheric pollution detection device, its characterized in that includes:
a light source (1);
the end part of the gas cell can enter light;
the gas pool comprises a gas pool body (3) and a shell (31) sleeved outside the gas pool body (3);
the gas pool body (3) is provided with a sound resonant cavity, the end part of the sound resonant cavity is provided with a window sheet (2), and a sound sensitive element (4) which is in contact with the inner surface of the sound resonant cavity is arranged in the gas pool body (3);
wherein the gas pool body (3) is also provided with a gas inlet channel (33) and a gas outlet channel (34) which are communicated with the acoustic resonant cavity;
a filter (6) is installed at the air inlet end of the air inlet channel (33);
the air outlet end of the air outlet channel (34) is communicated with the air pump (7);
the outer part of the gas cell body (3) is fixedly connected with an ultrasonic oscillator (5);
under the working state, the ultrasonic oscillator (5) works to oscillate the gas pool body (3) so that dust in the sound resonant cavity is stripped from the sound resonant cavity and is sucked to the outside by the air pump (7).
2. The environmental engineering atmospheric pollution detection device of claim 1, wherein;
the single-end short-distance light of the gas cell body (3), a plurality of reflectors are distributed on the light path of the light source (1).
3. The environmental engineering atmospheric pollution detection device of claim 1, wherein;
gas cell body (3) with casing (31) inner chamber lateral wall clearance fit, casing (31) inner chamber diapire has linked firmly vibration isolator (32), through vibration isolator (32) with ultrasonic oscillator (5) contact.
4. The environmental engineering atmospheric pollution detection device of claim 1, wherein;
the top wall of the shell (31) is provided with mounting holes corresponding to the positions of the air inlet channel (33) and the air outlet channel (34), the mounting holes are provided with vibration isolation sleeves (35), and the vibration isolation sleeves (35) are in contact with pipelines of the air inlet channel (33) and the air outlet channel (34).
5. The environmental engineering atmospheric pollution detection device of claim 1, wherein;
the air inlet channel (33) and the air outlet channel (34) are located elastic diaphragms (36) are mounted at the ends of the acoustic resonant cavities, a plurality of micropores are formed in the elastic diaphragms (36), and the micropores are in a closed state in a free state without external force.
6. The environmental engineering atmospheric pollution detection device of any one of claims 1-5, wherein;
the gas cell body (3) is a multi-reflection extraction sample cell.
7. The environmental engineering atmospheric pollution detection device of claim 6, characterized in that;
the gas cell body (3) the inlet end of inlet channel (33) has linked firmly in proper order sampling head (8) with filter (6), and the air passes through in proper order sampling head (8) with filter (6) get into inlet channel (33).
8. The environmental engineering atmospheric pollution detection device of any one of claims 1-5, wherein;
the included angle between the window sheet (2) and the sound resonant cavity is 5-8 degrees.
9. The environmental engineering atmospheric pollution detection device of any one of claims 1-5, wherein;
and flexible sections (37) are respectively arranged on pipelines of the air inlet channel (33) and the air outlet channel (34) far away from the end of the acoustic resonator, and the air pump (7) and the filter (6) are in transitional connection through the flexible sections (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211079472.1A CN115586138A (en) | 2022-09-05 | 2022-09-05 | Environmental engineering atmospheric pollution detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211079472.1A CN115586138A (en) | 2022-09-05 | 2022-09-05 | Environmental engineering atmospheric pollution detection device |
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| CN115586138A true CN115586138A (en) | 2023-01-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116660477A (en) * | 2023-07-26 | 2023-08-29 | 中国人民解放军63968部队 | Atmospheric pollution early warning device |
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- 2022-09-05 CN CN202211079472.1A patent/CN115586138A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116660477A (en) * | 2023-07-26 | 2023-08-29 | 中国人民解放军63968部队 | Atmospheric pollution early warning device |
| CN116660477B (en) * | 2023-07-26 | 2023-10-10 | 中国人民解放军63968部队 | Atmospheric pollution early warning device |
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