CN112255187A - Ozone on-line measuring system - Google Patents
Ozone on-line measuring system Download PDFInfo
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- CN112255187A CN112255187A CN202011094983.1A CN202011094983A CN112255187A CN 112255187 A CN112255187 A CN 112255187A CN 202011094983 A CN202011094983 A CN 202011094983A CN 112255187 A CN112255187 A CN 112255187A
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000001514 detection method Methods 0.000 claims abstract description 64
- 238000005259 measurement Methods 0.000 claims abstract description 30
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000000746 purification Methods 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an ozone online detection system, which belongs to the technical field of atmospheric monitoring and comprises a front-end detection device and a signal acquisition and processing unit; the front-end detection device comprises a detection tube, an air inlet period control structure consisting of an ozone purification filter, a period electromagnetic valve and an air inlet is mounted at the air inlet end of the detection tube, the air inlet period control structure is used for switching an ozone measurement period, the period is divided into an ozone-free period and an ozone-containing period, and an air suction pump is further mounted at one end, far away from the air inlet period control structure, of the detection tube; the pipeline of the detection tube is also communicated with a UV light source, a measurement photosensitive module and a reference photosensitive module, the UV light source is used for emitting ultraviolet light for ozone absorption, the measurement photosensitive module collects the intensity of the ultraviolet light after being absorbed, and the reference photosensitive module collects the intensity of the ultraviolet light before being absorbed. The system can continuously and accurately measure the concentration of ozone in the air, and the use is more convenient and reliable.
Description
Technical Field
The invention relates to the technical field of atmosphere monitoring systems, in particular to an ozone online detection system.
Background
Ozone has strong disinfecting, bleaching and deodorizing properties and is widely used in daily life, but ozone is also a substance polluting the environment, and therefore, it is necessary to monitor the concentration of ozone, for example, the concentration of ozone in the atmosphere.
Most of the present monitoring devices for ozone concentration are mainly used for measurement by, for example, ultraviolet absorption method, but are often used indoors due to being susceptible to strong ultraviolet light outdoors, and furthermore, the concentration of ozone is monitored by an ultraviolet absorption principle, the data information of gas and gas after ozone removal is generally collected by two sensing units respectively, the concentration of ozone in the gas is calculated by the ratio, but the test method and the test device not only have complicated design and increased operation cost, and because the deviation that components and parts own exists, there is certain error when using two sensing units, reduce the degree of accuracy, especially to the ozone detection of low concentration, the concentration of ozone is reacted through the absorption ultraviolet ray condition, and traditional measurement mode appearance gas and ultraviolet ray can not abundant contact, lead to ozone absorption not enough to influence the precision of measuring easily.
Disclosure of Invention
The invention aims to solve the problems of complex structure, low detection precision and inconvenient use of the traditional ozone concentration detection system, and provides an ozone online detection system which has the advantages of continuously and accurately measuring the concentration of ozone in air and being more convenient and reliable to use.
The invention achieves the above purpose through the following technical scheme, an ozone online detection system comprises a front-end detection device and a signal acquisition and processing unit;
the front-end detection device comprises a detection tube, an air inlet period control structure consisting of an ozone purification filter, a period electromagnetic valve and an air inlet is mounted at the air inlet end of the detection tube, the air inlet period control structure is used for switching an ozone measurement period, the period is divided into an ozone-free period and an ozone-containing period, and an air suction pump is further mounted at one end, far away from the air inlet period control structure, of the detection tube; the pipeline of the detection tube is also communicated with a UV light source, a measurement photosensitive module and a reference photosensitive module, the UV light source is used for emitting ultraviolet light for ozone absorption, the measurement photosensitive module collects the intensity of the ultraviolet light after absorption, and the reference photosensitive module collects the intensity of the ultraviolet light before absorption;
the signal acquisition processing unit is in signal connection with the measurement photosensitive module and the reference photosensitive module, the ultraviolet light intensity change value is calculated by comparing the numerical values of the two photosensitive modules, and the concentration of ozone contained in the air is calculated by comparing the ultraviolet light intensity change values in the ozone-free period and the ozone-containing period.
Preferably, the detection tube is a glass tube, the reflection film is laid in the glass tube, and cavities are arranged at two ends of the glass tube and used for placing the UV light source, the measurement photosensitive module and the reference photosensitive module.
Preferably, the inner wall of the detection tube is provided with a plurality of transparent flow equalizing plates which are arranged in a staggered mode, and the sample gas in the detection tube is dispersed through the transparent flow equalizing plates.
Preferably, a light condensing module is further installed between the UV light source and the detection tube, and the light condensing module consists of a beam splitter and a plano-convex lens and is used for focusing the ultraviolet light on the measurement photosensitive module and the reference photosensitive module in a shunt way.
Preferably, the detection tube is internally provided with a pressure detection module and a temperature detection module, and the temperature detection module is not contacted with the sample gas.
Preferably, the measurement photosensitive module and the reference photosensitive module are both photodiodes, and both the measurement photosensitive module and the reference photosensitive module are installed in the light-blocking shield.
Compared with the prior art, the invention has the beneficial effects that: divide into the ozone measurement cycle of circulation through the cycle control structure of admitting air and do not have the ozone cycle and have the ozone cycle, in this in-process, the concentration of ozone is calculated to the condition of absorption through contrast ultraviolet ray, make the measurement that the concentration of ozone can last, facilitate the use, and measure the transparent flow equalizing plate that distributes in the detection tube of ozone and be used for breaking up the appearance gas, make it evenly be full of the detection tube, it is more abundant with the ultraviolet ray contact, make the absorption of ultraviolet ray more accurate, thereby the concentration of accurate calculation ozone, ozone concentration measurement's precision has been improved greatly.
Drawings
FIG. 1 is a schematic diagram of the overall system configuration of the present invention.
Fig. 2 is a schematic structural diagram of a front-end detection device according to the present invention.
FIG. 3 is a schematic view of the structure of the detection tube of the present invention.
In the figure: 1. the device comprises a detection tube, 2, a UV light source, 3, a light gathering module, 4, a measuring photosensitive module, 5, a periodic electromagnetic valve, 6, an air pump, 7, a reference photosensitive module, 8, a pressure detection module, 9, a temperature detection module, 10, an ozone purification filter, 11, a signal acquisition and processing unit, 12, an air inlet, 13 and a transparent flow equalizing plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an ozone online detection system includes a front-end detection device and a signal acquisition and processing unit 11; the front end detection device comprises a detection tube 1, an air inlet period control structure consisting of an ozone purification filter 10, a period electromagnetic valve 5 and an air inlet 12 is installed at the air inlet end of the detection tube 1, the air inlet period control structure is used for switching ozone measurement periods, the periods are divided into an ozone-free period and an ozone-containing period, and an air suction pump 6 is further installed at one end, far away from the air inlet period control structure, of the detection tube 1; the pipeline of the detection tube 1 is also communicated with a UV light source 2, a measurement photosensitive module 4 and a reference photosensitive module 7, the UV light source 2 is used for emitting ultraviolet light for ozone absorption, the measurement photosensitive module 4 collects the intensity of the ultraviolet light after absorption, the reference photosensitive module 7 collects the intensity of the ultraviolet light before absorption, the ozone-free period is set to be T0, the ozone-containing period is set to be T1, the two working periods (T0 and T1) are circularly controlled and switched through a period electromagnetic valve 5, and the periods T0 and T1 respectively comprise an air inlet stage and a detection stage. In the air inlet stage, the UV power supply 2 is in a low power consumption mode, the ultraviolet light is weak, the power consumption of the UV power supply 2 is reduced, energy is saved, and the service life of the UV power supply 2 is prolonged; in the detection stage, the UV power supply 2 is in a normal working mode and normally emits ultraviolet light to absorb ozone. The period electromagnetic valve 5 is provided with two air outlets and an air inlet 12, wherein one air outlet passes through the ozone purification filter 10, when the air outlet passing through the ozone purification filter 10 is closed, the other outlet enters an ozone period when the other outlet is opened, the air outlet passing through the ozone purification filter 10 enters an ozone-free period when the other outlet is closed, the air suction pump 6 is used for sucking air into the detection tube 1 for ozone concentration measurement, the UV light source 2 emits UV light for ozone absorption, the measurement photosensitive module 4 is used for measuring a photoelectric intensity signal after the ozone absorbs the UV light, the reference photosensitive module 7 is used for measuring a photoelectric intensity signal before the ozone absorbs the UV light, the two photoelectric intensity signals are compared, so that the loss amount of the UV light can be calculated, the loss amount of the UV light is recorded in the ozone-free period, and the loss amount of the UV light is recorded in the ozone period, the concentration of ozone is calculated by subtracting the two loss amounts.
The signal acquisition and processing unit 11 is connected with the measuring photosensitive module 4 and the reference photosensitive module 7 through signals, the ultraviolet light intensity change value is calculated by comparing the numerical values of the two photosensitive modules, the concentration of ozone in air is calculated by comparing the ultraviolet light intensity change values in the ozone-free period and the ozone-containing period, the signal acquisition and processing unit 11 can be a PLC controller, a built-in operation module calculates the ozone concentration, and a control panel is arranged, and the period time value of the ozone-free period set to be T0 and the period time value of the ozone-containing period set to be T1 are set.
As shown in fig. 3, the detecting tube 1 is a glass tube, and the reflecting film is laid in the inside of the glass tube, two ends of the glass tube are provided with cavities for placing the UV light source 2, the measuring photosensitive module 4 and the reference photosensitive module 7, the inner wall of the detecting tube 1 is provided with a plurality of transparent flow equalizing plates 13 which are arranged in a staggered manner, the sample gas in the detecting tube 1 is dispersed through the transparent flow equalizing plates 13, when the sample gas flows through the detecting tube 1, the transparent flow equalizing plates 13 can scatter the sample gas, so that the sample gas is in contact with the ultraviolet light filled in the detecting tube 1, the effect of absorbing the ultraviolet light by the ozone in the sample gas is better, and the precision of measuring the ozone concentration is greatly improved.
A light condensing module 3 is also arranged between the UV light source 2 and the detecting tube 1, the light condensing module 3 is composed of a beam splitter and a plano-convex lens and is used for focusing ultraviolet light on a measuring photosensitive module 4 and a reference photosensitive module 7 in a shunting way, the ultraviolet light generated by the UV light source 2 can be shunted to the measuring photosensitive module 4 and the reference photosensitive module 7 through the light condensing module 3 for the two photosensitive modules to simultaneously detect ultraviolet light electric signals, a pressure detecting module 8 and a temperature detecting module 9 are also arranged inside the detecting tube 1, the temperature detecting module 9 is not contacted with sample gas, the pressure detecting module 8 can detect the air pressure condition in the detecting tube 1, the temperature detecting module 9 can detect the temperature condition in the detecting tube 1, the measuring photosensitive module 4 and the reference photosensitive module 7 are photodiodes, and the measuring photosensitive module 4 and the reference photosensitive module 7 are both arranged in a light isolating shield, can prevent through separating light guard shield that measurement photosensitive module 4 and reference photosensitive module 7 receive the influence of external visible light, photodiode can convert the light signal of ultraviolet light into the signal transmission and give signal acquisition processing unit 11, carries out the calculation of ultraviolet light intensity.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An ozone online detection system is characterized by comprising a front-end detection device and a signal acquisition and processing unit (11);
the front-end detection device comprises a detection tube (1), wherein an air inlet period control structure consisting of an ozone purification filter (10), a period electromagnetic valve (5) and an air inlet (12) is installed at the air inlet end of the detection tube (1), the air inlet period control structure is used for switching an ozone measurement period, the period is divided into an ozone-free period and an ozone-containing period, and an air suction pump (6) is further installed at one end, far away from the air inlet period control structure, of the detection tube (1); the pipeline of the detection tube (1) is also communicated with a UV light source (2), a measurement photosensitive module (4) and a reference photosensitive module (7), the UV light source (2) is used for emitting ultraviolet light for ozone absorption, the measurement photosensitive module (4) collects the intensity of the ultraviolet light after absorption, and the reference photosensitive module (7) collects the intensity of the ultraviolet light before absorption;
the signal acquisition and processing unit (11) is in signal connection with the measurement photosensitive module (4) and the reference photosensitive module (7), an ultraviolet light intensity change value is calculated by comparing numerical values of the two photosensitive modules, and the concentration of ozone contained in the air is calculated by comparing ultraviolet light intensity change values in an ozone-free period and an ozone-containing period.
2. The on-line ozone detection system as claimed in claim 1, wherein the detection tube (1) is a glass tube, and a reflective film is laid inside the glass tube, and two ends of the glass tube are provided with cavities for placing the UV light source (2), the measurement photosensitive module (4) and the reference photosensitive module (7).
3. The on-line ozone detection system as claimed in claim 2, wherein the inner wall of the detection tube (1) is distributed with a plurality of transparent flow equalizing plates (13) arranged in a staggered manner, and the sample gas in the detection tube (1) is dispersed by the transparent flow equalizing plates (13).
4. An ozone online detection system according to claim 1, characterized in that a light-focusing module (3) is further installed between the UV light source (2) and the detection tube (1), and the light-focusing module (3) is composed of a beam splitter and a plano-convex lens, and is used for focusing the ultraviolet light onto the measurement photosensitive module (4) and the reference photosensitive module (7) in a shunt way.
5. The on-line ozone detection system as claimed in claim 1, wherein the detection tube (1) is further internally provided with a pressure detection module (8) and a temperature detection module (9), and the temperature detection module (9) is not in contact with the sample gas.
6. The on-line ozone detection system as claimed in claim 1, wherein the measurement photosensitive module (4) and the reference photosensitive module (7) are photodiodes, and the measurement photosensitive module (4) and the reference photosensitive module (7) are installed in a light-blocking shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011094983.1A CN112255187A (en) | 2020-10-14 | 2020-10-14 | Ozone on-line measuring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011094983.1A CN112255187A (en) | 2020-10-14 | 2020-10-14 | Ozone on-line measuring system |
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| CN112255187A true CN112255187A (en) | 2021-01-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702285A (en) * | 2021-07-21 | 2021-11-26 | 北京师范大学 | Ozone sailing monitor |
| CN114354527A (en) * | 2022-01-14 | 2022-04-15 | 张全星 | Detection module of ozone concentration analyzer |
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| CN1525156A (en) * | 2003-09-16 | 2004-09-01 | 上海大学 | Ozone concentration detection method and device used for ozone box |
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| CN104155254A (en) * | 2014-07-03 | 2014-11-19 | 苏州宏瑞净化科技有限公司 | Ozone concentration analyzer |
| CN108281078A (en) * | 2018-03-14 | 2018-07-13 | 北京建筑大学 | The simulated experiment platform of the pipe leakage diffusion of underground pipe gallery model pipe |
| CN209542439U (en) * | 2018-12-11 | 2019-10-25 | 苏州宏瑞净化科技有限公司 | High-concentrated ozone analyzer |
| CN110455734A (en) * | 2019-08-14 | 2019-11-15 | 合肥福瞳光电科技有限公司 | The monitoring method and its monitoring device of ozone concentration |
| CN209745902U (en) * | 2018-12-25 | 2019-12-06 | 中国安全生产科学研究院 | large-scale calorimetric system |
| CN210923461U (en) * | 2019-08-14 | 2020-07-03 | 合肥福瞳光电科技有限公司 | Ozone concentration monitoring device |
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2020
- 2020-10-14 CN CN202011094983.1A patent/CN112255187A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525156A (en) * | 2003-09-16 | 2004-09-01 | 上海大学 | Ozone concentration detection method and device used for ozone box |
| CN102658712A (en) * | 2012-04-28 | 2012-09-12 | 黄山金瑞泰科技有限公司 | Drying device |
| CN104155254A (en) * | 2014-07-03 | 2014-11-19 | 苏州宏瑞净化科技有限公司 | Ozone concentration analyzer |
| CN108281078A (en) * | 2018-03-14 | 2018-07-13 | 北京建筑大学 | The simulated experiment platform of the pipe leakage diffusion of underground pipe gallery model pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702285A (en) * | 2021-07-21 | 2021-11-26 | 北京师范大学 | Ozone sailing monitor |
| CN114354527A (en) * | 2022-01-14 | 2022-04-15 | 张全星 | Detection module of ozone concentration analyzer |
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Application publication date: 20210122 |