CN104360692B - The feed back control system of low concentration standard ozone generator - Google Patents
The feed back control system of low concentration standard ozone generator Download PDFInfo
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- CN104360692B CN104360692B CN201410661858.2A CN201410661858A CN104360692B CN 104360692 B CN104360692 B CN 104360692B CN 201410661858 A CN201410661858 A CN 201410661858A CN 104360692 B CN104360692 B CN 104360692B
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Abstract
The present invention relates to the feed back control systems of low concentration standard ozone generator, are formed including pressure regulator, ozone generator, flow controller, gas circuit valve group, double light path ultraviolet photometer, air extractor and embedded computer.The present invention solves the problems, such as that generation low concentration ozone gas accuracy is not high, realizes the control and regulation of the ozone generator of low concentration and exports the real time calibration of concentration, has the advantages of response time is fast, high certainty of measurement.The laboratories distributions such as standard transmission, the calibration of ozone analyzer present invention can apply to ozone gas and the production of mobile ozone calibrating gas.
Description
Technical field
Calibration and feedback control the present invention relates to low concentration ozone generator more particularly to low concentration ozone can be occurred
The device of feedback control and real time calibration is carried out inside device.
Background technology
Ozone is that pollutants in air chemistry poisons the main person of participating in developed and urges power, is prediction pollutants in air
The main monitoring object of harm.
Ozone is a kind of strong oxidizer, and stability is very poor, can voluntarily be decomposed into oxygen at normal temperatures, and temperature raising, which is decomposed, to be added
Soon.Therefore, ozone standard gas cannot use the preparation method of traditional gas standard substance to be prepared, stored, transported.It prepares
Ozone standard gas must use the method for " match and use ".
At present, China tentatively builds up National Environmental air quality monitoring network, and the continuous monitoring of ozone gas has become it
In must survey one of project.Therefore, to the metering and calibration of ozone analyzer magnitude, ozone measurement criteria is established, realizes magnitude
It is necessary with tracing to the source for international correlate values with standard transmission.
There is similar low concentration ozone generator in the market, ozone gas can be generated, but output concentration cannot be accurately real
When measurement and feedback control, output flow also can not dynamic regulation.
Invention content
The purpose of the present invention is be directed to above-mentioned present situation, it is desirable to provide a kind of feedback control of low concentration standard ozone generator
Device.
The realization method of the object of the invention is：The feed back control system of low concentration standard ozone generator, difference be,
Including pressure regulator, ozone generator, flow controller, gas circuit valve group, double light path ultraviolet photometer, air extractor and embedding
Enter formula computer；The air of clean dry after pressure regulator shunts enter ozone generator, then ozone gas with it is pure
Only dry gas exports after mixing, and an ozone gas shunting part for output enters double light path ultraviolet photometer, passes through
Pressure flow detection is carried out behind light pond, then is discharged by air extractor；Double light path ultraviolet photometer is to the concentration of ozone gas of output
It measures in real time, the signal of measurement, which is exported to embedded computer, to be calculated, and the concentration value being calculated is embedding compared with setting value
Enter formula computer to control to adjust ozone generator in real time.
Low pressure mercury lamp method of radiating can be used in ozone generator or high-voltage corona discharge obtains.Low pressure mercury lamp uses high frequency
Switching Power Supply is powered, and generates ultraviolet radioactive, the pure air after dry decontamination, will be in air under the irradiation of ultraviolet radioactive
Oxygen molecule be combined into ozone molecule, generate ozone gas, the concentration of ozone gas and the radiation intensity of low pressure mercury lamp are directly proportional.
Another high-voltage corona discharge places two metallic conductors at the inside and outside both ends of glass ozonizer as electrode, and use is up to ten thousand
The power supply power supply of low current is lied prostrate, is loaded at electrode both ends, pure air flows through ozonizer, and the oxygen molecule in air is in high pressure
Ozone molecule is generated in the case of corona.
Flow controller can accurately measure the gas flow of output in real time, can also be according to the control of embedded computer
Signal Regulation flow processed.
The ozone gas that gas circuit valve group generates pure air and ozone generator according to the control instruction of embedded computer
Body enters double light path photometer measurement in a manner that timesharing is alternate.
Double light path ultraviolet photometer is equipped with ultraviolet source, and one end of ultraviolet source is equipped with spectroscope, by ultraviolet light point
Into two-way directional light.It is equipped with two-way light pond, and optical filter, window glass, photoelectric detector and stream are respectively equipped with per light pond all the way
Measure device for pressure measurement.
In above scheme, the concentration of ozone gas of output is detected by double light path ultraviolet photometer, and detection signal is exported to embedding
Enter the calculating that formula computer carries out concentration data.
In above scheme, embedded computer can carry out dynamic regulation and control to the output concentration of ozone generator.It is embedding
Enter the ozone flow of formula computer real-time acquisition output, the ozone range of flow of output can be changed as needed.Embedding assembly
Machine compares according to the flow value of the ozone flow value after setting and output, sends out instruction and adjusts flow controller in real time, makes output
Flow value it is consistent with setting value, can dynamic realtime adjust.
In above scheme, embedded computer can to ozone generator export ozone gas flow carry out dynamic regulation and
Control.Embedded computer acquires the photometric measuring signal of double light path in real time, and converting concentrations value is calculated to collected signal,
The concentration value that the concentration value of calculating occurs with the ozone generator needs set is compared and calibrated, makes the concentration value of output
It is consistent with setting value.
In above scheme, gas path joint material used is PTFE, PVDF or PFA.
Compared with the prior art, the advantage of the invention is that：
1）Ozone output concentration is measured using double light path photometer in real time, ozone is made to export concentration precision higher, is realized
The laboratory and scene of ozone gas standard are transmitted；
2）Flow is acquired and adjusted using embedded computer, and output flow dynamic is adjustable, makes ozone generator defeated
Go out gas for more analyzers, use is more convenient；
3）Structure of the present invention can also minimize, it can be achieved that ozone gas standard transmit it is portable, mobile.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
In Fig. 1,1-pressure regulator, 2- low concentration ozone generators, 3-ozone generating element, 4- ozone concentration controls
Element processed, 5- big flow controllers, 6- Small Flow Control devices, 7- three-way connections, 8- three-way connections, 9 ozone outlets, 10
Embedded computer, 11- gas circuit valve groups, 12- spectroscopes, 13- ultraviolet sources, 14- double light path ultraviolet photometers, 15-
Heating unit, 16- optical filters A, 17- optical filter B, 18- light pond B, 19- light pond A, 20-A roads flow pressure measuring devices,
21-B roads flow pressure measuring devices, the inspection of 22- window glass B, 23- window glass A, 24-photoelectric detector A, 25- photoelectricity
Survey device B, 26-three-way connection, 27- air extractors.
Specific embodiment
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
The present invention relates to the feed back control systems of low concentration standard ozone generator, occur including pressure regulator, ozone
Device, flow controller, gas circuit valve group, double light path ultraviolet photometer, air extractor and embedded computer composition.Clean dry
Air enter ozone generator after pressure regulator shunts, then the gas of ozone gas and clean dry is by mixing
After export.An ozone gas shunting part for output enters double light path ultraviolet photometer, and pressure flow inspection is carried out behind light pond
It surveys, then is discharged by air extractor.Double light path ultraviolet photometer passes through periodic calibration, and the concentration of ozone gas of output is surveyed in real time
Amount, the signal of measurement, which is exported to embedded computer, to be calculated, and the concentration value being calculated is compared with setting value, embedded meter
Calculation machine controls to adjust ozone generator in real time.The present invention solves generation, and the accuracy of low concentration ozone gas is not high asks
Topic realizes the control and regulation of the ozone generator of low concentration and exports the real time calibration of concentration, has the response time fast, measure
Advantage with high accuracy.Present invention can apply to ozone gas standard transmit, the laboratories distribution such as the calibration of ozone analyzer and
Mobile ozone calibrating gas produces.
Shown in please referring to Fig.1, the structure diagram of the feed back control system of low concentration standard ozone generator of the present invention,
It is ultraviolet including pressure regulator 1, ozone generator 2, big flow controller 5, Small Flow Control device 6, gas circuit valve group 11, double light path
Photometer, air extractor 27 and embedded computer 10 form.American TI Company can be used in embedded computer
OMAP4350 is primary processor, and periphery is integrated with serial communication interface, color touch LCD Interface, WLAN/Internet nets
Network interface, USB data interface, power interface and SD storage cards etc..It can will be counted with the signal of the external input of timely collection
The data of calculation are shown, are uploaded, are stored.
The air of clean dry enters ozone generator 2 after the shunting of pressure regulator 1, exports to Small Flow Control device
It is connect after 6 adjustings with one end of three-way connection 7.Pure air of the another way after the shunting of pressure regulator 1 passes through big flow
Controller 5 detects and controls flow, one end connection of three-way connection 7 after output, two-way gas mix at the three-way connection 7 after with
One end connection of three-way connection 8, the other end of three-way connection 8 connect output gas with ozone delivery outlet 9.
Ozone generating element 3 and ozone concentration control element 4 are installed on ozone generator 2, it is certain for persistently generating
The ozone gas of concentration can also control to adjust the concentration of ozone gas output.It is also equipped with heating unit, by its work temperature
Degree control is at 48 DEG C ± 1 DEG C.
The other end of the three-way connection 8 of the ozone gas of output is connect with gas circuit valve group 11, and pressure regulator 1 will be pure
An air flow part is to gas circuit valve group 11.
The control power supply of gas circuit valve group 11 is connected with embedded computer 11, according to its control instruction, by the pure of input
Air and ozone gas timesharing are exported to the gas circuit entrance of double light path ultraviolet photometer 14.
14 one end of double light path ultraviolet photometer is equipped with ultraviolet source 13, and ultraviolet source 13 is divided into two-way by spectroscope 12
Ultraviolet light, by one group of optical filter A16, optical filter B17 filtering after, light pond A19, light pond B18 are respectively enterd, using window
Glass A23 and window glass B22, then detected by photoelectric detector A24 and photoelectric detector B25, detection signal be respectively connected to
Embedded computer 10.
Two-way is tested gas and respectively enters the light pond A19 of double light path ultraviolet photometer 14 and light pond B18, after output respectively into
Enter A roads flow pressure measuring device 20 and B roads flow pressure measuring device 21 carries out pressure flow and detects and controls, then defeated simultaneously
Go out to three-way connection 26, finally connect with air extractor 27, discharged by air extractor 27.
Heating unit 15 is installed, for the heated at constant temperature to ultraviolet source 13, heating on double light path ultraviolet photometer 14
Temperature is controlled at 50 DEG C ± 1 DEG C, ensure that the peak value and stability of light source output.
Ozone generating element 3, ozone concentration control element 4, big flow controller 5, gas circuit valve group 11, ultraviolet source 13,
Control port of the control port of heating unit 15 respectively with embedded computer 10 is connected.
A roads flow pressure measuring device 20, B roads flow pressure measuring device 21, photoelectric detector A24, photoelectric detector
The signal output interface of B25 is connected respectively with the signal acquisition port of embedded computer 10, and each signal is adopted in real time
Collection processing.
Double light path ultraviolet photometer 14 passes through periodic calibration, the concentration of ozone gas of output is measured in real time, the letter of measurement
Number output is calculated to embedded computer 10, and for the concentration value being calculated compared with setting value, embedded computer 10 is right
Ozone generator 2 is controlled to adjust in real time.
Claims (5)
1. the feed back control system of low concentration standard ozone generator, which is characterized in that occur including pressure regulator, ozone
Device, flow controller, gas circuit valve group, double light path ultraviolet photometer, air extractor and embedded computer；The sky of clean dry
Gas enters ozone generator after pressure regulator shunts, and then ozone gas and the gas of clean dry are defeated after mixing
Going out, an ozone gas shunting part for output enters double light path ultraviolet photometer, behind A, B two-way light pond and window glass,
It is detected again by two-way photoelectric detector and flow pressure measuring device, then discharged by air extractor；Double light path ultraviolet photometer pair
The concentration of ozone gas of output measures in real time, and the signal of measurement, which is exported to embedded computer, to be calculated, and what is be calculated is dense
For angle value compared with setting value, embedded computer controls to adjust ozone generator in real time；
Wherein, the double light path ultraviolet photometer is equipped with heating unit, and the heating unit adds applied to ultraviolet source constant temperature
Heat；
The air of clean dry after pressure regulator shunts is entered into ozone generator, exports to Small Flow Control device and adjusts
One end with the first three-way connection is connect afterwards, and pure air of the another way after pressure regulator shunts is controlled by big flow
Device detects and controls flow, and the other end after output with the first three-way connection is connect, and two-way gas mixes at the first three-way connection
One end after conjunction with the second three-way connection is connect, and the other end of the second three-way connection connect output gas with ozone delivery outlet；It is smelly
Ozone generating element and ozone concentration control element are installed, for persistently generating certain density ozone gas on Oxygen Generator
Body also controls to adjust the concentration of ozone gas output, it is also equipped with heating unit, its operating temperature is controlled at 48 DEG C ± 1
℃。
2. the feed back control system of low concentration standard ozone generator according to claim 1, which is characterized in that output it is smelly
Oxygen bulk concentration is detected by double light path ultraviolet photometer, and detection signal exports to embedded computer the meter for carrying out concentration data
It calculates.
3. the feed back control system of low concentration standard ozone generator according to claim 1, which is characterized in that embedded meter
Calculation machine carries out dynamic regulation and control to the output concentration of ozone generator.
4. the feed back control system of low concentration standard ozone generator according to claim 1, which is characterized in that embedded meter
Calculation machine carries out dynamic regulation and control to the ozone gas flow that ozone generator exports.
5. the feed back control system of low concentration standard ozone generator according to claim 1, which is characterized in that gas used
Pipeline connector material is PTFE, PVDF or PFA.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105334299A (en) * | 2015-12-15 | 2016-02-17 | 北京雪迪龙科技股份有限公司 | Standard gas generation system and method for dynamically monitoring standard gas |
| CN106501202A (en) * | 2016-09-30 | 2017-03-15 | 深圳市赛宝伦科技有限公司 | A kind of transmission method of normal concentration ozone |
| CN106680231B (en) * | 2017-01-23 | 2023-09-29 | 山东智普测控技术有限公司 | Ozone concentration analyzer device with automatic zero calibration function and analysis method |
| CN107153106A (en) * | 2017-06-29 | 2017-09-12 | 北京竹青世纪科技有限公司 | A kind of dynamic dilution gas calibration device |
| CN109748244A (en) * | 2019-02-01 | 2019-05-14 | 北京雪迪龙科技股份有限公司 | A kind of low concentration ozone generating device and the method for preparing low concentration ozone |
| CN117288705B (en) * | 2023-09-25 | 2024-07-19 | 武汉怡特环保科技有限公司 | Miniature ultraviolet absorption method multipath absorption tank ozone gas sensor based on Internet of things |
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| US6277288B1 (en) * | 1999-07-12 | 2001-08-21 | Joseph Gargas | Combined ozonation and electrolytic chlorination water purification method |
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Denomination of invention: Feedback Control Device of Low Concentration Standard Ozone Generator Effective date of registration: 20220823 Granted publication date: 20180710 Pledgee: Wuhan area branch of Hubei pilot free trade zone of Bank of China Ltd. Pledgor: WUHAN YITE ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2022420000270 |
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