CN206441013U - Ozone bypass flow stabilizing control system applied to dynamic calibration instrument - Google Patents
Ozone bypass flow stabilizing control system applied to dynamic calibration instrument Download PDFInfo
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- CN206441013U CN206441013U CN201621490948.0U CN201621490948U CN206441013U CN 206441013 U CN206441013 U CN 206441013U CN 201621490948 U CN201621490948 U CN 201621490948U CN 206441013 U CN206441013 U CN 206441013U
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- instrument
- flowmeter
- ozone
- gas
- valve opening
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Abstract
The utility model discloses a kind of ozone bypass flow stabilizing control system applied to dynamic calibration instrument, including gas mass flowmenter, zero gas mass flowmenter, ozone generator, reative cell, valve opening instrument, flowmeter and PID master control borads, valve opening instrument is installed on the pipeline between ozone generator and zero gas mass flowmenter, and flowmeter is then installed on the output pipe of ozone generator；PID master control borads are connected to the automatic feedback regulating loop that valve opening instrument is formed between flowmeter and valve opening instrument；The output pipe coupled reaction room of ozone generator after flowmeter, reative cell connection dynamic calibration instrument.The utility model with PID master control borads, valve opening instrument, flowmeter by being cooperated to control ozone flow, have the advantages that simple in construction, automaticity is high, precision is high, make stability of flow in setting value, in favor of accurate control carrier gas and the flow of calibrating gas, the final test of supplied gas analyzer and calibration.
Description
Technical field
The utility model is related to enviromental monitoring equipment technical field, more particularly to a kind of dynamic gas prover is supporting smelly
Oxygen flow control system.
Background technology
With the development and the raising of people's environmental consciousness of social economy, the public pays close attention to atmosphere polluting problem increasingly, right
The acquisition of atmosphere pollution information requires also increasingly strong.In order to monitor air pollution degree, it is necessary to using various high-precision
Monitoring instrument is monitored to various dusty gas, thus firstly the need of with the calibration gas of high precision concentration to these monitors
Device is calibrated.In Air quality automation monitoring system, dynamic calibration instrument is the dress for being calibrated to gas analyzer
Put.In calibration process, two-way mass flowmenter accurately controls the flow of carrier gas and calibrating gas, is uniformly mixed in hybrid chamber
Close, final supplied gas analyzer test, in ozone calibration process, the stability of bypass flow is most important.In the past, used more
Counterbalance valve steady pressure, makes stability of flow by metering hole.But counterbalance valve is expensive, and transported or environmental gas pressure
Power change has drift, is unfavorable for long-term discharge stability control.Therefore, someone's invention uses zero gas mass flowmenter and mark
Gas mass flowmenter coordinates magnetic valve etc. accurately to configure calibration gas, however, this scheme has complicated, automation journey
The shortcomings of degree is low, precision is not high enough.
Utility model content
The technical problems to be solved in the utility model be for prior art defect there is provided a kind of structure it is simpler, set
The ozone bypass flow stabilizing control system applied to dynamic calibration instrument that meter is more rationally, automaticity is high, control accuracy is high.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that：It is a kind of applied to dynamic calibration instrument
Ozone bypass flow stabilizing control system, including gas mass flowmenter, zero gas mass flowmenter, ozone generator and hair should
Room, the gas mass flowmenter connects some gas entrances, and the zero gas mass flowmenter connects zero gas entrance, and ozone occurs
Device connects zero gas mass flowmenter, reative cell connection gas mass flowmenter, it is characterised in that：Also include valve opening instrument,
Flowmeter and the PID master control borads with pid control algorithm system, valve opening instrument are installed on ozone generator and zero makings amount
On pipeline between flowmeter, flowmeter is then installed on the output pipe of ozone generator；PID master control borads are connected to flowmeter
The automatic feedback regulating loop of valve opening instrument is formed between valve opening instrument；Ozone generator after flowmeter
Output pipe coupled reaction room, reative cell connection dynamic calibration instrument；Picked out between zero gas mass flowmenter and valve opening instrument
One zero air pipes are directly communicated to dynamic calibration instrument.
PID is a closed loop control algorithm, its bypass flow size measured according to flowmeter in stream, when there is larger amplitude
The disturbance of degree or when significantly alterring set-point, due to now there is larger deviation, and system has inertia and delayed, therefore in product
In the presence of subitem, larger overshoot and prolonged fluctuation are often produced.Can be using separating measure be integrated, i.e., for this
When deviation is larger, cancel integral action；Just integral action is put into when deviation is smaller, so as to reach automatic, precision control valve
The flow of door aperture instrument.
Further, the gas entrance is provided with 1-4 roads, and each road sign gas entrance is uniformly connected to the gas quality stream
Gauge.
Preferably, infiltration oven module is provided with the gas porch, sets infiltration oven module to be effectively to use
Go to calibrate the gas analyzer of bigger monitoring range in the gas for producing Exact concentrations.
The photometer for being used for measuring ozone concentration, the concentration for measuring ozone are provided with the ozone generator.
The utility model has by being cooperated with PID master control borads, valve opening instrument, flowmeter to control ozone flow
Have the advantages that simple in construction, automaticity is high, precision is high, control is stable, make stability of flow in setting value, in favor of accurate control
The flow of carrier gas and calibrating gas processed, the final test of supplied gas analyzer and calibration.
Brief description of the drawings
Fig. 1 is the utility model structural schematic block diagram.
Embodiment
In the present embodiment, reference picture 1, the ozone bypass flow stabilizing control system applied to dynamic calibration instrument, bag
Include gas mass flowmenter, zero gas mass flowmenter, ozone generator and hair and answer room, gas mass flowmenter connects some gases
Entrance, the zero gas mass flowmenter connects zero gas entrance, and ozone generator connects zero gas mass flowmenter, reative cell connection mark
Gas mass flowmenter；Also include valve opening instrument, flowmeter and the PID master control borads with pid control algorithm system, valve
Aperture instrument is installed on the pipeline between ozone generator and zero gas mass flowmenter, is passed through by the air-flow of valve opening instrument control system zero
The flow of ozone branch road, flowmeter is then installed on the output pipe of ozone generator；PID master control borads are connected to flowmeter and valve
The automatic feedback regulating loop of valve opening instrument is formed between door aperture instrument；The output of ozone generator after flowmeter
Pipeline coupled reaction room, reative cell connection dynamic calibration instrument；1 are picked out between zero gas mass flowmenter and valve opening instrument
Air pipe is directly communicated to dynamic calibration instrument.
PID is a closed loop control algorithm, its bypass flow size measured according to flowmeter in stream, when there is larger amplitude
The disturbance of degree or when significantly alterring set-point, due to now there is larger deviation, and system has inertia and delayed, therefore in product
In the presence of subitem, larger overshoot and prolonged fluctuation are often produced.Can be using separating measure be integrated, i.e., for this
When deviation is larger, cancel integral action；Just integral action is put into when deviation is smaller, so as to reach precision control valve door aperture
The flow of instrument.
The gas entrance is provided with 4 tunnels (1-4 roads), and each road sign gas entrance is uniformly connected to the gas quality stream
Gauge.
Infiltration oven module is provided with the gas porch, sets infiltration oven module to be to be efficiently used for producing essence
The gas of true concentration goes to calibrate the gas analyzer of bigger monitoring range.
The photometer for being used for measuring ozone concentration, the concentration for measuring ozone are provided with the ozone generator.
Ozone generator produces ozone gas, and produces NO with NO reactions in the reaction chamber using gas-phase titration method2Gas；
Photometer is used to measure the ozone concentration produced, it is ensured that the precision of ozone.The data of flowmeter monitoring pass to control platform, pass through
The size of pid algorithm control valve aperture instrument, makes stability of flow in setting value.
The utility model is described in detail above, it is described above, only the preferred embodiment of the utility model and
, it is when the utility model practical range can not be limited, i.e., all to make equivalent changes and modifications according to the application scope, it all should still belong to this
In utility model covering scope.
Claims (4)
1. a kind of ozone bypass flow stabilizing control system applied to dynamic calibration instrument, including gas mass flowmenter, zero gas
Mass flowmenter, ozone generator and reative cell, the gas mass flowmenter connect some gas entrances, the zero makings amount
Flowmeter connects zero gas entrance, and ozone generator connects zero gas mass flowmenter, reative cell connection gas mass flowmenter, its spy
Levy and be：Also include valve opening instrument, flowmeter and the PID master control borads with pid control algorithm system, valve opening instrument
It is installed on the pipeline between ozone generator and zero gas mass flowmenter, flowmeter is then installed on the efferent duct of ozone generator
Lu Shang；PID master control borads are connected to the automatic feedback regulating loop that valve opening instrument is formed between flowmeter and valve opening instrument；Position
The output pipe coupled reaction room of ozone generator after flowmeter, reative cell connection dynamic calibration instrument；In zero makings amount
One zero air pipes are picked out between flowmeter and valve opening instrument and are directly communicated to dynamic calibration instrument.
2. the ozone bypass flow stabilizing control system according to claim 1 applied to dynamic calibration instrument, its feature exists
In：The gas entrance is provided with 1-4 roads, and each road sign gas entrance is uniformly connected to the gas mass flowmenter.
3. the ozone bypass flow stabilizing control system according to claim 2 applied to dynamic calibration instrument, its feature exists
In：The gas porch is provided with infiltration oven module.
4. the ozone bypass flow stabilizing control system according to claim 1 applied to dynamic calibration instrument, its feature exists
In：The photometer for being used for measuring ozone concentration is provided with the ozone generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621490948.0U CN206441013U (en) | 2016-12-30 | 2016-12-30 | Ozone bypass flow stabilizing control system applied to dynamic calibration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621490948.0U CN206441013U (en) | 2016-12-30 | 2016-12-30 | Ozone bypass flow stabilizing control system applied to dynamic calibration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206441013U true CN206441013U (en) | 2017-08-25 |
Family
ID=59643113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621490948.0U Active CN206441013U (en) | 2016-12-30 | 2016-12-30 | Ozone bypass flow stabilizing control system applied to dynamic calibration instrument |
Country Status (1)
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| CN (1) | CN206441013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577968A (en) * | 2020-12-02 | 2022-06-03 | 安徽皖仪科技股份有限公司 | Calibration gas circuit and calibration method of non-methane total hydrocarbon continuous monitoring system |
-
2016
- 2016-12-30 CN CN201621490948.0U patent/CN206441013U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114577968A (en) * | 2020-12-02 | 2022-06-03 | 安徽皖仪科技股份有限公司 | Calibration gas circuit and calibration method of non-methane total hydrocarbon continuous monitoring system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518100 Room 301, building 2, runheng Industrial Zone, No. 1, Liuxian Third Road, Xingdong community, Xin'an street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Bixing IOT Technology (Shenzhen) Co.,Ltd. Address before: 2-3 / F, building 2, runheng Dingfeng Industrial Park, Liuxian 2nd Road, Xin'an street, Bao'an District, Shenzhen, Guangdong 518000 Patentee before: ZTE INSTRUMENTS (SHENZHEN) Co.,Ltd. |