CN207964796U - Gas detecting system - Google Patents
Gas detecting system Download PDFInfo
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- CN207964796U CN207964796U CN201821254193.3U CN201821254193U CN207964796U CN 207964796 U CN207964796 U CN 207964796U CN 201821254193 U CN201821254193 U CN 201821254193U CN 207964796 U CN207964796 U CN 207964796U
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Abstract
The utility model is related to field of gas detection, disclose a kind of gas detecting system, including：Under test gas source, sensor group and alignment unit, sensor group are connect under test gas source, and alignment unit is connected between under test gas source and sensor group.Wherein, alignment unit includes zero point correction module, range calibration module and handover module, under test gas source is selectively connected to sensor group or is connected under test gas source with sensor group by zero point correction module or is connected to range calibration module with sensor group by handover module, it is completed to the detection of gas, the calibration of zero and the calibration of range point to corresponding, system can be switched over by handover module, after carrying out zero point correction and range calibration, test mode is being switched back to.Due to having had both the calibration of zero and range point, the accuracy of gas detection data is improved.
Description
Technical field
The utility model is related to field of gas detection, more particularly to a kind of gas detecting system.
Background technology
Currently, quick economic development and energy consumption bring great pressure to earth atmosphere environmental improvement, with
Recent environmental problems are constantly prominent, and people are in order to find out the source of environmental pollution, it is proposed that the concept of " grid-based management ",
And the core of " grid-based management " is miniature surrounding air detecting system, system installation is simple, low cost, layouts conveniently,
Have become the optimal selection of managers.
Existing gas detecting system does not have the calibration function of zero and range point usually, can not be protected when using at the scene
The accuracy of data is demonstrate,proved, and is difficult to carry out the instrument calibration in later stage.
Utility model content
（One）Technical problems to be solved
The purpose of this utility model is to provide a kind of gas detecting system, and when gas detection can have both zero and range point
Calibration, improve the accuracy of detection data.
（Two）Technical solution
In order to solve the above-mentioned technical problem, on the one hand the utility model provides a kind of gas detecting system, the gas detection
System includes：Under test gas source；Sensor group is connect with the under test gas source；Alignment unit is connected to the under test gas
Between source and the sensor group；Wherein, the alignment unit includes zero point correction module, range calibration module and switching mould
The under test gas source is selectively connected to the sensor group or by the under test gas source by block, the handover module
It is connected to the sensor group by the zero point correction module or connects the range calibration module and the sensor group
It is logical.
Preferably, the handover module include the first valve and the second valve, first valve include first input end,
Second input terminal and output end, second valve include input terminal, the first output end and second output terminal, described to be measured
Gas source is connected to the first input end of first valve, and the range calibration module is connected to the second of first valve
Input terminal, the output end of first valve are connect with the input terminal of second valve, the first output of second valve
End is connect with the sensor group, the second output terminal of second valve and the zero point correction module and the sensor
Group concatenation.
Preferably, the gas detecting system includes test mode, zero point correction state and range calibration state；Institute
It states under test mode, the first input end of first valve is connected to output end and the second input terminal ends, second valve
The input terminal of door is connected to the first output end and second output terminal is ended；Under the zero point correction state, first valve
First input end be connected to output end and the second input terminal ends, the input terminal of second valve is connected to second output terminal
And first output end cut-off；Under the range calibration state, the second input terminal of first valve be connected to output end and
First input end ends, and the input terminal of second valve is connected to the first output end and second output terminal is ended.
Preferably, the range calibration module includes：Calibrating gas source is connect with the handover module；Flowmeter bypasses,
It is arranged on the pipeline between the calibrating gas source and the handover module.
Preferably, the gas detecting system further includes：Exclusion device is connected to the under test gas source and the calibration
Between unit.
Preferably, the gas detecting system further includes：Sampling pump is connected to the alignment unit and the sensor group
Between.
Preferably, the gas detecting system further includes：Pressure adjusts bypass, is arranged in the sampling pump and the sensing
On pipeline between device group.
（Three）Advantageous effect
According to gas detecting system provided by the utility model, the handover module is selectively by under test gas source and biography
Sensor group be connected to or by under test gas source be connected to sensor group by zero point correction module or by range calibration module and biography
Sensor group is connected to.When under test gas source to be connected to sensor group, the detection to the under test gas is carried out；When by gas to be measured
When body source is connected to by zero point correction module with sensor group, zero point correction can be carried out；When by range calibration module with sensing
When device group is connected to, range calibration can be carried out.During gas detection, system can be switched over by handover module,
After carrying out zero point correction and range calibration, then switch back to test mode.Due to having had both the calibration of zero and range point, improve
The accuracy of gas detection data.Wherein, zero point correction module is mainly filtered the under test gas of process, is gone by physics
It removes and the method for chemistry removal removes interference gas therein, to convert under test gas to zero gas, the zero of the application
For point calibration structure compared with the external zero numerous and jumbled gas generation device of tradition, zero gas can be by being serially connected under test gas approach pipe
The zero point correction module converter of road obtains, and structure is more simplified, it is easier to be implemented by being transformed on existing gas detecting system.
In a preferred embodiment, handover module includes the first valve and the second valve, the first valve and the second valve example
It such as three end solenoid valves, is combined by the break-make that valve group is respectively held, the automatic of zero and range point in gas detecting system may be implemented
Calibration and switching.
Description of the drawings
Fig. 1 is the structural schematic diagram of the gas detecting system of the utility model embodiment；
Fig. 2 is the flow chart of the gas detection method of the utility model embodiment.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Example is not intended to limit the scope of the present invention for illustrating the utility model.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
The utility model provides a kind of gas detecting system, and Fig. 1 is the gas detecting system of the utility model embodiment
Structural schematic diagram, the gas detecting system include：Under test gas source 100, sensor group 200 and alignment unit 300, sensor
Group 200 is connect under test gas source 100, dirt of the sensor group 200 by multiple electrochemical sensors of installation under test gas
Dye object is tested.Alignment unit 300 is connected between under test gas source 100 and sensor group 200.Wherein, alignment unit 300
Including zero point correction module 310, range calibration module 320 and handover module 330, handover module 330 selectively will be to be measured
Gas source 100 is connected to sensor group 200 or by under test gas source 100 by zero point correction module 310 and sensor group 200
Range calibration module 320 is connected to by connection with sensor group 200.
Zero point correction module 310 can be Zero calibration apparatus, and zero point correction module 310 mainly carries out the under test gas of process
Filtering is removed interference gas therein by the method for physical removal and chemistry removal, to convert under test gas to
Zero gas.When under test gas source 100 is connected to by zero point correction module 310 with sensor group 200, the zero of under test gas conversion
Gas enters sensor group 200 and is detected, and the parameter detected can be with the corresponding parameter of mark zero, to realize zero point correction.
For the zero point correction structure of the application compared with the external zero numerous and jumbled gas generation device of tradition, zero gas can be to be measured by being serially connected in
The conversion of zero point correction module 310 on gas approach pipeline obtains, and structure is more simplified, it is easier to by existing gas detection system
It is transformed and implements on system.
Range calibration module 320 can discharge the calibrating gas of predetermined amount of flow, calibrating gas can be standard nitrogen dioxide,
The standard solids gases such as standard sulfur dioxide, standard carbon monoxide, standard ozone.When by range calibration module 320 and sensor
When 200 connection of group, the calibrating gas of the control predetermined amount of flow of range calibration module 320 enters sensor group 200 and is detected, and detects
Parameter be designated as the parameter of predetermined section gas range, to realize range calibration.
According to gas detecting system provided by the utility model, when under test gas source 100 is connected to sensor group 200
When, carry out the detection under test gas；It is connected to sensor group 200 when zero point correction module 310 is passed through under test gas source 100
When, zero point correction can be carried out；When range calibration module 320 to be connected to sensor group 200, range calibration can be carried out.
During gas detection, system can be switched over by handover module 330, after carrying out zero point correction and range calibration,
Test mode is switched back to again.Due to having had both the calibration of zero and range point, the accuracy of gas detection data is improved.
In the present embodiment, handover module 330 is, for example, a kind of valve group module, and handover module 330 includes the first valve 331
With the second valve 332, the first valve 331 and the second valve 332 may each be three end solenoid valves.First valve 331 includes first
Input terminal NO, the second input terminal NC and output terminals A, the second valve 332 include input terminal A ', the first output end NO ' and the
Two output end NC ', under test gas source 100 are connected to the first input end NO of the first valve 331, and range calibration module 320 connects
To the second input terminal NC of the first valve 331, the output terminals A of the first valve 331 is connect with the input terminal A ' of the second valve 332,
First output end NO ' of the second valve 332 is connect with sensor group 200, the second output terminal NC ' and zero of the second valve 332
Calibration module 310 and sensor group 200 concatenate.
Gas detecting system may include test mode, zero point correction state and range calibration state.In test mode
Under, the first input end NO of the first valve 331 is connected to output terminals A and the second input terminal NC cut-offs, the input of the second valve 332
End A ' is connected to the first output end NO ' and second output terminal NC ' cut-offs；Under zero point correction state, the first of the first valve 331
Input terminal NO is connected to output terminals A and the second input terminal NC cut-offs, the input terminal A ' and second output terminal NC ' of the second valve 332
Connection and the first output end NO ' cut-offs；Under range calibration state, the second input terminal NC and the output terminals A of the first valve 331 connect
Logical and first input end NO cut-offs, the input terminal A ' of the second valve 332 is connected to the first output end NO ' and second output terminal NC '
Cut-off.The break-make combination respectively held by above-mentioned valve group, may be implemented the automatic calibration of zero and range point in gas detecting system
With switching.
The range calibration module 320 of the present embodiment includes calibrating gas source 321 and flowmeter bypass 322.Calibrating gas
Source 321 is connect with handover module 330, the pipe that flowmeter bypass 322 is arranged between calibrating gas source 321 and handover module 330
On the road.In the present embodiment, calibrating gas source 321 is connected to the second input terminal NC of the first valve 331, and flowmeter bypass 322 can
To be connected on the pipeline between calibrating gas source 321 and the second input terminal NC by the first three-way connector 323, calibrating gas
On the one hand gas in source 321 can be delivered to the second input terminal NC of the first valve 331, on the other hand lead to by the one or three
Fitting 323 enters flowmeter and bypasses 322, is discharged outside to after the flowmeter 324 in flowmeter bypass 322.
In addition, gas detecting system can also include exclusion device 400, sampling pump 500, pressure adjusting bypass 600 etc..It removes
Miscellaneous device 400 is connected between under test gas source 100 and alignment unit 300, for being pre-processed under test gas, e.g.
Except water process and dust removal process.Sampling pump 500 is connected between alignment unit 300 and sensor group 200, defeated for providing gas
The power that send and to gas sampling to be measured.In the present embodiment, the first output end NO ' of the second valve 332, zero point correction module
310 output end and sampling pump 500 is connected by the second three-way connector 340.Pressure adjusting bypass 600, which can be arranged, is adopting
On pipeline between sample pump 500 and sensor group 200.Pressure adjusting bypass 600 passes through third three-way connector in the present embodiment
700 are connected on the pipeline between sampling pump 500 and sensor group 200, on the one hand can be conveyed by the gas of sampling pump 500
For detecting in sensor group 200, it is discharged outside to after detection, is on the other hand entered by third three-way connector 700 and pressed
Power adjusts bypass 600, is discharged outside to after the pressure-regulating device 610 adjusted in bypass 600 through excess pressure, and wherein pressure is adjusted
The sample atmospheric pressure that pressure sensor in device 610 acquires sampling pump 500 is adjusted.
The utility model also provides a kind of gas detection method, by gas detecting system above-mentioned under test gas into
Row detection.Fig. 2 be the utility model embodiment gas detection method flow chart, gas detection method include step S01 extremely
Step S03.
In step S01, by handover module 330 by under test gas source 100 by zero point correction module 310 and sensor
200 connection of group, carries out zero point correction.Specifically, the step of zero point correction includes：By the first input end NO of the first valve 331
It is connected to output end and the second input terminal NC ends；The input terminal of second valve 332 is connected to and first with second output terminal NC '
Output end NO ' cut-offs so that under test gas enters sensor group 200 after zero point correction module 310.
In step S02, range calibration module 320 is connected to sensor group 200 by handover module 330, the amount of progress
Journey is calibrated.Specifically, the step of range calibration includes：Second input terminal NC of the first valve 331 is connected to and with output end
One input terminal NO cut-offs；The input terminal of second valve 332 is connected to and second output terminal NC ' cut-offs with the first output end NO ', is made
The calibrating gas obtained in range calibration module 320 enters sensor group 200.
In step S03, under test gas source 100 is connected to sensor group 200 by handover module 330, is treated
Survey the detection of gas.Specifically, include to the detecting step of under test gas：By the first input end NO of the first valve 331 with it is defeated
Outlet is connected to and the second input terminal NC cut-offs；The input terminal of second valve 332 is connected to the first output end NO ' and second exports
Hold NC ' cut-offs so that under test gas enters sensor group 200.In common gas detection scene, gas-detecting device is in
To in the pattern of gas detection to be measured, when being calibrated, step S01 and step S02, wherein step S01 can be carried out
It can individually carry out, can also sequentially carry out with step S02, can first carry out carrying out step S02 after step S01, it can also be into
Step S01 is carried out after row step S02, after completing calibration, is carried out step S03, is switched back to gas detection pattern.
According to gas detection method provided by the utility model, handover module 330 selectively by under test gas source 100 with
Sensor group 200 is connected to or under test gas source 100 is connected to sensor group 200 by zero point correction module 310 or will be measured
Journey calibration module 320 is connected to sensor group 200.When under test gas source 100 to be connected to sensor group 200, treated
Survey the detection of gas；When under test gas source 100 to be connected to by zero point correction module 310 with sensor group 200, can carry out
Zero point correction；When range calibration module 320 to be connected to sensor group 200, range calibration can be carried out.In gas detection mistake
Cheng Zhong can switch over system by handover module 330, after carrying out zero point correction and range calibration, be surveyed switching back to
Examination state.Due to having had both the calibration of zero and range point, the accuracy of gas detection data is improved.Handover module 330 includes
First valve 331 and the second valve 332, the first valve 331 and the second valve 332 such as three end solenoid valves, are respectively held by valve group
Break-make combination, the automatic calibration of zero and range point may be implemented in gas detecting system and switch.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (7)
1. a kind of gas detecting system, which is characterized in that including：
Under test gas source；
Sensor group is connect with the under test gas source；
Alignment unit is connected between the under test gas source and the sensor group；
Wherein, the alignment unit includes zero point correction module, range calibration module and handover module, the handover module choosing
The under test gas source is connected to the sensor group selecting property or the zero point correction mould is passed through into the under test gas source
Block is connected to the sensor group or is connected to the range calibration module with the sensor group.
2. gas detecting system as described in claim 1, which is characterized in that the handover module includes the first valve and second
Valve, first valve include first input end, the second input terminal and output end, second valve include input terminal,
First output end and second output terminal,
The under test gas source is connected to the first input end of first valve, and the range calibration module is connected to described
Second input terminal of one valve, the output end of first valve are connect with the input terminal of second valve, second valve
First output end of door is connect with the sensor group, the second output terminal of second valve and the zero point correction module with
And the sensor group concatenation.
3. gas detecting system as claimed in claim 2, which is characterized in that the gas detecting system include test mode,
Zero point correction state and range calibration state；
Under the test mode, the first input end of first valve is connected to output end and the second input terminal ends, institute
The input terminal for stating the second valve is connected to the first output end and second output terminal is ended；
Under the zero point correction state, the first input end of first valve is connected to output end and the second input terminal is cut
Only, the input terminal of second valve is connected to second output terminal and the first output end ends；
Under the range calibration state, the second input terminal of first valve is connected to output end and first input end is cut
Only, the input terminal of second valve is connected to the first output end and second output terminal is ended.
4. gas detecting system as described in claim 1, which is characterized in that the range calibration module includes：
Calibrating gas source is connect with the handover module；
Flowmeter bypasses, and is arranged on the pipeline between the calibrating gas source and the handover module.
5. gas detecting system as described in claim 1, which is characterized in that further include：
Exclusion device is connected between the under test gas source and the alignment unit.
6. gas detecting system as described in claim 1, which is characterized in that further include：
Sampling pump is connected between the alignment unit and the sensor group.
7. gas detecting system as claimed in claim 6, which is characterized in that further include：Pressure adjusts bypass, is arranged described
On pipeline between sampling pump and the sensor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821254193.3U CN207964796U (en) | 2018-08-06 | 2018-08-06 | Gas detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821254193.3U CN207964796U (en) | 2018-08-06 | 2018-08-06 | Gas detecting system |
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| CN207964796U true CN207964796U (en) | 2018-10-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111773832A (en) * | 2020-07-14 | 2020-10-16 | 中煤科工集团重庆研究院有限公司 | Gas pretreatment system with anti-turbulence and calibration functions |
| CN112730747A (en) * | 2020-12-25 | 2021-04-30 | 深圳市安室智能有限公司 | Gas detection method, system, gas analyzer and storage medium |
| CN112856230A (en) * | 2020-12-31 | 2021-05-28 | 杭州谱育科技发展有限公司 | Gas quantifying device and method based on quantifying ring |
| CN117310144A (en) * | 2023-11-28 | 2023-12-29 | 深圳市瑞利医疗科技有限责任公司 | Zero drift compensation method and device, expiration measurement equipment and storage medium |
-
2018
- 2018-08-06 CN CN201821254193.3U patent/CN207964796U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111773832A (en) * | 2020-07-14 | 2020-10-16 | 中煤科工集团重庆研究院有限公司 | Gas pretreatment system with anti-turbulence and calibration functions |
| CN112730747A (en) * | 2020-12-25 | 2021-04-30 | 深圳市安室智能有限公司 | Gas detection method, system, gas analyzer and storage medium |
| CN112856230A (en) * | 2020-12-31 | 2021-05-28 | 杭州谱育科技发展有限公司 | Gas quantifying device and method based on quantifying ring |
| CN117310144A (en) * | 2023-11-28 | 2023-12-29 | 深圳市瑞利医疗科技有限责任公司 | Zero drift compensation method and device, expiration measurement equipment and storage medium |
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