CN103163102B - A kind of gas measuring method, equipment and interference gas compensation device - Google Patents
A kind of gas measuring method, equipment and interference gas compensation device Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 259
- 230000008859 change Effects 0.000 claims description 34
- 238000004364 calculation method Methods 0.000 claims description 23
- 238000004458 analytical method Methods 0.000 claims description 8
- 238000002329 infrared spectrum Methods 0.000 claims description 7
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- 239000007789 gas Substances 0.000 abstract description 146
- 239000003463 adsorbent Substances 0.000 abstract description 10
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
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- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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Abstract
The invention discloses a kind of gas measuring method, equipment and interference gas compensation device, during being measured to tested gas, air progress school zero is extracted according to pre-defined rule to measure, and record the measurement result of school zero, according to the offset that the measurement result of school zero that imposes a condition determines this measurement period that meets of historical record, tested gas is extracted to measure, obtain the preliminary measurement results of the tested gas in this measurement period, the preliminary measurement results of tested gas using the offset of this measurement period to measuring compensate calculating, obtain measurement result after the compensation of tested gas.The present invention does not use adsorbent mode, but interference gas is compensated by obtaining interference gases affect minimum point in environment, and by the way of this calculates densimeter and compensated, to reduce influence of the environmental disturbances gas to tested gasmetry result.
Description
Technical field
The present invention relates to gasmetry and analysis, more particularly to a kind of gasmetry side to disturbing gas to be handled
Method, equipment and interference gas compensation device.
Background technology
Gas measurement technique based on NDIR spectrum analysis (NDIR, Non-Dispers ive Infrared) exists
A reference point is needed during measurement, to eliminate system drift error, generally to contain in air and the tested gas same type
Gas concentration be school zero reference point, with to be tested gas measurement result be corrected or compensate.But the gas contained in air
Body composition may be affected by environment and change, for example containing the increase of certain gas concentration, this is tested gas present in the air
During the gas increase that body phase is congruent, then the deviation of school zero reference point can be caused, so that cause the deviation of measurement result, formation pair
The interference of measurement result, therefore the gas of the tested gas identical component present in air is also referred to as interference gas.With dioxy
Change exemplified by carbon measurement, the concentration of carbon dioxide is by the factor such as number, measuring environment ventilation effect around measuring apparatus in air
Influence, is not constant value, and exists with the time and fluctuate, and also with fluctuation, effect is different for its influence to measurement result.In order to
The problem is solved, general way is to increase an adsorbent in the port of school zero of measuring apparatus, increase among environment for being absorbed
Plus interference gas.But this method there are problems that it is following some：1, different gas needs corresponding adsorbent different, when many gas
, it is necessary to which external multiple adsorbents, operability is not strong during bulk measurement；2, adsorbent has certain service life, it is necessary to periodically
Change, maintenance cost is higher；3, when big flow is applied, adsorbent can not fully absorb the interference gas in air.
The content of the invention
The present invention provides a kind of gas measuring method, equipment and interference gas compensation device, when measuring gas, does not pass through
Adsorbent mode and the interference gas in measuring environment is compensated, to reduce interference gas to being tested gasmetry result
Influence.
According to the first aspect of the invention there is provided a kind of gas measuring method, for based on infrared spectrum analysis to tested
Gas is measured, and methods described includes：
Air progress school zero is extracted according to pre-defined rule to measure, and records the measurement result of school zero；
According to the offset that the measurement result of school zero that imposes a condition determines this measurement period that meets of historical record；
Extract tested gas to measure, obtain the preliminary measurement results of the tested gas in this measurement period；
The preliminary measurement results of tested gas using the offset of this measurement period to measuring compensate calculating, obtain
Measurement result after the compensation of tested gas.
Wherein, according to the offset that the measurement result of school zero that imposes a condition determines this measurement period that meets of historical record
Including：Meeting to find out in the measurement result of school zero imposed a condition and represent the minimum number of interference gas concentration in historical record
According to, and using the data as this measurement period offset；Or measure and tie according to the school zero that imposes a condition of meeting of historical record
Fruit predicts the offset of this measurement period.
Gas compensation device is disturbed there is provided one kind according to the second aspect of the invention, for based on infrared spectrum analysis pair
The influence that the interference gas of tested gas is caused is compensated, and described device includes：School Z-operation unit, for according to pre- set pattern
Then control performs school Z-operation, and records the measurement result of school zero after the Z-operation of school；Offset determining unit, for according to history
What is recorded meets the offset that the measurement result of school zero imposed a condition determines this measurement period；Measurement result compensation calculation list
Member, the preliminary measurement results of the tested gas for the offset using this measurement period to being measured in this measurement period are mended
Repay measurement result after the compensation for calculating and obtaining tested gas.
In one embodiment, also including measurement result smooth unit, the measurement result smooth unit is used for using nearest
The preliminary measurement results of the tested gas of two obtained offsets respectively to being measured between two offset compensate meter
Calculate, obtain the saltus step of result of calculation twice, surveyed after the compensation of the tested gas measured according to the saltus step to current measurement cycle
Amount result is smoothed.
The present invention also provides a kind of gas measuring apparatus, for being measured based on infrared spectrum analysis to tested gas,
The equipment includes：
Reference channel, for by air or tested gas, exporting electric signal；
Measurement channel, for by air or tested gas, exporting electric signal；
Gasmetry module, the electric signal for receiving reference channel and Measurement channel output, obtains the measurement result of school zero
Or the preliminary measurement results of tested gas；And
Above-mentioned interference gas compensation device, the interference gas compensation device is used to lead to according to pre-defined rule control reference
Road and Measurement channel perform school Z-operation, and record each measurement result of school zero, and value is compensated according to historical record, use
Offset is compensated to the preliminary measurement results for being tested gas.
The present invention uses what this compensated to densimeter by obtaining interference gases affect minimum point in environment
Mode is compensated to interference gas, so as to reach the purpose of ambient concentration compensation, reduces interference gas to being tested gasmetry
As a result influence.This mode of the present invention need not change adsorbent, thus in terms of the maintenance than prior art in using absorption
The mode of agent is easier and low cost, and due to eliminating adsorbent, so that simplified on device structure, and this
The compensation scheme of invention is unrelated with the flow of tested gas, and when solving big flow and applying, adsorbent can not be fully absorbed greatly
The problem of interference gas in gas.
Brief description of the drawings
Fig. 1 is the block diagram of gas measuring apparatus in an embodiment of the present invention；
Fig. 2 is the block diagram of gas measuring apparatus in another embodiment of the invention；
Fig. 3 is gasmetry flow chart in an embodiment of the present invention；
Fig. 4 is the block diagram of gas measuring apparatus in another embodiment of the invention；
Fig. 5 is the smooth flow chart of gasmetry result in an embodiment of the present invention.
Embodiment
The present invention is described in further detail below by embodiment combination accompanying drawing.
In the embodiment of the present application, the change of gas is disturbed in gas measuring apparatus track record environment, and it is to surveying
Measure the influence of result, and error that environment causes to measurement result is judged according to the historical data of record and compensated, so that
Reach the purpose for improving measurement result accuracy.
In the embodiment of the present application, gas measuring apparatus according to pre-defined rule carry out school Z-operation, i.e. control device every
A period of time just extracts primary air from measuring environment, carries out school zero and measures, and records the measurement result of school zero, and these are recorded
History of forming data, represent interference gas concentration minimum in then being selected according to certain algorithm from the historical data of record
Data are used as offset.Disturbing the minimum explanation of gas concentration, now air is affected by environment minimum, also corresponds to interference gas
Abundant filtering has been carried out, therefore can effective compensation interference gas as offset using the minimum data of interference gas concentration are represented
Influence to being tested gas.
In the embodiment of the present application, once school Z-operation is often carried out, that is, determines an offset, next to tested
All compensated in the measurement that gas is carried out using the offset, until next school Z-operation, therefore in the embodiment of the present application,
Since this school Z-operation to next school Z-operation referred to as one measurement period, the offset that this school Z-operation is obtained
The referred to as offset of this measurement period, the measurement result of the tested gas measured for compensating in this measurement period, and next school
The offset that Z-operation is obtained is referred to as the offset of lower measurement period, the tested gas measured for compensating in next measurement period
Measurement result.
Embodiment one：
Refer to Fig. 1, in one embodiment, gas measuring apparatus 100 include reference channel 110, Measurement channel 120,
Gasmetry module 130 and interference gas compensation device 140.Reference channel 110 is used for by air or tested gas, output electricity
Signal.Due to reference channel selection be independently of the specific wavelength outside all gas absorbing wavelength, to measurement gas without absorption, its
The electric signal of output is steady state value, is not changed with tested gaseous species and type；Measurement channel 120 be used for by air or by
Gas is surveyed, electric signal is exported.Because Measurement channel selects the wavelength for gas absorption, for example with the optical filtering of specific wavelength
Piece only has absorption by the wavelength that can be absorbed by tested gas, the light of the wavelength to specific measurement gas, its telecommunications exported
Number change with the change of certain specific gas concentration；Imported in Measurement channel 120 after tested gas, it is special with tested gas
The light for having wavelength is absorbed, so that reduced through the luminous flux of Measurement channel 120 this light path, by photoelectric sensor by light
The change of flux is converted to the change of electricity, such as voltage signal or current signal.Gasmetry module 130 is led to for receiving reference
Road and the electric signal of Measurement channel output, obtain the preliminary measurement results of the measurement result of school zero or tested gas；Gas is disturbed to mend
Repaying device 140 is used to control reference channel and Measurement channel to perform school Z-operation according to pre-defined rule, and records each school zero
Measurement result, value is compensated according to historical record, and the preliminary measurement results for being tested gas are compensated using offset.
In one embodiment, as shown in figure 1, interference gas compensation device 140 includes school Z-operation unit 141, compensation
It is worth determining unit 142 and measurement result compensation calculation unit 143.School Z-operation unit 141 be respectively coupled to reference channel 110,
Measurement channel 120 and gasmetry module 130, offset determining unit 142 are coupled to school Z-operation unit 141, measurement result
Compensation calculation unit 143 is respectively coupled to offset determining unit 142 and gasmetry module 130.
School Z-operation unit 141 controls reference channel 110 and Measurement channel 120 to perform school Z-operation according to pre-defined rule,
I.e. control reference channel 110 and Measurement channel 120 extract the air in measuring environment, carry out school zero and measure, gasmetry module
130 carry out after school zero measures, calculating the measurement result of school zero in reference channel 110 and Measurement channel 120, and export and give the behaviour of school zero
Make unit 141, school Z-operation unit 141 records the measurement result of school zero after each school Z-operation, history of forming record.
In a kind of instantiation, school Z-operation unit 141 triggers school Z-operation according to time interval and temperature change, because
The structure of this school Z-operation unit 141 is as shown in Fig. 2 including record subelement 1411, timing subelement 1412 and temperature change
Computation subunit 1413, record subelement 1411 is used to record the measurement result of school zero, and timing subelement 1412 is used to detect current
The time interval of moment closest once school Z-operation, and output performs school Z-operation when time interval reaches setting time
Control signal to reference channel 110 and Measurement channel 120, the temperature change computation subunit 1413 is used to detect current temperature
The temperature variation of temperature during relative to the last school Z-operation is spent, output is performed after temperature variation exceedes the setting number of degrees
The control signal of school Z-operation is to reference channel 110 and Measurement channel 120.When timing subelement 1412 and temperature change calculate son
There is a control signal for meeting i.e. exportable execution school Z-operation during condition logical to reference channel 110 and measurement in unit 1413
Road 120, reference channel 110 and Measurement channel 120 extract air according to control signal, direct the air into reference channel 110 and survey
Passage 120 is measured, school zero is carried out and measures.
Certainly, according to present disclosure, it will be appreciated by those skilled in the art that in a further embodiment, school
Z-operation unit 141 can be triggered only according to time interval or temperature change not to be had in school Z-operation, i.e. school Z-operation unit 141
There are timing subelement 1412 or temperature change computing unit 1413.
Offset determining unit 142 is used to find out generation in the measurement result of school zero imposed a condition in meeting for historical record
Surface drying disturbs the minimum data of gas concentration, and using the data as this following measurement period offset.In a kind of specific reality
In example, using air respectively by the electrical parameter ratio that is obtained after reference channel and Measurement channel as ambient concentration characteristic value, then
School Z-operation unit 141 is using obtained ambient concentration characteristic value is as the measurement result of school zero and records, offset determining unit 142
The maximum in ambient concentration characteristic value is found out in record as offset.
Measurement result compensation calculation unit 143 is used for the offset using this measurement period to being measured in this measurement period
The preliminary measurement results of tested gas compensate calculatings, obtain being tested after the compensation of gas measurement result and export.
Based on above-mentioned gas measuring apparatus, based on infrared spectrum analysis to being tested method such as Fig. 3 institutes that gas is measured
Show, comprise the following steps：
Step S11, gas measuring apparatus carries out school Z-operation according to pre-defined rule.Gas measuring apparatus can be according to the time
Interval or temperature change control to carry out school Z-operation, i.e., carry out once school Z-operation at regular intervals, or temperature change surpasses
Cross and once school Z-operation is carried out after setting value.So that carbon dioxide is measured as an example, gas measuring apparatus according to ambient temperature and when
Between change, air can be extracted by certain rule (such as, with four degree of temperature change, the time is every the once school zero of triggering in two hours),
And as reference point, carry out school Z-operation.Once school Z-operation includes extracting air and directs the air into the He of reference channel 110
Measurement channel 120 carries out school zero and measured.
Step S12, records the measurement result of school zero.The characteristic value for being capable of reaction environment change in concentration, this feature are chosen in advance
Value can reflect that ambient concentration is fluctuated, and be influenceed by temperature, time change.School zero moment reference is chosen in the present embodiment to lead to
The voltage amplitude ratio of road and tested gas measurement passageway is as ambient concentration characteristic value, by the ambient concentration after being measured in school zero
Characteristic value is as the measurement result of school zero and records, the ambient concentration characteristic value history of forming record measured behind each school zero.Consider
Influenceed to the ambient concentration characteristic value by time and temperature, so when recording school zero simultaneously when recording ambient concentration characteristic value
The temperature and time at quarter, for weighing the change of ambient concentration.It should be appreciated by those skilled in the art that ambient concentration characteristic value is also
Can be tested gas measurement passageway and the voltage amplitude ratio of reference channel.In addition, if reference channel is surveyed with tested gas
Measure passage output is current value, and ambient concentration characteristic value can also be the electric current width of reference channel and tested gas measurement passageway
Spend ratio.
Step S13, determines offset.Using the history environment concentration feature value Q of storage as input, penalty coefficient is determined.Examine
It is fluctuation to consider disturb gas concentration in environment, is found out from historical data and represents the minimum number of interference gas concentration
According to, and the data are eliminated into influence of the gas to measurement result in environment as the offset of this measurement period.With carbon dioxide
Exemplified by measurement, if ambient concentration characteristic value is passed through equal to air by the voltage amplitude value divided by air obtained after reference channel
The voltage amplitude value obtained after Measurement channel, then represent the minimum data of the carbon dioxide concentration in air as in historical data most
Overall situation concentration feature value, ambient concentration characteristic value Q is bigger, illustrates that the gas concentration lwevel in environment is lower.Because environment is dense
Degree characteristic value is influenceed by temperature change and time change, if temperature and the Current Temperatures difference of certain school zero moment are larger,
Or certain school zero moment is oversize apart from current time interval, then the ambient concentration characteristic value recorded behind the school zero is to current survey
Measure reference significance less, in order to accelerate the speed for searching for offset, hunting zone can be reduced, so setting search condition, only exists
Scanned in the historical data for meeting search condition, such as search condition can be temperature conditionss, such as with current temperature
Centered on point, scan for, found out wherein in history environment concentration feature value (Q) ordered series of numbers for choosing ± 2 DEG C of scope memory storages
Maximum participate in follow-up concentration as offset and calculate, carry out environment benefit so as to realize and calculate result to carbon dioxide concentration
The purpose repaid.Search condition can also be time conditions, such as using the current time as reference, and time of measuring is the first two months
Ambient concentration characteristic value, is scanned in the ambient concentration characteristic value of the first two months, finds out maximum therein as benefit
Repay value.Search condition can also be the combination of temperature conditionss and time conditions, it is of course also possible to be carried out in whole historical datas
Search.
Step S14, after once school Z-operation is carried out, that is, starts the tested gasmetry of this measurement period.Gasmetry
Equipment extracts tested gas, and tested gas is imported into reference channel and Measurement channel is measured, is obtained in this measurement period
The preliminary measurement results of tested gas.One-shot measurement, preliminary measurement results only can be carried out to tested gas in this measurement period
There can be one；Tested gas can also be taken multiple measurements, there are multiple preliminary measurement results.Its measuring method can be using existing
There are technology or other technologies, here is omitted.
Step S15, using the offset of this measurement period to the preliminary surveying of the tested gas measured in this measurement period
As a result calculating is compensated, measurement result after the compensation of tested gas is obtained.Backoff algorithm can use prior art or other skills
Art, here is omitted.
When selecting offset using the present embodiment, over time with the change of environment temperature, the environment of storage is dense
Degree characteristic value is more, and the description fluctuated to ambient concentration is more detailed, can be obtained and be surveyed when disturbing gas concentration minimum by search
The ambient concentration characteristic value obtained is compensated as offset using the offset to the preliminary measurement results for being tested gas, to the greatest extent
Amount reduces the influence of the measurement result to being tested gas, therefore the present embodiment can be compensated preferably to measurement result.
Embodiment two：
When occurring school Z-operation, optimal ambient concentration characteristic value may be refreshed, that is, change offset, new compensation
Larger gap is there may be between value and former offset, the preliminary measurement results of follow-up tested gas use new offset
A saltus step is there may be after compensating calculating, the curve of tested gas abnormal saltus step is also occurred, the present embodiment is by increasing
Plus measurement result smooth unit 144 eliminates the abnormal saltus step.
As shown in figure 4, gas measuring apparatus 200 includes reference channel 210, Measurement channel 220, gasmetry module 230
With interference gas compensation device 240.Disturbing gas compensation device 240 includes school Z-operation unit 241, offset determining unit
242nd, measurement result compensation calculation unit 243 and measurement result smooth unit 244.Reference channel 210, Measurement channel 220, gas
Measurement module 230, school Z-operation unit 241, offset determining unit 242 and measurement result compensation calculation unit 243 can be with
Identical or different in embodiment one, measurement result smooth unit 244 is coupled to offset determining unit 242 and measurement result compensation
Computing unit 243.Measurement result smooth unit 244 is used for using two offsets obtained recently respectively in two offset
Between the preliminary measurement results of tested gas that measure compensate calculating, the saltus step of result of calculation twice is obtained, according to described
Measurement result is smoothed after the compensation for the tested gas that saltus step is measured to current measurement cycle.The jump of result of calculation twice
Become can be same preliminary measurement results be respectively adopted two offsets compensate calculate after difference or ratio, can also
Maximum in the compensation calculation carried out using first offset with the compensation calculation that is carried out using second offset
Maximum difference or ratio, can also be the minimum value in the compensation calculation carried out using first offset and use the
The difference or ratio of minimum value in the compensation calculation that two offsets are carried out.
In a kind of instantiation, measurement result smooth unit 14 is obtaining this measurement week from offset determining unit 242
After the offset of phase, the benefit of the tested gas obtained in previous measurement period is obtained from measurement result compensation calculation unit 243
Rear measurement result is repaid, and therefrom finds out the first maximum, by the preliminary surveying of the tested gas obtained in previous measurement period
As a result compensation calculation is re-started according still further to the offset of this measurement period, obtains measurement result after new compensation, in new benefit
Repay and the second maximum found out in rear measurement result, calculate difference between the first maximum and the second maximum absolute value or
Ratio, using the absolute value or ratio of difference as the saltus step of result of calculation twice, judges whether the saltus step exceedes given threshold,
If it is, being used as tested gas after measurement result after the compensation of tested gas is subtracted into the function that the saltus step decays with the time
Final output result and export.
Based on above-mentioned measurement result smooth unit, gas measuring apparatus carries out smooth side to the compensation result for being tested gas
Method is as shown in figure 5, comprise the following steps：
Step S21, starts new once school Z-operation, that is, starts a new measurement period.
Step S22, determines the offset of this measurement period.
Step S23, after the offset of this measurement period is obtained, the tested gas obtained in the previous measurement period of reading
Measurement result after compensation, and the first measurement result is found out after the compensation of previous measurement period in measurement result.Previous measurement
Measurement result is obtained using the offset A of previous measurement period after the compensation of the tested gas obtained in cycle, in one kind
In instantiation, the first measurement result is the first maximum Amax in measurement result after the compensation of previous measurement period.
Step S24, by the preliminary measurement results of the tested gas obtained in previous measurement period according still further to this measurement period
Offset B re-start compensation calculation, obtain measurement result after new compensation.
Step S25, finds out the second measurement result after new compensation in measurement result.In a kind of instantiation, the
Two measurement results are the first maximum Bmax in measurement result after new compensation.
Step S26, calculates the absolute value or ratio of the difference between the first measurement result and the second measurement result, by difference
Absolute value or ratio as result of calculation twice saltus step.For example, calculating Δ=| Bmax-Amax |, Amax and Bmax difference
Represent due to causing the saltus step of measurement result in school zero.(Bmax-Amax) value is preserved, and is compensated in follow-up calculating.
Step S27, judges whether the saltus step Δ exceedes given threshold, if it is, performing step S28, otherwise performs
Step S29.
Step S28, subtracts the saltus step by measurement result after the compensation of the tested gas in this measurement period and is declined with the time
The final output result of tested gas is used as after the function subtracted.In this measurement period, the offset B of this measurement period is determined
Afterwards, tested gas is measured, then preliminary measurement results is compensated using offset B and measure knot after being compensated
Really, it is the saltus step of reduction output result and last data, then measurement result after compensation is subtracted into the function that saltus step decays with the time
Export again afterwards, computational methods are:
VL=VM-f(Δ,t),
Wherein, VLFor final output result, VMCalculating is compensated using the offset B of this measurement period to be tested gas
Measurement result after compensation afterwards, f (Δ, t) be | Bmax-Amax | with the attenuation function of time, in a kind of instantiation, f
(Δ t) is exponentially decayed or straight line decay, for example with the time：F (Δ, n)=coff*f (Δ, n-1), wherein, coff is
Attenuation constant less than 1, f (Δ, initial value n) is | Bmax-Amax |, per iteration once, f (Δ, t) reduces once, so that
Ensure school zero before and after same concentration gas measurement keep it is constant, after certain time (such as 10s), be tested gasmetry result by
Gradual transition is to real measurement result.
Step S29, if saltus step is not above given threshold, using the offset B of this measurement period to being tested gas
Preliminary measurement results compensate calculating after be compensated rear measurement result, regard measurement result after compensation as tested gas
Final output result.
In a further embodiment, predict environment according to the measurement result of school zero that imposes a condition of meeting of historical record and become
Change, so as to predict the offset of this measurement period.
When multiple gases are measured simultaneously, can comprehensive one or more of gases situation of change, selection offset, from raising
The accuracy of offset.
The application is compensated using software approach to environmental disturbances gas, and Maintenance free greatly reduces the dimension of equipment
Protect cost.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this hair
Bright specific implementation is confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, the protection of the present invention should be all considered as belonging to
Scope.
Claims (15)
1. a kind of gas measuring method, for being measured based on infrared spectrum analysis to tested gas, it is characterised in that described
Method includes：
Air progress school zero is extracted according to time interval and/or temperature change to measure, and records the measurement result of school zero, by each school
The measurement result history of forming data of school zero measured after zero；
According to the offset that the measurement result of school zero that imposes a condition determines this measurement period that meets of historical record；
Extract tested gas to measure, obtain the preliminary measurement results of the tested gas in this measurement period；
The preliminary measurement results of tested gas using the offset of this measurement period to measuring compensate calculating, are tested
Measurement result after the compensation of gas.
2. the method as described in claim 1, it is characterised in that measure and tie according to the school zero that imposes a condition of meeting of historical record
Fruit determines that the offset of this measurement period includes：Find out in the measurement result of school zero imposed a condition in meeting for historical record
Represent the minimum data of interference gas concentration, and using the data as this measurement period offset.
3. method as claimed in claim 2, it is characterised in that described to extract air according to time interval and/or temperature change
Carry out school zero to measure, and record the measurement result of school zero and include：
The air of measuring environment is extracted once every gas measuring apparatus after setting time or the temperature change setting number of degrees；
The air of extraction is subjected to ratio computing by the electrical parameter values obtained after reference channel and Measurement channel respectively, ring is obtained
Border concentration feature value, using ambient concentration characteristic value is as the measurement result of school zero and records.
4. method as claimed in claim 3, it is characterised in that the ambient concentration characteristic value passes through reference channel equal to air
The voltage amplitude value divided by air obtained afterwards passes through the voltage amplitude value obtained after Measurement channel, the representative interference gas concentration
Minimum data are the maximum environment concentration feature value in historical data.
5. the method as described in claim 1, it is characterised in that record and measure at that time simultaneously when recording zero measurement result of school
Temperature and/or time, the measurement result of school zero imposed a condition that meets is temperature in historical record and/or time to meet setting
The measurement result of school zero of temperature and/or setting time.
6. method as claimed in claim 1 or 2, it is characterised in that also including measurement result smoothing step, the measurement result
Smoothing step includes：
Using two offsets obtained recently respectively to the preliminary surveying knot of the tested gas measured between two offset
Fruit compensates calculating, obtains the saltus step of result of calculation twice；
Measurement result is smoothed after the compensation of the tested gas measured according to the saltus step to current measurement cycle.
7. method as claimed in claim 6, it is characterised in that the tested gas measured according to the saltus step to current measurement cycle
The step of measurement result is smoothed after the compensation of body includes：
Judge whether the saltus step exceedes given threshold；
If it is, measurement result after the compensation of tested gas is subtracted after the function that the saltus step decayed with the time as tested
The final output result of gas.
8. method as claimed in claim 7, it is characterised in that using two offsets obtained recently respectively in two benefit
The preliminary measurement results for repaying the tested gas measured between value compensate calculating, wrap the step of the saltus step calculated twice
Include：
After the offset of this measurement period is obtained, measurement result after the compensation of the tested gas obtained in previous measurement period
In find out the first maximum；
By the preliminary measurement results of the tested gas obtained in previous measurement period according still further to this measurement period offset again
Calculating is compensated, measurement result after new compensation is obtained；
The second maximum is found out in measurement result after new compensation；
The absolute value or ratio of the difference between the first maximum and the second maximum are calculated, the absolute value of difference or ratio are made
For the saltus step of result of calculation twice.
9. one kind interference gas compensation device, for the influence caused based on infrared spectrum analysis to the interference gas for being tested gas
Compensate, it is characterised in that described device includes：
School Z-operation unit, is measured, and record school zero for extracting air progress school zero according to time interval and/or temperature change
Measurement result, by the measurement result history of forming data of school zero measured behind each school zero；
Offset determining unit, this measurement week is determined for the measurement result of school zero imposed a condition that meets according to historical record
The offset of phase；
Measurement result compensation calculation unit, for the offset using this measurement period to the tested gas that is measured in this measurement period
The preliminary measurement results of body compensate measurement result after the compensation for calculating and obtaining tested gas.
10. device as claimed in claim 9, it is characterised in that the school Z-operation unit includes being used to record the measurement of school zero
As a result record subelement, the school Z-operation unit also includes timing subelement and/or temperature change computation subunit, described
Timing subelement is used for the time interval for detecting current time closest once school Z-operation, and reaches setting in time interval
During the time output perform school Z-operation control signal, the temperature change computation subunit be used for detect Current Temperatures relative to
The temperature variation of temperature during the last school Z-operation, output performs school zero and grasped after temperature variation exceedes the setting number of degrees
The control signal of work.
11. device as claimed in claim 10, it is characterised in that air is passed through reference channel by the record subelement respectively
With the ambient concentration characteristic value obtained after Measurement channel is as the measurement result of school zero and records, offset determining unit is set meeting
Found out in the ambient concentration characteristic value of fixed condition and represent the minimum value of interference gas concentration as offset, the ambient concentration
Characteristic value is the electrical parameter ratio that reference channel and Measurement channel are exported.
12. device as claimed in claim 11, it is characterised in that the record subelement is same when recording zero measurement result of school
Shi Jilu measurement temperature at that time and/or time, the offset determining unit found out in historical record temperature and/or when
Between meet the measurement result of school zero that the measurement result of school zero of design temperature and/or setting time imposes a condition as meeting, and
Meet in the measurement result of school zero imposed a condition and find out maximum environment concentration feature value as offset.
13. the device as any one of claim 9-12, it is characterised in that also including measurement result smooth unit, institute
Stating measurement result smooth unit is used for using two offsets obtaining recently quilt respectively to being measured between two offset
The preliminary measurement results for surveying gas compensate calculating, obtain the saltus step of result of calculation twice, according to the saltus step to current survey
Measurement result is smoothed after the compensation for the tested gas that the amount cycle measures.
14. device as claimed in claim 13, it is characterised in that the measurement result smooth unit is used to obtain this measurement
After the offset in cycle, the first maximum is found out after the compensation of the tested gas obtained in previous measurement period in measurement result
Value, the offset by the preliminary measurement results of the tested gas obtained in previous measurement period according still further to this measurement period enters again
Row compensation calculation, obtains measurement result after new compensation, finds out the second maximum in measurement result after new compensation, calculates
The absolute value or ratio of difference between first maximum and the second maximum, using the absolute value or ratio of difference as counting twice
The saltus step of result is calculated, whether judges the saltus step more than given threshold, if it is, by measurement result after the compensation of tested gas
Subtract after the function that the saltus step decays with the time as the final output result for being tested gas.
15. a kind of gas measuring apparatus, for being measured based on infrared spectrum analysis to tested gas, it is characterised in that described
Equipment includes：
Reference channel, for by air or tested gas, exporting electric signal；
Measurement channel, for by air or tested gas, exporting electric signal；
Gasmetry module, for receive reference channel and Measurement channel output electric signal, obtain the measurement result of school zero or by
Survey the preliminary measurement results of gas；
Interference gas compensation device as any one of claim 9-14, the interference gas compensation device be used for according to
Pre-defined rule controls reference channel and Measurement channel to perform school Z-operation, and records each measurement result of school zero, according to history
Record is compensated value, and the preliminary measurement results for being tested gas are compensated using offset.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110408156.XA CN103163102B (en) | 2011-12-09 | 2011-12-09 | A kind of gas measuring method, equipment and interference gas compensation device |
| PCT/CN2012/085975 WO2013083046A1 (en) | 2011-12-09 | 2012-12-05 | Gas measurement method, device and interfering gas compensation device |
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| CN201110408156.XA CN103163102B (en) | 2011-12-09 | 2011-12-09 | A kind of gas measuring method, equipment and interference gas compensation device |
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| CN103163102B true CN103163102B (en) | 2017-07-18 |
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| CN106248584A (en) * | 2016-06-29 | 2016-12-21 | 深圳市怀睿科技有限公司 | A kind of method and system improving gas concentration accuracy of detection |
| CN107990512B (en) * | 2017-11-17 | 2021-03-19 | 艾欧史密斯(中国)热水器有限公司 | Air conditioning equipment and formaldehyde detection method and device thereof |
| CN109960817B (en) * | 2017-12-22 | 2023-08-15 | 中核核电运行管理有限公司 | Online tritium measurement method based on sequential measurement dynamic error calculation method |
| CN110021137A (en) * | 2019-03-28 | 2019-07-16 | 赛特威尔电子股份有限公司 | A kind of smog alarm method, apparatus, smoke alarm device and storage medium |
| CN110286093B (en) * | 2019-07-17 | 2020-04-17 | 中南大学 | Method for detecting gas concentration in glass bottle with dynamically adjusted threshold value |
| CN113125341B (en) * | 2019-12-30 | 2023-09-29 | 上海禾赛科技有限公司 | Gas telemetry method and device based on multispectral imaging technology |
| CN111283194B (en) * | 2020-02-06 | 2022-03-22 | 山东云则信息技术有限公司 | Computer control method of intelligent manufacturing system |
| CN115128027B (en) * | 2022-07-29 | 2023-09-19 | 中煤科工集团沈阳研究院有限公司 | Ultraviolet spectrum-splitting gas sensor environment pressure compensation structure and method |
| 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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| CN103163102A (en) | 2013-06-19 |
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