CN104374880B - Trace moisture sensor calibration method and on-line calibration device - Google Patents
Trace moisture sensor calibration method and on-line calibration device Download PDFInfo
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- CN104374880B CN104374880B CN201410663397.2A CN201410663397A CN104374880B CN 104374880 B CN104374880 B CN 104374880B CN 201410663397 A CN201410663397 A CN 201410663397A CN 104374880 B CN104374880 B CN 104374880B
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Abstract
The invention provides a trace moisture sensor calibration method. The method comprises the following steps: by using a change value of the content of moisture in a closed space as a theoretical value and using a reading value of a trace moisture sensor connected with the closed space as a measurement value, comparing the measurement value with a theoretical value to finish the calibration of the trace moisture sensor. The invention further provides an on-line trace moisture sensor calibration device. Through the adoption of the new calibration method provided by the invention, the on-line calibration of the trace moisture sensor can be conveniently realized without using other calibration instruments, the calibration can be performed any time any where, the condition is simplified, and the implementation is convenient.
Description
Technical field
The present invention relates to water analysis field, more particularly, to a kind of trace moisture sensor scaling method and on-line proving dress
Put.
Background technology
In gas, water content detecting sensor is widely used in the industries such as lithium electricity, nuclear energy, medical science, and these fields usually relate to
And arrive some processing steps extremely sensitive to moisture, need to build anhydrous time-sharing environment in a confined space or contain moisture
Amount is limited in a less scope, therefore moisture content range is had high requirements, the precision also phase to moisture transducer
Propose very high request with answering.
The moisture transducer being fixed on equipment and instrument usually needs to demarcate, to guarantee its accuracy it is ensured that normal use.
But the present demarcation to moisture transducer, it is often necessary to sensor takes out from equipment detection of comparing again, then will again
Moisture transducer is installed and is gone back, so not only time-consuming trouble, and is possible to the precision of the impact sensing instrument in dismounting and installation,
Or cause to damage.
Content of the invention
It is an object of the invention to overcome the shortcomings of prior art exist, provide a kind of moisture transducer scaling method and
Line caliberating device, realizes the on-line proving of moisture transducer, simple and convenient, rapid and convenient.
For reaching above-mentioned purpose, the technical scheme is that：A kind of trace moisture sensor scaling method, with confined air
The changing value of interior moisture is theoretical value, with the reading of trace moisture sensor that is connected with confined space as measured value,
Measured value is contrasted thus completing the demarcation of trace moisture sensor with theoretical value.
Wherein, by the reference injection known volume confined space of known volume, the moisture in confined space becomes
Change formula calculates, and is theoretical value；Reading in trace moisture sensor is measured value；By theoretical value and measured value phase
Relatively, you can complete the demarcation to trace moisture sensor.
For, gas reference, described formula is Δ Ct=Cs × Vs/Vg；
Wherein, Δ Ct is the theoretical value of moisture content change in confined space；
Cs is the moisture in reference；
Vs is the amount of the reference of injection；
Vg is the volume of confined space.
For liquid reference, described formula is
Wherein, Δ Ct is the theoretical value of moisture content change in confined space；
Ms is the moisture in reference；
It is the density of reference；
Vs is the volume of the reference of injection；
Mw is the molecular weight of water；
Vm is molar volume of gas；
Vg is the volume of confined space.
The present invention also provides a kind of trace moisture sensor on-line proving device, for single or multiple in confined space
The quantitative reference of injection, described trace moisture sensor on-line proving device is provided with injection port and outlet, described outlet
It is tightly connected with described confined space, described trace moisture sensor on-line proving device also includes：
Reference locker room, is connected with described injection port, for extracting and storing quantitative reference；
Reference transporter, for being transported to the reference in described reference locker room in confined space；
Reference generating means, for generating the reference of concentration known, described reference generating means and described reference
Sample locker room connects.
One embodiment of the present invention is that described reference transporter includes：Perfusor piston, including piston rod and
It is arranged at two piston plates on piston rod, described two piston plates are mated with reference locker room inner wall sealing, described two
Piston plate and reference store extraction and the memory space that chamber interior walls form quantitative reference；
Reference locker room, one end open is arranged in confined space as outlet, and the other end is given birth to described reference
Become device series connection or be integrally formed, its inner wall size is mated with the sealing of described two piston plates, the length of described reference locker room
Degree is more than or equal to the distance between two piston plates.
Also can optionally configuration driven device, for promoting perfusor piston movement to transport the ginseng in described memory space
Compare sample.
Another embodiment of the present invention is that described reference transporter includes：Perfusor piston, including piston rod and
It is arranged at the piston plate on piston rod, described piston plate is mated with reference locker room inner wall sealing, described piston plate and reference
Sample stores extraction and the memory space of the quantitative reference of chamber interior walls composition；
The other end of described reference locker room is connected with described outlet, and described injection port and outlet are provided with list
To valve, when piston plate is located at reference locker room bottom or is moved to reference locker room bottom from outlet end, sample introduction
Mouth one-way cock is opened, and outlet one-way cock is closed simultaneously；When piston plate is moved from air storage tank bottom to outlet,
Injection port one-way cock is closed, and outlet one-way cock is opened simultaneously.
Also can optionally configuration driven device, for promoting perfusor piston movement to transport the ginseng in described memory space
Compare sample.
Another embodiment of the present invention is, described reference locker room includes reference batcher, reference entrance, front
Level three-way valve, reference outlet, rear class three-way valve；Described prime three-way valve outlet and described reference batcher one end
Connection, the other end of described reference batcher and described rear class three-way valve inlet communication, one of described rear class triple valve
Outlet is connected with the inlet valve of confined space, and another of described rear class three-way valve exports and reference outlet, institute
An entrance stating prime three-way valve is connected with reference entrance；
Described reference transporter includes inert gas pumping plant and inert gas entrance, described inert gas entrance and institute
Another entrance stating prime three-way valve connects；
The entrance of described confined space is provided with valve.
Another embodiment of the present invention is that described trace moisture sensor on-line proving device also includes reference import
Valve and reference outlet valve, described reference imported valve is connected with reference storage device with reference outlet valve
Connect.
The trace moisture sensor on-line proving device of the present invention all may be installed on glove box, to measure Glove box body
Interior moisture.
The present invention also provides a kind of glove box, and described glove box is provided with foregoing trace moisture sensor and marks online
Determine device.
The operation principle of reference generating means is as follows：Gas reference generates, in the closed container equipped with water, as long as
Pressure in space, temperature are certain, and in headspace gases, the partial pressure of moisture just may be calculated and draws or check in, on Accurate Determining
The pressure and temperature in portion space, or ensure pressure, temperature necessarily it is possible to obtain reference known to moisture；Liquid is joined
Than sample can be pure water or with other liquid dilutings to a certain proportion of aqueous solution.
Compared with prior art, the present invention achieves following beneficial effect：
1st, the present invention can generate standard sample or reference online, without outsourcing standard sample or reference.
2nd, the present invention easily achieves the on-line proving of trace moisture sensor it is not necessary to use other marking apparatus
Device, it is achieved thereby that can be carried out whenever and wherever possible demarcating, simplified condition, convenient enforcement.
3rd, the present invention proposes a kind of new scaling method it is not necessary to remove sensor it is not required that examining and determine by other
Instrument, only be can be calibrated with sensor itself reading, thus not subject to conditions, reduce instrument maintenance cost.
Brief description
Fig. 1 a is structural representation when embodiment 1 is closed, and Fig. 1 b is structural representation when embodiment 1 is opened；Wherein,
1 is confined space to be measured, and 23 is reference locker room, and 27 is outlet, and 28 is injection port, and 3 is reference generating means, 24
It is piston rod, 52 and 53 is two piston plates, and 6 is cylinder.
Fig. 2 a is structural representation when embodiment 2 trace moisture sensor on-line proving device is closed, and Fig. 2 b is micro
Structural representation when moisture transducer on-line proving device is opened；Wherein, 1 is confined space；21 is piston plate；22 is sample
Mouth one-way cock；23 is reference locker room；24 is piston rod；25 is reference injection port；26 is injection port one-way cock.
Fig. 3 is the structural representation of embodiment 3；Wherein, 1 is confined space；41 is prime three-way valve；42 is reference
Batcher；43 is rear class three-way valve；44 is inert gas entrance；45 is reference entrance；46 is reference outlet；After 47 are
Level three-way valve leads to the outlet between confined space valve；48 is confined space inlet valve.
Fig. 4 a is structural representation when embodiment 4 is closed, and Fig. 4 b is structural representation when embodiment 4 is opened；Wherein,
1 is confined space to be measured, and 23 is reference locker room, and 52 and 53 is two piston plates, and 71 is reference imported valve, and 72 are
Reference outlet valve.
Specific embodiment
With reference to specific embodiment, technical scheme is further described, but the present invention is not limited to this
A little embodiments.
Embodiment 1,
A kind of trace moisture sensor caliberating device, device close when structure as shown in Figure 1a, including reference locker room
23, outlet 27, injection port 28, reference generating means 3, piston rod 24, two piston plates 52 and 53, cylinder 6.Wherein, two
Form certain volumetric spaces between individual piston plate 52,53 and reference locker room 23, the gas of certain volume amount can be sealed up for safekeeping；
Cylinder 6 controls piston rod 24 to move in reference locker room 23, realizes opening and closing.
The trace moisture sensor caliberating device of embodiment 1 is installed on glove box, then to being similarly installed at gloves
Trace moisture sensor on case is demarcated.
Reference generating means are used for generating the aqueous gas of concentration known.
As Fig. 1 a, when cylinder 6 is not ventilated, micro-moisture on-line proving device is closed, reference locker room
23 are connected with reference generating means 3, the internal isolation with Glove box body；Ventilation makes cylinder 6 open, and promotes piston rod 24 to exist
It is moved upward to unlatching maximum rating, such as Fig. 1 b, now reference locker room 23 is connected with glove box in reference locker room 23
Logical, be isolated with reference generating means 3, so a certain amount of aqueous gas, that is, reference just by from injection port through outlet
It is incorporated in glove box, complete single injected sampling.Can sample introduction repeatedly, number of injections n.
Glove box volume Vg may be calculated and obtains, and moisture Cs of reference is it is known that within reference locker room 23
Volume VDepositIt is a fixed value, Vs=n × VDeposit, so the moisture theory ascending amount Δ Ct introducing reference formation can calculate
Draw：
Δ Ct=Cs × Vs/Vg
Wherein, Δ Ct is the theoretical value of moisture content change in confined space；
Cs is the moisture in reference；
Vs is the amount of the reference of injection；
Vg is the volume of confined space.
Data before and after introducing reference for the trace moisture sensor on record glove box, calculates micro-moisture and passes simultaneously
Variation delta Cw of reading on sensor, then in more theoretical ascending amount Δ Ct and trace moisture sensor, whether variation delta Cw
Unanimously, if two data unanimously illustrate that trace moisture sensor is accurate, if difference larger explanation sensor goes wrong.
In order to improve the accuracy of demarcation, different volumes reference sample can also be injected and carry out multi-point calibration, or carry out
Repeated multiple times demarcation.
In the present embodiment, also can not use cylinder, and adopt other modes to drive, such as manually, electrically etc..
Embodiment 2
A kind of trace moisture sensor on-line proving device, including reference storage room and reference transporter, structure
As shown in Figure 2 a and 2 b.Fig. 2 a is state when device is closed, and Fig. 2 b is state when device is opened.
Perfusor piston, including piston rod 24 and the piston plate 21 being arranged on piston rod, piston plate 21 and reference storage
Deposit room 23 inner wall sealing coupling, the extraction of piston plate 21 and the quantitative reference of reference storage room 23 inwall composition and storage are empty
Between；
The other end of reference locker room 23 is connected with outlet, and reference injection port 25 and reference generating means 3 are even
Logical, reference injection port 25 and outlet are provided with one-way cock, when piston plate 21 be located at reference locker room bottom or by
To when moving reference locker room bottom, injection port one-way cock 26 is opened, and outlet one-way cock 22 closes simultaneously at outlet end
Close；When piston plate 21 is moved from reference locker room bottom to outlet, injection port one-way cock 26 is closed, simultaneously outlet
One-way cock 22 is opened, and completes single injected sampling.
Also can configuration driven device as needed, for promoting perfusor piston movement to transport in air reservoir
Certain amount of air.
Likewise, volume Vg of confined space may be calculated and obtains, in reference, moisture Cs can be by temperature and pressure
Calculate, volumetric spaces Vs within reference locker room 23 are fixed values, so the moisture introducing reference formation contains
The theoretical ascending amount Δ Ct of amount can calculate：
Δ Ct=Cs × Vs/Vg
Data before and after introducing reference for the trace moisture sensor on record confined space, calculates micro-moisture simultaneously
Variation delta Cw of reading on sensor, then whether more theoretical ascending amount Δ Ct is consistent with variation delta Cw on sensor,
If two data unanimously illustrate that trace moisture sensor is accurate, if difference larger explanation sensor goes wrong.
In order to improve the accuracy of demarcation, different volumes reference sample can also be injected and carry out multi-point calibration, or carry out
Repeated multiple times demarcation.
Embodiment 3
A kind of trace moisture sensor on-line proving device, including reference locker room and reference transporter.
Reference locker room includes reference batcher 42, reference entrance 45, prime three-way valve 41, reference outlet
46th, rear class three-way valve 43, the outlet of prime three-way valve is connected with reference batcher one end, the other end of reference batcher
With rear class three-way valve inlet communication, the one outlet of rear class three-way valve connected with the inlet valve of confined space 1, rear class three
Another outlet of port valve door is connected with reference outlet 46, and an entrance of prime three-way valve is with reference entrance 45 even
Logical, another entrance of prime three-way valve is connected with inert gas entrance 44；Reference entrance 45 and reference generating means 3
Connection.
Reference transporter includes inert gas pumping plant 441 and inert gas entrance 44, inert gas entrance 44 with front
Another entrance of level three-way valve connects；
The entrance of confined space is provided with inlet valve 48.
When sensor needs to demarcate, the reference entrance 45 of prime three-way valve 41 is controlled to open, inert gas entrance
44 closings, control the reference outlet of rear class three-way valve 43 46 to open, the valve 48 of connection confined space is closed, and allow reference
Full of reference batcher 42；Then the reference entrance 45 of prime three-way valve 41 is controlled to close, inert gas entrance 44 dozens
Open, control reference outlet 46 closing of rear class three-way valve 43, the valve 48 of connection confined space is opened, and allows reference to enter
Confined space 1, completes single injected sampling；Sample introduction can be multiple；Reference batcher 42 specification size can be multiple, and plurality of specifications can
With simultaneously using the different sample introduction accuracy requirement of satisfaction.
Embodiment 4
A kind of trace moisture sensor caliberating device, device close when structure as shown in fig. 4 a, in reference locker room 23
On be connected with reference imported valve 71 and reference outlet valve 72, the reference imported valve other end can connect reference life
Become device (in figure is not drawn into).
When trace moisture sensor needs to demarcate, reference imported valve 71 is opened, and reference outlet valve 72 is closed,
Reference is allowed to be full of reference locker room；Piston moves up, and reference is pushed in confined space such as Glove box body；Then
Reference imported valve is closed, and reference outlet valve is opened, and completes single injected sampling；Sample introduction can be multiple.
The scaling method of the present invention is it is not necessary to remove sensor it is not required that examining and determine instrument by other, only to sense
Device itself reading can be calibrated, thus not subject to conditions, reduce instrument maintenance cost.The present invention easily achieves
The on-line proving of trace moisture sensor is it is not necessary to use other calibrating instruments, it is achieved thereby that can be carried out whenever and wherever possible
Demarcate, simplified condition, convenient enforcement.
Above-described is only the preferred embodiment of the present invention it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, some deformation can also be made and improve, these broadly fall into the present invention
Protection domain.
Claims (8)
1. a kind of trace moisture sensor scaling method is it is characterised in that described trace moisture sensor scaling method is with close
The changing value closing moisture in space is theoretical value, with the reading of trace moisture sensor that is connected with confined space for measuring
Value, measured value is contrasted thus completing the demarcation of trace moisture sensor with theoretical value；
The reference of known volume is injected in known volume confined space, the formula meter of the moisture content change in confined space
Draw, be theoretical value；Reading in trace moisture sensor is measured value；Theoretical value is compared with measured value, you can
Complete the demarcation to trace moisture sensor；
For gas reference, described formula is Δ Ct=Cs × Vs/Vg；
Wherein, Δ Ct is the theoretical value of moisture content change in confined space；
Cs is the moisture in reference；
Vs is the amount of the reference of injection；
Vg is the volume of confined space；
For liquid reference, described formula is Δ Ct=(Ms ρsVs/Mw)×Vm/Vg；
Wherein, Δ Ct is the theoretical value of moisture content change in confined space；
Ms is the moisture in reference；
ρsIt is the density of reference；
Vs is the volume of the reference of injection；
Mw is the molecular weight of water；
Vm is molar volume of gas；
Vg is the volume of confined space.
2. a kind of trace moisture sensor on-line proving device, for the reference quantitative to injections single or multiple in confined space
Sample, described trace moisture sensor on-line proving device is provided with injection port and outlet, described outlet and described confined space
It is tightly connected, described trace moisture sensor on-line proving device also includes：
Reference locker room, is connected with described injection port, for extracting and storing quantitative reference；
Reference transporter, for being transported to the reference in described reference locker room in confined space；
Reference generating means, for generating the reference of concentration known, described reference generating means and described reference are deposited
Storage chamber connects；
Volume Vg of confined space may be calculated and obtains, and in reference, moisture Cs can be drawn by temperature and calculation of pressure, ginseng
Than sample locker room, internal volumetric spaces Vs are fixed values, so introducing the moisture theory ascending amount Δ that reference is formed
Ct can calculate：
Δ Ct=(Ms ρ sVs/Mw) × Vm/Vg；
Wherein, Δ Ct is the theoretical value of moisture content change in confined space；
Ms is the moisture in reference；
ρ s is the density of reference；
Vs is the volume of the reference of injection；
Mw is the molecular weight of water；
Vm is molar volume of gas；
Vg is the volume of confined space；
Data before and after introducing reference for the trace moisture sensor on record confined space, calculates micro-moisture sensing simultaneously
Variation delta Cw of reading on device, then whether more theoretical ascending amount Δ Ct is consistent with variation delta Cw on sensor, if
Two data unanimously illustrate that trace moisture sensor is accurate, if difference larger explanation sensor goes wrong.
3. trace moisture sensor on-line proving device as claimed in claim 2 is it is characterised in that the transhipment of described reference fills
Put including：Perfusor piston, including piston rod and two piston plates, described two piston plates and the reference being arranged on piston rod
Sample locker room inner wall sealing coupling, described two piston plates and reference store the extraction of the quantitative reference of chamber interior walls composition and deposit
Storage space；
Reference locker room, one end open is arranged in confined space as outlet, and the other end generates dress with described reference
Put series connection or be integrally formed, its inner wall size is mated with the sealing of described two piston plates, and the length of described reference locker room is big
In or be equal to the distance between two piston plates.
4. trace moisture sensor on-line proving device as claimed in claim 2 is it is characterised in that the transhipment of described reference fills
Put including：Perfusor piston, including piston rod and the piston plate being arranged on piston rod, described piston plate and reference locker room
Inner wall sealing mates, and described piston plate and reference store extraction and the memory space that chamber interior walls form quantitative reference；
The other end of described reference locker room is connected with described outlet, and described injection port and outlet are provided with check valve
Door, when piston plate is located at reference locker room bottom or is moved to reference locker room bottom from outlet end, injection port list
To valve opening, outlet one-way cock closing simultaneously；When piston plate is moved from reference storage room bottom to outlet, enter
Sample mouth one-way cock is closed, and outlet one-way cock is opened simultaneously.
5. trace moisture sensor on-line proving device as claimed in claim 2 is it is characterised in that described reference locker room
Including reference batcher, reference entrance, prime three-way valve, reference outlet, rear class three-way valve；Described prime threeway
Valve export is connected with described reference batcher one end, the other end of described reference batcher and described rear class three-way valve
Inlet communication, the described one outlet of rear class three-way valve is connected with the inlet valve of confined space, described rear class three-way valve
Another outlet and reference outlet, an entrance of described prime three-way valve connected with reference entrance；
Described reference transporter includes inert gas pumping plant and inert gas entrance, described inert gas entrance with described before
Another entrance of level three-way valve connects；
The entrance of described confined space is provided with valve.
6. trace moisture sensor on-line proving device as claimed in claim 2 is it is characterised in that described micro-moisture senses
Device on-line proving device also includes reference imported valve and reference outlet valve, described reference imported valve and reference
Outlet valve is connected with reference storage device.
7. described trace moisture sensor on-line proving device as arbitrary in claim 2～6 is it is characterised in that described micro
Moisture transducer on-line proving device is arranged on glove box.
8. a kind of glove box is it is characterised in that described micro-moisture arbitrary just like claim 2～6 installed by described glove box
Sensor on-line proving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663397.2A CN104374880B (en) | 2014-11-19 | 2014-11-19 | Trace moisture sensor calibration method and on-line calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410663397.2A CN104374880B (en) | 2014-11-19 | 2014-11-19 | Trace moisture sensor calibration method and on-line calibration device |
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| Publication Number | Publication Date |
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| CN104374880B true CN104374880B (en) | 2017-02-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11125629A (en) * | 1997-10-22 | 1999-05-11 | Shimadzu Corp | Water quality analyzer |
| GB2362217B (en) * | 2000-05-11 | 2004-07-07 | Zellweger Analytics Ltd | Gas sensor calibration system |
| CN102778541B (en) * | 2012-08-07 | 2015-01-07 | 无锡市尚沃医疗电子股份有限公司 | Device and method for calibrating gas sensor |
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Address after: Suzhou Industrial Park Suzhou city Jiangsu province 215026 Xinglin Street No. 78 emerging industrial square No. 2 Factory Applicant after: VIGOR GAS PURIFICATION TECHNOLIGIES, Inc. Address before: Suzhou Industrial Park Suzhou city Jiangsu province 215026 Xinglin Street No. 78 emerging industrial square No. 2 Factory Applicant before: Vigor Gas Purification Equipment Technologies (Suzhou Industrial Park) Co.,Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: VIGOR GAS PURIFICATION EQUIPMENT TECHNOLOGIES (SUZHOU INDUSTRIAL PARK) CO., LTD. TO: VIGOR GAS PURIFICATION TECHNOLOGY (SUZHOU) CO., LTD. |
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Address after: No. 58, Tingtao Road, Suzhou Industrial Park, Jiangsu 215000 Patentee after: Weige Technology (Suzhou) Co.,Ltd. Address before: 215026 No.2 workshop, Xinxing Industrial Park, 78 Xinglin street, Suzhou Industrial Park, Jiangsu Province Patentee before: VIGOR GAS PURIFICATION TECHNOLIGIES, Inc. |