CN104425044A - Measurement method of hydrogen concentration by using two different sensors - Google Patents
Measurement method of hydrogen concentration by using two different sensors Download PDFInfo
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- CN104425044A CN104425044A CN201410424526.2A CN201410424526A CN104425044A CN 104425044 A CN104425044 A CN 104425044A CN 201410424526 A CN201410424526 A CN 201410424526A CN 104425044 A CN104425044 A CN 104425044A
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 146
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 146
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 238000000691 measurement method Methods 0.000 title 1
- 239000007789 gas Substances 0.000 claims abstract description 45
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 45
- 239000004065 semiconductor Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000009021 linear effect Effects 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000006555 catalytic reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012888 cubic function Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical compound [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4073—Composition or fabrication of the solid electrolyte
- G01N27/4074—Composition or fabrication of the solid electrolyte for detection of gases other than oxygen
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/005—H2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention relates to a method for measuring a hydrogen concentration using two kinds of sensors, and more particularly, to a method for measuring a hydrogen concentration using two kinds of sensors, capable of blocking the leakage of air contaminated by radiation generated by a sampling method by directly installing a sensor module composed of a hydrogen sensor of a heat catalytic method and a semiconductor type gas sensor in reactor containment, minimizing an auxiliary apparatus required for a hydrogen sensing apparatus, and measuring hydrogen gas of a high concentration. According to the present invention, safety measures are quickly taken by quickly and safely measuring the high hydrogen concentration generated in the reactor containment in an accident in real time.
Description
Technical field
The present invention relates to a kind of method utilizing two kinds of sensors to measure hydrogen concentration, more specifically relate to and a kind of the sensor assembly be made up of thermocatalysis hydrogen sensor and semiconductor gas sensor is set directly at nuclear reactor vessel inside, make up the shortcoming of the thermocatalysis mode being difficult to carry out high concentration hydrogen mensuration, thus measure nuclear reactor major accident time contingent high concentration hydrogen method.
Background technology
The Fukushima nuclear accident in March, 2011 is due to large-scale tsunami, and power supply supply is interrupted and loses nuclear fuel refrigerating function, thus the temperature of nuclear fuel rises to thousands of degree and reacts with the water vapor of surrounding, produces the example that a large amount of hydrogen finally causes large-scale explosion accident.
Fig. 1 be schematically represent in the past for measuring and monitoring the figure of the hydrogen watch-dog of the hydrogen concentration in nuclear reactor vessel, illustrate at nuclear reactor vessel 10 inside collection air (air), measure hydrogen concentration contained in the air gathered in the hydrogen analytical equipment 20 of outside after, by monitoring cabinet 30, the signal value for measured hydrogen concentration is transferred to main control room 40, it is inner that the air taked again drops into nuclear reactor vessel 10 after mensuration hydrogen concentration.But, described technology is in order to externally draw the air of nuclear reactor vessel 10 inside, need the pipeline passed through for air, and separately establish the device etc. for analyzing sampled air at the outside need of nuclear reactor vessel 10, due to these characteristics, there is structure and become complicated and the problem of equipment making expense increase.And, in the conventional art of described Fig. 1, there is the radiomaterial of nuclear reactor vessel inside likely by running through the problem of the pipe leakage of nuclear reactor vessel inside and outside, there is the problem of the real-time change that can not detect hydrogen concentration because of sample mode, and exist when sampling pipe frosting, hydrogen liquefies because of moisture etc., thus is difficult to the problem accurately calculating hydrogen concentration.
No. 10-1269510th, Korean granted patent (authorization date: 2013.05.24) relates to a kind of hydrogen detecting sensor that can measure hydrogen concentration, it is characterized by, and is correspondingly changed detect hydrogen concentration by the concentration change of Resistance Value and hydrogen.But, utilize a hydrogen test section to detect hydrogen in described technology, therefore there is the problem suitably can not tackling the hydrogen concentration of described hydrogen test section exception or situation about breaking down or high concentration.
Prior art document
Patent documentation
Patent documentation 1:KR10-1269510B1 2013.05.24
Summary of the invention
(1) technical matters that will solve
The present invention completes to solve Problems existing in described conventional art, the present invention relates to a kind of method utilizing two kinds of sensors to measure hydrogen concentration, it is by being set directly at nuclear reactor vessel inside by be made up of thermocatalysis hydrogen sensor and semiconductor gas sensor two kinds of sensors, block by the leakage of the air of radioactive contamination and simplify the subsidiary facility needed for hydrogen checkout equipment, and expand the measurement range of the Thermal catalytic sensor of the hydrogen concentration mensuration being confined to low concentration, the hydrogen concentration that can realize high concentration thus measures.
(2) technical scheme
In order to realize described object, hydrogen concentration assay method of the present invention, it comprises the following steps: step S10, after thermocatalysis hydrogen sensor is arranged on laboratory inside, calculates the temperature output function f (x in linear characteristic interval
1), and the temperature output function f (x in nonlinear characteristic interval
2), meanwhile, calculate the hydrogen concentration of the interval starting point of nonlinear characteristic; Step S20, at the standard output of laboratory internal adjustment semiconductor gas sensor, to make in the hydrogen concentration of the interval starting point of nonlinear characteristic calculated in described S10 step, the output of described semiconductor gas sensor is converted to high signal or low signal; Step S30, after semiconductor gas sensor in thermocatalysis hydrogen sensor in described S10 step and described S20 step being arranged on the nuclear reactor vessel inside needing to measure hydrogen concentration, while measuring the sensor signal value of displays temperature by the described thermocatalysis hydrogen sensor being arranged on described nuclear reactor vessel inside, measured the sensor signal value in the linear property interval of display or nonlinear characteristic interval by described semiconductor gas sensor; Step S40, based on the sensor signal value measured by described semiconductor gas sensor, determines whether that linear characteristic is interval or nonlinear characteristic is interval; And step S50, according to the judgement of described S40 step, the temperature that measures in described S30 step is substituted into correspond to the interval or nonlinear characteristic of linear characteristic interval in arbitrary interval temperature output function in, export hydrogen concentration.
(3) beneficial effect
According to the present invention, by directly arrange in nuclear reactor vessel inside thermocatalysis hydrogen sensor and semiconductor gas sensor block likely because of the method for sampling produce by the leakage of the air of radioactive contamination, and omit the subsidiary facilities such as hydrogen analytical equipment, reduce the expenditure of construction of detection system thus.
Further, according to the present invention, have the following advantages: can rapidly and safely the real time measure accident time the nuclear reactor vessel inside hydrogen concentration of high concentration that produces, therefore, it is possible to take safety measures rapidly.
Further, according to the present invention, have the following advantages: the hydrogen concentration realizing being difficult to the nonlinear characteristic interval measured by thermocatalysis hydrogen sensor is measured, and can measure the hydrogen concentration of high concentration thus.
Accompanying drawing explanation
Fig. 1 be represent in the past for measuring and monitoring the synoptic diagram of the hydrogen watch-dog of the hydrogen concentration in nuclear reactor vessel.
Fig. 2 is the synoptic diagram of the hydrogen watch-dog representing the hydrogen concentration for measuring nuclear reactor vessel inside of the present invention.
Fig. 3 represents the schematic diagram being applicable to sensor assembly of the present invention.
Fig. 4 is that represent can the figure of sensor signal value of chart temp. displaying function by being applicable to thermocatalysis hydrogen sensor of the present invention.
Fig. 5 is the figure representing the mensuration circuit being applicable to semiconductor gas sensor of the present invention.
Fig. 6 represents to be applicable to thermocatalysis hydrogen sensor of the present invention, the acting characteristic of semiconductor gas sensor and the figure of the chart of hydrogen concentration that measured by the present invention.
Fig. 7 periodically represents that hydrogen concentration of the present invention measures the process flow diagram of process.
Description of reference numerals
10: nuclear reactor vessel
20: hydrogen analytical equipment
30: monitoring cabinet
40: main control room (MCR)
50: sensor assembly
51: thermocatalysis hydrogen sensor
52: semiconductor gas sensor
Embodiment
Below, with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 2 is the synoptic diagram of the hydrogen watch-dog representing the hydrogen concentration for measuring nuclear reactor vessel 10 inside of the present invention, in the present invention, in order to measure hydrogen concentration, the sensor assembly 50 be made up of can be set in described nuclear reactor vessel inside thermocatalysis hydrogen sensor and semiconductor gas sensor.Fig. 3 represents the schematic diagram being applicable to sensor assembly 50 of the present invention, represents the situation being formed sensor assembly in described sensor assembly by semiconductor gas sensor 52 and multiple thermocatalysis hydrogen sensor 51.But as required, the present invention can be provided separately thermocatalysis hydrogen sensor and semiconductor gas sensor respectively in nuclear reactor vessel inside, and can be out of shape as required.
In order to tackle fault or maloperation in the present invention, plural multiple thermocatalysis hydrogen sensor can be possessed.Further, multiple described sensor assembly itself can be formed in nuclear reactor vessel inside.Now, after chamber calculates each sensor assembly and forms the thermocatalysis hydrogen sensor of sensor assembly and the characteristic of semiconductor gas sensor by experiment, the hydrogen concentration of nuclear reactor vessel inside can be measured based on the signal measured by each sensor assembly.Namely, according to the linear characteristic interval of thermocatalysis hydrogen sensor and the temperature output function in nonlinear characteristic interval that form each sensor assembly, and the output signal of semiconductor gas sensor, measure the hydrogen concentration of nuclear reactor vessel inside, even if a certain sensor assembly breaks down or maloperation thus, also hydrogen concentration can be measured neatly.
Sensor technology for detecting hydrogen concentration is usually expressed as variforms such as thermocatalysis mode, semiconductor-type, electrolyte (electric chemical formula), optical fiber formula or piezoelectric types.
Wherein, thermocatalysis hydrogen sensor measures the mode being reacted into the reaction heat that direct ratio generates with the hydrogen catalysis in air, as shown in Equation 1, utilize the hydrogen in the air of nuclear reactor vessel inside to be combined with the oxygen molecule at catalyzer internal oxidition and the redox reaction (Oxidation-Reduction Reaction) that occurs, it is characterized by the reaction heat that detects with reduction process to measure hydrogen concentration.
2H
2+ O
2→ 2H
2o+ heat (Heat) (1)
Usually, thermocatalysis hydrogen sensor is made up of pottery and metal material, has excellent resistance to environmental characteristics due to this characteristic.But, in described thermocatalysis hydrogen sensor, there is the tendency that in the hydrogen concentration in more than nonlinear characteristic interval, catalytic reaction can reduce.If hydrogen concentration increases, then reaction heat continues to rise, and the voltage detected also should continue along with the rising of reaction heat to rise, but when thermocatalysis hydrogen sensor, there is the tendency that saturation characteristic reduces on the contrary in nonlinear characteristic interval.
Fig. 6 comprises the figure representing and be applicable to the chart of the acting characteristic of thermocatalysis hydrogen sensor of the present invention, for convenience of explanation, represents the action of thermocatalysis hydrogen sensor with the chart of linear function mode.The described saturation characteristic had based on thermocatalysis hydrogen sensor and the conventional hydrogen of thermocatalysis in the past supervisory system are only in the scope of the 4vol.% for being contemplated to during accident under general design standards or major accident standard and 10vol.%.But when the major accident of such as Fukushima nuclear accident, the hydrogen concentration of nuclear reactor vessel inside more than 10%, and is likely blasted, and therefore needs to measure the hydrogen concentration more than 10%.
Fig. 4 is that represent can the figure of determination sensor signal value by thermocatalysis hydrogen sensor, at aluminium oxide (Al
2o
3) material flexible pipe in the detecting element of thermopair form is installed, described detecting element terminal part coating platinum and described platinum is used as catalyzer.By coated described catalyzer, the hydrogen molecule (H of internal tank
2) and oxygen molecule (O
2) catalytic reaction occurs and produces heat, the reaction heat produced is converted to electric signal and exports.In the present invention, by setting up the temperature compensating element with detecting element same way, the simple reaction heat that the hydrogen catalysis based on reality reacts can be detected thus
Semiconductor gas sensor is the sensor be made up of metal oxide, be utilize the ceramic masses such as tin oxide, zinc paste is heated to the temperature of more than 300 ° after when being exposed to arbitrary characteristic gas thermal conductivity
the sensor of the character that can change, utilizes the characteristic that the resistance of metal oxide diminishes relative to arbitrary hydrogen concentration.
Fig. 5 is the figure representing the mensuration circuit being applicable to semiconductor gas sensor of the present invention, by conversion
measure the R of circuit
ref.(measuring resistance) adjusts standard output, and to make in the hydrogen concentration of the interval starting point of nonlinear characteristic in thermocatalysis hydrogen sensor, the output of semiconductor gas sensor is converted to high signal or low signal.
Fig. 6 comprises the figure representing and be applicable to the chart of the acting characteristic of semiconductor gas sensor of the present invention, illustrates that in the hydrogen concentration of the interval starting point of nonlinear characteristic in thermocatalysis hydrogen sensor, the output of semiconductor gas sensor is converted to the situation of low signal.With reference to Fig. 6, when the known output when semiconductor gas sensor is high signal value, hydrogen concentration is in linear characteristic interval, and when the output of described semiconductor gas sensor is low signal value, hydrogen concentration is in nonlinear characteristic interval.
In the present invention, based on the output valve (sensor signal value) of the temperature output function measured by thermocatalysis hydrogen sensor and the high or low signal value that exported by semiconductor gas sensor, realize the mensuration of the hydrogen concentration that linear characteristic is interval or nonlinear characteristic is interval, realize the method that also stably can measure hydrogen concentration under the high concentration in nonlinear characteristic interval thus.
Fig. 7 periodically represents that hydrogen concentration of the present invention measures the process flow diagram of process.According to the present invention, first, after thermocatalysis hydrogen sensor (or the sensor assembly together formed by thermocatalysis hydrogen sensor and semiconductor gas sensor) is arranged on laboratory inside, calculate the temperature output function f (x in linear characteristic interval
1), and the temperature output function f (x in nonlinear characteristic interval
2), meanwhile, calculate the hydrogen concentration S10 of the interval starting point of nonlinear characteristic.That is, after the thermocatalysis hydrogen sensor for the mensuration of hydrogen concentration is installed in the laboratory inside be made up of seal cavity, change hydrogen concentration and inject and accounting temperature output function.Temperature output function has following characteristic: in certain interval of low concentration, output temperature as sensor signal value increases along with the increase of hydrogen concentration, in high concentration region, even if hydrogen concentration increases, the output temperature as sensor signal value still reduces.
Represent the temperature output function chart of described thermocatalysis hydrogen sensor in Fig. 6 with linear function, but usually represent by the mode of higher order functionality, and for convenience of explanation, for cubic function, following table can show mathematical expression.
f(x
1)＝a
1x
1 3+b
1x
1 2+c
1x
1+d
1(2)
f(x
2)＝a
2x
2 3+b
2x
2 2+c
2x
2+d
2(3)
At this, f (x
1) and f (x
2) represent the output temperature of the sensor signal value in the interval and nonlinear characteristic interval of linear characteristic as thermocatalysis hydrogen sensor, x respectively
1, x
2represent the hydrogen concentration in this interval, a
1, a
2, b
1, b
2, c
1, c
2, d
1and d
2represent the constant that the conversion characteristics of the chart in each interval is intrinsic.
In the present invention, be set to and in the scope of 0 ~ 50vol.%, change hydrogen concentration and inject, according to injected hydrogen concentration and the temperature value accounting temperature output function exported.In this process, increase even if calculate hydrogen concentration, the temperature value exported still starts the concentration value reduced, and described concentration value becomes the starting point in nonlinear characteristic interval.
After calculating the temperature output function in linear characteristic interval and nonlinear characteristic interval and the hydrogen concentration of the interval starting point of nonlinear characteristic, at the standard output of laboratory internal adjustment semiconductor gas sensor, to make in the hydrogen concentration of the interval starting point of described nonlinear characteristic, the output of described semiconductor gas sensor is converted to high signal or low signal S20.Fig. 5 is the figure representing the mensuration circuit being applicable to semiconductor gas sensor of the present invention, is measured the R of circuit by conversion
ref.(measuring resistance) adjusts, to make, in the hydrogen concentration of the interval starting point of nonlinear characteristic in thermocatalysis hydrogen sensor, to export and be converted to high signal or low signal.
After S20 step, after semiconductor gas sensor in thermocatalysis hydrogen sensor in described S10 step and described S20 step being arranged on the nuclear reactor vessel inside needing to measure hydrogen concentration, while measuring the sensor signal value S30 of displays temperature by the described thermocatalysis hydrogen sensor being arranged on nuclear reactor vessel inside, measured the sensor signal value in the linear property interval of display or nonlinear characteristic interval by described semiconductor gas sensor after, based on the sensor signal value measured by described semiconductor gas sensor, determine whether linear characteristic interval or the interval S40 of nonlinear characteristic, according to the judgement of described S40 step, the temperature that measures in described S30 step is substituted into correspond to the interval or nonlinear characteristic of linear characteristic interval in the temperature output function in any one interval to export hydrogen concentration S50.
Fig. 6 comprises the figure representing and be applicable to the chart of the acting characteristic of semiconductor gas sensor of the present invention, illustrates that in the hydrogen concentration of the interval starting point of nonlinear characteristic in thermocatalysis hydrogen sensor, the output of semiconductor gas sensor is converted to the situation of low signal.With reference to Fig. 6, when the known output when semiconductor gas sensor is high signal value, hydrogen concentration is in linear characteristic interval, and when the output of described semiconductor gas sensor is low signal value, hydrogen concentration is in nonlinear characteristic interval.That is, when the output signal of semiconductor gas sensor is high signal value, hydrogen concentration is equivalent to linear characteristic interval, thus f (the x of the applicable formula of thermocatalysis temperature output function (2)
1) measure the hydrogen concentration in linear characteristic interval.Further, when the output signal of semiconductor gas sensor is low signal value, hydrogen concentration is equivalent to nonlinear characteristic interval, thus f (the x of the applicable formula of thermocatalysis temperature output function (3)
2) measure the hydrogen concentration in linear characteristic interval.
According to the present invention, have the following advantages: by while nuclear reactor vessel inside directly arranges thermocatalysis hydrogen sensor and semiconductor gas sensor blocks by the leakage of the air of radioactive contamination, can safely and promptly the real time measure accident time the nuclear reactor vessel inside hydrogen concentration of high concentration that produces, thus can take safety measures rapidly, and the hydrogen concentration that can realize the nonlinear characteristic interval being difficult to be measured by thermocatalysis hydrogen sensor is measured, thus can measure the hydrogen concentration of high concentration.
Above preferred embodiments of the present invention have been disclosed for illustrative, but interest field of the present invention is not limited thereto, be interpreted as interest field of the present invention and relate to the substantive equivalents with embodiments of the invention, without departing from the spirit and scope of the present invention, those skilled in the art can carry out various deformation.
Claims (3)
1. utilize two kinds of sensors to measure a method for hydrogen concentration, it is characterized in that, comprise the following steps:
Step S10, after thermocatalysis hydrogen sensor is arranged on laboratory inside, calculates the temperature output function f (x in linear characteristic interval
1), and the temperature output function f (x in nonlinear characteristic interval
2), meanwhile, calculate the hydrogen concentration of the interval starting point of nonlinear characteristic;
Step S20, at the standard output of laboratory internal adjustment semiconductor gas sensor, to make in the hydrogen concentration of the interval starting point of nonlinear characteristic calculated in described S10 step, the output of described semiconductor gas sensor is converted to high signal or low signal;
Step S30, after semiconductor gas sensor in thermocatalysis hydrogen sensor in described S10 step and described S20 step being arranged on the nuclear reactor vessel inside needing to measure hydrogen concentration, while measuring the sensor signal value of displays temperature by the described thermocatalysis hydrogen sensor being arranged on described nuclear reactor vessel inside, measured the sensor signal value in the linear property interval of display or nonlinear characteristic interval by described semiconductor gas sensor;
Step S40, based on the sensor signal value measured by described semiconductor gas sensor, determines whether that linear characteristic is interval or nonlinear characteristic is interval; And
Step S50, according to the judgement of described S40 step, the temperature that measures in described S30 step is substituted into correspond to the interval or nonlinear characteristic of linear characteristic interval in arbitrary interval temperature output function in, export hydrogen concentration.
2. the method utilizing two kinds of sensors to measure hydrogen concentration according to claim 1, is characterized in that,
Described thermocatalysis hydrogen sensor is formed with two or more in nuclear reactor vessel.
3. the method utilizing two kinds of sensors to measure hydrogen concentration according to claim 1, is characterized in that,
The temperature output function f (x in described linear characteristic interval
1) and the temperature output function f (x in nonlinear characteristic interval
2) calculating by change hydrogen concentration and inject process carry out.
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|---|---|---|---|
| KR10-2013-0101986 | 2013-08-27 | ||
| KR20130101986A KR101459576B1 (en) | 2013-08-27 | 2013-08-27 | Measurement method of hydrogen concentration by using two different sensors |
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| CN106683723B (en) * | 2017-01-22 | 2018-03-27 | 苏州热工研究院有限公司 | A kind of reactor samarium poison On-line Measuring Method |
| CN107967952B (en) * | 2017-10-27 | 2021-01-19 | 中国核电工程有限公司 | System and method for monitoring gas concentration in containment after serious accident of reactor |
| CN114204078A (en) * | 2021-11-12 | 2022-03-18 | 上海凌逐新能源科技有限公司 | Safety system for wind tunnel type fuel cell environment cabin |
| KR20230148583A (en) | 2022-04-18 | 2023-10-25 | 주식회사 아모센스 | Hybrid hydrogen sensor |
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| JP3929846B2 (en) | 2002-07-26 | 2007-06-13 | 理研計器株式会社 | Intermittent drive type combustible gas detector |
| JP4164019B2 (en) | 2003-11-26 | 2008-10-08 | 日本特殊陶業株式会社 | Combustible gas detector |
| JP4602124B2 (en) | 2004-06-29 | 2010-12-22 | 本田技研工業株式会社 | Gas detector |
| JP2009103605A (en) | 2007-10-24 | 2009-05-14 | Yazaki Corp | Circuit and method for measuring gas concentration |
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