CN105785428A - Underground radon gas monitoring method and system for seismic precursor monitoring - Google Patents
Underground radon gas monitoring method and system for seismic precursor monitoring Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 114
- 229910052704 radon Inorganic materials 0.000 title claims abstract description 110
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000002243 precursor Substances 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 11
- 210000003437 trachea Anatomy 0.000 claims description 10
- 239000003673 groundwater Substances 0.000 claims description 8
- 230000005587 bubbling Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 239000004429 Calibre Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 9
- 230000003068 static effect Effects 0.000 abstract description 7
- BWJGGLDSZPWFHM-UHFFFAOYSA-N radon hydrate Chemical compound O.[Rn] BWJGGLDSZPWFHM-UHFFFAOYSA-N 0.000 abstract description 3
- 238000013480 data collection Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 166
- 239000002349 well water Substances 0.000 description 13
- 235000020681 well water Nutrition 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 150000002500 ions Chemical class 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 150000003257 radon Chemical class 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- LBDSXVIYZYSRII-IGMARMGPSA-N alpha-particle Chemical compound [4He+2] LBDSXVIYZYSRII-IGMARMGPSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
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- 230000008676 import Effects 0.000 description 1
- 238000000752 ionisation method Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 229920001721 polyimide Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/01—Measuring or predicting earthquakes
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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
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Abstract
he invention discloses an underground radon gas monitoring method and system for seismic precursor monitoring. The monitoring method comprises steps of water and gas separation, ionization, signal conversion, and display processing. In addition, the monitoring system is composed of a gas collection device, an ionization chamber, a data collection unit, and a display unit. With the method and system, continuous and stable water and gas separation can be carried out on dynamic and static underground water and thus gas contained by the underground water can be extracted effectively; ionization is carried out on internal gas including radon gas in an ionization chamber; and the concentration change of the radon gas is monitored according to the strength of the current signal generated by ionization. Therefore, the method and system have high stability and reliability and the high monitoring precision of underground water radon gas and thus are suitable for different underground water environments.
Description
Technical field
The present invention relates to a kind of radon gas monitoring method and system, particularly relate to a kind of underground radon gas monitoring method for monitoring of earthquake precursors and system.
Background technology
China and surrounding area earthquake in recent years takes place frequently, and relates to that territorial scope is wide, harm is big.For this, the various Method means that the abnormal phenomena occurred before occurring for seismic precursor and earthquake is monitored become important content and the focus of seismic study.Wherein, underground fluid, it is also possible to store some other gases in subsoil water (water contained in well water, spring water, subterranean layer), oil and natural gas, subterranean strata.By the chemical analysis of these underground fluids of instrument monitoring and some physical quantity, the situation of change studying them can help people to predict earthquake.Such as, there is report to claim 1995 Japan Kobe earthquake front earth's surface radon gas content to add 10%, have the basement in some houses to be detected radon gas.Therefore, the radon gas content in subsoil water is monitored a kind of important method and the means that become monitoring of earthquake precursors.
In the prior art, in subsoil water, the Method means of radon gas monitoring is primarily present problems with:
One is automatic monitor for continuously problem.Radon gas in subsoil water is in a kind of dynamic changing process continuously, relevant with many factors such as region, time, season, month, ambient temperatures, and to realize monitoring of earthquake precursors, then the radon gas in subsoil water have to be carried out automatic monitoring long-time, successional and analysis, the abnormal conditions that radon gas occurs so could be made accurate analysis and judgement by such as variation monitoring situation, history contemporaneity contrastive detection situation etc. in short-term.In prior art, there is also the artificial method gathering radon gas, be mainly dissolved in the radon gas in subsoil water with the form of bubbling and precipitate out the mensuration carrying out radon value.Raising along with earthquake monitoring and forecasting demand, it is desirable to carry out Continuous Observation, the radon gas monitoring technology of manual type obviously cannot meet demand.In prior art, radon gas is realized the method for automatic monitor for continuously based on scintigraphy, the scintillation chamber of the scintigraphy emanometer wherein adopted is very easy to contaminated, poor stability, there is also the problems such as gas circuit transmission is easily disturbed, auxiliary device is more, to such an extent as to the emanometer based on scintigraphy principle can not play a role well in monitoring of earthquake precursors field.
Two is monitoring accuracy problem.Collect again after the radon gas dissolved in subsoil water is separated and carry out Concentration Testing, this process needs to be separated from subsoil water by radon gas as far as possible fully, and whole process needs to be in continual and steady state, collection and the concentration change of radon gas otherwise can be affected because aqueous vapor lock out operation is unstable.
Three is suitability problem.Flow regime according to subsoil water is different, it is possible to be divided into water,artesian-well, for instance the dynamic spring water that underground constantly gushes out, and this water,artesian-well is in the state of dynamically flowing；Also has hydrostatic level observation well water, for instance the static well water that many places, underground pool together, this inspection well water substantially remains static.So, the Method means that the subsoil water of different conditions carries out adopt when radon gas separates is wanted targetedly, to adapt to different application conditions.
For these reasons, it is necessary to provide a kind of underground radon gas monitoring method for monitoring of earthquake precursors and system, subsoil water can carry out stablize lasting aqueous vapor separate, automatically isolated radon gas be carried out ionization detection continuously, and is applicable to multiple subsoil water applied environment.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of underground radon gas monitoring method for monitoring of earthquake precursors and system, solve that radon gas monitoring in subsoil water is difficult to steady and continuous by prior art automatically to monitor, and the problem such as monitoring accuracy is not high, to adapt to groundwater environment limited.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: provide a kind of underground radon gas monitoring method for monitoring of earthquake precursors, including: aqueous vapor separates, gas contained in water outlet is separated continuously from subsoil water, by this gas collection isolated and export continuously, after dried, it is input to ionization chamber；Ionization, carries out high pressure ionization at this ionization chamber to this gas, forms the ion stream being directly proportional to radon gas content；Signal is changed, and the low current signal that this ion manifold becomes is converted to voltage signal, after amplifier amplifies, then carries out analog digital conversion, obtains the digital signal of reflection radon gas content；Display processes, and this digital signal is displayed, transmits, stores and is analyzed and processed, in order to the dynamic situation of change of radon gas content to be described.
In the present invention in another embodiment of the underground radon gas monitoring method of monitoring of earthquake precursors, this separates the method for contained gas in water outlet continuously from subsoil water: this subsoil water flows continuously, through Vertical Free falling, a large amount of water droplet is splash after falling the platform that dabbles, realizing water separated from the gas, this water droplet is discharged after collecting.
In the present invention in another embodiment of the underground radon gas monitoring method of monitoring of earthquake precursors, the method of gas contained by water outlet that should be continuously separated from subsoil water is: this level of ground water is in ground well, bubble is blasted continuously below the water surface of this ground well, this bubble floats up after entering subsoil water, attach contained gas in this subsoil water to overflow together, it is achieved water is separated from the gas simultaneously.
Present invention also offers a kind of underground radon gas monitoring system for monitoring of earthquake precursors, including for gathering the gas collecting apparatus of gas in subsoil water, the collecting pipe outlet of this gas collecting apparatus is airtight with the air inlet of ionization chamber to be connected, after this gas enters ionization chamber, by the gas ionization in this ionization chamber under ionization high pressure effect, the ionization ion being consequently formed is received by the reception electrode arranged in this ionization chamber and forms ion current, non-ionized gas is discharged from the gas outlet of this ionization chamber, this ion current is transferred to signal processing module through cable, complete the current signal conversion to voltage signal, and carried out analog digital conversion by data acquisition module and form digital signal after amplifier amplifies, output displays to display processing unit, storage and analyzing and processing.
In the present invention in another embodiment of the underground radon gas monitoring system of monitoring of earthquake precursors, this gas collecting apparatus is bottom lock, top is provided with the transparent cylindrical housing of opening conduit, the top of this cylindrical housings is hemisphere, this opening conduit includes inlet channel, collecting pipe, this inlet channel is arranged on hemispheroidal left side, this top, and become left bank angle with the vertical centering control axis of this cylindrical housings, this inlet channel extends to form a water outlet port not contacted bottom this cylindrical housings downward vertically, this collecting pipe is arranged on this hemispheroidal center, cylindrical housings top, it is additionally provided with drainage pipeline in the bottom of this cylindrical housings, the platform that dabbles upwardly extending and exporting higher than this drainage pipeline it is additionally provided with in this cylindrical housings bottom inside, this platform that dabbles does not contact this water outlet port.
In the present invention in another embodiment of the underground radon gas monitoring system of monitoring of earthquake precursors, this opening conduit also includes admission line, this admission line is arranged on hemispheroidal right side, this top, and become right bank angle with the vertical centering control axis of this cylindrical housings, this inlet channel is with admission line together with this cylindrical housings internal tandem, and this admission line is airtight with the gas outlet of this ionization chamber to be connected.
In the present invention in another embodiment of the underground radon gas monitoring system of monitoring of earthquake precursors, this gas collecting apparatus includes bottom opening and the cylindrical housings immersing in subsoil water, the top bore of this cylindrical housings reduces and upwardly extends as trachea, this trachea stretches out subsoil water plane, admission line and collecting pipe it is provided with at the top of this trachea, the inlet end of this admission line connects bubbling device, this admission line extends vertically downward and connects bubble stripper in its outlet side, and this bubble stripper is also immersed in subsoil water and covers in this circular cylindrical shell body.
In the present invention in another embodiment of the underground radon gas monitoring system of monitoring of earthquake precursors, airtight between the outlet of this collecting pipe and the air inlet of ionization chamber it is serially connected with air hose and gas drier；Or, between this air hose and gas drier, also it is serially connected with the captation for collecting this air hose internal moisture.
In the present invention in another embodiment of the underground radon gas monitoring system of monitoring of earthquake precursors, the horizontally disposed opening of inlet channel of this gas collecting apparatus, vertically extend and pipe diameter convergent after direction is changed, until forming the outlet that lowest calibre is 1 millimeter, the column type that is arranged below in this outlet catchments cavity, this cavity bottom that catchments is horizontally extending and arranges outlet, near this water outlet end, an air collecting chamber isolated with this cavity that catchments is extended to by this cavity bottom up of catchmenting, a collecting pipe is tapered on this air collecting chamber top.
In the present invention in another embodiment of the underground radon gas monitoring system of monitoring of earthquake precursors, this signal processing module connects this data acquisition unit and display processing unit by long transmission line；Or, this signal processing module, data acquisition unit, display processing unit become one equipment；Or, this signal processing module and data acquisition unit become one, and are connected to this display processing unit by long transmission line.
The invention has the beneficial effects as follows: the invention discloses a kind of underground radon gas monitoring method for monitoring of earthquake precursors and system.This radon gas monitoring method includes the separation of step aqueous vapor, ionization, signal conversion and display and processes, and monitoring system includes gas collecting apparatus, ionization chamber, data acquisition unit, display processing unit.The aqueous vapor that this radon gas monitoring method is capable of with system dynamic and static subsoil water is carried out continuous-stable is used to separate, effectively extract contained gas in subsoil water, then in ionization chamber, the internal gas containing radon gas being ionized, the power of current signal formed further according to ionization is to monitor the concentration change of radon gas.The method and system stability be reliable, the monitoring accuracy of subsoil water radon gas is high and be applicable to different groundwater environment, it is to avoid inspection well is distant with sight chamber, and the transmission of distance trachea is to the loss of gas and interference.
Accompanying drawing explanation
Fig. 1 is the present invention flow chart for underground radon gas monitoring method one embodiment of monitoring of earthquake precursors；
Fig. 2 is the present invention composition diagram for underground radon gas monitoring system one embodiment of monitoring of earthquake precursors；
Fig. 3 is the present invention ionization chamber composition schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors；
Fig. 4 is the present invention gas collecting apparatus schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors；
Fig. 5 is the present invention gas collecting apparatus schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors；
Fig. 6 is the present invention gas collecting apparatus schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors；
Fig. 7 is the present invention gas collecting apparatus schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors；
Fig. 8 is the present invention gas collecting apparatus schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with the drawings and specific embodiments, the present invention will be described in more detail.Accompanying drawing gives the preferred embodiment of the present invention.But, the present invention can realize in many different forms, however it is not limited to the embodiment described by this specification.On the contrary, the purpose providing these embodiments is to make the understanding to the disclosure more thorough comprehensively.
It should be noted that unless otherwise defined, all of technology that this specification uses is identical with the implication that the those skilled in the art belonging to the present invention are generally understood that with scientific terminology.The term used in the description of the invention is intended merely to the purpose describing specific embodiment, is not intended to the restriction present invention.The term "and/or" that this specification uses includes the arbitrary and all of combination of one or more relevant Listed Items.
Below in conjunction with accompanying drawing, various embodiments of the present invention are described in detail.
Fig. 1 is the present invention flow chart for underground radon gas monitoring method one embodiment of monitoring of earthquake precursors.Including 4 steps shown in Fig. 1, namely aqueous vapor separates S101, ionization S102, signal conversion S103, display process S104.
Aqueous vapor separates S101, separates gas contained in water outlet continuously from subsoil water, by isolated gas collection and export continuously, after dried, is input to ionization chamber.
The radon gas that there is underground is generally soluble in subsoil water, have radon gas accordingly to discharge when subsoil water is upwards gushed out or oozes out, particularly when crustal bathyderm activity is obvious, the output of underground radon gas, there will be fluctuation change, and this is the ultimate principle predicting earthquake by surveying radon contents.Therefore, when the gas (containing radon gas) dissolved in subsoil water is separated, it should separate fully as far as possible, and the Method means taked to have stability, so that the measurement of radon gas changes of contents is reliably effective.
For water,artesian-well, the dynamic spring water that such as underground constantly gushes out, the method of contained gas in water outlet that separates from subsoil water continuously is: this subsoil water flows continuously, through Vertical Free falling, a large amount of water droplet is splash after falling the platform that dabbles exceeding the water surface, realizing water separated from the gas, these water droplets are discharged after collecting.
Here, in order to ensure the concordance of measuring condition, it is desirable to carry out subsoil water when aqueous vapor separates and flow continuously and to remain stable for, for instance the flow of subsoil water is 6 liters/min.It addition, the altitude range adopting Vertical Free falling is 0.4 meter-1.0 meters.And by overboard splash to the platform that dabbles in order that aqueous vapor separates fully, the water droplet splashed down is more many more little, is more conducive to the spilling of Radon In The Ground Water gas.Adopting the minimum radon concentration content that this aqueous vapor separation method can be measured is 0.1Bq/L.
Well water is observed for hydrostatic level, the static well water that such as many places, underground pool together, the method of contained gas in water outlet that separates from subsoil water continuously is: this level of ground water is in ground well, bubble is blasted continuously in the water of this ground well, these bubbles float up after entering subsoil water, attach contained gas in subsoil water to overflow together, it is achieved water is separated from the gas simultaneously.
Here, in order to ensure the concordance of measuring condition, it is desirable in ground well water, continuous uniform blasts the air pressure range of bubble is 50Pa-500Pa.The more high bubble blasted of air pressure is more many more fast, is more conducive to the radon gas dissolved in well water to overflow, but bubble also brings along the decline of radon concentration too much.Therefore, connection in ground well being blasted bubble and to carry out conservative control, keep bubble 2-5/second, bubble mean diameter is 0.001-0.005 rice.Adopting the minimum radon concentration content that this aqueous vapor separation method can be measured is 0.1Bq/L.
Ionization S102, carries out high voltage ionization to containing radon gas body in ionization chamber, forms the ion stream being directly proportional to this radon gas content.
Radon gas belongs to radgas, and radon gas can give off alpha-particle through decay.Utilizing this characteristic of radon gas, will be input to high pressure ionization chamber containing radon gas body, high voltage range here is 150V-800V.The ionization current size that the alpha-particle that radon and daughter disintegration thereof are released produces is proportional to the concentration of radon.Signal conversion S103, is converted to voltage signal by ionization current, after amplifier amplifies, then carries out analog digital conversion, obtain the digital signal of reflection radon gas content.
Here, the weak current that ion manifold becomes is generally at 0.1pA-20pA, and the decay that this low current signal transmits on the line is bigger, it is therefore desirable to is converted to voltage signal and is just conducive to being transmitted on circuit after the amplification of amplifier.Voltage range after amplifier amplifies is ± 2V.Obtain digital signal through analog digital conversion, be so convenient for digitized transmission and process, be conducive to being transmitted on the computer network, storing and show analysis etc..
Display processes S104, this digital signal is displayed, transmits, stores and is analyzed and processed, in order to the dynamic situation of change of radon gas content to be described.
This step belongs to man-machine dialogue system, it is therefore an objective to provide the current of radon gas changes of contents and historic state information, by radon gas changes of contents situation is analyzed, provides foundation for earthquake prediction analysis further.
Compared with prior art, underground of the present invention radon gas monitoring method embodiment shown in Fig. 1 provides the method monitoring Radon In The Ground Water Gas content based on ionization method, radon gas in subsoil water is carried out the method for aqueous vapor separation and is applicable to dynamic subsoil water and static subsoil water, and adopt current to splash to the platform that dabbles when aqueous vapor separates, in subsoil water, blast the technological means of bubble ensure that and isolate radon gas to greatest extent.The above method and measure ensure that on the whole and can the radon gas of low concentration content in subsoil water also can be detected, and improves the precision of detection, and has good Stability and adaptability.
Based on the same design of the underground radon gas monitoring method embodiment being used for monitoring of earthquake precursors shown in Fig. 1, Fig. 2 is the present invention composition diagram for underground radon gas monitoring system one embodiment of monitoring of earthquake precursors.Fig. 2 includes gas collecting apparatus 21, ionization chamber 22, power supply unit 23, data acquisition unit 24, display processing unit 25.Fig. 3 is the present invention ionization chamber composition schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors.Ionization chamber 22 embodiment shown in Fig. 3 is cylindrical structure, and Fig. 3 is its cross-sectional schematic, mainly includes air inlet 221, gas outlet 222, receives electrode 223, signal processing module 224, cable 225.
The work process of this underground radon gas monitoring system embodiment is described below in conjunction with Fig. 2 and Fig. 3.nullHere，The collecting pipe outlet of gas collecting apparatus 21 is airtight with the air inlet 221 of ionization chamber 22 to be connected，After the gas gathered by gas collecting apparatus 21 enters ionization chamber 22，By the gas ionization in ionization chamber 22 under ionizing high-tension effect，The ionization ion being consequently formed is ionized in room 22 the reception electrode 223 arranged and receives and form ion current，Remaining gas is discharged from the gas outlet 222 of ionization chamber 22，Ion current is transferred to signal processing module 224 through cable，Complete the current signal conversion to voltage signal，And be amplified processing by amplifier to voltage signal，Again through cable 225, the voltage signal of amplification is transferred to data acquisition unit 24 and carries out analog digital conversion formation digital signal，Output is to display processing unit 25，Complete Digital Transmission、Storage and display analysis etc. process，Display processing unit 25 can be common computer.Ionization chamber 22 is mainly powered by the power supply unit 23 in Fig. 2, meets ionization chamber 22 and produces to ionize high-tension needs.
In the present embodiment, signal processing module 224 can pass through long transmission line connection data acquisition unit 24 and display processing unit 25.As other alternative scheme, signal processing module 224, data acquisition unit 24, display processing unit 25 become one equipment, and now signal processing module 224 is not in ionization chamber 22, but out of ionization chamber.When become one equipment time can use as polyimide, can equipment be arranged in underground water well when being connected by long transmission line, it is not necessary to human attendance, personnel only need to be monitored operating by being placed on the display processing unit 25 on ground.Or having another scheme, signal processing module 224 and data acquisition unit 24 become one, and are arranged in ionization chamber, are connected to display processing unit 25 again through long transmission line.
In Fig. 3 the gas outlet 222 of ionization chamber 22 can be not connected to other devices and directly and outside air intercommunication, it is ensured that be in normal barometric pressure state in ionization chamber 22 all the time.Can also be connected airtight with gas collecting apparatus 21 for gas outlet 222, between ionization chamber 22 and gas collecting apparatus 21, form circulation canal, so can ensure that radon gas does not leak, strengthen the accuracy of detection.Due to gas collecting apparatus 21 and extraneous intercommunication, therefore also ensure that in ionization chamber 22 and gas collecting apparatus 21 as normal barometric pressure state.Being positioned on the axis of ionization chamber 22 it addition, receive electrode 223, its length is suitable with the length of ionization chamber 22, and this structure is conducive to ionization chamber to collect ion stream when carrying out gas ionization, strengthens ionization effect.
Fig. 4 is the present invention gas collecting apparatus cross-sectional schematic for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors.In Fig. 4, this gas collecting apparatus 41 is closed for bottom 42, top 43 is provided with the transparent cylindrical housing of opening conduit, the top 43 of this cylindrical housings is hemisphere, opening conduit includes inlet channel 44, collecting pipe 45, inlet channel is arranged on hemispheroidal side, described top, and become slanted angle with the vertical centering control axis of described cylindrical housings, inlet channel 44 extend to form downward vertically one do not contact bottom described cylindrical housings 42 water outlet port 46, described collecting pipe 45 is arranged on hemispheroidal center, described cylindrical housings top, it is additionally provided with drainage pipeline 47 in the bottom of described cylindrical housings.
Being provided with the upwardly extending platform 48 that dabbles inside 42 bottom this cylindrical housings, the platform 48 that dabbles does not contact the water outlet port 46 that inlet channel 46 extends inside cylindrical housings.Increasing the platform 48 that dabbles is conducive to water can form more little water particle after splashing to the platform 48 that dabbles, and aqueous vapor separates fully.Additionally, it can also be seen that from Fig. 4, this platform 48 top in umbrella part outlet higher than drainage pipeline 47 that dabbles, so ensure that in this gas collecting apparatus that the horizontal plane of storage is not above the top of this platform 48 that dabbles all the time, it is ensured that the water splashed down from water outlet port 46 is always able to fall this and dabbles platform 48.Certainly, except this umbrella-shaped structure, other similar structures, as cone, cylinder etc. with oblique section broadly fall into protection scope of the present invention.
Fig. 5 monitors another gas collecting apparatus embodiment schematic diagram on system embodiment basis in the present invention shown in Fig. 4 for the underground radon gas of monitoring of earthquake precursors.Wherein, the function of gas collecting apparatus 41 to drainage pipeline 47 is identical with Fig. 4, repeats no more.It is distinctive in that: opening conduit also includes admission line 49, this admission line 49 opposite side of being arranged on hemisphere top 43 corresponding with inlet channel 44, and become slanted angle with the vertical centering control axis of this cylindrical housings, this admission line 49 is with inlet channel 44 together with this cylindrical housings internal tandem, and admission line 49 is airtight with the gas outlet 222 of ionization chamber embodiment shown in Fig. 3 is connected.
Gas collecting apparatus embodiment shown in Fig. 4 and Fig. 5 is mainly used in artesian well and the subsoil water dynamically flowed is carried out radon gas separation.Subsoil water enters in this gas collecting apparatus 41 by inlet channel 44, and subsoil water enters the flow of inlet channel 44 and can be controlled, it is preferred to 6 liters/min, water outlet port 46 is 0.4 meter-1.0 meters to the altitude range at platform 48 top that dabbles..Utilizing the radon concentration scope that both gas collecting apparatus embodiments realize aqueous vapor separation is 0.1Bq/L-10000Bq/L.
Fig. 6 is the present invention gas collecting apparatus generalized section for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors.Compared with gas collecting apparatus embodiment shown in Fig. 4 and Fig. 5, gas collecting apparatus embodiment shown in Fig. 6 is mainly used in hydrostatic level observation well water.In figure 6, the both sides of well head 501 are the boreholes wall 502, and well head 501 is internal is the well water face 505 that arrives of well water, and the well water in this hydrostatic level inspection well is mainly subsoil water and permeates gradually to collect and form.nullGas collecting apparatus shown in Fig. 6 includes bottom opening and the cylindrical housings 503 immersing in subsoil water，The top bore of this cylindrical housings 503 reduces and upwardly extends as trachea 504，This trachea 504 stretches out well water face 505，Admission line 507 and collecting pipe 510 it is provided with at the top of trachea 504，The inlet end of this admission line 507 connects bubbling device 508，Admission line 507 extends vertically downward and connects bubble stripper 506 in its outlet side，This bubble stripper 506 is also immersed in subsoil water and covers in this cylindrical housings 503，Collecting pipe 510 exports and airtight between the air inlet of ionization chamber is serially connected with air hose 511 and gas drier 512，Collecting pipe 510 is airtight with the import of air hose 511 to be connected，The outlet of air hose 511 is airtight with the entrance point of gas drier 512 to be connected，The port of export of gas drier 512 is gas outlet 513.
Also at admission line 507, bubbling device 508 place being provided with effusion meter 509 in Fig. 6, the gas flow for bubbling device 508 is produced carries out metering display, such that it is able to control bubbling device 508 to produce suitable bubble.
Fig. 7 is based on the present invention gas collecting apparatus generalized section for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors of Fig. 6.Wherein, the function of well head 501 to gas outlet 513 is identical with Fig. 6, repeats no more.It is distinctive in that: between air hose 511 and gas drier 512, be serially connected with the captation 514 for collecting this air hose 511 internal moisture.
Fig. 8 is the present invention gas collecting apparatus schematic diagram for underground radon gas monitoring another embodiment of system of monitoring of earthquake precursors.Wherein, inlet channel 81 is horizontally disposed opening 82, extends and pipe diameter convergent at vertical direction after direction is changed, until forming the outlet 83 that lowest calibre is 1 millimeter, so that the effect flowed out at outlet 83 formation High-Pressure Water.Preferably, the bore of this outlet 83 ranges for 1 millimeter to 5 millimeters.The column type that is arranged below of outlet 83 catchments cavity 84, bottom this cavity 84 that catchments horizontally extending and outlet 85 is set, near outlet 85 end, an air collecting chamber 86 isolated with the cavity 84 that catchments is extended to by cavity 84 bottom up of catchmenting, taper to a collecting pipe 87 on this air collecting chamber 86 top, can airtight with the air inlet of ionization chamber be connected by the outlet 88 of this collecting pipe 87.
Based on above example, underground provided by the invention radon gas monitoring method includes the separation of step aqueous vapor, ionization, signal conversion and display and processes, and monitoring system includes gas collecting apparatus, ionization chamber, data acquisition unit, display processing unit.The aqueous vapor that this radon gas monitoring method is capable of with system dynamic and static subsoil water is carried out continuous-stable is used to separate, effectively extract contained gas in subsoil water, then by ionization to internal gas in ionization chamber, the power of the current signal formed further according to ionization is to monitor the concentration change of radon gas.The method and system stability be reliable, the monitoring accuracy of subsoil water radon gas is high and be applicable to different groundwater environment.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention and accompanying drawing content to make, or directly or indirectly it is used in other relevant technical fields, it is included in the scope of patent protection of the present invention.
Claims (10)
1. the underground radon gas monitoring method for monitoring of earthquake precursors, it is characterised in that
Aqueous vapor separates, and separates gas contained in water outlet continuously from subsoil water, by isolated gas collection and export continuously, after dried, is input to ionization chamber；
Ionization, carries out high pressure ionization to the gas in described ionization chamber, forms the ion stream being directly proportional to radon gas content；
Signal is changed, and the low current signal that described ion manifold becomes is converted to voltage signal, after amplifier amplifies, then carries out analog digital conversion, obtains the digital signal of reflection radon gas content；
Display processes, and described digital signal is displayed, transmits, stores and is analyzed and processed, in order to the dynamic situation of change of radon gas content to be described.
2. the underground radon gas monitoring method for monitoring of earthquake precursors according to claim 1, it is characterized in that, described from subsoil water, separate continuously the method for contained gas in water outlet be: described subsoil water flows continuously, through Vertical Free falling, a large amount of water droplet is splash after falling the platform that dabbles exceeding the water surface, realizing water separated from the gas, described water droplet is discharged after collecting.
3. the underground radon gas monitoring method for monitoring of earthquake precursors according to claim 1, it is characterized in that, described from subsoil water, separate continuously the method for contained gas in water outlet be: described level of ground water is in ground well, bubble is blasted continuously in described subsoil water, described bubble floats up after entering subsoil water, in subsidiary described subsoil water, contained gas overflows together simultaneously, it is achieved water is separated from the gas.
4. the underground radon gas monitoring system for monitoring of earthquake precursors, including for gathering the gas collecting apparatus of contained gas in subsoil water, it is characterized in that, the collecting pipe outlet of described gas collecting apparatus is airtight with the air inlet of ionization chamber to be connected, after described gas enters ionization chamber, by the gas ionization in described ionization chamber under ionization high pressure effect, the ionization ion being consequently formed is received by the reception electrode arranged in described ionization chamber and forms ion current, remaining gas is discharged from the gas outlet of described ionization chamber, described ion current is completed the current signal conversion to voltage signal by signal processing module, and after amplifier amplifies, it is transferred to data acquisition unit and carries out analog digital conversion formation digital signal, output displays to display processing unit again, storage and analyzing and processing.
5. the underground radon gas monitoring system for monitoring of earthquake precursors according to claim 4, it is characterized in that, described gas collecting apparatus is bottom lock, top is provided with the transparent cylindrical housing of opening conduit, the top of described cylindrical housings is hemisphere, described opening conduit includes inlet channel, collecting pipe, described inlet channel is arranged on hemispheroidal side, described top, and become slanted angle with the vertical centering control axis of described cylindrical housings, described inlet channel extends to form a water outlet port downward vertically, described collecting pipe is arranged on hemispheroidal center, described cylindrical housings top, the bottom of described cylindrical housings is provided with drainage pipeline, the platform that dabbles upwardly extending and exporting higher than described drainage pipeline it is additionally provided with in described cylindrical housings bottom inside, the described platform that dabbles does not contact described water outlet port.
6. the underground radon gas monitoring system for monitoring of earthquake precursors according to claim 5, it is characterized in that, described opening conduit also includes admission line, described admission line is corresponding with described inlet channel is arranged on described hemispheroidal opposite side, and become slanted angle with the vertical centering control axis of described cylindrical housings, described inlet channel is with admission line together with described cylindrical housings internal tandem, and described admission line is airtight with the gas outlet of described ionization chamber to be connected.
7. the underground radon gas monitoring system for monitoring of earthquake precursors according to claim 4, it is characterized in that, described gas collecting apparatus includes bottom opening and the cylindrical housings immersing in subsoil water, the top bore of described cylindrical housings reduces and upwardly extends as trachea, described trachea stretches out subsoil water plane, admission line and collecting pipe it is provided with at the top of described trachea, the inlet end of described admission line connects bubbling device, described admission line extends vertically downward and connects bubble stripper in its outlet side, described bubble stripper is also immersed in subsoil water and covers in described circular cylindrical shell body.
8. the underground radon gas monitoring system for monitoring of earthquake precursors according to claim 7, it is characterised in that airtight between the outlet of described collecting pipe and the air inlet of ionization chamber be serially connected with air hose and gas drier；Or, between described air hose and gas drier, also it is serially connected with the captation for collecting described air hose internal moisture.
9. the underground radon gas monitoring system for monitoring of earthquake precursors according to claim 4, it is characterized in that, the horizontally disposed opening of inlet channel of described gas collecting apparatus, vertically extend and pipe diameter convergent after direction is changed, until forming the outlet that lowest calibre is 1 millimeter, the column type that is arranged below in described outlet catchments cavity, the described cavity bottom that catchments is horizontally extending and arranges outlet, near described water outlet end, an air collecting chamber isolated with the described cavity that catchments is extended to by described cavity bottom up of catchmenting, a collecting pipe is tapered on described air collecting chamber top.
10. the arbitrary underground radon gas monitoring system for monitoring of earthquake precursors according to claim 4 to 9, it is characterised in that described signal processing module connects described data acquisition unit and display processing unit by long transmission line；Or, described signal processing module, data acquisition unit, display processing unit become one equipment；Or, described signal processing module and data acquisition unit become one, and are connected to described display processing unit by long transmission line.
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