CN107045006A - Very low frequency method detects the device of underground water oil vapour pollution - Google Patents
Very low frequency method detects the device of underground water oil vapour pollution Download PDFInfo
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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
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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Abstract
The invention discloses the device that a kind of very low frequency method detects underground water oil vapour pollution, including casing and it is arranged at the control panel of box house, the control panel is provided with whip antenna, magnetic rod antenna, USB interface, display, LED alarm lamp, Frequency Band Selection button and power switch, control panel built-in circuit includes electromagnetic induction receiving unit, signal processing unit and power supply unit, and wherein power supply unit is connected by circuit with electromagnetic induction receiving unit and signal processing unit respectively.The present invention is simple in construction, with low cost and easy to use, analyzed by the amplitude and phase of very low frequency signal, avoid the amplitude information for only utilizing signal in the prior art, the signal of a guidance station can only once be received, make the technical problem that measuring result error is big, effectively increase detection efficiency and accuracy of detection.
Description
Technical field
The invention belongs to underground water oil vapour pollution detection means technical field, and in particular to a kind of very low frequency method detects underground
The device of aqueous hydrocarbon pollution.
Background technology
Nowadays, China has been enter into auto age, and the people for driving private car is more and more, and many car owners can not find oiling often
When standing and feel embarrassed.But, when gas station is built in from entrance, whether people are unsafe by that can worry gas station, refuel
Station is one of very important urban pollution resource.It is reported that, gas station oil gas incident of leakage occurs for various regions and many, such as in the U.S.
In one of nineties investigation, in 210,000 gas stations, 40% has a leakage, and 150,000 gas stations etc. are pending.The oil of leakage
Gas meeting polluted underground water source and soil, give people comfortable urban life and bring unpredictable risk.But before in order to
Eliminate pollution, prevent the further diffusion of pollution, people be typically at the oil and gas leakage near bore several mouthfuls of wells and groundwater abstraction
Sample is analyzed, and this methods engineering amount is big, and the duration is also grown, it is necessary to expend the substantial amounts of time and efforts of people.Therefore, grind
Make a kind of flexible working mode and the high underground water oil vapour pollution detection means of measurement accuracy is imperative, in addition, development is high
The underground oil and gas pollution detection technology of precision is also that Technology Times set up safety, the foundation stone of green city.
The content of the invention
Present invention solves the technical problem that there is provided a kind of flexible working mode and the high very low frequency method inspection of measurement accuracy
The device that aqueous hydrocarbon pollutes under geodetic, it is dirty that the device is combined detection underground aqueous hydrocarbon using very low frequency method with signal processing technology
Dye degree and display alarm in real time, facilitate staff to grasp some local ground watering oil vapour pollution situation in real time.
The present invention adopts the following technical scheme that very low frequency method detects underground water oil vapour pollution to solve above-mentioned technical problem
Device, it is characterised in that including casing and be arranged at the control panel of box house, the control panel is provided with whip antenna, magnetic
Staff aerial, USB interface, display, LED alarm lamp, Frequency Band Selection button and power switch, control panel built-in circuit include electricity
Induced magnetic fields receiving unit, signal processing unit and power supply unit, wherein power supply unit pass through circuit and electromagnetic induction respectively
Receiving unit is connected with signal processing unit；Electromagnetic induction receiving unit includes frequency overlapped-resistable filter, low-noise amplifier, rubidium
Atomic frequency standard and pulse shaper, whip antenna and magnetic rod antenna are electrically connected with frequency overlapped-resistable filter respectively, the whiplike day
Line is used to receive the VLF signals that the wave band for coming from guidance station is 10-15KHz, and magnetic rod antenna is made up for feeling of permeability magnetic material
Answer the electromagnetic signal around bar magnet, frequency overlapped-resistable filter is electrically connected with low-noise amplifier, the frequency overlapped-resistable filter is used for pair
The electromagnetic signal received, which is filtered, handles and extracts useful electromagnetic signal, low-noise amplifier and A/D capture cards electricity
Property connection, the low-noise amplifier uses the amplifying circuit being made up of AD7520 of adjustable gain, and multiplication factor adjusts in 8-128
Section, can amplify useful signal according to the signal strength received, and Rb atom frequency marking is electrically connected with pulse shaper, the rubidium
Atomic frequency standard is used to export stable sine wave signal, and pulse shaper is electrically connected with A/D capture cards, shaping pulse electricity
Road is used for the sampling pulse signal for being handled sine wave signal and being exported 40KHz；Signal processing unit includes A/D capture cards
And computer, A/D capture cards and computer be electrically connected with, and the A/D capture cards are used for the useful signal after amplification and sampling arteries and veins
Rush signal to carry out conversion process and store to A/D capture cards, built-in computer has computation of apparent resistivity module, the apparent resistivity
Computing module is used to the data in A/D capture cards carrying out calculating processing obtaining the apparent resistivity in the region, and with computer
The apparent resistivity standard value of the clean underground water of storage is carried out with reference to contrast, computer respectively by circuit and LED alarm lamp and
Display is connected, and LED alarm lamp is used to start warning reminding when the apparent resistivity relative value measured exceedes the setting value upper limit, shows
Showing device is used to showing all data in test process, and the data storage is in the data memory module of computer and passes through USB
Interface is exported in order to data research.
The operation method of the device of very low frequency method detection underground water oil vapour pollution of the present invention, it is characterised in that specific
Process is：When needing to detect whether the oil and gas leakage near gas station pollutes underground water nearby and pollution level with scope,
Using gas station's leakage point as the center of circle, with any a length of radius, in the parallel place's horizontal positioned detection means of earth's surface, turn on the power out
Close, power supply unit is started working, search comes from the VLF signals that Russian Alpha navigation system is launched, magnetic to whip antenna automatically
Staff aerial starts to sense the magnetic-field component in vertical direction, while channel selection knob is rotated, after fixed knob after signal stabilization,
Extract useful signal by frequency overlapped-resistable filter, and be amplified by low-noise amplifier after processing, with through rubidium atom frequency
The 40KHz of mark frequency dividing circuit shaping output sampling pulse signal carries out conversion process in A/D capture cards, and computer is to extracting
The amplitude and phase of the VLF signals arrived carry out processing record, and calculate the relative variation of apparent resistivity, by check analysis
Afterwards, finally data result is sent in the data memory module of computer, and shown over the display, if the data result
More than the setting upper limit, LED alarm lamp starts alarm.
The present invention is simple in construction, with low cost and easy to use, is analyzed by the amplitude and phase of very low frequency signal,
The amplitude information for only utilizing signal in the prior art is avoided, the signal of a guidance station can only be once received, make measurement result
The big technical problem of error, effectively increases detection efficiency and accuracy of detection.
Brief description of the drawings
Fig. 1 is the module connection figure of the present invention；
Fig. 2 is the structural representation of the present invention.
In figure：1st, casing, 2, control panel, 3, whip antenna, 4, magnetic rod antenna, 5, USB interface, 6, Frequency Band Selection presses
Button, 7, display, 8, power switch, 9, LED alarm lamp.
Embodiment
The particular content of the present invention is described in detail with reference to accompanying drawing.As shown in Figure 1-2, very low frequency method detection underground aqueous hydrocarbon is dirty
The device of dye, including casing 1 and the control panel 2 that is arranged inside casing 1, the control panel 2 are provided with whip antenna 3, magnetic
Staff aerial 4, USB interface 5, display 7, LED alarm lamp 9, Frequency Band Selection button 6 and power switch 8, the in-built electrical of control panel 2
Road includes electromagnetic induction receiving unit, signal processing unit and power supply unit, and wherein power supply unit passes through circuit and electricity respectively
Induced magnetic fields receiving unit is connected with signal processing unit；Electromagnetic induction receiving unit includes frequency overlapped-resistable filter, low noise
Amplifier, Rb atom frequency marking and pulse shaper, whip antenna 3 and magnetic rod antenna 4 electrically connect with frequency overlapped-resistable filter respectively
Connect, the whip antenna 3 is used to receive the VLF signals that the wave band for coming from guidance station is 10-15KHz, and magnetic rod antenna 4 is by magnetic conduction material
Material is made for sensing the electromagnetic signal around bar magnet, and frequency overlapped-resistable filter is electrically connected with low-noise amplifier, and this is anti-aliasing
Wave filter, which is used to be filtered the electromagnetic signal that receives, handles and extracts useful electromagnetic signal, low-noise amplifier with
A/D capture cards are electrically connected with, and the low-noise amplifier uses the amplifying circuit being made up of AD7520 of adjustable gain, multiplication factor
Adjusted in 8-128, useful signal, Rb atom frequency marking and pulse shaper electricity can be amplified according to the signal strength received
Property connection, the Rb atom frequency marking is used to export stable sine wave signal, and pulse shaper is electrically connected with A/D capture cards,
The pulse shaper is used for the sampling pulse signal for being handled sine wave signal and being exported 40KHz；Signal processing unit
Including A/D capture cards and computer, A/D capture cards are electrically connected with computer, and the A/D capture cards are used for will be useful after amplification
Signal and sampling pulse signal carry out conversion process and stored to A/D capture cards, and built-in computer has computation of apparent resistivity mould
Block, the computation of apparent resistivity module is used to the data in A/D capture cards carrying out the apparent resistivity that calculating processing obtains the region,
And carried out with the apparent resistivity standard value of clean underground water that is stored in computer with reference to contrast, computer respectively by circuit with
LED alarm lamp and display connection, LED alarm lamp are used to start when the apparent resistivity relative value measured exceedes the setting value upper limit
Warning reminding, display is used to show all data in test process, and the data storage is in the data memory module of computer
In and by USB interface export in order to data research.
The present invention operation principle be：After underground water is by oil vapour pollution, in contaminated area resistivity mainly by phreatic surface it
On gasoline controlled, gasoline has infiltrated the soil on phreatic surface, causes resistivity to raise, in addition, contaminated area top layer is glutinous
Soil constitutes a good plugged zone, prevents the free diffusing of gasoline.By the relative change for measuring underground water resistivity
Value, and these variable quantities are compared after signal transacting with the real resistivity value of underground water, it is possible to deduce this
The underground water oil vapour pollution situation at place, the invention analyzed by the amplitude and phase of very low frequency signal, it is to avoid existing skill
Only it can only once receive the signal of a guidance station using the amplitude information of signal in art, make the technology that measuring result error is big
Problem, effectively increases detection efficiency and accuracy of detection.
The present invention carrying out practically process be：When need detect gas station near oil and gas leakage whether pollute nearby underground
When water and pollution level are with scope, using gas station's leakage point as the center of circle, with any a length of radius, put in the parallel place's level of earth's surface
Detection means is put, is turned on the power switch, power supply unit is started working, then search comes from Russia to whip antenna automatically
The VLF signals of Alpha navigation system transmitting, magnetic rod antenna starts to sense the magnetic-field component in vertical direction, while rotating channel
Knob is selected, after fixed knob after signal stabilization, useful signal is extracted by frequency overlapped-resistable filter, and pass through low noise amplification
Device is amplified after processing, and the sampling pulse signal of the 40KHz with being exported through the shaping of Rb atom frequency marking frequency dividing circuit is gathered in A/D
Carry out conversion process in card, computer carries out processing record to the amplitudes of VLF signals and phase extracted, and calculates apparent resistance
Data result, after check analysis, is finally sent in the data memory module of computer by the relative variation of rate, and
Show over the display, if the data result exceedes the setting upper limit, LED alarm lamp starts alarm.The device is available for related work
Personnel grasp the underground water oil vapour pollution situation for understanding the region in real time, then according to testing result, formulate rational improvement side
Case, for improving environment, and ensures the quality of life of resident nearby.
Have been shown and described above the general principle of the present invention, principal character and advantage, do not depart from spirit of the invention and
On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements both fall within claimed invention
Scope.
Claims (2)
1. very low frequency method detects the device of underground water oil vapour pollution, it is characterised in that including casing and be arranged at the control of box house
Panel processed, the control panel is pressed provided with whip antenna, magnetic rod antenna, USB interface, display, LED alarm lamp, Frequency Band Selection
Button and power switch, control panel built-in circuit include electromagnetic induction receiving unit, signal processing unit and power supply unit, its
Middle power supply unit is connected by circuit with electromagnetic induction receiving unit and signal processing unit respectively；Electromagnetic induction receives single
Member includes frequency overlapped-resistable filter, low-noise amplifier, Rb atom frequency marking and pulse shaper, whip antenna and magnetic rod antenna point
It is not electrically connected with frequency overlapped-resistable filter, the whip antenna is used to receive the VLF that the wave band for coming from guidance station is 10-15KHz
Signal, magnetic rod antenna is made up for sensing the electromagnetic signal around bar magnet of permeability magnetic material, and frequency overlapped-resistable filter is put with low noise
Big device is electrically connected with, and the frequency overlapped-resistable filter, which is used to be filtered the electromagnetic signal received, handles and extract useful electricity
Magnetic signal, low-noise amplifier is electrically connected with A/D capture cards, and the low-noise amplifier is using adjustable gain by AD7520 groups
Into amplifying circuit, multiplication factor adjusts in 8-128, can amplify useful signal according to the signal strength received, and rubidium is former
Sub- frequency marking is electrically connected with pulse shaper, and the Rb atom frequency marking is used to export stable sine wave signal, shaping pulse electricity
Road is electrically connected with A/D capture cards, and the pulse shaper is used for the sampling for being handled sine wave signal and being exported 40KHz
Pulse signal；Signal processing unit includes A/D capture cards and computer, and A/D capture cards are electrically connected with computer, and the A/D is adopted
Truck is used to the useful signal after amplification and sampling pulse signal carrying out conversion process and stored to A/D capture cards, calculates
Machine is built-in with computation of apparent resistivity module, and the computation of apparent resistivity module is used to carry out the data in A/D capture cards at calculating
Reason obtains the apparent resistivity in the region, and the apparent resistivity standard value of the clean underground water with being stored in computer is carried out with reference to right
Than computer is connected by circuit with LED alarm lamp and display respectively, and LED alarm lamp is used in the apparent resistivity phase measured
Start warning reminding when exceeding the setting value upper limit to value, display is used to show all data in test process, and the data are deposited
It is stored in the data memory module of computer and by USB interface export in order to data research.
2. a kind of operation method of the device of the very low frequency method detection underground water oil vapour pollution described in claim 1, its feature exists
It is in detailed process：When needing to detect whether the oil and gas leakage near gas station pollutes nearby underground water and pollution level and scope
When, using gas station's leakage point as the center of circle, with any a length of radius, in the parallel place's horizontal positioned detection means of earth's surface, open
Power switch, power supply unit is started working, and search comes from the VLF that Russian Alpha navigation system is launched to whip antenna automatically
Signal, magnetic rod antenna starts to sense the magnetic-field component in vertical direction, while channel selection knob is rotated, after solid after signal stabilization
Determine knob, useful signal is extracted by frequency overlapped-resistable filter, and be amplified by low-noise amplifier after processing, and through rubidium
The 40KHz of atomic frequency standard frequency dividing circuit shaping output sampling pulse signal carries out conversion process, computer in A/D capture cards
Processing record is carried out to the amplitudes of VLF signals and phase extracted, and calculates the relative variation of apparent resistivity, by control
After analysis, finally data result is sent in the data memory module of computer, and shown over the display, if the data
As a result the setting upper limit is exceeded, LED alarm lamp starts alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154900.5A CN107045006B (en) | 2017-03-15 | 2017-03-15 | Device for detecting oil gas pollution of underground water by using very low frequency method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154900.5A CN107045006B (en) | 2017-03-15 | 2017-03-15 | Device for detecting oil gas pollution of underground water by using very low frequency method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107045006A true CN107045006A (en) | 2017-08-15 |
| CN107045006B CN107045006B (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710154900.5A Active CN107045006B (en) | 2017-03-15 | 2017-03-15 | Device for detecting oil gas pollution of underground water by using very low frequency method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991646A (en) * | 2017-11-21 | 2018-05-04 | 中国电子科技集团公司第二十研究所 | Very low frequency navigation electric wave propagation prediction refined method based on cloud framework |
| CN108957557A (en) * | 2018-05-07 | 2018-12-07 | 河南师范大学 | A kind of very low frequency method coal mine gob detection device |
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|---|---|---|---|---|
| US3984758A (en) * | 1974-06-14 | 1976-10-05 | Bureau De Recherches Geologiques Et Minieres | Method and apparatus for geophysical exploration in drill holes by means of very low frequency waves |
| CN204731426U (en) * | 2015-05-18 | 2015-10-28 | 河南师范大学 | A kind of very low frequency (VLF) visits water instrument |
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2017
- 2017-03-15 CN CN201710154900.5A patent/CN107045006B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3984758A (en) * | 1974-06-14 | 1976-10-05 | Bureau De Recherches Geologiques Et Minieres | Method and apparatus for geophysical exploration in drill holes by means of very low frequency waves |
| CN204731426U (en) * | 2015-05-18 | 2015-10-28 | 河南师范大学 | A kind of very low frequency (VLF) visits water instrument |
Non-Patent Citations (1)
| Title |
|---|
| 牛有田等: "基于软件无线电的甚低频法探矿的研究", 《地球物理学进展》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991646A (en) * | 2017-11-21 | 2018-05-04 | 中国电子科技集团公司第二十研究所 | Very low frequency navigation electric wave propagation prediction refined method based on cloud framework |
| CN108957557A (en) * | 2018-05-07 | 2018-12-07 | 河南师范大学 | A kind of very low frequency method coal mine gob detection device |
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| Publication number | Publication date |
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| CN107045006B (en) | 2023-02-03 |
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