CN103808768B - The on-the-spot mercury vapour detection system of earthquake precursors and mercury vapour detection method thereof - Google Patents
The on-the-spot mercury vapour detection system of earthquake precursors and mercury vapour detection method thereof Download PDFInfo
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- CN103808768B CN103808768B CN201310694577.2A CN201310694577A CN103808768B CN 103808768 B CN103808768 B CN 103808768B CN 201310694577 A CN201310694577 A CN 201310694577A CN 103808768 B CN103808768 B CN 103808768B
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Abstract
The present invention relates to the on-the-spot mercury vapour detection system of a kind of earthquake precursors and mercury vapour detection method thereof.Mercury vapour pick-up unit in mercury vapour detection system comprises the container being provided with gas channel and air intake opening and gas outlet, mercury detecting sensor is installed in gas channel, mercury detecting sensor comprises a glass-ceramic substrate, there is chromium rete in the front of glass-ceramic substrate, chromium rete is coated with golden membranous layer, golden membranous layer is towards gas channel, and the left end of golden membranous layer and right-hand member respectively have a gold solder dish, and gold solder dish is connected with a testing circuit.Mercury vapour detection method is, the sample gas with mercury vapour flows into the air intake opening of mercury vapour pick-up unit, flows through gas channel, mercury vapour is absorbed by the golden membranous layer of mercury detecting sensor, the resistance variations signal of golden membranous layer flows to testing circuit, processing of circuit after testing, obtains the mercury vapour content value of sample gas.The present invention is not easily interfered, reliable test result, surveys mercury highly sensitive, improves two orders of magnitude, meet the needs of seismic monitoring than existing method.
Description
Technical field
The present invention relates to a kind of mercury pick-up unit, particularly relate to the on-the-spot mercury vapour detection system of a kind of earthquake precursors that is highly sensitive, reliable test result and mercury vapour detection method thereof.
Background technology
At hot spring, zone of fracture or structural belt (shatter belt), the deep zone of fracture relevant with seismic activity all finds to have mercury vapour; Underground nuclear blasting and Hydraulic Fracturing Tests show, in the process of the instantaneous pressurization in rock stratum and persistent pressure, mercury quantity change is the most obvious, clear.These phenomenons all illustrate, increasing of mercury vapour concentration is relevant with seismic activity.
Mercury has very high vapor pressure.The mercury vapour generated under Deep Condition, under powerful pressure gradient and heat gradient effect, its migration is spread along the blowhole of fractured zones, fault surface and unlatching to earth's surface.Tectonic activity, with stress and thermodynamic activity, makes country rock be suppressed, turns round the sassafras that to rub with the changing of the relative positions, in the process with contacted medium interaction.In fixed point or the various medium of periodic measurement, mercury quantity change can understand the activity of structure, catches information of earthquake, for earthquake prediction provides foundation.
Just because of mercury, there is the volatility of special physicochemical property, particularly mercury, penetrability and the susceptibility to temperature, pressure change, determine the sensitivity of mercury to earthquake response.
Mercurometric survey method uses based on Clod Vapour Atomic Absorption technology at present carries out mercurometric survey.Mercury vapour pick-up unit comprises mercury lamp, monochromator, absorption tube, quartz lens and photomultiplier.Mercury lamp produces
mercury characteristic light, passes through
monochromator filters, pass through absorption tube again, can pass through under the focusing of ultraviolet quartz lens, characteristic light is incident upon on the light-sensitive cathode of photomultiplier transit, when gaseous mercury atom absorbs characteristic light in the environment, there is faint change in the characteristic light of penetrating on light-sensitive cathode, and photomultiplier carries out this change to amplify and converts electricity output to, realize the conversion of chemical quantity to electricity, complete the measurement of mercury concentration.Its ultimate principle is: the ground state atom of any one element has Selective absorber characteristic to the characteristic spectral line that same element is launched, that is: mercury lamp emission
characteristic light can by the mercury atom selective absorbing in tested gas, and within the scope of finite concentration, transmitted intensity and ground state atom concentration are directly proportional, and according to its absorbance, can determine the mercury concentration of sample.This relation obeys Lambert-Beer's law.
But this mercury vapour pick-up unit and detection method, have the following disadvantages: 1. sensitivity is lower, measure detecting of mercury vapour and be limited to 1 × 10
-11g mercury, and the mercury vapour concentration that earthquake precursors scene produces is well below this detectability, therefore, can not meet the needs of seismic monitoring; 2. power consumption is large, weight and volume is all larger, is not suitable for field condition and measures; 3. water vapour, flue dust and organic gas all can cause interference to mensuration; 4. complex structure, cost is higher, is unfavorable for promoting the use of.
Summary of the invention
The present invention mainly solve original mercury vapour pick-up unit and detection method sensitivity lower, measure detecting of mercury vapour be limited to 1 × 10
-11g mercury, can not meet the technical matters of the needs of seismic monitoring; There is provided the on-the-spot mercury vapour detection system of a kind of earthquake precursors and mercury vapour detection method thereof, it is highly sensitive that it surveys mercury, improves two orders of magnitude, meet the needs of seismic monitoring than existing method.
It is complicated that the present invention solves original mercury vapour structure of the detecting device simultaneously, and cost is higher, the technical matters be also easily disturbed; There is provided a kind of earthquake precursors on-the-spot mercury vapour detection system, its structure is simple, and cost is lower, is not easily interfered, reliable test result.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: the on-the-spot mercury vapour detection system of earthquake precursors of the present invention, comprise mercury vapour pick-up unit and testing circuit, mercury vapour pick-up unit comprises the container of air intake opening and the gas outlet being provided with gas channel and be communicated with gas channel, mercury detecting sensor is provided with in gas channel, described mercury detecting sensor comprises a glass-ceramic substrate, the front of glass-ceramic substrate is provided with one deck chromium rete, chromium rete is coated with one deck golden membranous layer, golden membranous layer is towards described gas channel, the left end of golden membranous layer and right-hand member respectively have a gold solder dish, gold solder dish is connected with described testing circuit.Chromium rete, golden membranous layer are all very thin thin films, and gold solder dish is also very thin, all only has hundreds of dust, and all in vacuum coater, deposited by electron beam evaporation source plates.With mercury vapour in the gas (gas as deviate from fault gas or cold spring, thermal water) that earthquake precursors scene produces, the sample gas with mercury vapour enters the air intake opening of mercury vapour pick-up unit, flows through gas channel, is absorbed by the High Purity Gold of golden membranous layer.And in time mixing impurity in proof gold, foreign atom replaces the position of original gold atom in lattice, or insert gold atom interstitial void, cause the additional dispersion effect to electronics, thus produce additional resistance rate, show as resistance and increase.On the golden membranous layer surface of very thin (only having hundreds of dust), after the mercury vapour in adsorption sample gas, the resistance value of golden membranous layer just increases significantly, and 10
-13~ 10
-7in the scope of magnitude mercury content, the change in resistance of golden membranous layer is linear with absorption mercury quantity, therefore, is measured the change of golden membranous layer resistance by testing circuit, just can the content of mercury vapour in working sample gas.The mercury vapour recorded by scene is how many, can judge whether that having earthquake occurs.It is highly sensitive that the technical program surveys mercury, improves two orders of magnitude, reach 1 × 10 than existing method
-13gram mercury, meets the needs of seismic monitoring.
As preferably, the back side of the glass-ceramic substrate of described mercury detecting sensor is provided with one deck nickel chromium triangle rete, and the left end of nickel chromium triangle rete and right-hand member respectively have a gold solder dish, and gold solder dish connects an electrified regulation circuit.Nickel chromium triangle rete in the technical program and the gold solder dish be attached thereto, be all thin film, also in vacuum coater, deposited by electron beam evaporation source plates, and thickness all only has hundreds of dust.When the mercury adsorbed on the golden membranous layer of mercury detecting sensor arrives saturated, connect electrified regulation circuit, electrified regulation is carried out to nickel chromium triangle rete, the mercury be adsorbed on golden membranous layer is released, thus make the golden membranous layer of mercury detecting sensor get back to original state, obtain regeneration, so that the mercury carried out next time detects.
As preferably, be provided with mercury reference sensor in described gas channel, mercury reference sensor and described mercury detecting sensor are arranged on end face and the bottom surface of described gas channel face-to-face, and mercury reference sensor is connected with described testing circuit.Mercury reference sensor can experience the temperature of the sample gas flowing through gas channel, and export corresponding signal to testing circuit, to carry out temperature compensation to the mercury content obtained by mercury detecting sensor, and reduce water vapour in sample gas and, to the interference of mercury measurement result, guarantee mercury measurement reliable results further.
As preferably, described mercury reference sensor comprises a glass-ceramic substrate, the front of glass-ceramic substrate is provided with one deck chromium rete, chromium rete is coated with one deck golden membranous layer, the left end of golden membranous layer and right-hand member respectively have a gold solder dish, golden membranous layer and gold solder dish are coated with one deck oxide film layer, and gold solder dish is connected with described testing circuit.Chromium rete in the technical program, golden membranous layer, gold solder dish and oxide film layer, be all very thin thin film, all only have hundreds of dust, also in vacuum coater, deposited by electron beam evaporation source plates.Oxide film layer plays buffer action, make golden membranous layer cannot mercury vapour in adsorption sample gas, but the temperature variation of sample gas can be experienced, this change converts electric signal to and flows to testing circuit, to carry out temperature compensation to the mercury content obtained by mercury detecting sensor, and reduce water vapour in sample gas and, to the interference of mercury measurement result, guarantee the reliability of mercury measurement result further.
As preferably, described testing circuit comprises resistance R1, resistance R2, amplifier, single machine unit and display unit, one end of described mercury detecting sensor and one end of described mercury reference sensor are all connected with the positive pole of DC voltage V, the other end of mercury detecting sensor is connected with one end of resistance R1, the other end of mercury reference sensor is connected with one end of resistance R2, the other end of resistance R1 and the other end of resistance R2 are all connected with the negative pole of DC voltage V, resistance R1 and mercury detecting sensor and contact and resistance R2 and mercury reference sensor and contact be connected with two input ends of described amplifier respectively, the output terminal of amplifier is connected with the input end of single machine unit, the output terminal of single machine unit is connected with described display unit.Resistance R1, resistance R2 and mercury detecting sensor, mercury reference sensor composition bridge diagram, the temperature variation of sample gas can be compensated by this bridge diagram, eliminates the impact of temperature variation on mercury measurement result.Amplifier is AC amplifier, and the feeble signal that the mercury vapour concentration that mercury detecting sensor senses by it produces is amplified, and gives single machine unit process, finally demonstrates measured mercury content by display unit.
As preferably, the on-the-spot mercury vapour detection system of described earthquake precursors comprises clarifier, sampling apparatus and aspiration pump, the import of clarifier connects atmospheric carrier air, the outlet of clarifier is also connected with the air intake opening of described mercury vapour pick-up unit with the outlet of sampling apparatus, and the import of described aspiration pump is connected with the gas outlet of described mercury vapour pick-up unit.Clarifier is communicated with air, by the interference gas filtering in atmospheric carrier air, export carrier gas, sampling apparatus gathers the gas at earthquake precursors scene, after accurate quantification, under the promotion of the carrier gas provided at clarifier, sample gas is admitted to the air intake opening of mercury vapour pick-up unit, mercury vapour in sample gas is adsorbed by mercury detecting sensor, and the remaining gas in sample gas is discharged from the gas outlet of mercury vapour pick-up unit under the effect of mercury of bleeding, and is discharged in environment through aspiration pump.Sample gas physical efficiency is flowed in mercury vapour pick-up unit smoothly, and discharges from mercury vapour pick-up unit smoothly, improve the reliability of each mercury measurement result further.
The mercury vapour detection method of the on-the-spot mercury vapour detection system of earthquake precursors of the present invention, comprise the steps: the air intake opening of the mercury vapour pick-up unit described in flowing into the sample gas of mercury vapour, flow through described gas channel, mercury vapour is absorbed by the golden membranous layer of described mercury detecting sensor, golden membranous layer resistance increases, the resistance variations signal of golden membranous layer flows to described testing circuit, processing of circuit after testing, finally obtain the content value of mercury vapour in sample gas, the remaining gas in sample gas is discharged from the gas outlet of mercury vapour pick-up unit.The mercury vapour recorded by scene is how many, can judge whether that having earthquake occurs.It is highly sensitive that the technical program surveys mercury, improves two orders of magnitude, reach 1 × 10 than existing method
-13gram mercury, meets the needs of seismic monitoring.
As preferably, the back side of the glass-ceramic substrate of described mercury detecting sensor is provided with one deck nickel chromium triangle rete, and the left end of nickel chromium triangle rete and right-hand member respectively have a gold solder dish, and gold solder dish connects an electrified regulation circuit; Described mercury vapour detection method comprises the steps: after described mercury detecting sensor completes a mercury vapour detection, electrified regulation circuit described in connection, electrified regulation is carried out to described nickel chromium triangle rete, with the mercury that release is absorbed by the golden membranous layer of described mercury detecting sensor, the golden membranous layer of mercury detecting sensor is made to get back to original state.Mercury detecting sensor is made to obtain regeneration, so that the mercury carried out next time detects.
As preferably, be provided with mercury reference sensor in described gas channel, described mercury detecting sensor and mercury reference sensor are arranged on end face and the bottom surface of described gas channel face-to-face, and mercury reference sensor is connected with described testing circuit, described mercury vapour detection method comprises the steps: the air intake opening with the mercury vapour pick-up unit described in the sample gas inflow of mercury vapour, flow through described gas channel, the golden membranous layer of described mercury detecting sensor absorbs the mercury vapour in sample gas, golden membranous layer resistance increases, the resistance variations signal of golden membranous layer flows to described testing circuit, described mercury reference sensor can not absorb the mercury vapour in sample gas, but the signal exported along with the temperature variation mercury reference sensor of sample gas can change, the signal that mercury reference sensor exports also flows to described testing circuit, testing circuit processes the signal that the resistance variations signal of the golden membranous layer of the mercury detecting sensor received and mercury reference sensor are sent here, the resistance value of the golden membranous layer by mercury detecting sensor is increased and in the sample gas that obtains the content value of mercury vapour carry out temperature compensation, finally obtain the mercury vapour content value eliminating temperature impact.Reduce interference, guarantee the reliability of mercury measurement result further.
The invention has the beneficial effects as follows: mercury vapour detection sensitivity improves about two orders of magnitude than existing method, reaches 1 × 10
-13gram mercury, meets the needs of seismic monitoring; Structure is simple, and low in energy consumption, be easy to carry, cost is lower, compares with existing apparatus, eliminates frangible optical device, decreases the possibility broken down; Disturbing factor is few, has temperature compensation function, mercury vapour reliable test result.
Accompanying drawing explanation
Fig. 1 is a kind of system syndeton block diagram of the on-the-spot mercury vapour detection system of earthquake precursors of the present invention.
Fig. 2 is a kind of sectional structure schematic diagram of mercury vapour pick-up unit in the on-the-spot mercury vapour detection system of earthquake precursors of the present invention.
Fig. 3 is a kind of side-looking structural representation of mercury detecting sensor in mercury vapour pick-up unit of the present invention.
Fig. 4 is a kind of side-looking structural representation of mercury reference sensor in mercury vapour pick-up unit of the present invention.
Fig. 5 is a kind of circuit connection structure schematic diagram of testing circuit in the on-the-spot mercury vapour detection system of earthquake precursors of the present invention.
1. gas channels, 2. air intake opening, 3. gas outlet in figure, 4. container, 5. mercury detecting sensor, 6. mercury reference sensor, 7. amplifier, 8. single machine unit, 9. display unit, 10. clarifier, 11. sampling apparatuses, 12. aspiration pumps, 13. atmospheric carrier air, 14. mercury vapour pick-up units, 15. testing circuits, 51. glass-ceramic substrates, 52. chromium retes, 53. golden membranous layers, 54. gold solder dishes, 55. nickel chromium triangle retes, 56. gold solder dishes, 61. glass-ceramic substrates, 62. chromium retes, 63. golden membranous layers, 64. gold solder dishes, 65. oxide film layers.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: the on-the-spot mercury vapour detection system of earthquake precursors of the present embodiment, as shown in Figure 1, comprise clarifier 10, sampling apparatus 11, mercury vapour pick-up unit 14, testing circuit 15 and aspiration pump 12, the import of clarifier 10 connects atmospheric carrier air 13, the outlet of clarifier 10 is also connected with the air intake opening 2 of mercury vapour pick-up unit 14 with the outlet of sampling apparatus 11, the import of aspiration pump 12 is connected with the gas outlet 3 of mercury vapour pick-up unit 14, and mercury vapour pick-up unit 14 is connected with testing circuit 15.Aspiration pump 12 adopts film aspiration pump, and atmospheric carrier air 13 is common air.
As shown in Figure 2, mercury vapour pick-up unit 14 comprises container 4, the horizontally disposed gas channel 1 in narrow shape strip is had in container, container 4 by not Adsorption of Mercury and the polytetrafluoroethylmaterial material of high temperature resistant (280 DEG C) make, end face and the bottom surface of container have the air intake opening 2 and gas outlet 3 that are communicated with the left and right end of gas channel 1 respectively, the end face of gas channel 1 and bottom surface are separately installed with mercury detecting sensor 5 and mercury reference sensor 6, mercury detecting sensor 5 and mercury reference sensor 6 are installed face-to-face, middle formation gas channel.As shown in Figure 3, mercury detecting sensor 5 comprises a glass-ceramic substrate 51, the front of glass-ceramic substrate 51 is coated with one deck chromium rete 52 by deposited by electron beam evaporation source in vacuum coater, chromium rete 52 plates one deck golden membranous layer 53 again, golden membranous layer 53 is towards gas channel 1, and the left end of golden membranous layer 53 and right-hand member are coated with a gold solder dish 54 more respectively.The back side of glass-ceramic substrate 51 is coated with one deck nickel chromium triangle rete 55, and the left end of nickel chromium triangle rete 55 and right-hand member are coated with a gold solder dish 56, two gold solder dishes 56 more respectively and are connected with an electrified regulation circuit.As shown in Figure 4, mercury reference sensor 6 comprises a glass-ceramic substrate 61, the front of glass-ceramic substrate 61 is coated with one deck chromium rete 62 by deposited by electron beam evaporation source in vacuum coater, chromium rete 62 plates one deck golden membranous layer 63 again, the left end of golden membranous layer 63 and right-hand member are coated with a gold solder dish 64 more respectively, finally plate one deck oxide film layer 65 again, oxide film layer 65 covers golden membranous layer 63 and two gold solder dishes 64.
As shown in Figure 5, testing circuit 15 comprises resistance R1, resistance R2, amplifier 7, single machine unit 8 and display unit 9.Be plated in a gold solder dish 54 on the golden membranous layer 53 of mercury detecting sensor 5 and the gold solder dish 64 be plated in mercury reference sensor 6 is all connected with the positive pole of DC voltage V, another gold solder dish 54 be plated on the golden membranous layer 53 of mercury detecting sensor 5 is connected with one end of resistance R1, another gold solder dish 64 in mercury reference sensor 6 is connected with one end of resistance R2, the other end of resistance R1 and the other end of resistance R2 are all connected with the negative pole of DC voltage V, in the present embodiment, DC voltage V adopts direct current 12V voltage, the gold solder dish 54 of above-mentioned resistance R1 and mercury detecting sensor 5 and the gold solder dish 64 of contact and resistance R2 and mercury reference sensor 6 and contact be connected with two input ends of amplifier 7 respectively again, the output terminal of amplifier 7 is connected with the input end of single machine unit 8, the output terminal of single machine unit 8 is connected with display unit 9, in the present embodiment, display unit adopts LCDs, energy display graphics, word, alphabetical and digital.
The mercury vapour detection method of the on-the-spot mercury vapour detection system of above-mentioned earthquake precursors, comprises the steps:
A. clarifier 10 is communicated with air, by the interference gas filtering in atmospheric carrier air 13, exports carrier gas, sampling apparatus 11 gathers the gas at earthquake precursors scene, after accurate quantification, under the promotion of the carrier gas provided at clarifier 10, sample gas is admitted to the air intake opening 2 of mercury vapour pick-up unit 14;
B. with the air intake opening 2 of the sample gas inflow mercury vapour pick-up unit 14 of mercury vapour, flow through gas channel 1, the golden membranous layer 53 of mercury detecting sensor 5 absorbs the mercury vapour in sample gas, golden membranous layer 53 resistance increases, its voltage division signal flowing to amplifier 7 after being connected with resistance R1 changes thereupon, and mercury reference sensor 6 is owing to covering one deck oxide film layer 65, therefore the mercury vapour in sample gas can not be absorbed, but the temperature variation of sample gas can be experienced, different according to the temperature experienced, golden membranous layer 63 resistance of mercury reference sensor 6 also can change, its voltage division signal flowing to amplifier 7 after being connected with resistance R2 also changes thereupon, then through amplifier process and amplification, flow to single machine unit process again, finally obtain the mercury vapour content value eliminating temperature impact, LCDs shows, and the remaining gas in sample gas is extracted out by the gas outlet 3 of aspiration pump 12 from mercury vapour pick-up unit 14,
C. after mercury vapour pick-up unit 14 completes a mercury vapour detection, connect the electrified regulation circuit be connected with the gold solder dish 56 at mercury detecting sensor 5 back side, electrified regulation is carried out to the nickel chromium triangle rete 55 being positioned at mercury detecting sensor 5 back side, to discharge the mercury absorbed by the golden membranous layer 53 in mercury detecting sensor 5 front, make the golden membranous layer 53 of mercury detecting sensor 5 get back to original state, obtain regeneration.
Claims (7)
1. the on-the-spot mercury vapour detection system of earthquake precursors, it is characterized in that comprising mercury vapour pick-up unit (14) and testing circuit (15), mercury vapour pick-up unit (14) comprises the container (4) of air intake opening (2) and gas outlet (3) being provided with gas channel (1) and be communicated with gas channel (1), mercury detecting sensor (5) is provided with in gas channel (1), described mercury detecting sensor (5) comprises a glass-ceramic substrate (51), the front of glass-ceramic substrate (51) is provided with one deck chromium rete (52), chromium rete (52) is coated with one deck golden membranous layer (53), golden membranous layer (53) is towards described gas channel (1), the left end of golden membranous layer (53) and right-hand member respectively have a gold solder dish (54), gold solder dish (54) is connected with described testing circuit (15), the back side of the glass-ceramic substrate (51) of described mercury detecting sensor (5) is provided with one deck nickel chromium triangle rete (55), the left end of nickel chromium triangle rete (55) and right-hand member respectively have a gold solder dish (56), and gold solder dish (56) connects an electrified regulation circuit.
2. the on-the-spot mercury vapour detection system of earthquake precursors according to claim 1, it is characterized in that being provided with mercury reference sensor (6) in described gas channel (1), mercury reference sensor (6) and described mercury detecting sensor (5) are arranged on end face and the bottom surface of described gas channel (1) face-to-face, and mercury reference sensor (6) is connected with described testing circuit (15).
3. the on-the-spot mercury vapour detection system of earthquake precursors according to claim 2, it is characterized in that described mercury reference sensor (6) comprises a glass-ceramic substrate (61), the front of glass-ceramic substrate (61) is provided with one deck chromium rete (62), chromium rete (62) is coated with one deck golden membranous layer (63), the left end of golden membranous layer (63) and right-hand member respectively have a gold solder dish (64), golden membranous layer (63) and gold solder dish (64) are coated with one deck oxide film layer (65), gold solder dish (64) is connected with described testing circuit (15).
4. the on-the-spot mercury vapour detection system of earthquake precursors according to claim 2, it is characterized in that described testing circuit (15) comprises resistance R1, resistance R2, amplifier (7), single machine unit (8) and display unit (9), one end of described mercury detecting sensor (5) and one end of described mercury reference sensor (6) are all connected with the positive pole of DC voltage V, the other end of mercury detecting sensor (5) is connected with one end of resistance R1, the other end of mercury reference sensor (6) is connected with one end of resistance R2, the other end of resistance R1 and the other end of resistance R2 are all connected with the negative pole of DC voltage V, resistance R1 and mercury detecting sensor (5) and contact and resistance R2 be connected with two input ends of described amplifier (7) respectively with the also contact of mercury reference sensor (6), the output terminal of amplifier (7) is connected with the input end of single machine unit (8), the output terminal of single machine unit (8) is connected with described display unit (9).
5. the on-the-spot mercury vapour detection system of earthquake precursors according to claim 1, it is characterized in that comprising clarifier (10), sampling apparatus (11) and aspiration pump (12), the import of clarifier (10) connects atmospheric carrier air (13), the outlet of clarifier (10) is also connected with the air intake opening (2) of described mercury vapour pick-up unit (14) with the outlet of sampling apparatus (11), and the import of described aspiration pump (12) is connected with the gas outlet (3) of described mercury vapour pick-up unit (14).
6. the mercury vapour detection method of the on-the-spot mercury vapour detection system of earthquake precursors as claimed in claim 1, it is characterized in that comprising the steps: the air intake opening (2) with the mercury vapour pick-up unit (14) described in the sample gas inflow of mercury vapour, flow through described gas channel (1), mercury vapour is absorbed by the golden membranous layer (53) of described mercury detecting sensor (5), golden membranous layer (53) resistance increases, the resistance variations signal of golden membranous layer (53) flows to described testing circuit (15), circuit (15) process after testing, finally obtain the content value of mercury vapour in sample gas, remaining gas in sample gas is discharged from the gas outlet (3) of mercury vapour pick-up unit (14), after described mercury detecting sensor (5) completes a mercury vapour detection, electrified regulation circuit described in connection, electrified regulation is carried out to described nickel chromium triangle rete (55), to discharge the mercury absorbed by the golden membranous layer (53) of described mercury detecting sensor (5), the golden membranous layer of mercury detecting sensor (5) (53) is made to get back to original state.
7. mercury vapour detection method according to claim 6, it is characterized in that being provided with mercury reference sensor (6) in described gas channel (1), described mercury detecting sensor (5) and mercury reference sensor (6) are arranged on end face and the bottom surface of described gas channel (1) face-to-face, and mercury reference sensor (6) is connected with described testing circuit (15); described mercury vapour detection method comprises the steps: the air intake opening (2) with the mercury vapour pick-up unit (14) described in the sample gas inflow of mercury vapour, flow through described gas channel (1), the golden membranous layer (53) of described mercury detecting sensor (5) absorbs the mercury vapour in sample gas, golden membranous layer (53) resistance increases, the resistance variations signal of golden membranous layer (53) flows to described testing circuit (15), described mercury reference sensor (6) can not absorb the mercury vapour in sample gas, but the signal exported along with the temperature variation mercury reference sensor (6) of sample gas can change, the signal that mercury reference sensor (6) exports also flows to described testing circuit (15), the signal that testing circuit (15) is sent here according to the resistance variations signal of the golden membranous layer (53) of the mercury detecting sensor (5) received and mercury reference sensor (6) processes, the resistance value of the golden membranous layer (53) by mercury detecting sensor (5) is increased and in the sample gas that obtains the content value of mercury vapour carry out temperature compensation, finally obtain the mercury vapour content value eliminating temperature impact.
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| CN109425566A (en) * | 2017-08-21 | 2019-03-05 | 中科京投环境科技江苏有限公司 | A kind of performance test methods of mercury adsorbent material |
| CN112098496A (en) * | 2020-04-20 | 2020-12-18 | 杭州超钜科技有限公司 | Mercury measuring instrument with temperature compensation and regeneration functions and mercury measuring method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1004650B (en) * | 1986-02-03 | 1989-06-28 | 甘肃有色金属地质研究所 | Method of making gas-sensitive gold-film element used in mercury determination apparatus |
| CN203630078U (en) * | 2013-12-17 | 2014-06-04 | 杭州超距科技有限公司 | Earthquake precursor field mercury gas detection system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1004650B (en) * | 1986-02-03 | 1989-06-28 | 甘肃有色金属地质研究所 | Method of making gas-sensitive gold-film element used in mercury determination apparatus |
| CN203630078U (en) * | 2013-12-17 | 2014-06-04 | 杭州超距科技有限公司 | Earthquake precursor field mercury gas detection system |
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