CN108956520A - The portable CO of seismic precursor mobile observation2Monitoring device and monitoring method - Google Patents
The portable CO of seismic precursor mobile observation2Monitoring device and monitoring method Download PDFInfo
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- CN108956520A CN108956520A CN201810617049.XA CN201810617049A CN108956520A CN 108956520 A CN108956520 A CN 108956520A CN 201810617049 A CN201810617049 A CN 201810617049A CN 108956520 A CN108956520 A CN 108956520A
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- 239000002243 precursor Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 65
- 238000000746 purification Methods 0.000 claims abstract description 35
- 238000012806 monitoring device Methods 0.000 claims abstract description 30
- 230000007613 environmental effect Effects 0.000 claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims description 26
- 238000002835 absorbance Methods 0.000 claims description 12
- 238000000862 absorption spectrum Methods 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000007791 dehumidification Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
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- 238000002715 modification method Methods 0.000 claims description 2
- 230000031700 light absorption Effects 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 15
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LDKDGDIWEUUXSH-UHFFFAOYSA-N Thymophthalein Chemical compound C1=C(O)C(C(C)C)=CC(C2(C3=CC=CC=C3C(=O)O2)C=2C(=CC(O)=C(C(C)C)C=2)C)=C1C LDKDGDIWEUUXSH-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 230000002547 anomalous effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 208000010247 contact dermatitis Diseases 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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Abstract
The present invention relates to a kind of seismic precursor mobile observations with portable CO2Monitoring device and monitoring method.Monitoring device includes air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve, purification device, gas outlet and governor circuit, air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve and gas outlet are sequentially connected, and purification device, the first, second solenoid valve and CO are also connected between the first solenoid valve and second solenoid valve2Sensing detection unit is connected with governor circuit respectively.The existing measurement gas circuit of the present invention has self calibration to recycle gas circuit, CO again2Sensing detection unit is based on infrared absorption principle and uses Integrated design, detects limit for height, fast response time, by measuring multiple parameters, to CO2Concentration value carries out environmental factor amendment, improves CO2The accuracy of Concentration Testing.The present invention is small in size, easy to carry, can use in the adverse circumstances of seismic precursor mobile observation point.
Description
Technical field
The present invention relates to a kind of CO2Monitoring device more particularly to a kind of portable CO of seismic precursor mobile observation2Monitoring
Device and monitoring method.
Background technique
It will affect CO in earthquake preparation and generating process2In the distribution and migration of earth's surface, change the CO in degassing of the crust2It releases
Dynamic is put, therefore monitors the CO of shear-zone, hot spring or hot well release2It dynamically, is the new way of Exploration of Earthquake Prediction.China has
The CO of limit2Dynamic monitoring data shows CO2In some MsThere is apparent anomalous reflection before >=4.0 earthquakes.Therefore, it establishes extensively
Underground fluid CO2Observation point is conducive to develop earthquake precursor observation technology.
Traditional seismic precursor flows CO2Observation mainly uses gas chromatography or chemical method.Gas chromatography is logical
Cross field sampling, laboratory testing obtains CO2Concentration, this method live cannot obtain concentration, and timeliness is poor and manually adopts
Sample error is larger.Chemical method is the measurement pipe by a kind of containing thymolphthalein, obtains CO by measurement pH value2Concentration, it is this
Method detection be a period of time accumulation, artificial estimation causes testing result error larger, therefore timeliness, accuracy are equal
It is poor.CO is measured using infrared sensor2Concentration is widely applied in industries such as environmental protection, safety, medical treatment, this method response
Fastly, can continuous observation and also measurement range it is wide, but be unable to satisfy bad environments, background concn in seismic precursor mobile observation
Demand low, measurement range is wide, low in energy consumption, small in size.
Summary of the invention
In order to solve the above-mentioned technical problem the present invention, provides a kind of seismic precursor mobile observation portable CO2Monitoring dress
It sets and monitoring method, monitoring device is small in size, and it is easy to carry, it can be used in the adverse circumstances of seismic precursor mobile observation point,
It is live to obtain CO in real time2Concentration value, timeliness is good, and accuracy is high.
Another object of the present invention is to provide a kind of portable CO of seismic precursor mobile observation2Monitoring device and monitoring side
Method, it is contemplated that environmental factor, to CO2Concentration value is modified, and improves CO2The accuracy and reliability of Concentration Testing.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals: seismic precursor of the invention
The portable CO of mobile observation2Monitoring device, including air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing
Detection unit, second solenoid valve, purification device, gas outlet and governor circuit, air inlet, the first solenoid valve, humidity reducing device, flow
Controller, CO2Sensing detection unit, second solenoid valve and gas outlet are sequentially connected, one end of purification device and described first
Solenoid valve is connected, and the other end of purification device is connected with the second solenoid valve, the first solenoid valve, second solenoid valve and CO2
Sensing detection unit is connected with governor circuit respectively.Air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing
Detection unit, second solenoid valve and gas outlet constitute measurement gas circuit；First solenoid valve, humidity reducing device, flow controller, CO2It passes
Sense detection unit, second solenoid valve and purification device are linked to be loop, constitute self calibration and recycle gas circuit.Two solenoid valves are opened
It closes and is controlled by governor circuit, purification device can absorb water vapour in gas, to improve the accuracy of detection.CO2Sensing detection
Unit is completed to absorb the conversion of light and electric signal, the reflection CO of output using infrared absorption spectrum principle2The sensing of concentration is believed
Number it is conveyed to governor circuit processing and display.In self calibration, purification device can absorb the CO in self calibration circulation gas circuit2Gas
Body realizes the zero gas calibration of sensor, to improve accuracy when subsequent detection.
Preferably, the purification device is an alkalinity purification pipe, it is internal to be filled with porous foams, porous bubble
Foam body is loaded with strong basicity particle, reaches and effectively absorbs CO2The purpose of gas.
Preferably, the diameter of the alkalinity purification pipe is 15~20mm, length is 4~5cm, the porous foam
The aperture of body is 300~500 μm.Absorb CO2Efficiency is up to the CO that can be fully absorbed in circulation gas circuit in 85%, 10 second2Gas.
Preferably, the humidity reducing device is a dehumidification pipe, it is internal filled with the dehumidizer that can restore dehumidifying rate.
The diameter of dehumidification pipe is 15mm~20mm, and length is 8~10cm, and effect on moisture extraction can be incited somebody to action up to 80% by means such as heating
Its water vapour absorbed vapors away, and restores dehumidifying rate.
Preferably, the CO2Sensing detection unit includes being formed by connecting by a hemisphere mask body and a plate
Shell and the infrared light supply and CO that are set in the housing2Concentrations detectors, the central point of hemisphere mask body is equipped with to be protruded outwardly
Inlet channel, the axis of inlet channel and the center line of hemisphere mask body are overlapped, inlet channel and the flow controller phase
Even, plate is equipped with the outlet passageway protruded outwardly, and outlet passageway is connected with the second solenoid valve, the infrared light supply
Be located on plate and and inlet channel face, the CO2Concentrations detectors are located on the inner wall of hemisphere mask body, CO2Concentration
Detector, infrared light supply are connected with the governor circuit respectively.CO2Sensing detection unit using infrared absorption spectrum principle and
Side stream type air chamber structure, CO2Concentrations detectors output reflection CO2The transducing signal of concentration, CO2Concentrations detectors are mounted in hemisphere face
On the inner wall of cover, it is located at plenum interior, avoids the interference by external environment, greatly improve response speed, CO2Concentration is visited
It surveys device and uses binary channels pyroelectric detector.Infrared light supply selects the radiation intensity height in lesser gas chamber and radiant power is stablized
Point light source, airflow direction and infrared light radiation direction increase and inhale on the contrary, infrared light and gas is made to have sufficient time of contact
Sensitivity is received, detector sensitivity and response time are improved.
Preferably, the inner wall of the hemisphere mask body is coated with mirror surface golden film, mirror surface golden film with a thickness ofRoughness is less than 1.5~2.0nm.It is realized by hemisphere mask body inner wall mirror surface golden film and infrared light supply is issued
Infrared light reflection, increase CO2Absorption light path, to improve detector sensitivity.
Preferably, being equipped with collection temperature detection, Humidity Detection and air pressure in the inlet channel is detected on integrated collection
At sensor, integrated sensor is connected with the governor circuit.It is small in size using integrated sensor, sample gas can be detected simultaneously
Temperature, humidity and atmospheric pressure value, after being conveyed to governor circuit, to realize the amendment of environmental factor, to obtain more accurate CO2
Concentration value improves CO2The accuracy of Concentration Testing improves the environmental suitability and environment interference free performance of monitoring device.
Preferably, the governor circuit includes single machine unit, data processing unit, touch display screen, GPS fixed
Position and provides the power supply unit of operating voltage, data processing unit, touch display screen and GPS positioning module for governor circuit at module
Be connected respectively with single machine unit, single machine unit respectively with the first solenoid valve, second solenoid valve and the CO2Sensing detection
Unit is connected, CO2The transducing signal of sensing detection unit output is connected with the data processing unit.Using at high speed,
High integration, low-power consumption, highly resistance damageability, multiplex roles microcontroller as single machine unit, in conjunction with embedded OS
And modularized design, realize single measurement, continuous measurement, data acquisition, display, man-machine interactive operation, data store and
System clock function.CO2Concentrations detectors output-response CO2The transducing signal of concentration is surveyed to data processing unit, integrated sensor
Temperature, humidity and the atmospheric pressure value obtained is also conveyed to data processing unit, corrects CO by environmental factor by data processing unit2It is dense
The absorbance of detector is spent, realizes CO2The environmental factor of concentration value is corrected, then send touch aobvious by processing by single machine unit
Display screen is shown.Storage circuit in governor circuit receives GPS positioning module data by IIC interface, fixed for field inspection point
Point observational record, facilitates Observation of fault activity data to analyze.Touch display screen, realize human-computer interaction, display measurement concentration value, unit,
The function menu of system time, environmental parameter and monitoring device.Power module is powered by rechargeable battery, and has been carried out under-voltage
Protection, overcurrent protection, antistatic design prevent input voltage extremely and cause subsequent core component damage, the exception in circuit short
Road causes electric current excessive and the phenomenon that circuit is caused to damage for Contact electrostatic breakdown IC chip.
The portable CO of seismic precursor mobile observation of the present invention2The monitoring method of monitoring device are as follows: air inlet, the first electromagnetism
Valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve and gas outlet constitute measurement gas circuit, described
First solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve and purification device, which are linked to be, to be closed back
Road constitutes self calibration and recycles gas circuit；When measurement, gas enters from air inlet, humidity reducing device is flowed by the first solenoid valve, by dropping
Wet device absorbs the water vapour in gas, passes through flow controller and flows into CO2Sensing detection unit, CO2Sensing detection unit is adopted
The conversion of absorption light and electric signal, output-response CO are completed with infrared absorption spectrum principle2The transducing signal of concentration is to described
Governor circuit, then gas flows through second solenoid valve and flows out from gas outlet；When self calibration, self calibration recycles the gas in gas circuit
It is circulated in loop, humidity reducing device absorbs the water vapour in gas, and purification device absorbs the CO in gas2Gas,
Purification device can fully absorb the CO in self calibration circulation gas circuit in 10 seconds2Gas, CO2 sensor responds zero gas concentration at this time
Sensor signal export to governor circuit, as the calibration factor of instrument, to improve the accuracy of detection.
Preferably, the CO2It is equipped with collection temperature detection, Humidity Detection and air pressure in sensing detection unit and is detected on one
The integrated sensor of body, integrated sensor are connected with the governor circuit；The monitoring method includes environmental factor amendment
Method: integrated sensor acquisition flows into CO2Temperature, humidity and the atmospheric pressure value of gas in sensing detection unit, and it is conveyed to master
Circuit is controlled, governor circuit corrects CO by environmental factor2The absorbance of sensing detection unit, it may be assumed that I=K × I0, wherein I is to repair
Absorbance after just, I0For CO2The absorbance that sensing detection unit is obtained by infrared absorption spectrum principle, K be environment because
Son finally obtains and passes through the modified CO of environmental factor2Concentration value.The amendment for realizing environmental factor, to obtain more accurate CO2
Concentration value improves CO2The accuracy of Concentration Testing improves the environmental suitability and environment interference free performance of monitoring device.
The beneficial effects of the present invention are: it is small in size, it is low in energy consumption, it is easy to carry, it can be in the evil of seismic precursor mobile observation point
It is used in bad environment, scene obtains CO in real time2Concentration value, timeliness is good, and accuracy is high.CO2Sensing detection unit is based on infrared suction
It receives principle and uses Integrated design, gas chamber built-in infrared light source, CO2Concentrations detectors, collection temperature, humidity and air pressure are detected on one
Integrated sensor, the air chamber structure combination mirror surface inner wall of side stream type, improve sensor detection limit, shorten response speed
Degree, while realizing measuring multiple parameters, using environmental factor to CO2Concentration value is modified, and improves CO2The accuracy of Concentration Testing,
Improve the environmental suitability and environment interference free performance of monitoring device.The present invention recycles gas circuit by self calibration and realizes auto zero gas
Calibration, further increases the accuracy and reliability of monitoring device.
Detailed description of the invention
Fig. 1 is a kind of system structure diagram of the invention.
Fig. 2 is CO in the present invention2A kind of schematic cross-sectional view of sensing detection unit.
Fig. 3 is a kind of circuit theory connection block diagram of governor circuit in the present invention.
1. air inlet in figure, 2. first solenoid valves, 3. humidity reducing devices, 4. flow controllers, 5.CO2Sensing detection unit,
6. second solenoid valve, 7. purification devices, 8. gas outlets, 9. single machine units, 10. data processing units, 11. touch display screens,
12.GPS locating module, 13. power supply units, 51. hemisphere mask bodies, 52. plates, 53. infrared light supplies, 54.CO2Concentration detection
Device, 55. inlet channels, 56. outlet passageways, 57. integrated sensors.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: the portable CO of the seismic precursor mobile observation of the present embodiment2Monitoring device, as shown in Figure 1, include into
Port 1, the first solenoid valve 2, humidity reducing device 3, flow controller 4, CO2Sensing detection unit 5, second solenoid valve 6, purification device
7, gas outlet 8 and governor circuit, air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit,
Two solenoid valves and gas outlet are sequentially connected, and one end of purification device is connected with the first solenoid valve, the other end of purification device and
Two solenoid valves are connected.Air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve
Measurement gas circuit is constituted with gas outlet；First solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, the second electromagnetism
Valve and purification device are linked to be loop, constitute self calibration and recycle gas circuit.For the dead volume for reducing measurement gas circuit, improves measurement and ring
Between seasonable, measurement air channels sampling flow is set to be fixed on 300~400ml/min, air circuit connection pipeline caliber by flow controller
Less than 3mm, the response time is measured less than 5 seconds.When carrying out self calibration, flow controller passes through recyclegas flow in adjusting to 30
~60ml/min improves the absorption efficiency of purification device, shortens the self calibration response time.
Humidity reducing device is the dehumidification pipe for absorbing water vapour in gas, and diameter 15mm~20mm, length is 8~10cm,
It is internal filled with the dehumidizer that can restore dehumidifying rate, and effect on moisture extraction is up to 80%.Purification device is CO in an absorption gas2
The alkalinity purification pipe of gas, internal to be filled with porous foams, porous foams is loaded with strong basicity particle, alkalinity purification pipe
Diameter be 15~20mm, length is 4~5cm, and the aperture of porous foams is 300~500 μm, absorbs CO2Efficiency is reachable
85%, the CO in circulation gas circuit can be fully absorbed in 10 seconds2Gas.
As shown in Fig. 2, CO2Sensing detection unit uses infrared absorption spectrum principle and side stream type air chamber structure, side stream type
The gas chamber of air chamber structure is an encapsulation hemisphere, and gas chamber includes being formed by connecting by a hemisphere mask body 51 and a plate 52
Shell, gas chamber is provided with infrared light supply 53 and CO2Concentrations detectors 54, the inner wall of hemisphere mask body are coated with mirror surface golden film, mirror
Face golden film with a thickness ofFor roughness less than 1.5~2.0nm, the central point of hemisphere mask body is connected with one outwardly
The inlet channel 55 of protrusion, the axis of inlet channel and the center line of hemisphere mask body are overlapped, inlet channel and flow controller
It is connected, an outlet passageway 56 protruded outwardly is housed on plate, outlet passageway is located at the side of plate, outlet passageway and second
Solenoid valve is connected, and infrared light supply is mounted on the middle position of plate and selects with inlet channel face, infrared light supply lesser
The point light source that radiation intensity is high in gas chamber and radiant power is stable, CO2Concentrations detectors are on the inner wall of hemisphere mask body, position
In plenum interior, the interference by external environment is avoided, greatly improves response speed, CO2Concentrations detectors use binary channels
Pyroelectric detector.Airflow direction and infrared light radiation direction increase on the contrary, infrared light and gas is made to have sufficient time of contact
Add absorption sensitivity, improves detector sensitivity and response time, response time T90≤ 15 seconds, measuring range be 0~
600000ppm, minimum resolution reach 10ppm, error≤reading 5%.Inlet channel is provided with collection temperature detection, humidity inspection
It surveys and air pressure is detected on integrated integrated sensor 57, the temperature range of integrated sensor is -40 DEG C~85 DEG C, temperature measurement accuracy
0.1 DEG C, humidity range 5~100%, relative humidity precision 5%, air pressure range is 300hPa~1100hPa, pressure precision
0.03hPa。
As shown in figure 3, governor circuit includes single machine unit 9, data processing unit 10, touch display screen 11, GPS fixed
Position and provides the power supply unit 13 of operating voltage, data processing unit, touch display screen and GPS positioning for governor circuit at module 12
Module is connected with single machine unit respectively, single machine unit output control signal respectively with the first solenoid valve, second solenoid valve,
Infrared light supply is connected, CO2The transducing signal that concentrations detectors, integrated sensor export is connected with data processing unit respectively.It adopts
Used high speed, high integration, low-power consumption, highly resistance damageability, multiplex roles microcontroller as single machine unit, in conjunction with insertion
Single measurement, continuous measurement, data acquisition, display, man-machine interactive operation, number are realized in formula operating system and modularized design
According to storage and system clock function.Single-chip microcontroller as main control chip selects ARM Cortex-M4 kernel
STM32F407VGT6 processor, the dominant frequency of 168Mhz, the SRAM of 192KB carry out data acquisition using on piece ADC, and resolution ratio is
12bit, sample rate 1Msps.On piece ADC converter acquires the electric signal of sensor, the data between processor and ADC converter
It is transmitted as DMA mode.Data are quickly transmitted using DMA mode, effectively mitigate system operations pressure.The software layer of processor uses
Embedded OS, strong real-time, function are more, define including single measurement, continuous measurement, data acquisition, show, man-machine
Interactive operation, data storage and 7 relatively independent tasks of system clock, these tasks by micro control system United Dispatching,
Distribute resource, coordinate the operation of each task, guarantee the efficient operation of system, at the same avoid a certain task error when caused by
Systemic breakdown.CO2Concentrations detectors output-response CO2What the transducing signal of concentration was measured to data processing unit, integrated sensor
Temperature, humidity and atmospheric pressure value are also conveyed to data processing unit, correct CO by environmental factor by data processing unit2Concentration is visited
Survey the absorbance of device, it may be assumed that I=K × I0, wherein I is revised absorbance, I0For CO2Concentrations detectors pass through infrared suction
The absorbance that spectral principle obtains is received, K is environmental factor, revised CO2Concentration value is conveyed to single machine unit, by monolithic
Machine unit send touch display screen to show again by processing.The environment under different temperatures, air pressure and damp condition is obtained by experiment
Data processing list is written then using the particular curve relationship showed between temperature, humidity, air pressure and environmental factor in factor K
In member.Data processing unit has storage circuit, and storage circuit is used to save all measurement data, and data are suitable according to the time
Sequence is transmitted to movable storage device.The storage circuit application USB serial data transmission technology of data processing unit, built-in FAT text
Part system, differential signal use designing impedance matching, realize that real time data automatically saves function.In addition, depositing in governor circuit
Storage road receives GPS positioning module data by IIC interface, records for field inspection point ocean weather station observation, facilitates Observation of fault activity
Data analysis.Touch display screen realizes human-computer interaction, display measurement concentration value, unit, system time, environmental parameter and prison
Survey the function menu of device.Power module is powered by rechargeable battery, and carried out under-voltage protection, overcurrent protection, antistatic are set
Meter, prevents input voltage extremely and causes that subsequent core component damage, the exception in circuit is short-circuit causes electric current excessive and contact
The phenomenon that moment electrostatic breakdown IC chip causes circuit to damage, power module have battery protecting circuit, pass through detection electricity
Pond electricity controls battery charge time and number, to protect battery, extends the service life of battery, can supply for systems stay
Electricity 15 hours or more.
The size of the portable CO2 monitoring device of the present embodiment is 75 × 140 × 190mm, weight < 1.5kg, power consumption < 4W.
The portable CO of above-mentioned seismic precursor mobile observation2The monitoring method of monitoring device are as follows: air inlet, the first electromagnetism
Valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve and gas outlet constitute measurement gas circuit；First electricity
Magnet valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve and purification device are linked to be loop, structure
Gas circuit is recycled at self calibration.
When measurement, infrared light supply is driven, gas enters from air inlet, humidity reducing device is flowed by the first solenoid valve, by dropping
Wet device absorbs the water vapour in gas, passes through flow controller and flows into CO2Sensing detection unit, CO2Sensing detection unit
The conversion of absorption light and electric signal, output-response CO are completed using infrared absorption spectrum principle2The transducing signal of concentration is to data
Processing unit, temperature, humidity and the atmospheric pressure value that integrated sensor measures also are conveyed to data processing unit, and then gas flows through
Two solenoid valves are simultaneously flowed out from gas outlet；Environmental factor modification method is realized by data processing unit: CO is corrected by environmental factor2
The absorbance of concentrations detectors, it may be assumed that I=K × I0, wherein I is revised absorbance, I0For CO2Concentrations detectors are logical
The absorbance of infrared absorption spectrum principle acquisition is crossed, K is environmental factor, finally obtains and passes through the modified CO of environmental factor2It is dense
Angle value is simultaneously conveyed to single machine unit, send touch display screen to show again by processing by single machine unit.
When self calibration, the gas in self calibration circulation gas circuit circulates in loop, and humidity reducing device absorbs gas
In water vapour, purification device absorb gas in CO2Gas, purification device can fully absorb self calibration circulation gas circuit in 10 seconds
In CO2Gas, at this time by the touch key-press in touch display screen by the CO of display2Concentration value is adjusted to zero-bit, realizes prison
Survey the zero gas calibration of device.
Monitoring device of the invention, it is small in size, it is low in energy consumption, it is easy to carry, it can be in the severe of seismic precursor mobile observation point
It is used in environment, scene obtains CO in real time2Concentration value, timeliness is good, and accuracy is high.CO2Sensing detection unit is based on infrared absorption
Principle uses Integrated design, gas chamber built-in infrared light source, CO2Concentrations detectors and collection temperature, humidity and air pressure are detected on one
Integrated sensor, the air chamber structure combination mirror surface inner wall of side stream type, improve sensor detection limit, shorten response speed
Degree, while realizing measuring multiple parameters, using environmental factor to CO2Concentration value is modified, and improves CO2The accuracy of Concentration Testing,
Improve the environmental suitability and environment interference free performance of monitoring device.The present invention recycles gas circuit by self calibration and realizes auto zero gas
Calibration, further increases the accuracy and reliability of monitoring device.
Claims (10)
1. a kind of portable CO of seismic precursor mobile observation2Monitoring device, it is characterised in that including air inlet, the first solenoid valve,
Humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve, purification device, gas outlet and governor circuit, air inlet
Mouth, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve and gas outlet are sequentially connected,
One end of purification device is connected with first solenoid valve, and the other end of purification device is connected with the second solenoid valve,
First solenoid valve, second solenoid valve and CO2Sensing detection unit is connected with governor circuit respectively.
2. the portable CO of seismic precursor mobile observation according to claim 12Monitoring device, it is characterised in that described
Purification device is an alkalinity purification pipe, and internal to be filled with porous foams, porous foams is loaded with strong basicity particle.
3. the portable CO of seismic precursor mobile observation according to claim 22Monitoring device, it is characterised in that described
The diameter of alkalinity purification pipe is 15~20mm, and length is 4~5cm, and the aperture of the porous foams is 300~500 μm.
4. the portable CO of seismic precursor mobile observation according to claim 12Monitoring device, it is characterised in that described
Humidity reducing device is a dehumidification pipe, internal filled with the dehumidizer that can restore dehumidifying rate.
5. the portable CO of seismic precursor mobile observation according to claim 1 or 2 or 42Monitoring device, it is characterised in that
The CO2Sensing detection unit includes the shell being formed by connecting by a hemisphere mask body and a plate and is set in the housing
Infrared light supply and CO2Concentrations detectors, the central point of hemisphere mask body are equipped with the inlet channel protruded outwardly, inlet channel
The center line of axis and hemisphere mask body is overlapped, and inlet channel is connected with the flow controller, and plate is equipped with towards evagination
Outlet passageway out, outlet passageway are connected with the second solenoid valve, and the infrared light supply is located on plate and and air inlet
Channel face, the CO2Concentrations detectors are located on the inner wall of hemisphere mask body, CO2Concentrations detectors, infrared light supply difference
It is connected with the governor circuit.
6. the portable CO of seismic precursor mobile observation according to claim 52Monitoring device, it is characterised in that described
The inner wall of hemisphere mask body is coated with mirror surface golden film, mirror surface golden film with a thickness ofRoughness less than 1.5~
2.0nm。
7. the portable CO of seismic precursor mobile observation according to claim 52Monitoring device, it is characterised in that described
It is equipped with collection temperature detection, Humidity Detection and air pressure in inlet channel and is detected on integrated integrated sensor, integrated sensor and institute
The governor circuit stated is connected.
8. the portable CO of seismic precursor mobile observation according to claim 1 or 2 or 42Monitoring device, it is characterised in that
The governor circuit includes single machine unit, data processing unit, touch display screen, GPS positioning module and is governor circuit
There is provided operating voltage power supply unit, data processing unit, touch display screen and GPS positioning module respectively with single machine unit phase
Even, single machine unit respectively with the first solenoid valve, second solenoid valve and the CO2Sensing detection unit is connected, CO2Sensing inspection
The transducing signal for surveying unit output is connected with the data processing unit.
9. a kind of portable CO of seismic precursor mobile observation as described in claim 12The monitoring method of monitoring device, it is special
Sign is the air inlet, the first solenoid valve, humidity reducing device, flow controller, CO2Sensing detection unit, second solenoid valve
Measurement gas circuit, first solenoid valve, humidity reducing device, flow controller, CO are constituted with gas outlet2Sensing detection unit,
Two solenoid valves and purification device are linked to be loop, constitute self calibration and recycle gas circuit；When measurement, gas enters from air inlet, warp
It crosses the first solenoid valve and flows into humidity reducing device, the water vapour in gas is absorbed by humidity reducing device, pass through flow controller and flow into CO2
Sensing detection unit, CO2Sensing detection unit is completed to absorb the conversion of light and electric signal, output using infrared absorption spectrum principle
React CO2The transducing signal of concentration gives the governor circuit, and then gas flows through second solenoid valve and flows out from gas outlet；From
When calibration, the gas in self calibration circulation gas circuit circulates in loop, and humidity reducing device absorbs the water vapour in gas,
Purification device absorbs the CO in gas2Gas, purification device can fully absorb the CO in self calibration circulation gas circuit in 10 seconds2Gas,
CO2 sensor exports the sensor signal that zero gas concentration responds to governor circuit at this time, the self calibration system as monitoring device
Number.
10. the portable CO of seismic precursor mobile observation according to claim 92The monitoring method of monitoring device, feature
It is the CO2It is equipped with collection temperature detection, Humidity Detection and air pressure in sensing detection unit and is detected on integrated integrated sensing
Device, integrated sensor are connected with the governor circuit；The monitoring method includes environmental factor modification method: integrated sensing
Device acquisition flows into CO2Temperature, humidity and the atmospheric pressure value of gas in sensing detection unit, and it is conveyed to governor circuit, master control electricity
Road CO is corrected by environmental factor2The absorbance of sensing detection unit, it may be assumed that I=K × I0, wherein I is revised light absorption
Degree, I0For CO2The absorbance that sensing detection unit is obtained by infrared absorption spectrum principle, K are environmental factor, are finally obtained
By the modified CO of environmental factor2Concentration value.
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| CN201810617049.XA CN108956520B (en) | 2018-06-14 | 2018-06-14 | Portable CO for dynamic observation of Megacurrent before earthquake2Monitoring device and monitoring method |
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