CN106840939A - A kind of ambient air quality comprehensive assessment monitoring device - Google Patents
A kind of ambient air quality comprehensive assessment monitoring device Download PDFInfo
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- CN106840939A CN106840939A CN201710064066.0A CN201710064066A CN106840939A CN 106840939 A CN106840939 A CN 106840939A CN 201710064066 A CN201710064066 A CN 201710064066A CN 106840939 A CN106840939 A CN 106840939A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The present invention discloses a kind of ambient air quality comprehensive assessment monitoring device.It includes circuit module and at least three quartz crystal microbalance sensors modified by mutually different metal coating.Circuit module includes start-oscillation circuit, temperature compensating crystal oscillator chip, MUX, two frequency counters, Temperature Humidity Sensor, microcontroller and pin-saving chips.The quantity of start-oscillation circuit is identical with the quantity of quartz crystal microbalance sensor.The present invention can be detected or monitored to various ingredients in environmental gas, evaluation criteria of the quality incrementss of the unit area produced in a measure the cycle internal cause corrosion using the metal coating of quartz crystal microbalance sensor as gas pollutant, so as to be classified to gas pollutant, the comprehensive assessment to ambient air quality is realized.
Description
Technical field
The present invention relates to a kind of ambient air quality comprehensive assessment monitoring device, more particularly to cultural relics in the collection of cultural institution air quality
Real-time monitoring.
Background technology
Historical relic is non-renewable, is not recycled, and under complicated, moist gaseous environment, cultural relics in the collection of cultural institution is highly prone to
Corrosion and destruction, so, the ambient air quality residing for cultural relics in the collection of cultural institution must have effective evaluation measures.
The equipment of existing detection air quality is the unit interval according to quartz crystal microbalance sensor metal coating
Corrosion thickness as ambient air quality evaluation criteria.Although the thickness of metal erosion and corrosion rate correlation,
But it is unable to accurate characterization corrosion rate.Additionally, its product cannot be monitored to organic pollution, and the product power consumption is high, number
Sent according to by wired internet, be not suitable for the use of the environment such as museum.
The content of the invention
For the above-mentioned deficiency of prior art, the technical problems to be solved by the invention are to provide a kind of ambient air quality
Comprehensive assessment monitoring device, its with the metal coating of quartz crystal microbalance sensor in a measure the cycle unit area because
Corrode the quality incrementss for producing as standard, influence of the monitoring of environmental air to the corrosion rate of different plating filmed metals is realized
Comprehensive assessment to ambient air quality.
The present invention solves the technological means taken of its technical problem：
Ambient air quality comprehensive assessment monitoring device of the present invention includes circuit module and the micro- day of at least three quartz crystals
Sensor, each quartz crystal microbalance sensor is modified by mutually different metal coating；The circuit module includes starting of oscillation
Circuit, temperature compensating crystal oscillator chip, MUX, two frequency counters, Temperature Humidity Sensor, microcontroller and data storage cores
Piece；The quantity of the start-oscillation circuit is identical with the quantity of the quartz crystal microbalance sensor；The output end of each start-oscillation circuit
Connection corresponding with each input of MUX, the control end of MUX is connected with microcontroller, MUX
Output end is connected with the input of frequency counter one of them described, the input of another frequency counter and temperature compensation
The output end connection of crystal oscillator chip, the output end of each frequency counter is connected with microcontroller, Temperature Humidity Sensor it is defeated
Go out end to be connected with microcontroller, pin-saving chip is connected with microcontroller；The microcontroller according to below equation (1)~
(3) the corrosion reaction accumulation equivalent of the metal coating for obtaining the quartz crystal microbalance sensor is calculated：
Δ f=fCurrently-fHistory (3)
In formula (1)~(3), Δ m represents the metal coating of quartz crystal microbalance sensor in a measure the cycle
Corrosion reaction accumulation equivalent；Δ f represented in a measure the cycle, the frequency variation of quartz crystal microbalance sensor；ρqTable
Show the density of the crystal-vibration-chip of quartz crystal microbalance sensor；dqRepresent the thickness of the crystal-vibration-chip of quartz crystal microbalance sensor
Degree；fInitiallyRepresent the frequency that quartz crystal microbalance sensor is obtained when measuring first time；；fCurrentlyFor QCM is passed
The current frequency of sensor；fHistoryRepresent in the current frequency fCurrentlyThe measurement moment push away a same a period of time for measure the cycle forward
Carve, the frequency of quartz crystal microbalance sensor；fTemperature compensationIt is the frequency of temperature compensating crystal oscillator chip；CSensorFor QCM is passed
The frequency count of sensor, CTemperature compensationIt is the frequency count of temperature compensating crystal oscillator chip, k1It is temperature compensation coefficient, T is the temperature of air
Degree, k2It is humidity penalty coefficient, H is the humidity of air.
Further, the metal coating of wherein three quartz crystal microbalance sensors of the invention be respectively silver, copper,
Lead.
Further, present invention additionally comprises wireless transmission circuit, the wireless transmission circuit is connected with microcontroller.
Further, present invention additionally comprises electric power management circuit, the electric power management circuit is connected with microcontroller.
Further, present invention additionally comprises power sense circuit, the power sense circuit is connected with microcontroller.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention is with a measure the cycle, the metal coating of the quartz crystal microbalance sensor of unit area because
Corrode the quality incrementss of generation as the evaluation criteria of rate of metal corrosion, it is faster as metal erosion than using metal erosion thickness
The evaluation criteria of rate is more directly, definitely.
(2) present invention overcomes existing product using the mutually different quartz crystal microbalance sensor of multiple plating filmed metals
The defect that cannot be estimated to organic pollution, realizes main to sulfurous pollutants, inorganic pollution and organic pollution etc.
The effective detection of pollutant is wanted, according to the grade to sulfurous pollutants, inorganic pollution and organic pollution come comprehensive assessment ring
The air quality in border.
(3) in the dormancy period of monitoring device of the present invention, electric power management circuit closes the power supply of most of circuit, greatly
Reduce power consumption, reduce the number of times that museum's scene switch cabinet changes battery, be conducive to monitoring for a long time.
Brief description of the drawings
Fig. 1 is a kind of structural representation of implementation method of ambient air quality comprehensive assessment monitoring device of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, technical scheme is explained.
As shown in figure 1, ambient air quality comprehensive assessment monitoring device of the present invention mainly includes circuit module 2 and at least three
Individual quartz crystal microbalance sensor 1.Wherein, each quartz crystal microbalance sensor 1 is modified by mutually different metal coating；
Circuit module 2 includes that start-oscillation circuit 21, temperature compensating crystal oscillator chip 22,23, two frequency counters 24, humiture of MUX are passed
Sensor 26, microcontroller 25 and pin-saving chip 27.The quantity of start-oscillation circuit 21 and the number of quartz crystal microbalance sensor 1
Amount is identical.The connection corresponding with each input of MUX 23 of the output end of each start-oscillation circuit 21, the control of MUX 23
End processed is connected with microcontroller 25, and the output end of MUX 23 is connected with the input of one of frequency counter 24,
The input of another frequency counter 24 is connected with the output end of temperature compensating crystal oscillator chip 22, the output end of each frequency counter 24
It is connected with microcontroller 25, the output end of Temperature Humidity Sensor 26 is connected with microcontroller 25, pin-saving chip 27 and micro-control
Device processed 25 is connected.
Wherein, microcontroller 25 is calculated according to below equation (1)~(3) and obtains the quartz crystal microbalance sensor
The corrosion reaction accumulation equivalent of metal coating：
Δ f=fCurrently-fHistory (3)
In formula (1)~(3), Δ m represents the metal coating of quartz crystal microbalance sensor in a measure the cycle
Corrosion reaction accumulation equivalent, it refers to the metal of the quartz crystal microbalance sensor of unit area in a measure the cycle
The quality incrementss that plated film is produced by corrosion；Δ f represents in a measure the cycle that the frequency of quartz crystal microbalance sensor becomes
Change amount；ρqRepresent the density of the crystal-vibration-chip of quartz crystal microbalance sensor；dqRepresent the crystal oscillator of quartz crystal microbalance sensor
The thickness of piece；fInitiallyRepresent the frequency that quartz crystal microbalance sensor is obtained when measuring first time；fHistoryRepresent in current frequency
Rate fCurrentlyThe measurement moment push away a synchronization for measure the cycle, the frequency of quartz crystal microbalance sensor forward；fCurrentlyFor
The current frequency of quartz crystal microbalance sensor；fTemperature compensationIt is the frequency of temperature compensating crystal oscillator chip；CSensorFor QCM is passed
The frequency count of sensor, CTemperature compensationIt is the frequency count of temperature compensating crystal oscillator chip, k1It is temperature compensation coefficient, T is the temperature of air
Degree, k2It is humidity penalty coefficient, H is the humidity of air.
In a sealed meter environment, the temperature of environment where quartz crystal microbalance sensor is changed, measurement is quartzy at each temperature
The frequency of crystal microbalance sensor, accordingly obtains with the temperature of environment as abscissa, with quartz crystal microbalance sensor
Frequency is the series of points of ordinate, and the slope of the fitting a straight line of these points is temperature compensation coefficient k1。
In a sealed meter environment, change the humidity of environment where quartz crystal microbalance sensor, measure quartz under each humidity
The frequency of crystal microbalance sensor, accordingly obtains with the humidity of environment as abscissa, with quartz crystal microbalance sensor
Frequency is the series of points of ordinate, and the slope of the fitting a straight line of these points is humidity penalty coefficient k2。
As the preferred embodiment of the present invention, when wherein there is three metal coatings of quartz crystal microbalance sensor 1
Respectively silver, copper, lead when, corrosion rate of the monitoring of environmental air to silver is come with the corrosion reaction accumulation equivalent of silver coating, it is and silver-colored
Corrosion mainly caused by sulfurous pollutants, i.e., it is dirty with the sulfur-bearing in the corrosion reaction accumulation equivalent Evaluation Environment air of silver coating
Dye thing；Corrosion rate of the monitoring of environmental air to copper is come with the corrosion reaction accumulation equivalent of plated copper film, and the corrosion of copper it is main by
Inorganic pollution is caused, i.e., with the inorganic pollution in the corrosion reaction accumulation equivalent Evaluation Environment air of plated copper film；Plated with lead
The corrosion reaction accumulation equivalent of film carrys out corrosion rate of the monitoring of environmental air to lead, and the corrosion of lead is mainly made by organic pollution
Into that is, with the organic pollution in the corrosion reaction accumulation equivalent Evaluation Environment air of lead plated film.
In order to connect host computer, the operations such as storage, management and the display of data are carried out, the present invention can also further include nothing
Line transmission circuit 29, wireless transmission circuit 29 is connected with microcontroller 25, host computer respectively, so that microcontroller 25 passes through
Wireless transmission circuit 29 is connected with host computer.Pin-saving chip 27 stores the packet from microcontroller 25, and will storage
Packet be sent to wireless transmission circuit 29, then host computer is delivered a packet to by wireless transmission circuit 29, for display
Device interface carries out follow-up display operation.
The present invention can also further include electric power management circuit 210, and electric power management circuit 210 is connected with microcontroller 25
Connect.Electric power management circuit 210 provides power supply for each module, is controlled by microcontroller 25, carries out low-power consumption management, so that using electricity
Power management circuits 210 reduce the power consumption of monitoring device of the present invention, so as to monitoring of environmental air quality for a long time.
Further, the present invention can also further include power sense circuit 28, power sense circuit 28 and microcontroller
25 connections, it is possible thereby to the supply voltage of electric power management circuit 210 is monitored, the time of prompting changing battery.
The work of ambient air quality comprehensive assessment monitoring device of the present invention is illustrated with a specific embodiment below
Process.In this embodiment, quartz crystal microbalance sensor 1 is three, the metal coating of quartz crystal microbalance sensor 1
Respectively silver, copper, lead.It is described as follows：
In the present embodiment, three start-oscillation circuits 21 in circuit module 2 respectively sense three QCMs
Device 1 produces vibration, sends three tunnel frequency of oscillation data signals to MUX 23, the control MUX of microcontroller 25
23, select the signal of silver-plated quartz crystal microbalance sensor, output to one of frequency counter 24, the frequency counting
Device 24 draws the count value C of the road frequency of oscillation data signalSilver-plated sensor；Temperature compensating crystal oscillator chip 22 sends the frequency of the 10MHZ of stabilization
To another frequency counter 24, the frequency counter 24 show that the frequency of oscillation of temperature compensating crystal oscillator chip 22 is digital to be believed rate data signal
Number count value CIt is steady to mend, Temperature Humidity Sensor 26 obtains the humidity H of air, temperature T, and by CSilver-plated sensor、CIt is steady to mend, H, T be sent to it is micro-
Controller 25, microcontroller 25 is correspondingly made available equation below (4) according to formula (2), so as to calculate silver-plated quartz-crystal
The current frequency of body microbalance sensor：
Wherein, fCurrentlyIt is the current frequency of silver-plated quartz crystal microbalance sensor；fTemperature compensationIt is the frequency of temperature compensating crystal oscillator chip
Rate, in the present embodiment, fTemperature compensationIt is 10MHz；CSilver-plated sensorIt is the frequency count of silver-plated quartz crystal microbalance sensor, CIt is steady to mendFor
The frequency count of temperature compensating crystal oscillator chip, k1It is temperature compensation coefficient；T is the temperature of air；k2It is humidity penalty coefficient；H is sky
The humidity of gas.
Obtain the current frequency f of silver-plated quartz crystal microbalance sensorCurrentlyAfterwards, microcontroller 25 passes through data storage
Chip 27 extracts the historical frequency f of the silver-plated quartz crystal microbalance sensor 1 of previous measure the cycleHistory.In the present invention
In, can be with 30 days for a measure the cycle, every the once silver-plated quartz crystal microbalance sensor 1 of measurement in 0.5 hour
Frequency, current frequency fCurrentlyThe measurement moment push away forward 30 days synchronization frequency measurement as historical frequency fHistory.Example
Such as, current frequency fCurrentlyThe measurement moment be on May 31 8:00, then frequency fHistoryThe measurement moment be on May 18:00.Need
Bright, a measure the cycle is not limited to 30 days, and those skilled in the art can according to their needs determine a measure the cycle
Length, for example, it is also possible to 15 days, 40 days, 60 days etc. be a measure the cycle.
Frequency f according to quartz crystal microbalance sensorHistoryWith current frequency fCurrently, and then obtain one using formula (2)
The frequency variation Δ f of quartz crystal microbalance sensor 1 silver-plated in individual measure the cycle, is then updated to formula (1) by Δ f
In, that is, obtain the corrosion reaction accumulation equivalent Δ m of the silver coating of silver-plated quartz crystal microbalance sensor 1.
Then, the control of microcontroller 25 MUX 23 selects copper-plated quartz crystal microbalance sensor 1 as defeated
Go out signal, similarly, the corrosion reaction of the plated copper film of copper-plated quartz crystal microbalance sensor 1 is obtained according to formula (1)~(3)
Accumulation equivalent Δ m.
And then, the quartz crystal microbalance sensor of the control selection lead plating of MUX 23 of microcontroller 25 is used as output
Signal, similarly, the corruption with the lead plated film of the upper quartz crystal microbalance sensor 1 that lead plating is similarly obtained according to formula (1)~(3)
Erosion reaction accumulation equivalent Δ m.
Obtain the corrosion reaction accumulation equivalent of silver-plated, copper facing, the metal coating of the quartz crystal microbalance sensor 1 of lead plating
(mg/m2) after, the table of comparisons 1, the corrosion reaction accumulation equivalent correspondence of the metal coating according to each quartz crystal microbalance sensor 1
Air quality grade carry out the integrated air quality of comprehensive assessment environment.
Table 1
The current frequency of the quartz crystal microbalance sensor 1 that microcontroller 25 will be obtained, corrosion reaction accumulation equivalent, sky
The data such as gas credit rating are packaged into packet, are stored in pin-saving chip 27.When the present invention calculates the micro- day of quartz crystal again
During the data such as corrosion reaction accumulation equivalent, the air quality grade of the metal coating of sensor 1, this packet will be used as history
Data are used for microcontroller 25.
Meanwhile, this packet is sent to computer terminal by microcontroller 25 by wireless transmission circuit, by display circle
Face show silver-plated, copper facing, the corrosion reaction accumulation equivalent curve of the metal coating of the quartz crystal microbalance sensor of lead plating and
Air quality grade data.
Claims (5)
1. a kind of ambient air quality comprehensive assessment monitoring device, it is characterized in that：Including circuit module (2) and at least three quartz
Crystal microbalance sensor (1), each quartz crystal microbalance sensor (1) is modified by mutually different metal coating；The electricity
Road module (2) including start-oscillation circuit (21), temperature compensating crystal oscillator chip (22), MUX (23), two frequency counters (24),
Temperature Humidity Sensor (26), microcontroller (25) and pin-saving chip (27)；The quantity of the start-oscillation circuit (21) with it is described
The quantity of quartz crystal microbalance sensor (1) is identical；The output end of each start-oscillation circuit (21) is each with MUX (23)
Input correspondence is connected, and the control end of MUX (23) is connected with microcontroller (25), the output of MUX (23)
End be connected with the input of frequency counter one of them described (24), the input of another frequency counter (24) and
The output end connection of temperature compensating crystal oscillator chip (22), the output end of each frequency counter (24) is connected with microcontroller (25),
The output end of Temperature Humidity Sensor (26) is connected with microcontroller (25), and pin-saving chip (27) is with microcontroller (25) even
Connect；The microcontroller (25) calculates the metal for obtaining the quartz crystal microbalance sensor according to below equation (1)~(3)
The corrosion reaction accumulation equivalent of plated film：
Δ f=fCurrently-fHistory (3)
In formula (1)~(3), Δ m represents the corrosion of the metal coating of quartz crystal microbalance sensor in a measure the cycle
Reaction accumulation equivalent；Δ f represented in a measure the cycle, the frequency variation of quartz crystal microbalance sensor；ρqRepresent stone
The density of the crystal-vibration-chip of English crystal microbalance sensor；dqRepresent the thickness of the crystal-vibration-chip of quartz crystal microbalance sensor；fInitially
Represent the frequency that quartz crystal microbalance sensor is obtained when measuring first time；；fCurrentlyIt is quartz crystal microbalance sensor
Current frequency；fHistoryRepresent in fCurrentlyThe measurement moment push away a synchronization for measure the cycle forward, QCM is passed
The frequency of sensor；fTemperature compensationIt is the frequency of temperature compensating crystal oscillator chip；CSensorIt is the frequency count of quartz crystal microbalance sensor, CTemperature compensation
It is the frequency count of temperature compensating crystal oscillator chip, k1It is temperature compensation coefficient, T is the temperature of air, k2It is humidity penalty coefficient, H is
The humidity of air.
2. ambient air quality comprehensive assessment monitoring device according to claim 1, it is characterized in that：Wherein three quartz-crystals
The metal coating of body microbalance sensor (1) is respectively silver, copper, lead.
3. ambient air quality comprehensive assessment monitoring device according to claim 1 and 2, it is characterized in that：Also include wireless
Transmission circuit (29), the wireless transmission circuit (29) is connected with microcontroller (25).
4. ambient air quality comprehensive assessment monitoring device according to any one of claim 1 to 3, it is characterized in that：Also
Including electric power management circuit (210), the electric power management circuit (210) is connected with microcontroller (25).
5. ambient air quality comprehensive assessment monitoring device according to any one of claim 1 to 4, it is characterized in that：Also
Including power sense circuit (28), the power sense circuit (28) is connected with microcontroller (25).
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| CN201710064066.0A CN106840939A (en) | 2017-01-25 | 2017-01-25 | A kind of ambient air quality comprehensive assessment monitoring device |
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| CN201710064066.0A CN106840939A (en) | 2017-01-25 | 2017-01-25 | A kind of ambient air quality comprehensive assessment monitoring device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110108536A (en) * | 2019-06-18 | 2019-08-09 | 中国计量大学 | A kind of standard board manufacturing method compared for settled date mirror area gray scale detection |
| CN110553976A (en) * | 2019-10-09 | 2019-12-10 | 浙江中控技术股份有限公司 | method and device for detecting environmental corrosion rate |
| CN114323215A (en) * | 2021-12-28 | 2022-04-12 | 上海裕达实业有限公司 | Quartz crystal microbalance measurement and control device and measurement method |
| CN114441426A (en) * | 2021-12-22 | 2022-05-06 | 中国兵器工业第五九研究所 | Environmental effect monitoring devices and system |
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