CN104374730A - Air carbon dioxide concentration sensor suitable for high-humidity moisture condensation environment and method - Google Patents
Air carbon dioxide concentration sensor suitable for high-humidity moisture condensation environment and method Download PDFInfo
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- CN104374730A CN104374730A CN201410608478.2A CN201410608478A CN104374730A CN 104374730 A CN104374730 A CN 104374730A CN 201410608478 A CN201410608478 A CN 201410608478A CN 104374730 A CN104374730 A CN 104374730A
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Abstract
The invention discloses an air carbon dioxide concentration sensor suitable for a high-humidity moisture condensation environment and a method, belonging to the technical fields of automation and internet of things. The sensor mainly comprises an infrared carbon dioxide concentration probe (1), an electric heating element (2), an air chamber air temperature probe (3), a transmitter (4), a waterproof box (5) and an air temperature probe (6). The method mainly comprises the following steps: setting a fixed temperature difference value, and establishing an empirical equation based on an actual air temperature, a heated air temperature, and the concentration of carbon dioxide in heated air to calculate actual air carbon dioxide concentration. The air carbon dioxide concentration sensor and the method, disclosed by the invention, can be used for normally measuring the air carbon dioxide concentration in a high-humidity moisture condensation environment, and are suitable for production application such as edible fungi cultivation.
Description
One, art
Patent of the present invention relates to carbon dioxide sensor and the measuring method of the use of a kind of Internet of Things, is particularly applicable to continuous coverage air gas concentration lwevel under high humidity condensation environment and uses.
Two, technical background
The Automatic continuous of air gas concentration lwevel is measured, and is that Internet of Things needs perception important meteorologic factor, particularly very useful in agricultural production.But, the air gas concentration lwevel sensor of current employing is much adopt infrared gas sensitive element device as probe, by record Carbon Dioxide in Air, the uptake of Infrared and transit dose are measured to the concentration of carbon dioxide, if the excessive generation condensation of air humidity, the dewdrops on probe will have a strong impact on uptake and the transit dose of Infrared.Therefore, the gas concentration lwevel sensor of infrared type all has certain requirement for the relative air humidity of environment, and the control environment relative air humidity of institute's nominal is generally lower than 95RH%.But, in actual production, when air themperature reduces, be easy to occur that relative air humidity is increased to the 100RH% even situation of supersaturation condensation.Sensor probe, in the dew that can not evaporate for a long time, often can measure distortion, inefficacy.
In order to meet the continuous automatic measurement of air gas concentration lwevel of Internet of Things under high humidity or even condensation environment, the present invention proposes a new technical scheme.
Three, summary of the invention
The present invention patent discloses one under normal temperature high humidity or even condensation environment, can automatically, continuously, normally measure manufacture method and the operation method of air gas concentration lwevel device.Here so-called normal temperature refers in the temperature range of 0 DEG C to 50 DEG C Celsius, and so-called high humidity environment and relative air humidity are at the environment of 95RH% ~ 100RH%; So-called condensation environment, is exactly the supersaturation of water in air vapour, condenses out the environment of dew.
Patent of the present invention realizes above-mentioned purpose by the following technical solutions:
This air gas concentration lwevel product sensor comprises: concentration of infrared carbon dioxide probe (1), electrical heating elements (2), air chamber air temperature probe (3), transmitter (4), compartment (5), air themperature probe (6).
Described concentration of infrared carbon dioxide probe (1), mainly comprises air chamber (11), light source (12), infrared light power meter (13).
Described transmitter (4) comprises transmitter chip (41), Transmitter Line plate (42), input-output line (43).
Described concentration of infrared carbon dioxide probe (1) is all arranged in compartment (5) with transmitter (4), concentration of infrared carbon dioxide probe (1) is electrically connected with transmitter (4), air chamber air temperature probe (3) is arranged on outside air chamber (11) blow vent of concentration of infrared carbon dioxide probe (1), electrical heating head (2) is arranged on air chamber air temperature probe (3) outside, electrical heating elements (2) is electrically connected with transmitter (4), air chamber air temperature probe (3) and transmitter (4) electrically connect, air themperature probe (6) is arranged on compartment (5) and is electrically connected with transmitter (4) outward.
Transmitter chip (41) electrical connection is fixed on Transmitter Line plate (42), Transmitter Line plate (42) is fixed in compartment (5), and input-output line (44) penetrates in compartment (5) and is electrically connected with Transmitter Line plate (42).
Described transmitter chip (41), comprises top control module (411), fixing temperature approach setting module (412), atmospheric environment actual air temperature sensing module (413), air chamber air themperature sensing module (414), electrical heating elements control module (415), air chamber air gas concentration lwevel sensing module (416), atmospheric environment actual air carbon dioxide concentration calculation module (417), atmospheric environment actual air gas concentration lwevel data transmission blocks (418).
The invention provides the implementation method of survey calculation air gas concentration lwevel, comprise after powering on to air concentration of infrared carbon dioxide sensor, transmitter (4) starts the air that electrical heating elements (2) starts to heat near the ventilating opening of air chamber (11), transmitter (4) obtains the temperature of air again from air themperature probe (3) of compartment (5) outside, an intensification target temperature is set according to atmospheric environment actual temperature value, transmitter (4) monitors air chamber air temperature probe (3) with reference to this intensification target temperature, the heating of electrical heating elements (2) is stopped when air chamber air temperature probe (3) temperature perceived near air chamber (11) ventilating opening raises and reaches intensification target temperature.Air chamber (11) is flowed into after temperature near air chamber (11) ventilating opening is heated, because the elevate air relative humidity of air themperature decreases, inevitable lower than 100RH%, avoid the phenomenon occurring condensation, light source (12) and the infrared power meter (13) of concentration of infrared carbon dioxide probe (1) carry out the measurement of gas concentration lwevel for the air heated up in air chamber (11).The measurement data of intensification air gas concentration lwevel is sent to transmitter (4) by concentration of infrared carbon dioxide probe (1), air themperature data under the atmospheric environment that the same period measures by air themperature probe (6) also send to transmitter (4), the data that transmitter chip (41) calculates actual environment air gas concentration lwevel according to the gas concentration lwevel of intensification air, the air themperature of air, the intensification target temperature of setting export to host computer, and one-shot measurement work completes.
1. relative air humidity height is relevant with air themperature, and air themperature raises then relative air humidity and declines.Patent of the present invention makes the relative air humidity entering air chamber (11) can't condense lower than 100RH% all the time by adding hot-air; thus the impact that protection air gas concentration lwevel sensing probe (1) is not condensed; so ensure that air gas concentration lwevel sensor normally under high humidity and condensation environment can measure air gas concentration lwevel, this builds significant to the Internet of Things under high humidity condensation environment.
2. the rule that changes according to CO2 concentration after the thermal effect of infrared type air gas concentration lwevel sensing probe and air heats of patent of the present invention, by set up empirical model and measurement environment air actual temperature, setting fixed temperature poor, control air heat after temperature, utilize transmitter (4) to carry out dynamic calculation numerical compensation, thus correctly can monitor the gas concentration lwevel of air.
Four, accompanying drawing explanation
Fig. 1 is the vertical view of patent of the present invention, describes the relative position of composition and the structural attitude, particularly electrical heating elements (2) of patent of the present invention, air chamber air temperature probe (3) and air chamber (11);
Fig. 2 is the process flow diagram of patent air carbon dioxide concentration measurement of the present invention, describes the method for the calculating air gas concentration lwevel of patent of the present invention.
Five, embodiment
Be described further below in conjunction with the concrete enforcement of accompanying drawing to patent of the present invention:
As shown in Figure 1, patent of the present invention comprises: concentration of infrared carbon dioxide probe (1), electrical heating elements (2), air chamber air temperature probe (3), transmitter (4), compartment (5), air themperature probe (6).
The outer wall of compartment (5) arranges air hole, and the air under atmospheric environment can flow freely in compartment (5).Transmitter Line plate (42) is fixedly mounted in compartment (5), transmitter chip (41) is fixed on the side away from compartment (5) air hole on Transmitter Line plate (42), input-output line (44) is electrically connected with Transmitter Line plate (42), then passes compartment (5) outward.Be fixed on Transmitter Line plate (42) by concentration of infrared carbon dioxide probe (1), air chamber (11) is arranged on the side of compartment (5) air hole.Concentration of infrared carbon dioxide probe (1) is electrically connected with transmitter (4), air chamber air temperature probe (3) is arranged on outside air chamber (11) blow vent of interior concentration of infrared carbon dioxide probe (1) of compartment (5), electrical heating head (2) is arranged on air chamber air temperature probe (3) outside, electrical heating elements (2) is electrically connected with transmitter (4), air themperature probe (3) and transmitter (4) electrically connect, and air themperature probe (6) is arranged on compartment (5) and is electrically connected with transmitter (4) outward.
The invention provides the implementation method of survey calculation air gas concentration lwevel, as shown in Figure 2, comprise the following steps:
Step S1: power up and add hot-air, that is,
This air carbon dioxide sensor obtains DC power supply, and each parts start.Top control module (411) is to electrical heating elements (2) energising, and electrical heating elements (2) starts heating.
Step S2: fixing temperature approach setting, that is,
The fixing temperature approach setting module (412) of transmitter chip (11) stores the default value of a fixing temperature approach, fixing temperature approach can be set in 3 degrees Celsius in 15 degree Celsius range, top control module (411) can receive by input-output line (13) the new setting value that host computer sends, then fixing temperature approach is stored in fixing temperature approach setting module (411), in order to calling.
Step S3: atmospheric environment actual air temperature sensing, that is,
Atmospheric environment actual air temperature sensing module (412) obtains from atmospheric environment actual air temperature from air themperature probe (6), submits to top control module (411).
Step S4: calculate intensification target temperature, that is,
Top control module (411) extracts fixing temperature approach in fixing temperature approach setting module (411), again according to atmospheric environment actual air temperature, calculate intensification target temperature, its formula is: intensification target temperature (DEG C)=atmospheric environment actual air temperature (DEG C)+fixing temperature approach (DEG C).The fixing temperature approach of such as setting is 5 degrees Celsius, and atmospheric environment is actual is 20 degrees Celsius, then intensification target temperature can be set as 25 degrees Celsius, and atmospheric environment is actual is for another example 30 degrees Celsius, then intensification target temperature can be set as 35 degrees Celsius.
Step S5: read hot air temperature near air chamber, that is,
Top control module (411) asks for air temperature value near air chamber to air chamber air themperature sensing module (414), and air chamber air themperature sensing module (414) obtains air temperature value near air chamber from air chamber air temperature probe (3) and sends to top control module (411).
Step S6: judge whether to need to add hot-air, that is,
Air temperature value near air chamber and intensification target temperature compare by top control module (411), judge conclusion.If air temperature value is less than intensification target temperature near air chamber, perform step S7, if air temperature value equals to be greater than intensification target temperature near air chamber, perform step S8.
Step S7: continue to add hot-air, that is,
Top control module (411) keeps to electrical heating elements (2) energising, and electrical heating elements (2) continues heating, and work air temperature rising near 1 second to 5 second rear gas chamber, goes to step S5.
Step S8: stop adding hot-air, that is,
If air temperature value is equal to or greater than intensification target temperature near air chamber, top control module (411) is to electrical heating elements (2) power-off, and heating stops, and goes to step S9.
Step S9: read intensification air gas concentration lwevel, that is,
Top control module (411) asks for air chamber air gas concentration lwevel to air chamber air gas concentration lwevel sensing module (416), air chamber air gas concentration lwevel sensing module (416) obtains air chamber air carbon dioxide concentration measurement value from concentration of infrared carbon dioxide probe (1), then submits to top control module (411).
Step S10: calculate atmospheric environment actual air gas concentration lwevel, that is,
The data of intensification air gas concentration lwevel, intensification target temperature, the fixing temperature difference are given atmospheric environment actual air carbon dioxide concentration and are calculated module (417) by top control module (411).Atmospheric environment actual air carbon dioxide concentration is calculated module (417) and is utilized preset formula to calculate.Computing formula is the empirical model obtained by many experiments: atmospheric environment actual air gas concentration lwevel (mg/kg)=constant term A0+ coefficient A1 is multiplied by intensification air gas concentration lwevel (mg/kg)+coefficient A2 and is multiplied by atmospheric environment actual air temperature (DEG C)+coefficient A3 and is multiplied by fixing temperature approach (DEG C).Wherein constant term A0, coefficient A1, coefficient A2, coefficient A3 can according to the real air temperature scope of atmospheric environment by experiment data carry out multiple regression matching and obtain.Atmospheric environment actual air carbon dioxide concentration is calculated module (417) and result of calculation is returned to top control module (411).
Step S11: export atmospheric environment actual air gas concentration lwevel, that is,
Atmospheric environment actual air gas concentration lwevel is sent to host computer by input-output line (43) by top control module (411), and one-shot measurement work completes.
The announcement of book and statement according to the above description, the technician in field described in patent of the present invention can also carry out changing and revising for above-mentioned embodiment.Therefore, the embodiment disclosing above patent of the present invention is not limited to and state, some modifications and changes for patent of the present invention also should fall in the protection domain of claim of patent of the present invention.In addition, although more practical specific terms in this instructions, these terms just for convenience of description, do not form any restriction to patent of the present invention.
Claims (2)
1. the air gas concentration lwevel sensor under a high humidity condensation environment, it is characterized in that, comprise concentration of infrared carbon dioxide probe (1), electrical heating elements (2), air chamber air temperature probe (3), transmitter (4), compartment (5), air themperature probe (6).
2. concentration of infrared carbon dioxide probe (1) and transmitter (4) are all arranged in compartment (5) as claimed in claim 1, concentration of infrared carbon dioxide probe (1) is electrically connected with transmitter (4), air chamber air temperature probe (3) is arranged on outside air chamber (11) blow vent of concentration of infrared carbon dioxide probe (1), electrical heating elements (2) is arranged on air chamber air temperature probe (3) outside, electrical heating elements (2) is electrically connected with transmitter (4), air chamber air temperature probe (3) and transmitter (4) electrically connect, air themperature probe (6) is arranged on compartment (5) and is electrically connected with transmitter (4) by data line outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410608478.2A CN104374730A (en) | 2014-10-28 | 2014-10-28 | Air carbon dioxide concentration sensor suitable for high-humidity moisture condensation environment and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410608478.2A CN104374730A (en) | 2014-10-28 | 2014-10-28 | Air carbon dioxide concentration sensor suitable for high-humidity moisture condensation environment and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769955A (en) * | 2015-11-25 | 2017-05-31 | 优胜光分联营公司 | For the air chamber of absorption spectrometry |
| CN107860738A (en) * | 2017-12-26 | 2018-03-30 | 吉林大学 | A kind of infrared CO of facilities horticulture with intelligent dehumidification function2Sensor and method |
-
2014
- 2014-10-28 CN CN201410608478.2A patent/CN104374730A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769955A (en) * | 2015-11-25 | 2017-05-31 | 优胜光分联营公司 | For the air chamber of absorption spectrometry |
| CN107860738A (en) * | 2017-12-26 | 2018-03-30 | 吉林大学 | A kind of infrared CO of facilities horticulture with intelligent dehumidification function2Sensor and method |
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Application publication date: 20150225 |