CN103234691A - Greenhouse plant leaf air saturation vapor pressure deficit measuring device and measuring method - Google Patents
Greenhouse plant leaf air saturation vapor pressure deficit measuring device and measuring method Download PDFInfo
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- CN103234691A CN103234691A CN2013101465209A CN201310146520A CN103234691A CN 103234691 A CN103234691 A CN 103234691A CN 2013101465209 A CN2013101465209 A CN 2013101465209A CN 201310146520 A CN201310146520 A CN 201310146520A CN 103234691 A CN103234691 A CN 103234691A
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Abstract
The invention relates to the technical field of agricultural environment measurement, in particular to a greenhouse plant leaf air saturation vapor pressure deficit measuring device and measuring method. The greenhouse plant leaf air saturation vapor pressure deficit measuring device comprises a leaf blade upper surface measuring unit and a leaf blade lower surface measuring unit which are in vertical arrangement through a suction component or a clamping component, wherein the temperature of the leaf blade upper and lower surfaces is measured through a contact type temperature sensor and of the leaf blade upper surface measuring unit and a second temperature sensor of the leaf blade lower surface measuring unit, the temperature of leaf blades is synthetically reflected, the accuracy is high, meanwhile, the temperature and the humidity of air near the leaf blades are accurately measured through an air temperature and humidity sensor, the leaf air saturation vapor pressure deficit is accurately obtained through the calculation of a first microprocessor, the measuring precision is high, and reliable data support is provided for greenhouse environment regulation and control, disease prevention and water stress.
Description
Technical field
The present invention relates to the agricultural environment field of measuring technique, relate in particular to a kind of hothouse plants leaf gas saturation vapour differential pressure measurement device and measuring method.
Background technology
The fundamental purpose of greenhouse regulation and control is to create good light, temperature, water, gas, fertile condition for growing of crop, when needed results crop high-quality, high yield in the phase.Wherein, according near the plant canopy blade or leaf gas saturation vapour pressure reduction (the vapor pressure deficit that obtains of greenhouse humiture, write a Chinese character in simplified form: vpd) be to influence the plant stomata motion and reflect current or the rising flow of water important parameter of accumulation crop, compare traditional humidity parameter control and have very big meaning at aspects such as humidity regulation, prevention of damage by disease, irrigation managements.How accurately obtaining leaf gas saturation vapour pressure reduction in greenhouse becomes the key of greenhouse regulation and control.Need accurately to measure plant leaf blade surface temperature and plant canopy aerial temperature and humidity from implementation and could accurately obtain leaf gas saturation vapour pressure reduction, seldom leaf gas saturation vapour pressure reduction is lacked equipment targetedly as its regulation index and the parameter measurement of leaf gas saturation vapour pressure reduction in the greenhouse regulation and control at present, the regulation and control of greenhouse are the measurements that directly relies on aerial temperature and humidity at present, and segmentation sets up regulation index to carry out environment control.
Application number is that 201110363670.6 Chinese invention patent application " based on chamber crop growth and the environmental information detection method of many heat transfer agents " is by measurement plant canopy temperature, temperature in conjunction with greenhouse, humidity information, obtain saturation vapour pressure reduction, be used for the foundation of water stress index model, but this method is not on the one hand owing to be that the temperature by accurate measurement blade and near obtain the canopy blade air humidity obtain leaf gas saturation vapour pressure, thereby it is low to be used for greenhouse regulation and control accuracy according to its saturation vapour pressure reduction that obtains, can only reflect the saturation vapour pressure reduction in the current greenhouse roughly, this method does not provide the device that can measure leaf gas saturation vapour pressure yet on the other hand.
At present, measurement for leaf temperature, a kind of mode is by setting up leaf chamber or air chamber subsidiary monitoring leaf temperature when measuring parameter such as photosynthetic transpiration, is that the Chinese patent application " photosynthetic analyzer " of ZL200520111943.8 and Granted publication number are the Chinese patent of CN2563574Y " blade difference instrument " as the patent No..But, this mode is not in order to obtain leaf gas saturation vapour pressure reduction to the measurement purpose of leaf temperature on the one hand, this mode is by setting up leaf chamber monitoring leaf temperature on the other hand, blade does not contact with the external world, artificial mode changes gas flow rate, if long term monitoring is truly to reflect the greenhouse leaf temperature, the leaf temperature that records according to this kind mode causes the calculating of leaf gas saturation vapour pressure reduction incorrect for calculating leaf gas saturation vapour pressure missionary society.
Another kind of mode is to contact to obtain the blade surface temperature value with blade surface by digital temperature chip, thermal resistance, number is that the Chinese patent " plant leaf surface temperature sensing transmitter " of CN2596339Y and Granted publication number are the Chinese patent of CN201688925U " a kind of plant leaf temperature measuring instrument " as Granted publication.But the blade metering system of this contact is often only measured blade upper surface temperature, and blade bottom environment measurement also is important parameter, so this mode can not reflect the blade integral temperature, if remove to calculate leaf gas saturation vapour pressure reduction according to the leaf temperature that this kind mode records, the leaf gas saturation vapour pressure difference that then obtains also is inaccurate, simultaneously, the measuring system that this mode adopts is independently, and the purpose of measuring leaf temperature is not to be in order to obtain leaf gas saturation vapour pressure reduction.
Therefore, at above deficiency, the invention provides a kind of hothouse plants leaf gas saturation vapour differential pressure measurement device and measuring method.
Summary of the invention
(1) technical matters that will solve
The objective of the invention is to solve prior art middle period gas saturation vapour pressure reduction and obtain the inaccurate technical matters of measurement that lacks equipment targetedly and existing plant leaf temperature.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of hothouse plants leaf gas saturation vapour differential pressure measurement device, it comprises by the blade upper surface measuring unit of adhesive parts or hold assembly upper and lower settings and blade lower surface measuring unit, the aerial temperature and humidity sensor that is connected successively during described blade upper surface measuring unit comprises first cavity and is arranged on described first cavity, first microprocessor and contact type temperature sensor, the position relative with described contact type temperature sensor, the bottom surface of described first cavity is provided with opening, the position relative with described aerial temperature and humidity sensor, the top of described first cavity is provided with ventilation mouth, described blade lower surface measuring unit comprises second cavity and second temperature sensor that is arranged in described second cavity, described second temperature sensor is connected with described first microprocessor, and the position relative with described second temperature sensor, the top of described second cavity is provided with opening.
Wherein, also comprise first signal transmission assembly that is arranged in described first cavity and the secondary signal transmission assembly that is arranged in described second cavity, described first signal transmission assembly comprises first radio frequency chip and first antenna that is connected, described secondary signal transmission assembly comprises second radio frequency chip and second antenna that is connected, described first antenna is connected with described second antenna wireless, described first radio frequency chip is connected with described first microprocessor, and described second radio frequency chip is connected with described second temperature sensor.
Wherein, second radio frequency chip is connected with described second temperature sensor by second microprocessor.
Wherein, also comprise the first energy conversion assembly, the described first energy conversion assembly comprises that first electromagnetic energy and the heat energy that are connected obtain change-over circuit and first booster circuit, described first electromagnetic energy is obtained change-over circuit with heat energy and is connected with described first antenna, and described first booster circuit is connected with described aerial temperature and humidity sensor, described first microprocessor and described first radio frequency chip respectively.
Wherein, also comprise the second energy conversion assembly, the described second energy conversion assembly comprises that second electromagnetic energy and the heat energy that are connected obtain change-over circuit and second booster circuit, described second electromagnetic energy is obtained change-over circuit with heat energy and is connected with described second antenna, and described second booster circuit is connected with described second temperature sensor, described second microprocessor and described second radio frequency chip respectively.
Wherein, also comprise solar panel, described solar panel is connected with described first booster circuit.
Wherein, described first microprocessor is connected with warning piece, and described warning piece is arranged on the top of first cavity.
Wherein, also comprise frequency read/write, described frequency read/write is connected with described second antenna with described first antenna respectively.
Wherein, described adhesive parts comprise the first adhesive sheet that is arranged in described first cavity and are arranged in described second cavity the second adhesive sheet with the described first adhesive sheet adhesive.
The present invention also provides a kind of and has utilized above-mentioned leaf gas saturation vapour differential pressure measurement device to carry out leaf gas saturation vapour differential pressure measurement method, may further comprise the steps:
S1. described blade upper surface measuring unit and described blade lower surface measuring unit are clamped in the upper and lower surface of blade respectively by adhesive parts or hold assembly;
S2. provide electric energy to make it in running order for described blade upper surface measuring unit and described blade lower surface measuring unit, obtain near the aerial temperature and humidity temperature of temperature, blade upper surface of blade lower surface and the blade by second temperature sensor, contact type temperature sensor and aerial temperature and humidity sensor respectively, and send near the aerial temperature and humidity measured value temperature of the temperature of blade lower surface, blade upper surface and the blade to first microprocessor;
S3. calculate blade upper surface leaf temperature difference by first microprocessor and blade lower surface leaf temperature is poor, if the absolute value of both differences is more than or equal to 1 ℃, then with the temperature value of blade upper surface as the leaf temperature value; If the absolute value of both difference is less than 1 ℃, then with the mean value of the temperature value of the temperature value of blade upper surface and blade lower surface as the leaf temperature value;
S4. according to aerial temperature and humidity and leaf temperature, get leafing gas saturation vapour pressure reduction by first microprocessor.
Wherein, the measured temperature of blade lower surface is sent to first microprocessor by second radio frequency chip, second antenna, first antenna and first radio frequency chip that connects successively among the described step S2.
Wherein, in described step S2, by solar electrical energy generation or/and thermo-electric generation provides electric energy for aerial temperature and humidity sensor, first microprocessor and first radio frequency chip; Provide electric energy by thermo-electric generation for the second temperature temperature sensor and second radio frequency chip.
Wherein, also comprise step S5: read the leaf gas saturation vapour pressure reduction that first microprocessor obtains by frequency read/write.
(3) beneficial effect
Technique scheme of the present invention has following advantage: hothouse plants leaf gas saturation vapour differential pressure measurement device provided by the invention is by arranging blade upper surface measuring unit and blade lower surface measuring unit, measure the temperature of blade upper surface and the temperature of blade lower surface respectively by the contact type temperature sensor of blade upper surface measuring unit and second temperature sensor of blade lower surface measuring unit, can the concentrated expression leaf temperature, the accuracy height, accurately measure near the blade aerial temperature and humidity by the aerial temperature and humidity sensor simultaneously, temperature value according to measured blade upper surface, near the temperature value of blade lower surface and the blade aerial temperature and humidity value has accurately obtained leaf gas saturation vapour pressure reduction by the calculating of first microprocessor, the measuring accuracy height is the greenhouse regulation and control, prevention of damage by disease and water stress provide reliable data to support.
Description of drawings
Fig. 1 is embodiment of the invention leaf gas saturation vapour differential pressure measurement device annexation synoptic diagram;
Fig. 2 is the inner structure synoptic diagram of embodiment of the invention blade upper surface measuring unit;
Fig. 3 is the perspective view of the embodiment of the invention first cavity;
Fig. 4 is the embodiment of the invention first cavity superstructure synoptic diagram;
Fig. 5 is embodiment of the invention blade lower surface measuring unit inner structure synoptic diagram.
Among the figure, 1: blade upper surface measuring unit; 2: blade lower surface measuring unit; 3: contact type temperature sensor; 4: the first radio frequency chips; 5: first circuit board; 6: the first antennas; 7: the first adhesive sheets; 8: the aerial temperature and humidity sensor; 9: first microprocessor; 10: the first cavitys; 11: ventilation mouth; 12: solar panel; 13: warning piece; 14: the second temperature sensors; 15: the second radio frequency chips; 16: second circuit board; 17: the second antennas; 18: the second adhesive sheets; 19: the second microprocessors.
Embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, hothouse plants leaf gas saturation vapour differential pressure measurement device provided by the invention comprises blade upper surface measuring unit 1 and the blade lower surface measuring unit 2 by adhesive parts or hold assembly upper and lower settings, the aerial temperature and humidity sensor 8 that is connected successively during described blade upper surface measuring unit 1 comprises first cavity 10 and is arranged on described first cavity 10, first microprocessor 9 and contact type temperature sensor 3, the position relative with described contact type temperature sensor, the bottom surface of described first cavity 10 is provided with opening, the top of described first cavity 10 and described aerial temperature and humidity sensor 8 relative positions are provided with ventilation mouth 11, described blade lower surface measuring unit 2 comprises second cavity and second temperature sensor 14 that is arranged in described second cavity, described second temperature sensor 14 is connected with described first microprocessor 9, and the position relative with described second temperature sensor 14, the top of described second cavity is provided with opening.
Specifically, the preferred circular cavity body structure of the structure of first cavity 10 and second cavity, has the rectangular cavities structure that is communicated with it in the inboard of circular cavity, first cavity, 10 tops have first cavity, 10 loam cakes, the rectangular cavities structure of first cavity 10 is used for placing aerial temperature and humidity sensor 8, first microprocessor 9, contact type temperature sensor 3, the rectangular cavities structure of second cavity is used for placing second temperature sensor 14, certainly, the structure of first cavity 10 and second cavity also can be the cavity body structure of disc, square shape sheet or other shapes; Second temperature sensor 14 is preferably the infrared thermopile sensor, also can select the sensor of contact type temperature sensor 3 or other types for use, when selecting the infrared thermopile sensor for use, because its measurement is the temperature of blade lower surface, be subjected to the influence of natural light little, it is more accurate to measure; Second temperature sensor 14 is connected wired modes such as can adopting data line with first microprocessor 9 and connects, and also can adopt wireless mode to connect; Described aerial temperature and humidity sensor 8 preferred miniature Temperature Humidity Sensor SHT25, described first microprocessor 9 is preferably microprocessor MSP30G2210, and second temperature sensor 14 is preferably infrared thermopile sensor TMP006; Aerial temperature and humidity sensor 8, first microprocessor 9, first radio frequency chip 4 and contact type temperature sensor 3 can be arranged on the first circuit board 5 in first cavity 10, wherein aerial temperature and humidity sensor 8 and first microprocessor 9 be arranged on first circuit board 5 above, first radio frequency chip 4 and contact type temperature sensor 3 can be arranged on first circuit board 5 below, second temperature sensor 14 can be arranged on the second circuit board 16 in second cavity.
Like this, near air themperature value and the humidity value H the blade canopy that records of aerial temperature and humidity sensor 8
AirCan be passed to first microprocessor 9, the blade upper surface temperature that contact type temperature sensor 3 records can be passed to first microprocessor 9, the blade underlaying surface temperature that second temperature sensor 14 records can be passed to first microprocessor 9, first microprocessor 9 can calculate the leaf gas saturation vapour pressure value of plant according to the measured value that receives then, specifically, at first calculate blade upper surface leaf temperature difference △ T
Up, blade lower surface leaf temperature difference △ T
DownIf, | △ T
Up-△ T
Down| 〉=1 ℃, then leaf temperature value T selects the upper surface temperature value, if | △ T
Up-△ T
Down|＜1 ℃, then leaf temperature value T gets the mean value of blade upper surface temperature and blade underlaying surface temperature, calculates leafing gas saturation vapour pressure value according to following formula then:
In the formula, H
AirBe air humidity, T is leaf temperature.
Like this, measurement mechanism of the present invention can the concentrated expression blade cortical environment up and down, the leaf gas saturation vapour pressure difference that calculates has higher accuracy, directly reflects near the ambient conditions the plant leaf blade.
As Fig. 1, Fig. 2 and shown in Figure 5, further, when second temperature sensor 14 adopts wireless mode to be connected with first microprocessor 9, leaf gas saturation vapour differential pressure measurement device comprises first signal transmission assembly that is arranged in described first cavity 10 and the secondary signal transmission assembly that is arranged in described second cavity, described first signal transmission assembly comprises first radio frequency chip 4 and first antenna 6 that is connected, described secondary signal transmission assembly comprises second radio frequency chip 15 and second antenna 17 that is connected, described first antenna 6 and 17 wireless connections of described second antenna, described first radio frequency chip 4 is connected with described first microprocessor 9, and described second radio frequency chip 15 is connected with described second temperature sensor 14.Described first radio frequency chip 4 and second radio frequency chip 15 are preferably RFID chip SL900A, and first antenna 6 and second antenna 17 are preferably the Wound-rotor type antenna.First radio frequency chip 4 and second radio frequency chip 15 can be separately positioned on the first circuit board 5 and second circuit board 16 on, first antenna 6 and second antenna 17 can be separately positioned in the circular cavity of first cavity 10 and second cavity.Like this, by first antenna 6 and 17 wireless connections of described second antenna, realized the wireless transmission of information, with respect to wired connection, made that the measurement mechanism assembling is simple, measurement is not limited by the position, is convenient to measure and is suitable for multiple blade measure.
Further, second radio frequency chip 15 is connected with described second temperature sensor 14 by second microprocessor 19, being convenient to the infrared thermopile sensor like this is connected with described second radio frequency chip 15, second microprocessor 19 is preferably microprocessor MSP30G2210, can be arranged on the second circuit board 16, certainly, second microprocessor 19 also can have with the same function of first microprocessor 9 and is used for calculating leaf gas saturation vapour pressure difference.
As shown in Figure 1, further, hothouse plants leaf gas saturation vapour differential pressure measurement device provided by the invention also comprises the first energy conversion assembly, the described first energy conversion assembly comprises that first electromagnetic energy and the heat energy that are connected obtain change-over circuit and first booster circuit, can be arranged on the first circuit board 5, described first electromagnetic energy is obtained change-over circuit with heat energy and is connected with described first antenna 6, and described first booster circuit is connected with described aerial temperature and humidity sensor 8, described first microprocessor 9 and described first radio frequency chip 4 respectively.Like this, first electromagnetic energy and heat energy obtain change-over circuit can the perception blade by first antenna 6 and the temperature difference of air, obtaining change-over circuit by first electromagnetic energy and heat energy then is connected with first booster circuit, can realize thermo-electric generation, for aerial temperature and humidity sensor 8, first microprocessor 9 and first radio frequency chip 4 provide electric energy.
Equally, hothouse plants leaf gas saturation vapour differential pressure measurement device provided by the invention also comprises the second energy conversion assembly, the described second energy conversion assembly comprises that second electromagnetic energy and the heat energy that are connected obtain change-over circuit and second booster circuit, can be arranged on the second circuit board 16, described second electromagnetic energy is obtained change-over circuit with heat energy and is connected with described second antenna 17, and described second booster circuit is connected with described second temperature sensor 14, described second microprocessor 19 and described second radio frequency chip 15 respectively.Like this, second electromagnetic energy and heat energy obtain change-over circuit can the perception blade by second antenna 17 and the temperature difference of air, obtaining change-over circuit by second electromagnetic energy and heat energy then is connected with second booster circuit, can realize thermo-electric generation, for second temperature sensor 14, second microprocessor 19 and second radio frequency chip 15 provide electric energy.So just do not need external power supply or built-in power, realize the power self-support of measurement mechanism.
As shown in Figure 1 and Figure 4, further, leaf gas saturation vapour differential pressure measurement device also comprises solar panel 12, and described solar panel 12 is connected with described first booster circuit, and solar panel 12 is arranged on first cavity, 10 tops.Described solar panel 12 is selected non-crystal silicon solar cell plate 12 for use, like this, by solar panel 12, can realize solar electrical energy generation, for blade upper surface measuring unit 1 provides enough electric energy guarantees, in conjunction with the first energy conversion assembly and the second energy conversion assembly, make the measurement mechanism energy realize that on-the-spot various modes obtains, for measurement brings great convenience.
As shown in Figure 1 and Figure 4, further, described first microprocessor 9 is connected with warning piece 13, described warning piece 13 is arranged on the top of first cavity 10, described warning piece 13 comprises the leaded light ring and the LED lamp of different colours wherein is set, the LED lamp is connected with first microprocessor 9, and the leaded light ring is arranged on first cavity, 10 tops.Leaf gas saturation vapour pressure difference has bound, when transfiniting, gives the alarm, thereby can make things convenient for the greenhouse regulation and control, specifically, surpass last prescribing a time limit, then turn on red alarm LED lamp, surpass down in limited time, then turn on yellow alarm LED lamp, and then leaf gas saturation vapour pressure reduction is regulated.
As shown in Figure 1, further, leaf gas saturation vapour differential pressure measurement device also comprises frequency read/write, and described frequency read/write is connected with described second antenna 17 with described first antenna 6 respectively.Frequency read/write is fixed or mobile RFID read-write equipment, send instruction and can read the data message that measurement mechanism records for measurement mechanism of the present invention by frequency read/write, pass through frequency read/write in addition, also can improve the convenience that measurement mechanism uses for measurement mechanism provides stable electromagnetic-energy.
As Fig. 2 and shown in Figure 5, further, the adhesive parts comprise and are arranged on the first adhesive sheet 7 in described first cavity 10 and are arranged in described second cavity the second adhesive sheet 18 with 7 adhesives of the described first adhesive sheet.The first adhesive sheet 7 and the second adhesive sheet 18 can be flat thin magnet, also can one be flat thin magnet, another is iron plate or steel disc.The number of the first adhesive sheet 7 is preferably four, is distributed on the bottom of first cavity 10, and it is corresponding with the position of the first adhesive sheet 7 that the second adhesive sheet 18 is arranged in second cavity.By the adhesive parts are set, the drawback of avoiding traditional folder formula to install significantly reduces measurement mechanism volume and weight, does not influence the daily physiological activity of plant, the convenient installation.
In addition, provided by the inventionly utilize above-mentioned leaf gas saturation vapour differential pressure measurement device to carry out leaf gas saturation vapour differential pressure measurement method, it may further comprise the steps:
S1. described blade upper surface measuring unit 1 and described blade lower surface measuring unit 2 are clamped in the upper and lower surface of blade respectively by adhesive parts or hold assembly;
S2. provide electric energy to make it in running order for described blade upper surface measuring unit 1 and described blade lower surface measuring unit 2, obtain near the aerial temperature and humidity temperature of temperature, blade upper surface of blade lower surface and the blade by second temperature sensor 14, contact type temperature sensor 3 and aerial temperature and humidity sensor 8 respectively, and send near the aerial temperature and humidity measured value temperature of the temperature of blade lower surface, blade upper surface and the blade to first microprocessor 9;
S3. calculate blade upper surface leaf temperature difference by first microprocessor 9 and blade lower surface leaf temperature is poor, if the absolute value of both differences is more than or equal to 1 ℃, then with the temperature value of blade upper surface as the leaf temperature value; If the absolute value of both difference is less than 1 ℃, then with the mean value of the temperature value of the temperature value of blade upper surface and blade lower surface as the leaf temperature value;
S4. according to aerial temperature and humidity and leaf temperature, get leafing gas saturation vapour pressure reduction by first microprocessor 9.
Further, the measured temperature of blade lower surface is sent to first microprocessor 9 by second radio frequency chip 15, second antenna 17, first antenna 6 and first radio frequency chip 4 that connects successively among the described step S2, in described step S2, can can certainly adopt solar electrical energy generation or thermo-electric generation to provide electric energy for aerial temperature and humidity sensor 8, first microprocessor 9 and first radio frequency chip 4 simultaneously by solar electrical energy generation or thermo-electric generation for aerial temperature and humidity sensor 8, first microprocessor 9 and first radio frequency chip 4 provide electric energy; Also can provide electric energy for second temperature sensor 14 and second radio frequency chip 15 by thermo-electric generation.
Further, also comprise step S5: read the leaf gas saturation vapour pressure reduction that first microprocessor 9 obtains by frequency read/write and read the leaf gas saturation vapour pressure reduction that first microprocessor 9 obtains by frequency read/write.
In sum, hothouse plants leaf gas saturation vapour differential pressure measurement device provided by the invention and measuring method, second temperature sensor 14 of the contact type temperature sensor 3 by blade upper surface measuring unit 1 and blade lower surface measuring unit 2 is measured the temperature of blade upper and lower surfaces, the concentrated expression leaf temperature, the accuracy height, accurately measure near the aerial temperature and humidity of blade by aerial temperature and humidity sensor 8 simultaneously, calculating by first microprocessor 9 has accurately obtained leaf gas saturation vapour pressure reduction, measuring accuracy height; Realized the wireless transmission of information between blade upper surface measuring unit 1 and the blade lower surface measuring unit 2 by first signal transmission assembly and secondary signal transmission assembly, thereby make that the measurement mechanism assembling is simple, measurement is not limited by the position, is convenient to measure and is suitable for multiple blade measure; By the first energy conversion assembly, the second energy conversion assembly and solar panel 12, the power self-support of realization measurement mechanism and the on-the-spot various modes of the energy are obtained, for measurement brings great convenience; Be connected with described second antenna 17 with described first antenna 6 by frequency read/write, can send instruction and can read data message that measurement mechanism records and for measurement mechanism provides stable electromagnetic-energy, improve the convenience that measurement mechanism uses to measurement mechanism.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (13)
1. hothouse plants leaf gas saturation vapour differential pressure measurement device, it is characterized in that: it comprises by the blade upper surface measuring unit (1) of adhesive parts or hold assembly upper and lower settings and blade lower surface measuring unit (2), the aerial temperature and humidity sensor (8) that is connected successively during described blade upper surface measuring unit (1) comprises first cavity (10) and is arranged on described first cavity (10), first microprocessor (9) and contact type temperature sensor (3), the position relative with described contact type temperature sensor (3), the bottom surface of described first cavity (10) is provided with opening, the position relative with described aerial temperature and humidity sensor (8), the top of described first cavity (10) is provided with ventilation mouth (11), described blade lower surface measuring unit (2) comprises second cavity and second temperature sensor (14) that is arranged in described second cavity, described second temperature sensor (14) is connected with described first microprocessor (9), and the position relative with described second temperature sensor (14), the top of described second cavity is provided with opening.
2. vapour pressure difference measurements device according to claim 1, it is characterized in that: also comprise first signal transmission assembly that is arranged in described first cavity (10) and the secondary signal transmission assembly that is arranged in described second cavity, described first signal transmission assembly comprises first radio frequency chip (4) and first antenna (6) that is connected, described secondary signal transmission assembly comprises second radio frequency chip (15) and second antenna (17) that is connected, described first antenna (6) and described second antenna (17) wireless connections, described first radio frequency chip (4) is connected with described first microprocessor (9), and described second radio frequency chip (15) is connected with described second temperature sensor (14).
3. vapour pressure difference measurements device according to claim 2 is characterized in that: described second radio frequency chip (15) is connected with described second temperature sensor (14) by second microprocessor (19).
4. vapour pressure difference measurements device according to claim 3, it is characterized in that: also comprise the first energy conversion assembly, the described first energy conversion assembly comprises that first electromagnetic energy and the heat energy that are connected obtain change-over circuit and first booster circuit, described first electromagnetic energy is obtained change-over circuit with heat energy and is connected with described first antenna (6), and described first booster circuit is connected with described aerial temperature and humidity sensor (8), described first microprocessor (9) and described first radio frequency chip (4) respectively.
5. vapour pressure difference measurements device according to claim 4, it is characterized in that: also comprise the second energy conversion assembly, the described second energy conversion assembly comprises that second electromagnetic energy and the heat energy that are connected obtain change-over circuit and second booster circuit, described second electromagnetic energy is obtained change-over circuit with heat energy and is connected with described second antenna (17), and described second booster circuit is connected with described second temperature sensor (14), described second microprocessor (19) and described second radio frequency chip (15) respectively.
6. vapour pressure difference measurements device according to claim 5, it is characterized in that: also comprise solar panel (12), described solar panel (12) is connected with described first booster circuit.
7. vapour pressure difference measurements device according to claim 6, it is characterized in that: described first microprocessor (9) is connected with warning piece (13), and described warning piece (13) is arranged on the top of first cavity (10).
8. vapour pressure difference measurements device according to claim 7, it is characterized in that: also comprise frequency read/write, described frequency read/write is connected with described second antenna (17) with described first antenna (6) respectively.
9. vapour pressure difference measurements device according to claim 1 is characterized in that: described adhesive parts comprise and are arranged on the first adhesive sheet (7) in described first cavity (10) and are arranged in described second cavity the second adhesive sheet (18) with described first adhesive sheet (7) adhesive.
10. method of utilizing each described leaf gas saturation vapour differential pressure measurement device of claim 1-9 to carry out leaf gas saturation vapour differential pressure measurement is characterized in that: may further comprise the steps:
S1. described blade upper surface measuring unit (1) and described blade lower surface measuring unit (2) are clamped in the upper and lower surface of blade respectively by adhesive parts or hold assembly;
S2. provide electric energy to make it in running order for described blade upper surface measuring unit (1) and described blade lower surface measuring unit (2), obtain near the aerial temperature and humidity temperature of temperature, blade upper surface of blade lower surface and the blade by second temperature sensor, contact type temperature sensor (3) and aerial temperature and humidity sensor (8) respectively, and send near the aerial temperature and humidity measured value temperature of the temperature of blade lower surface, blade upper surface and the blade to first microprocessor (9);
S3. calculate blade upper surface leaf temperature difference by first microprocessor (9) and blade lower surface leaf temperature is poor, if the absolute value of both differences is more than or equal to 1 ℃, then with the temperature value of blade upper surface as the leaf temperature value; If the absolute value of both difference is less than 1 ℃, then with the mean value of the temperature value of the temperature value of blade upper surface and blade lower surface as the leaf temperature value;
S4. according to aerial temperature and humidity and leaf temperature, get leafing gas saturation vapour pressure reduction by first microprocessor (9).
11. leaf gas saturation vapour differential pressure measurement method according to claim 10 is characterized in that: the measured temperature of blade lower surface is sent to first microprocessor (9) by second radio frequency chip (15), second antenna (17), first antenna (6) and first radio frequency chip (4) that connects successively among the described step S2.
12. leaf gas saturation vapour differential pressure measurement method according to claim 11, it is characterized in that: in described step S2, provide electric energy by solar electrical energy generation or/and thermo-electric generation is aerial temperature and humidity sensor (8), first microprocessor (9) and first radio frequency chip (4); Be that the second temperature temperature sensor and second radio frequency chip (15) provide electric energy by thermo-electric generation.
13. leaf gas saturation vapour differential pressure measurement method according to claim 11 is characterized in that: also comprise step S5: read the leaf gas saturation vapour pressure reduction that first microprocessor (9) obtains by frequency read/write.
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| CN106168822A (en) * | 2016-09-30 | 2016-11-30 | 深圳前海弘稼科技有限公司 | A kind of environmental control of greenhouse method, device and intelligent greenhouse |
| CN111363677A (en) * | 2019-04-17 | 2020-07-03 | 张兰英 | Automatic culture system and device for nostoc commune |
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| CN106168822A (en) * | 2016-09-30 | 2016-11-30 | 深圳前海弘稼科技有限公司 | A kind of environmental control of greenhouse method, device and intelligent greenhouse |
| WO2018058820A1 (en) * | 2016-09-30 | 2018-04-05 | 深圳前海弘稼科技有限公司 | Greenhouse environment regulation method, device and smart greenhouse |
| CN111363677A (en) * | 2019-04-17 | 2020-07-03 | 张兰英 | Automatic culture system and device for nostoc commune |
| CN111460377A (en) * | 2020-03-16 | 2020-07-28 | 华北水利水电大学 | Greenhouse crop canopy saturated water vapor pressure difference calculation method under sunny conditions |
| CN111693578A (en) * | 2020-06-11 | 2020-09-22 | 中国农业科学院农业信息研究所 | Crop growth information monitoring method and device and manufacturing method thereof |
| CN111693578B (en) * | 2020-06-11 | 2023-01-17 | 中国农业科学院农业信息研究所 | Crop growth information monitoring method and device and manufacturing method thereof |
| CN112524112A (en) * | 2020-11-27 | 2021-03-19 | 太重集团榆次液压工业有限公司 | Differential pressure output valve |
| CN112524112B (en) * | 2020-11-27 | 2023-02-03 | 太重集团榆次液压工业有限公司 | Differential pressure output valve |
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