CN101949874A - Crop moisture detection device and method based on sensors - Google Patents
Crop moisture detection device and method based on sensors Download PDFInfo
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- CN101949874A CN101949874A CN2010102624919A CN201010262491A CN101949874A CN 101949874 A CN101949874 A CN 101949874A CN 2010102624919 A CN2010102624919 A CN 2010102624919A CN 201010262491 A CN201010262491 A CN 201010262491A CN 101949874 A CN101949874 A CN 101949874A
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Abstract
The invention discloses a crop moisture detection device based on a plurality of sensors, comprising a signal acquisition unit, a signal transformation unit and a signal analysis unit, wherein the signal acquisition unit is used for acquiring soil moisture content signals, solar radiation signals, leaf temperature and leaf surrounding air temperature signals and environmental temperature and humidity signals; the signal transformation unit is used for transforming the signals acquired by the signal acquisition unit; and the signal analysis unit calculates leaf-air temperature difference by the leaf temperature and leaf surrounding air temperature signals acquired through sensors of a same type, eliminates errors caused by the traditional leaf temperature acquisition and provides an ecological data set based on the motion trend of water in a soil-plant-air system by combining with the other signals so as to provide data reference for plant moisture detection. The invention can be used for accurately and losslessly detecting the moisture content of crops for a long time.
Description
Technical field
The present invention relates to the Agricultural Information technical field, particularly a kind of crop water pick-up unit and method based on multisensor.
Background technology
Plant is to the utilization of moisture, be water from soil to the plant, the motion process from the plant to the atmosphere again
[1], transpiration has played important driving action therebetween, and the plant transpiration effect overwhelming majority is undertaken by blade.
According to principle of energy balance, the power of sun net radiation and the size of crop transpiration rate are depended in the variation of leaf temperature difference.When crop obtained sufficient water supply, blade cooled off because of rising, and temperature descends and be lower than the temperature that it can reach when transpiration suppresses; And when water supply reduced, the latent heat of crop transpiration reduced, and sensible heat increases, the corresponding rising of leaf temperature.
For traditional contact type measurement, the degree that has research to think that the uneven distribution of underlaying surface temperature of blade can the effecting reaction water stress
[2]But the thermopair that the contact type measurement of plant leaf temperature uses existed come from the error that radiation and heat conduction form, and, traditional plug-in type is measured the 26S Proteasome Structure and Function that can destroy blade, and therefore, simple Ye Wen is accurate inadequately on the amount of reflection water evaporates
[3]
Continuous system at soil-plant-atmosphere
[1]In the middle of, leaf temperature difference can fully reflect the evaporation situation of blade to moisture, promptly plant is to the water utilization situation, when using the sensor of model of the same race, Ye Wen and temperature can comprise above-mentioned error, and because model is identical thereby error is identical, utilize the difference of the two can eliminate error.
In environmental factor, the data of solar radiation are absolutely necessary, its intensity even can become conclusive environmental factor
[5], and it also is the significant data of field environmental modeling
[9]
And recent studies show that, the crop transpiration rate will be far more than solar radiation for the influence of carbon assimilation rate (photosynthesis)
[6], the index of this also makes reflection transpiration rates such as saturation vapour is poor, transpiration rate becomes the important parameter of environmental modeling.
The humiture of air can influence the degree of leading of adjusting vane pore, and then influences the speed and the quantity of moisture transpiration
[10]The relative humidity of air themperature and air is to calculate the master data of saturation vapour pressure reduction.Saturation vapour pressure reduction can reflect the vapour pressure gradient of canopy top, and the judge index of the transpiration rate of plant is provided.Sun net radiation and transpiration rate have determined the temperature difference of blade and air jointly
[4]
Whether sufficient soil moisture be water supply important symbol, and according to the difference of humidity, leaf temperature difference also can be different to the linear dependence of the reflection of intensity of solar radiation, and this point has obtained confirmation on winter wheat
[8]
Water stress is an important index of plant physiology, also is one of important directions of ecological data analysis.At present, collection and research for the ecological data that influences crop growth, from the short-term collection of regional a period of time different weather, change in the growth cycle of crop to be measured the long-term collection to the different regions different weather into, it will be general all the more relying on the means of sensor network and wireless transmission
[11]
For the data acquisition of in the past multisensor, the collection of the ecological information of blade generally is with leaf Wen Weizhu, and all is the collection of small size short time
[4] [5] [7] [11]
Its weak point of prior art is: do not pay attention to leaf temperature difference for the value of eliminating sensor error, ignored " plant-atmosphere " this link in soil-plant-atmosphere system, lack getting in touch of Ye Wen and temperature; The collection of small size short time makes data only be applicable to and gathers residing environment that versatility is relatively poor; And plug-type collection meeting causes damage to crop leaf.
The list of references that above background technology is mentioned is as follows:
[1] Wu Weihua. plant physiology. Beijing: Science Press.2003：65
[2] Huang Lan etc. techniques of discriminant analysis describe that leaf temperature distributes and the plant moisture situational relationship on application. biomathematics journal 1998,13 (3): 389-393
[3]Moshe?Tarnopolsky.Leaf?temperature?error?from?heat?conduction?along?thermocouple?wires.Agricultural?and?Forest?Meteorology.1999(93)：185-194
[4] king becomes. merge and the research of the crop water method for supervising that excavates based on multi-sensor data: [doctor's thesis] Beijing: the 2009:70-72 of China Agricultural University
[5] Xiao Guanyun etc. based on the experimental study of the chamber crop water stress index of leaf temperature difference. northwest agricultural journal 2006,15 (6): 101-102
[6]James?A.Bunce.Effect?of?water?vapor?pressure?difference?on?leaf?gas?exchange?in?potato?and?sorghum?at?ambient?and?elevated?carbon?dioxide?under?field?condition.Field?Crops?Research?2003(82)：37-39
[7] Peng Shizhang etc. paddy rice leaf temperature difference Changing Pattern and water deficit diagnostic test research under the water-saving irrigation condition. water conservancy journal 2006,36 (12): 1504-1506
[8] Zhang Hongwei etc. wheat leaf temperature difference is to the reaction of intensity of illumination and to the influence of transpiration under the different soils humidity. Henan agricultural sciences 2008 (7): 25-28
[9]Axel?Garcia?y?Garcia.Impact?of?generated?solar?radiation?on?simulated?crop?growth?and?yield.Ecological?Modeling?2008(210)：312-313
[10]Leiv?M.Mortensen.Effects?of?air?humidity?on?growth，flowering，keeping?quality?and?water?relations?of?four?short-day?greenhouse?species.Scientia?Horticulturae?2000(86)：299-310
[11]Christine?Kenter.Effects?of?weather?variables?on?sugar?beet?yield?development.Europe.J.Agronomy?2006(24)：62-63
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how long-term, the accurate crop water content that also nondestructively detects.
(2) technical scheme
A kind of crop water pick-up unit based on multisensor comprises: signal gathering unit, signal conversion unit and signal analysis unit, and described signal gathering unit comprises:
Support;
Be positioned at the soil humidity sensor of frame bottom, be used to gather the moisture signal of the soil that crop plants;
Be positioned at the solar radiation sensor of a top of the trellis, be used to gather the solar radiation signal;
Be positioned at infrared temperature measurement device, first thermistor, second thermistor and the humiture integrated sensor of described solar radiation sensor below,
Described infrared temperature measurement device is used to gather the temperature and the blade ambient temperature signal of crop blade to be measured;
Described first thermistor is used to gather described leaf temperature signal to be measured;
Described second thermistor is used to gather described blade ambient air temperature signal to be measured;
Described humiture integrated sensor is used to gather the temperature and humidity signal of greenhouse air,
Described signal conversion unit is used to change the signal that described signal gathering unit is gathered, and the signal after will changing is sent to described signal analysis unit;
Described signal analysis unit is used for the signal after the treatment conversion, and according to the corresponding relation on the numerical value of the signal description leaf temperature difference after the conversion of being write down and each environmental parameter, provide the data refer of the moisture situation of plant with this, described environmental parameter is: solar irradiance, soil moisture and greenhouse air temperature and humidity.
Wherein, described second thermistor is positioned at a side of the emitting head of described infrared temperature measurement device.
Wherein, described infrared temperature measurement device, first thermistor and humiture integrated sensor are positioned at same level height.
Wherein, described first thermistor and second thermistor adopt the encapsulation of annulus intermediate plate.
Wherein, the shell of described infrared temperature measurement device adopts resist chemical and heat proof material to make.
Wherein, described signal processing unit comprises:
Signal amplification circuit be used to amplify the signal that first thermistor, second thermistor, solar radiation sensor and soil humidity sensor are gathered, and the signal after will amplifying sends to signal conditioning circuit;
Signal conditioning circuit is used to nurse one's health the signal that signal, infrared temperature measurement device and humiture integrated sensor that described signal amplifier sends are gathered.
A kind of crop water detection method based on multisensor may further comprise the steps:
S1: moisture signal, crop leaf temperature signal, described blade ambient air temperature signal, greenhouse air temperature and the moisture signal of the soil that collection solar radiation signal, crop are planted;
S2: the ambient air temperature calculated signals leaf temperature according to crop leaf temperature signal and blade is poor, and corresponding relation on the numerical value of the moisture signal of itself and described solar radiation signal, soil and air themperature and moisture signal environmental parameter is described, as the reference of the saturation state of analyzing crop.
Wherein, gather the ambient air temperature signal of two groups of crop leaf temperature signals and blade among the described step S1 at least, be respectively: the first group of crop leaf temperature signal that adopts that the infrared temperature measurement device noncontact gathers and the ambient temperature signal of blade; The crop leaf temperature signal that adopts first thermistor contact to gather, and with the ambient air temperature signal of the crop leaf ambient air temperature signal that adopts second thermistor to gather as second group of crop leaf temperature signal and blade.
Wherein, also comprise between described step S1 and the S2:
If the signal among the step S1 contains simulating signal, then this simulating signal is carried out processing and amplifying.
(3) beneficial effect
The present invention is by the different parameters signal of a plurality of different sensor crops, and leaf temperature difference is adopted contact and non-contact measurement, makes testing result more accurate, therefore can estimate crop water content exactly; With being installed on the support in a plurality of different set of sensors, can detect for a long time crop easily.
Description of drawings
Fig. 1 is the crop water pick-up unit structural representation based on multisensor of the embodiment of the invention;
Fig. 2 is a signal gathering unit structural representation among Fig. 1;
Fig. 3 is the crop water detection method process flow diagram based on multisensor of the embodiment of the invention;
Fig. 4 is the soil moisture of gathering according to method among the device among Fig. 1 and Fig. 3 and the graph of a relation of leaf temperature;
Fig. 5 adopts under the greenhouse cucumber blade drought condition of method gained among device among Fig. 1 and Fig. 3 at intraday leaf temperature difference variation diagram.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The present invention serves as theme with the movement tendency of water in " soil-plant-atmosphere " continuous system, utilization is that the data of assisting constitute based on relevant environment parameters such as leaf temperature difference, soil moisture, solar irradiance, aerial temperature and humidities, and water stress data recording intuitively is provided.
As shown in Figure 1, the crop water pick-up unit structural representation based on multisensor for the embodiment of the invention comprises: signal gathering unit 1, signal conversion unit 2 and signal analysis unit 3.Described signal gathering unit 1 has been gathered multiple sensors, is used to gather signals such as crop leaf temperature, blade ambient temperature, solar radiation, soil moisture, air themperature and humidity.Above-mentioned signal is changed through signal conversion unit 2, if simulating signal is arranged, then the signal amplification circuit by wherein 21 amplifies simulating signal, and, nurse one's health and send in the signal analysis unit 3 by wired or wireless after finishing by signal after the above-mentioned amplification of signal conditioning circuit 22 conditioning and amplifying signal not.Signal analysis unit 3 is poor according to leaf temperature and blade ambient air temperature calculating leaf temperature, corresponding relation on the numerical value of description leaf temperature difference and each environmental parameter, provide the data refer of the moisture situation of plant with this, described environmental parameter is: solar irradiance, soil moisture and greenhouse air temperature and humidity.
Wherein, the formation of signal gathering unit 1 comprises as shown in Figure 2:
Support 16 is assembled by copper Double Tops silk, cross clamp, universal clamp and iron stand etc., is provided with flexibly, and cost is low.
Be positioned at the soil humidity sensor 15 of support 16 bottoms, be used to gather the moisture signal of the soil that crop plants.During collection soil humidity sensor 15 is inserted in the soil.
Be positioned at the solar radiation sensor 13 at support 16 tops, be used to gather the solar radiation signal.Main solar radiation of gathering crop canopies, solar radiation sensor 13 utilizes the copper Double Tops silk on cross clamp and the universal clamp to be fixed on support 16 tops.
Be positioned at the infrared temperature measurement device 11 of described solar radiation sensor 13 belows, crop leaf is adopted contactless collection leaf temperature and this blade ambient temperature signal.The plastic tube of the shell of infrared temperature measurement device 11 for adopting resist chemical and heat-resisting chemical plastic to make, the emitting head of infrared temperature measurement device 11 is stuck in plastic tube one end, the plastic tube other end is opened an aperture outconnector, seals with water proof and dust proof with the glue rifle around the aperture, and silica-gel desiccant is housed in the pipe.
Be positioned at first thermistor 121 of described solar radiation sensor 13 belows, be positioned at a side of infrared temperature measurement device 11 emitting heads, and press close to emitting head, gather the blade ambient temperature, guaranteed the temperature of same target is gathered.Because the uneven distribution of the underlaying surface temperature of blade can the effecting reaction water stress degree, second thermistor 122 is attached to this blade lower surface, and the hot body radiation need not be distinguished the blade upper and lower surface, so the emitting head of infrared temperature measurement device 11 is aimed at this leaf upper surface.First thermistor 121 and second thermistor 122 adopt annular intermediate plate encapsulation.
Humiture integrated sensor 14 is positioned at solar radiation sensor 13 belows, and adjacent first thermistor 121 is gathered greenhouse air temperature and moisture signal.
Adopt universal clamp or cross clamp that said fixing infrared temperature measurement device 11, first thermistor 121, second thermistor 122 and humiture integrated sensor 14 are fixed on the support 16.And keep infrared temperature measurement device 11, first thermistor 121 and humiture integrated sensor 14 in same level height.
Because first thermistor 121, second thermistor 122, solar radiation sensor 13 and soil humidity sensor 15 are output as simulating signal, so handle again after needing to amplify, first thermistor 121, second thermistor 122, solar radiation sensor 13 be connected with signal amplification circuit 21 with soil humidity sensor 15; And infrared temperature measurement device 11 and humiture integrated sensor 14 are output as digital signal, so can directly handle, infrared temperature measurement device 11, humiture integrated sensor 14 are connected with signal conditioning circuit.
Utilize in the accompanying drawing 1 based on the crop water detection method of multisensor as shown in Figure 3, comprising:
Step S301, ambient temperature signal, air themperature and the moisture signal of the moisture signal of the soil that collection solar radiation signal, crop are planted, crop leaf temperature signal, crop leaf;
Step S302, it is poor to calculate leaf temperature according to crop leaf temperature signal and blade ambient air temperature signal, and provides the corresponding relation numerically of itself and described solar irradiance, soil moisture and greenhouse air temperature and humidity environment parameter.
This corresponding relation is: the process of plant utilization water also is the process that water moves in soil-plant-atmosphere system, therefore, environmental parameter is to select according to the trend of this motion: in the soil-plant link, soil moisture is the significant data of research root to moisture absorption, and itself just represents the content of moisture in soil.In the plant, Ye Wen can reflect moisture transpiration speed, and when crop obtained sufficient water supply, blade cooled off because of rising, and temperature descends and be lower than the temperature that it can reach when transpiration suppresses; And when water supply reduced, the latent heat of crop transpiration reduced, and sensible heat increases, the corresponding rising of leaf temperature.And in plant-atmosphere link, the humiture of air can influence the degree of leading of pore, and then influences the transpiration rate of blade.Solar radiation is the important thermal source of plant transpiration effect, and it and blade transpiration rate have determined that jointly leaf temperature is poor.
Thus, soil moisture, solar irradiance and aerial temperature and humidity acting in conjunction are in the leaf temperature, reflected water in plant with the quantitative change relation of the exchange of soil and atmosphere, promptly certain leaf temperature must be the coefficient result of each environmental parameter, but this all is based on the movement tendency of water.Detection to the leaf temperature at present is more prone to harmless noncontact mode, but simple leaf temperature detects and contains many above-mentioned errors, and under the greenhouse situation, temperature is constant relatively, the same model sensor acquisition contains identical error in same environment, so utilize same model sensor acquisition leaf temperature and ambient air temperature thereof, it is poor to utilize the two difference to obtain leaf temperature then.Leaf temperature difference can greatly be eliminated error, and keeps the data variation trend of the transpiration rate that the leaf temperature reflected.
Thus, we design, and multiple sensor apparatus gathers that the leaf temperature of synchronization is poor, soil moisture, solar irradiance and aerial temperature and humidity, and the variation of these data is mapped on amount one by one, as the ecological data reference of the saturation state of analyzing crop.
Wherein, gather the ambient temperature signal of two groups of crop leaf temperature signals and blade among the described step S301 at least.Adopt the infrared temperature measurement device noncontact to gather the ambient air temperature signal of first group of crop leaf temperature signal and blade; The crop leaf temperature signal that adopts first thermistor contact to gather, and with the ambient air temperature signal of the blade that adopts second thermistor to gather as second group of crop leaf temperature signal and blade ambient air temperature signal.First thermistor and second thermistor are the equipment of same model, when calculating the leaf temperature difference, can cut the systematic error of equipment itself, make the result of collection more accurate.
Wherein, also comprise between described step S301 and the S302:, then this simulating signal is carried out processing and amplifying if the signal among the step S301 contains simulating signal.
What take among the embodiment of Fig. 2 is the mode of individual node being carried out wired test, purpose is in order by single-node data the movement tendency of water in " soil-plant-atmosphere " continuous system described in the claim 1, its data result such as Fig. 4 and Fig. 5 to be described.
In order to show the master slave relation of data, so provide Fig. 4 and Fig. 5 respectively with for referencial use.
The soil moisture that Fig. 4 obtains after handling for upper computer software and the relation curve of leaf temperature, the top is the leaf temperature, and the below is corresponding soil moisture, and the time interval is 10 seconds; Fig. 5 is a diel leaf temperature difference data collection result, and the time interval is half an hour.Determinand is a greenhouse cucumber blade under the arid situation, as shown in Figure 5, and when water stress is serious, leaf temperature is higher than the temperature of its surrounding air, the first behavior leaf temperature from top to bottom in the triplex row temperature value on the y direction of principal axis, the second behavior blade ambient air temperature, the third line is that leaf temperature is poor.
Above embodiment only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (9)
1. the crop water pick-up unit based on multisensor is characterized in that, comprising: signal gathering unit, signal conversion unit and signal analysis unit, and described signal gathering unit comprises:
Support;
Be positioned at the soil humidity sensor of frame bottom, be used to gather the moisture signal of the soil that crop plants;
Be positioned at the solar radiation sensor of a top of the trellis, be used to gather the solar radiation signal;
Be positioned at infrared temperature measurement device, first thermistor, second thermistor and the humiture integrated sensor of described solar radiation sensor below,
Described infrared temperature measurement device is used to gather the temperature and the blade ambient temperature signal of crop blade to be measured;
Described first thermistor is used to gather described leaf temperature signal to be measured;
Described second thermistor is used to gather described blade ambient air temperature signal to be measured;
Described humiture integrated sensor is used to gather the temperature and humidity signal of greenhouse air,
Described signal conversion unit is used to change the signal that described signal gathering unit is gathered, and the signal after will changing is sent to described signal analysis unit;
Described signal analysis unit is used for the signal after the treatment conversion, and according to the corresponding relation on the numerical value of the signal description leaf temperature difference after the conversion of being write down and each environmental parameter, provide the data refer of the moisture situation of plant with this, described environmental parameter is: solar irradiance, soil moisture and greenhouse air temperature and humidity.
2. the crop water pick-up unit based on multisensor as claimed in claim 1 is characterized in that described second thermistor is positioned at a side of the emitting head of described infrared temperature measurement device.
3. the crop water pick-up unit based on multisensor as claimed in claim 1 is characterized in that described infrared temperature measurement device, first thermistor and humiture integrated sensor are positioned at same level height.
4. the crop water pick-up unit based on multisensor as claimed in claim 1 is characterized in that, described first thermistor and second thermistor adopt the encapsulation of annulus intermediate plate.
5. as each described crop water pick-up unit in the claim 1～4, it is characterized in that the shell of described infrared temperature measurement device adopts resist chemical and heat proof material to make based on multisensor.
6. the crop water pick-up unit based on multisensor as claimed in claim 1 is characterized in that described signal processing unit comprises:
Signal amplification circuit be used to amplify the signal that first thermistor, second thermistor, solar radiation sensor and soil humidity sensor are gathered, and the signal after will amplifying sends to signal conditioning circuit;
Signal conditioning circuit is used to nurse one's health the signal that signal, infrared temperature measurement device and humiture integrated sensor that described signal amplifier sends are gathered.
7. the crop water detection method based on multisensor is characterized in that, may further comprise the steps:
S1: moisture signal, crop leaf temperature signal, described blade ambient air temperature signal, greenhouse air temperature and the moisture signal of the soil that collection solar radiation signal, crop are planted;
S2: the ambient air temperature calculated signals leaf temperature according to crop leaf temperature signal and blade is poor, and corresponding relation on the numerical value of the moisture signal of itself and described solar radiation signal, soil and air themperature and moisture signal environmental parameter is described, as the reference of the saturation state of analyzing crop.
8. the crop water detection method based on multisensor as claimed in claim 7, it is characterized in that, at least gather the ambient air temperature signal of two groups of crop leaf temperature signals and blade among the described step S1, be respectively: the first group of crop leaf temperature signal that adopts that the infrared temperature measurement device noncontact gathers and the ambient temperature signal of blade; The crop leaf temperature signal that adopts first thermistor contact to gather, and with the ambient air temperature signal of the crop leaf ambient air temperature signal that adopts second thermistor to gather as second group of crop leaf temperature signal and blade.
9. the crop water detection method based on multisensor as claimed in claim 7 is characterized in that, also comprises between described step S1 and the S2:
If the signal among the step S1 contains simulating signal, then this simulating signal is carried out processing and amplifying.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778258A (en) * | 2012-07-31 | 2012-11-14 | 北京科技大学 | Device and method for measuring temperature and humidity of solid surface |
| CN103234691A (en) * | 2013-04-24 | 2013-08-07 | 北京农业智能装备技术研究中心 | Greenhouse plant leaf air saturation vapor pressure deficit measuring device and measuring method |
| CN103327807A (en) * | 2011-01-24 | 2013-09-25 | 巴斯夫植物科学有限公司 | System for monitoring growth conditions of plants |
| CN105277589A (en) * | 2015-09-14 | 2016-01-27 | 河海大学 | Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method |
| 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 |
| CN108693135A (en) * | 2017-04-11 | 2018-10-23 | 中国农业大学 | A kind of plant leaf blade moisture content detecting system |
| CN109581879A (en) * | 2019-01-31 | 2019-04-05 | 杭州安脉盛智能技术有限公司 | Loosening and gaining moisture control method and system based on generalized predictive control |
| TWI714943B (en) * | 2019-01-11 | 2021-01-01 | 蜂巢數據科技股份有限公司 | A method for analyzing adversity environments of crop and computer program product |
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| DE19722093A1 (en) * | 1997-05-27 | 1998-12-03 | Inst Agrartechnik Bornim E V | Device to measure air humidity, preferably near plants or plant parts |
| CN101598690A (en) * | 2009-07-09 | 2009-12-09 | 北京师范大学 | Method for determining soil moisture based on thermal pulse |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19722093A1 (en) * | 1997-05-27 | 1998-12-03 | Inst Agrartechnik Bornim E V | Device to measure air humidity, preferably near plants or plant parts |
| CN101598690A (en) * | 2009-07-09 | 2009-12-09 | 北京师范大学 | Method for determining soil moisture based on thermal pulse |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327807A (en) * | 2011-01-24 | 2013-09-25 | 巴斯夫植物科学有限公司 | System for monitoring growth conditions of plants |
| CN102778258A (en) * | 2012-07-31 | 2012-11-14 | 北京科技大学 | Device and method for measuring temperature and humidity of solid surface |
| CN102778258B (en) * | 2012-07-31 | 2014-10-15 | 北京科技大学 | Device and method for measuring temperature and humidity of solid surface |
| CN103234691A (en) * | 2013-04-24 | 2013-08-07 | 北京农业智能装备技术研究中心 | Greenhouse plant leaf air saturation vapor pressure deficit measuring device and measuring method |
| CN105277589A (en) * | 2015-09-14 | 2016-01-27 | 河海大学 | Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method |
| 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 |
| CN108693135A (en) * | 2017-04-11 | 2018-10-23 | 中国农业大学 | A kind of plant leaf blade moisture content detecting system |
| TWI714943B (en) * | 2019-01-11 | 2021-01-01 | 蜂巢數據科技股份有限公司 | A method for analyzing adversity environments of crop and computer program product |
| CN109581879A (en) * | 2019-01-31 | 2019-04-05 | 杭州安脉盛智能技术有限公司 | Loosening and gaining moisture control method and system based on generalized predictive control |
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| CN101949874B (en) | 2013-07-31 |
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