CN108088818A - A kind of vehicular soil moisture content and total nitrogen content spectral measurement system and method - Google Patents
A kind of vehicular soil moisture content and total nitrogen content spectral measurement system and method Download PDFInfo
- Publication number
- CN108088818A CN108088818A CN201711371226.2A CN201711371226A CN108088818A CN 108088818 A CN108088818 A CN 108088818A CN 201711371226 A CN201711371226 A CN 201711371226A CN 108088818 A CN108088818 A CN 108088818A
- Authority
- CN
- China
- Prior art keywords
- soil
- total nitrogen
- moisture content
- signal
- soil moisture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
Abstract
The invention discloses a kind of vehicular soil moisture content and total nitrogen content spectral measurement system and method, system includes tungsten lamp, optical filter, photoelectric sensor, electric signal processing circuit, A/D convertor circuit, arm processor, GPS module.The light that tungsten lamp generates is irradiated on soil；Light is converted into the optical signal with soil parameters after soil is reflected, scattered；Optical signal is received after the optical filter filtering of 8 different light transmitting wavelengths by 8 photoelectric sensors；The optical signal that each photoelectric sensor will transmit through changes into current signal；Current signal is changed into voltage signal by electric signal processing circuit.The voltage signal is converted into digital signal after A/D convertor circuit receiving voltage signal；Arm processor receives digital signal, and soil moisture content and total nitrogen content are analyzed；And the coordinate information of soil sampling point is obtained by GPS module, soil moisture content and total nitrogen content distribution schematic diagram are drawn out according to coordinate information.
Description
Technical field
The present invention relates to electrical signal detection technology, mechatronics design technology and soil spectrum detection technique, especially one
Vehicular soil moisture content and total nitrogen content spectral measurement system and method for the kind based on active light source and photoelectric sensor.
Background technology
Visible ray is located to closely red according to the molecular vibration spectrum to the analysis of the electromagnetic spectrum of element or compound, compound
In outer scope.Visible ray (Visible, VIS) and near infrared light (Near infrared, NIR) refer respectively to wavelength 380~
Electromagnetic wave in the range of 760nm and 760~2 500nm.The information of near infrared spectrum is mainly hydric group, such as:C—H、O—
H, the information that N-H, the frequency multiplication of S-H equimoleculars vibration, sum of fundamental frequencies absorb.The spectrum that different groups generate, absorb peak position and
It is different in intensity.According to Lambert-Bill law, with the variation of sample composition or structure, spectral signature
It will change, this is the theoretical foundation of near-infrared spectral analysis technology.Since near infrared spectrum contains abundant material molecule
Structural information, thus can be used to analyze most species compounds including soil and its ingredients of a mixture concentration or
Person's quality parameter.Spectral analysis technique is the modern times of the multi-subject knowledges such as integrated spectral, Chemical Measurement and computer application
Analytical technology.Compared with conventional analytical techniques, spectral analysis technique has the advantages that quick, lossless, free of contamination.
It predicts soil nutrient parameter using spectral analysis technique, judge that the space of soil nutrient becomes in conjunction with other technologies
The opposite sex is studied for precision agriculture and is of great significance with practice, is the important research topic of soil surveying technical field.
Silent winged generation that (Thermo Fisher) the hand-held x-ray spectrometer of U.S.'s match, there is more styles number.Sai Mo flies generation that
Yuan Cheng Thermo Electron Corp. is analytical instrument manufacturer maximum in the world, and it is brand under it that Buddhist nun, which leads to (Niton), is existed always
Hand-held x-ray fluorescence (XRF) technology maintains the leading position.The Niton XL3t analyzers for possessing GOLDD technologies are surveyed in mineral
Spy field has minimum detection limit, even more geologist is suitble to analyze exotic matter and the uncommon substance of earth surface.It is special
Point mainly includes：Speed is fast, easy to operate；Sealed design, dust-proof, waterproof；Communication modes are flexible；The product testing phosphorus, sulphur
It is preferable with the function of chlorine, but cannot detect to the most important moisture content of plant growth and nitrogen element content；And be not suitable for
Vehicular and automatic large scale measurement.
The content of the invention
In view of the above-mentioned problems, the present invention propose a kind of vehicular soil moisture content and total nitrogen content spectral measurement system and
Method.It is stable to develop one kind, it is easy to operate, there is higher measurement accuracy, complete control and data processor
Soil spectrum data Quick Acquisition and soil moisture content and total nitrogen content analysis system can easily should in field experiment
With.
To achieve these goals, technical scheme is as follows：
A kind of vehicular soil moisture content and total nitrogen content spectral measurement system, including tungsten lamp, optical filter, photoelectric sensing
Device, electric signal processing circuit, A/D convertor circuit, arm processor, display module, memory module, GPS module.
The light that tungsten lamp generates is irradiated on soil；Light is converted into after soil is reflected, scattered to be believed with soil parameters
The optical signal of breath；Optical signal is received after the optical filter filtering of 8 different light transmitting wavelengths by 8 photoelectric sensors respectively；Light
The optical signal of different wave length is changed into different size of current signal by electric transducer；Electric signal processing circuit turns current signal
Formation voltage signal, and voltage signal is amplified.
The voltage signal is converted into digital signal after the amplified voltage signal of A/D convertor circuit reception；Arm processor
Receive digital signal, and soil spectrum reflectivity calculated according to digital signal, so to soil moisture content and total nitrogen content into
Row analysis；And arm processor obtains the GPS coordinate information of soil sampling point by GPS module, and according to the GPS coordinate
Information draws out the soil moisture content and total nitrogen content distribution schematic diagram.
Display module is used to show the picture of the soil moisture content and total nitrogen content and its distribution schematic diagram.Memory module
For storing the soil moisture content and total nitrogen content and its distributed intelligence.
Further, tungsten lamp, optical filter, photoelectric sensor, electric signal processing circuit are encapsulated in a darkroom structure.Darkroom
The bottom of structure studs with sapphire glass piece.8 tablet filters are placed in above sapphire glass piece, and respectively close to corresponding light
Electric transducer.
Further, darkroom structure includes substrate, base enclosure, base enclosure foreboard, base enclosure backboard, sapphire glass fixed plate, the
One circuit box side plate, second circuit case side plate, circuit box upper cover plate, circuit box foreboard, circuit box backboard.
Substrate, sapphire glass fixed plate are rectangle；The length of sapphire glass fixed plate is less than the length of substrate；It is blue
Cameo glass fixed plate is mounted on the bottom of substrate；Sapphire glass piece is set in the lower section of sapphire glass fixed plate；Tungsten lamp is pacified
Mounted in thereon.Base enclosure is square table-like；Two sides of base enclosure are respectively equipped with fan mounting holes；Each fan hole respectively disposes
One fan；Fan is used to radiate to tungsten lamp；The bottom of two sides of base enclosure is horizontal-extending respectively inwards；Before base enclosure,
It is sealed respectively by base enclosure foreboard, base enclosure backboard afterwards.First circuit box side plate, second circuit case side plate are L-type；First circuit box side
Plate, second circuit case side plate are symmetrical；First circuit box side plate, second circuit case side plate are separately mounted to the both ends of base enclosure；
Circuit box upper cover plate is covered in the top of the first circuit box side plate, second circuit case side plate；First circuit box side plate and second circuit
The forward and backward of case is sealed respectively by circuit box foreboard, circuit box backboard.Circuit box upper cover plate, base enclosure are respectively equipped with a circle and lead
Line passage；Each wire channel is located at the surface of tungsten lamp respectively.
Further, darkroom structure is mounted on plough.Cavity is equipped with behind the tip of plough；Darkroom structure is placed in cavity.
Further, plough comprising ploughshare, ploughshare handle, crossbeam, horizontal pulling department, pull up portion, wheel mounting rod.
Darkroom structure is mounted on behind ploughshare handle.Ploughshare is mounted on before ploughshare handle, and ploughshare is located at the bottom of ploughshare handle；Ploughshare
Blade tip tilt down.Crossbeam is square tubular.Ploughshare handle is mounted on centered position below crossbeam, and ploughshare handle is perpendicular to crossbeam.
There are two wheel mounting rods, and respectively there are one wheel mounting rods at the both ends of crossbeam；Wheel mounting rod is parallel with ploughshare handle；Wheel is installed
The lower end of bar is equipped with wheel.Horizontal pulling department is mounted on before crossbeam.Pull up the portion among portion and horizontal pulling department
Position is connected；And it is in 45° angle to pull up between portion and horizontal pulling department.
Further, power module is further included.Power module includes accumulator, voltage transformation module, special mobile power supply.
Accumulator by be photoelectric sensor after voltage transformation module, electric signal processing circuit, GPS module provide power supply.Special mobile
Power supply is A/D convertor circuit, the power supply of arm processor, display module.
A kind of vehicular soil spectrum measuring method, includes successively：
Step S1101, generation wave band is wide, the light of intensity stabilization, and the light is made to be irradiated on smooth soil.
Step S1102 is received and filtered to the light for reflecting, scattering, and is obtained with soil moisture content and total nitrogen content information
Optical signal.The optical signal of varying strength is changed into different size of current signal by step S1103.Step S1104, by described in
Current signal changes into voltage signal, and voltage signal is amplified.Step S1105 receives amplified voltage signal, will
The voltage signal is converted into digital signal.Step S1106, according to the digital signal to the soil moisture content and total nitrogen content
It is analyzed.
It is also included before the step S1101：Step A determines the sensitivity spectrum wave band of soil moisture and full nitrogen；Step B,
The rating model of soil moisture content and total nitrogen content is established respectively.
Further, the step A is included successively：Step A1 obtains the spectral signal of several groups of soil samples；Step
A2, if carrying out dried layer wavelet filtering to each group spectral signal respectively；Step A3, respectively to the spectral signal after each group wavelet filtering
Envelope is carried out to handle；Step A4, the peak value that the spectral signal gone according to each group after envelope occurs obtain soil sample
The interval range of the sensitivity spectrum wave band of full nitrogen；Step A5, according to the interval range of the sensitivity spectrum wave band of the full nitrogen of soil sample
Set the sensitivity spectrum wave band of several total soil nitrogens.
The step S1102 has 8 to the optical filter that the light for reflecting, scattering is filtered, and light transmitting wavelength is respectively：
1450nm, 1920nm, 1375nm, 1520nm, 1861nm, 2100nm, 2286nm and 2387nm.
Further, the step S1105, and obtain the GPS coordinate information of soil sampling point.The step S1106,
And the soil moisture content and total nitrogen content distribution schematic diagram are drawn out according to GPS coordinate information.
Further, also included after the step S1106：The soil moisture content and total nitrogen content and its distribution are shown
Intention is shown as picture, and by the soil moisture content and total nitrogen content and its distribution registration according to preserving.
The beneficial effects of the present invention are：
(1) present invention can detect soil spectrum reflectivity, analysis soil moisture content and total nitrogen content exactly so that work
Farmland situation is best understood from as personnel.(2) darkroom structure reduces the interference of noise, improves measurement accuracy, and external form is small
Ingeniously, just with installation, convenience in transport.(3) measured using the method for vehicular, ploughed in tractor-drawn subsoiling plow
When, measuring system synchronously measures soil moisture content and total nitrogen content, can realize while plowing, while measuring, significantly
Reduce the workload of measurement, save human cost.(4) in order to ensure the durability of system and improve light transmittance, system is adopted
By the use of sapphire glass as soil and the separation layer of optical device, sapphire glass can play the role of smooth soil simultaneously.(5)
While gathering soil spectrum information, synchronous acquisition GPS information is that later stage soil moisture content and total nitrogen content are analyzed, and soil contains
The drafting of water rate and total nitrogen content distribution map, variable management provide safeguard.(6) operated using touch screen, it is easy to operate, easily
It uses；Data are stored with SD card, it is easy to be easy-to-use, convenient for later data processing.
Description of the drawings
Fig. 1 is the function structure chart of the present invention；
Fig. 2 is darkroom cross-sectional view of the structure in embodiment；
Fig. 3 is the design oblique view ploughed in embodiment；
Fig. 4 is the side view to be ploughed shown in Fig. 3；
Fig. 5 is the cut-away view that aluminium box is accommodated in embodiment；
Fig. 6 is the outside drawing that aluminium box is accommodated shown in Fig. 5；
Fig. 7 is two-way AD circuit diagrams in embodiment；
Fig. 8 is serial port circuit figure in embodiment；
Fig. 9 is the circuit diagram of voltage transformation module in embodiment；
Figure 10 is signal processing circuit figure in embodiment；
Figure 11 is the outside drawing of ARM in circuit part in embodiment；
Figure 12 is SD card circuit diagram in embodiment；
Figure 13 is LCD circuit diagrams in embodiment；
Figure 14 is GPS module circuit diagram in embodiment；
Figure 15 is soil moisture content linear regression model (LRM)；
Figure 16 is soil moisture content linear regression model (LRM)；
Figure 17 is vehicular soil moisture content and the total nitrogen content spectrum the present invention is based on active light source and photoelectric sensor
The schematic flow diagram of measuring method；
Figure 18 is embodiment scene operation schematic diagram；
Figure 19 is software flow figure.
Label declaration：Photosignal generation/processing system 10, control system 20, tungsten lamp 102, photoelectric sensor 103, electricity
Signal processing circuit 104, optical filter 105, A/D convertor circuit 201, arm processor 202, display module 203, memory module 204,
Plough 3, darkroom structure 30, cavity 31, ploughshare 32, ploughshare handle 33, crossbeam 34, horizontal pulling department 35, pull up portion 36, wheel installation
Bar 37, sapphire glass piece 311, substrate 301, base enclosure 302, base enclosure backboard 304, sapphire glass fixed plate 305, the first circuit
Case side plate 306, second circuit case side plate 307, circuit box upper cover plate 308, circuit box backboard 309.
Specific embodiment
Below in conjunction with the accompanying drawings, elaborate to embodiment.
To contain referring to Fig. 1, present embodiments provide for a kind of vehicular soil based on active light source and photoelectric sensor
Water rate and total nitrogen content spectral measurement system, including：Photosignal generation/processing system 10, control system 20 and for photoelectricity
Signal generation/processing system 10, control system 20 provide the power-supply system of power supply.
As shown in Figure 1, photosignal generation/processing system 10 includes tungsten lamp 102, photoelectric sensor 103, signal processing electricity
Road 104.Control system 20 includes A/D convertor circuit 201, arm processor 202, display module 203, memory module 204.
A/D convertor circuit 201 is used to be AD converted voltage signal, obtains corresponding digital signal and believes the number
Number it is sent to arm processor 202.Herein, the virtual value of digital signal voltage signal.As shown in the figure, A/D conversions are by 24
High-precision AD conversion chip ADS1256 is converted.Control system 20 further includes GPS module 205, at GPS module 205 and ARM
Reason device 202 connects.Arm processor 202 is electrically connected respectively with display module 203, memory module 204.
Tungsten lamp 102, photoelectric sensor 103, electric signal processing circuit 104 in photosignal generation/processing system 10 divide
It is not encapsulated in darkroom structure 30.Photosignal generation/processing system 10 in darkroom structure 30 passes through one group of cable and control
System 20 is connected.
The bottom of darkroom structure 30 studs with sapphire glass piece 311；Sapphire glass is close to the position of photoelectric sensor 103
Optical filter 105 is installed.The optical signal sapphire glass that tungsten lamp 102 generates is irradiated on soil；It reflects, scatter by soil
Optical signal again passes by sapphire glass, and after being filtered by optical filter, is irradiated on the photosurface of photoelectric sensor 103.Photoelectricity
Sensor 103 converts optical signals into current signal.
Tungsten lamp 102, photoelectric sensor 103, signal processing circuit 104 and optical filter 105, sapphire glass piece 311 etc.
It is all fixed in darkroom structure 30.In the present invention, using tungsten lamp 102 as active light source, running parameter 12V, 100W.Make
The interference of sunlight is completely cut off with darkroom structure 30.
Specifically, as shown in Fig. 2, schematic diagram for darkroom structure 30.The darkroom structure 30 includes substrate 301, base enclosure
302nd, 302 foreboard of base enclosure, base enclosure backboard 304, sapphire glass fixed plate 305, the first circuit box side plate 306, second circuit case
Side plate 307, circuit box upper cover plate 308, circuit box foreboard, circuit box backboard 309.
Substrate 301, sapphire glass fixed plate 305 are rectangle；The length of sapphire glass fixed plate 305 is less than substrate
301 length；Sapphire glass fixed plate 305 is mounted on the bottom of substrate 301；The sapphire glass piece 311 is set in blue treasured
The lower section of stone glass fixed plate 305；Tungsten lamp 102 is mounted on above substrate 301.Base enclosure 302 is square table-like；The two of base enclosure 302
A side is respectively equipped with fan mounting holes；Each fan hole respectively disposes a fan；Fan is used to radiate to tungsten lamp 102；Base
The bottom of two sides of shell 302 is horizontal-extending respectively inwards；The forward and backward of base enclosure 302 is carried on the back respectively by 302 foreboard of base enclosure, base enclosure
Plate 304 seals.First circuit box side plate 306, second circuit case side plate 307 are L-type；First circuit box side plate 306, second circuit
Case side plate 307 is symmetrical；First circuit box side plate 306, second circuit case side plate 307 are separately mounted to the both ends of base enclosure 302；
Circuit box upper cover plate 308 is covered in the top of the first circuit box side plate 306, second circuit case side plate 307；First circuit box side plate
306 are sealed with the forward and backward of second circuit case by circuit box foreboard, circuit box backboard 309 respectively.Circuit box upper cover plate 308, base enclosure
302 are respectively equipped with a round conductor passage；Each wire channel is located at the surface of tungsten lamp respectively.
Darkroom structure 30 is mounted on plough 3.The tip rear side of plough 3 is equipped with to place the cavity of darkroom structure 30.
Specifically, as Figure 3-Figure 4, for the present embodiment plough structure diagram, it is described plough 3 comprising ploughshare 32, ploughshare
Handle 33, crossbeam 34, pull up portion 36, wheel mounting rod 37 at horizontal pulling department 35.
Darkroom structure 30 is mounted on behind ploughshare handle 33.Ploughshare 32 is mounted on before ploughshare handle 33, and ploughshare 32 is located at ploughshare handle
33 bottom；The blade tip of ploughshare 32 tilts down.Crossbeam 34 is square tubular.Ploughshare handle 33 is mounted on position placed in the middle below crossbeam 34
It puts, and ploughshare handle 33 is perpendicular to crossbeam 34.There are two wheel mounting rods 37, and respectively there are one wheel mounting rods 37 at the both ends of crossbeam 34；
Wheel mounting rod 37 is parallel with ploughshare handle 33；The lower end of wheel mounting rod 37 is equipped with wheel.The bottom of wheel is higher than ploughshare handle 33
Bottom.Horizontal pulling department 35 is mounted on before crossbeam 34.Pull up portion 36 and the position phase among horizontal pulling department 35
Connection；And it is in 45° angle to pull up between portion 36 and horizontal pulling department 35.Upper pulling department forms the three of plough with horizontal pulling department 35
Point suspended structure.
In other embodiments, other ploughs can be used to replace the plough in the present invention.
In the specific embodiment shown in Fig. 5 and Fig. 6, a kind of receiving aluminium box, is cuboid.In other embodiment
In, it can also be cylinder, square, regular hexagon body, octagon body etc. to accommodate aluminium box.In the present embodiment, accommodate
Voltage transformation module, GPS module 205, A/D convertor circuit 201, serial port circuit have been sealed inside aluminium box.As shown in fig. 7, turn for AD
The circuit diagram of circuit 201 is changed, A/D convertor circuit 201 uses two-way AD circuits.Fig. 8 is the circuit diagram of serial port circuit.
As shown in Figures 5 and 6, the one side wall for accommodating aluminium box is equipped with switch, power supply indicator, power supply Aviation Connector, letter
Number Aviation Connector and for passing through the aperture of signal wire.Reflection, scattering light pass through photoelectric sensor 103 and signal processing successively
Voltage signal is converted into after the processing of circuit 104, voltage signal is transmitted to control system by accommodating the signal wire on aluminium box through small holes
System 20.In the present embodiment, photoelectric sensor 103 is played is converted into different size of electric current letter by the optical signal of varying strength
Number effect.
In embodiment as shown in Figure 9, voltage transformation module forms reduction voltage circuit using LM2596 chips U1.Wherein
Capacitance C5, C6 each serve as prime filter stabilization, and capacitance C8, C7 each serve as rear class filtering pressure stabilization function；Slide variable resistance
Device R51 is used to adjust the size of chip U1 output voltages, can be photosignal generation/place by adjusting slide rheostat R51
The 104 grade parts of signal processing circuit of reason system 10 provide stable 5V voltages.Control system 20 is equally using 5V voltages, by special
It is powered with mobile power.
It should be appreciated that voltage transformation module and can realize above-mentioned signal generating circuit 102, signal processing electricity
Road 103, electric signal processing circuit 104 belong to the scope that the present invention includes.
As shown in Figure 10, it is the circuit diagram of arm processor 202, employs the arm processor of Cortex A9 frameworks：
Samsung Exynos 4412.The outside drawing of arm processor 202 is as shown in figure 11.
In other some specific embodiments, memory module 204 is external SD disks, and memory module 204 includes SD card.Such as
Shown in Figure 12, SD card circuit diagram.Arm processor 202 can realize the data communication between SD card by the circuit shown in Figure 12.
The data transmission pin of chip TF1 is pulled up；3.3V voltages are powered after capacitor filtering and voltage stabilizing for chip TF1.
Specifically, display module 203 is 7 cun of high definition LCD touch screens, and touch-screen display circuit is specifically as shown in figure 13, collection
Into realizing the required various power supplys (VGH, VGL, VCOM, backlight control etc.) of AT070TN92 liquid crystal displays, and it is integrated with specialty
Touch screen controller ADS7843 (or compatible chip).Touch-screen resolution ratio is 800x480, and there is accurate resistive touch, LED to carry on the back
The features such as light, adjustable backlight, in addition, with fixed panel, appearance and size 180x130mm, supply standard 5V/2A.
Specifically, in this embodiment, GPS module 205 is using the NEO-M8N chips of u-blox companies, positioning accuracy
Can reach 0.5 meter~1.0 meters, the highest turnover rate of GPS module 205 can reach 18Hz, the data format of output include $ GPRMC,
The information such as GPGSV, GPGSA, GPGGA.As shown in figure 14, it is the circuit diagram of GPS module 205.GPS module 205 obtains sampled point
GPS coordinate information, the soil moisture content and total nitrogen content distribution paint cell block by the soil moisture content of single-point in farmland and
Total nitrogen content and GPS coordinate information combine, and draw the soil moisture content in farmland and total nitrogen content distribution schematic diagram.This distribution map can
Decision-making foundation is provided for farmland management, staff is preferably instructed to be watered, applied fertilizer, it is cost-effective, improve yield.This hair
It is bright to use the method based on active light source and sensitive band photoelectric sensor, it is further by completely cutting off sunlight and darkroom structure 30
Improve Numerical accuracy.The soil moisture content and total nitrogen content model accuracy of foundation are high, can meet detection demand.
Specifically, to be better understood when the technical program, the method for the present invention is specifically addressed.Vehicle shown in FIG. 1
Mounted soil moisture content and total nitrogen content spectral measurement system, there are aperture in signal acquisition, the one side of processing system 10, small by this
The conducting wire in hole is connected with control system 20.The conducting wire includes Serial Port Line, eight road AD signal wires, GPS antenna.Wherein, GPS days
Line is not installed in the encapsulating structure of control system, and is placed at the top of tractor, convenient for receiving more GPS satellite letters
Number.The Aviation Connector of photosignal generation/processing system 10 is used to control.
The operation principle of the present invention：
The operation principle of the vehicular soil moisture content and total nitrogen content spectral measurement system：The light that tungsten lamp 102 generates
It is irradiated on soil；The light is converted into the light with soil moisture content and total nitrogen content information after soil is reflected, scattered
Signal；The optical signal is received after the optical filter 105 of 8 different light transmitting wavelengths filters by 8 photoelectric sensors 103；Institute
It states photoelectric sensor 103 and the optical signal of varying strength is changed into different size of current signal；The electric signal processing circuit
The current signal is changed into voltage signal by 104, and voltage signal is amplified；The scope of amplified voltage signal is
It is commonly used for 0-5V.A/D convertor circuit 201 receives and the voltage signal is converted into digital signal after amplified voltage signal；ARM
Processor 202 receives the digital signal, and calculates soil spectrum reflectivity according to the digital signal, and then to the soil
Earth moisture content and total nitrogen content are analyzed.And arm processor 202 obtains the GPS of soil sampling point by GPS module 205
Coordinate information, and the soil moisture content and total nitrogen content distribution schematic diagram are drawn out according to the GPS coordinate information.Show mould
Soil moisture content and total nitrogen content and its parameter distribution schematic diagram are shown as picture by block 203.Memory module 204 stores soil and contains
Water rate and total nitrogen content and its distributed intelligence.
Before soil reflection light intensity is measured, blank is placed in the position of soil, measures the intensity of reflected light signal；
With the intensity of soil reflection light divided by the reflection light intensity of blank, you can obtain the soil spectrum reflection at each wave band
Rate.
Selection on soil parameters spectral band：Spectroscopic data can analyze the moisture content and total nitrogen content of soil.For
The sensitive band of soil is obtained, respectively 5 groups of soil samples are carried out with the spectral signal after 3 layers of wavelet filterings and carries out envelope
Processing.For the soil sample of different in moisture grade, go the curve after envelope in 1350~1419nm, 1459~
Nearby there is peak value in 1645nm, 1760~1896nm, 1970~2155nm, 2256~2346nm, 2346~2413nm scope,
1669~1757nm sections nearby have no significant change rule, and in 2155~2195nm sections, soil sample moisture content is relatively low
When, envelope curve is gone to be present with faint peak value and the not fluctuation with total nitrogen content, with the increase of moisture content, some samples
Spectral line peak value in this wave band can be covered by the spectral information in the range of 1970~2155nm.For (i.e. identical to contain with group
Water rate) different total nitrogen content soil removes envelope curve, in 1350~1419nm, 1459~1645nm, 1760~1896nm, 1970
~2155nm, 2256~2346nm, nearby there is peak value in 2346~2413nm scopes, and the height of its peak value can be with total nitrogen content
And the peak value height in fluctuation, i.e. this six wavelength bands is inversely proportional with total nitrogen content of soil.
It can be found that the analysis method that wavelet filtering is combined with removal envelope, eliminates moisture to a certain extent
Interference of the sensitive wave length (1450,1940,2210nm) for other withdrawing spectral informations, and the Absorption Characteristics of spectrum are normalized
Onto consistent spectral background, weaken since whole curve of spectrum caused by soil moisture content difference is bright in y direction generation
The influence of aobvious translation.Meanwhile on the premise of soil moisture content is identical, the peak value and total soil nitrogen of the curve of spectrum after envelope are removed
Content inversely, and this characteristic under the conditions of different water cut be applicable in.This is disturbed for real-time soil in different water cut
Lower its full nitrogen sensitive band of selection has great importance.
According to above-mentioned research, using the two sensitive ripples of 1450nm, 1920nm as soil moisture content in the present embodiment
Section；Six wave bands of 1375nm, 1520nm, 1861nm, 2100nm, 2286nm, 2387nm are selected as the real-time total soil nitrogen of reflection
The sensitive band of content.
Embedded vehicle-mounted soil measurement of water-content coefficient model：
It chooses 72 samples and carries out regression modeling as calibration set, choose 18 samples as prediction.Use moisture-sensitive
Wave band 1450 and 1920 establishes soil moisture content multiple linear prediction model, as shown in formula (1)：
Y=0.2875-0.1596x1450+0.01591x1920(1)
In formula, y is the moisture content in soil sample, xnThe original spectrum reflectivity for being soil sample at wavelength nnm.Pin
The 1 of predicted value and observed value is made to institute's established model:The reliability and uniformity of model selected by the displaying of 1 relational graph, as a result such as Figure 15
It is shown.Its coefficient of determination Rc2 is 0.8812, and verification result coefficient of determination Rv2 has also reached 0.90.
(2) embedded vehicle-mounted soil total nitrogen content rating model：
SVM prediction model is established based on selected total soil nitrogen sensitivity spectrum parameter, and introduces the think of of parameter optimization
Think.It chooses 72 samples and carries out regression modeling as calibration set；It chooses 18 samples and carries out total nitrogen content of soil as forecast set
Prediction verification.Make the 1 of predicted value and observed value for institute's established model:1 relational graph displaying selected by model reliability with it is consistent
Property, as a result as shown in figure 16.Its coefficient of determination Rc2 is 0.8132, and verification result coefficient of determination Rv2 has also reached 0.7671.
As seen from the above, the present invention can detect soil spectrum reflectivity, analysis soil moisture content and full nitrogen exactly
Content so that staff is best understood from farmland situation.And instrument external form is compact, just with installation, convenience in transport.Using tactile
Screen is operated, easy to operate, is easily used.It is measured using the method for vehicular, is carried out in tractor-drawn subsoiling plow
During arable land, measuring system synchronously measures soil parameters, greatly reduces the workload of measurement, has saved human cost.
The present invention use the method based on active light source and sensitive band photoelectric sensor, by completely cut off sunlight and darkroom structure 30 into
One step improves Numerical accuracy.The soil moisture content and total nitrogen content model accuracy of foundation are high, can meet detection demand.
As shown in figure 17, based on above-mentioned system, the invention also provides a kind of soil moisture contents and total nitrogen content spectrum
Measuring method：
In step S1101, tungsten lamp 102 generates wide wave band, light of intensity stabilization, be irradiated to plough and darkroom structure 30 is smooth
On soil afterwards.
In step S1102, the optical filters 105 of 8 different light transmitting wavelengths will reflect, the light of scattering is filtered, and filter
Go out selected soil sensitive band.
In step S1103, the light after 8 photoelectric sensors 103 filter each optical filter 105 is converted into electric current letter
Number, the relation that the size of electric current and the degree of light are positively correlated.
In step S1104, signal processing circuit 104 handles current signal, and be converted into 0-5V is convenient for what is measured
Voltage signal.
In step S1105, A/D convertor circuit 201 carries out A/D conversions to the voltage signal, obtains corresponding number letter
Number.Herein, the virtual value of digital signal feedback signal.
In step S1106, ARM processing units 202 calculate soil spectrum reflectivity according to the size of the digital signal, divide
Analysis soil moisture content and total nitrogen content simultaneously draw soil moisture content and total nitrogen content distribution map.
By the single-point soil moisture content and total nitrogen content in farmland in soil moisture content and total nitrogen content distribution map drawing process
It is combined with GPS coordinate information, draws out the distribution schematic diagram of soil moisture content and total nitrogen content.
It is also included after the step S1106：The soil moisture content and total nitrogen content and its distribution schematic diagram are shown
Into picture, and by the soil moisture content and total nitrogen content and its distribution registration according to preserving.
It is also included before step S1101：Step A determines the sensitivity spectrum wave band of total soil nitrogen；Step B, establishes soil
Nitrogen content rating model.
Specifically, step A is comprised the steps of successively：Step A1 obtains the spectral signal of several groups of soil samples；Step
A2, if carrying out dried layer wavelet filtering to each group spectral signal respectively；Step A3, respectively to the spectral signal after each group wavelet filtering
Envelope is carried out to handle；Step A4, the peak value that the spectral signal gone according to each group after envelope occurs obtain soil sample
The interval range of the sensitivity spectrum wave band of full nitrogen；Step A5, according to the interval range of the sensitivity spectrum wave band of the full nitrogen of soil sample
Set the sensitivity spectrum wave band of several total soil nitrogens.
It is preferred that soil sample has 5 groups in step A1；Carry out 3 layers of small echo filter in step A2 to each group spectral signal respectively
Ripple.
Specifically, step B is comprised the steps of successively：Step B1 chooses 72 soil samples as calibration set, is returned
Return modeling；Step B2 chooses 18 soil samples as forecast set, carries out the prediction verification of total nitrogen content of soil.Such as Figure 18 institutes
Show, for the live operation schematic diagram of the present invention.To be better understood when the present invention, below in conjunction with previously described technical solution
Illustrate the Application Example of the present invention：
The first step connects system, starts tractor, fixes GPS antenna.
Second step, after startup power supply, into system interface, system is initialized, and checks whether system is normal.Signal
In acquisition, processing system, tungsten lamp 102 generates light and is irradiated on soil, and the acquisition of photoelectric sensor 103 passes through optical filter 105
The feedback signal that photoelectric sensor 103 generates is processed into the voltage convenient for measurement by specular scattering light, signal processing circuit 104
Signal, and then analog-to-digital conversion is carried out by A/D convertor circuit 201, it calculated, analyzed by ARM processing units 202.
3rd step by operating touch screen, presses START button, and system begins to gathered data, the data collected into
Row is synchronous to be preserved, and presses " stopping " button, and system stops acquisition, preserves data.Pressing " file " button can check, add and delete
Except saved data." removing " button is pressed, program can empty all data shown on interface, curve, convenient for aobvious
Show new data.System will treated data, real-time display is on liquid crystal display and stores into ARM memories and SD card.
System operating software, with the graphical operation interface program of qt software programmings, has used C/C+ in Linux system
+ language.Program can perfection be transplanted on ARM, operated using touch screen.Program interface mainly by background interface, press by control
The information such as button, spectral data curve, working station indicator and longitude and latitude.Control button includes beginning, stopping, removing and file
Button.Program realizes measure spectrum reflectivity, GPS information, preserves information, display waveform, inquiry.Program realizes acquisition light
The functions such as spectrum information, latitude and longitude information, temporal information, preservation data, display data, display curve, and realize what is preserved
The functions such as show, check, searching for.Figure 19 is software flow figure.
This embodiment is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.
Claims (10)
1. a kind of vehicular soil moisture content and total nitrogen content spectral measurement system, it is characterised in that：
Including tungsten lamp (102), optical filter (105), photoelectric sensor (103), electric signal processing circuit (104), A/D convertor circuit
(201), arm processor (202), display module (203), memory module (204), GPS module (205)；
The light that the tungsten lamp (102) generates is irradiated on soil；The light is converted into after soil is reflected, scattered with soil
The optical signal of earth parameter information；The optical signal is after the optical filter filtering of 8 different light transmitting wavelengths by 8 photoelectric sensors
(103) receive；The optical signal of varying strength is changed into different size of current signal by the photoelectric sensor (103)；It is described
The current signal is changed into voltage signal by electric signal processing circuit (104), and voltage signal is amplified；
The voltage signal is converted into digital signal after the amplified voltage signal of A/D convertor circuit (201) reception；It is described
Arm processor (202) receives the digital signal, and calculates soil spectrum reflectivity according to the digital signal, and then right
The soil moisture content and total nitrogen content are analyzed；And the arm processor (202) obtains soil by GPS module (205)
The GPS coordinate information of earth sampled point, and the soil moisture content and total nitrogen content distribution are drawn out according to the GPS coordinate information
Schematic diagram；
The display module (203) is used to show the picture of the soil moisture content and total nitrogen content and its distribution schematic diagram；
The memory module (204) is used to store the soil moisture content and total nitrogen content and its distributed intelligence.
2. vehicular soil moisture content according to claim 1 and total nitrogen content spectral measurement system, it is characterised in that：
The tungsten lamp (102), optical filter (105), photoelectric sensor (103), electric signal processing circuit (104) are individually enclosed in one
In darkroom structure (30)；
The bottom of the darkroom structure (30) studs with sapphire glass piece (311)；
The optical filter of described 8 different light transmitting wavelengths is placed in sapphire glass piece (311) above, and each tablet filter is close
Corresponding photoelectric sensor (103)；
The light transmitting wavelength of the optical filter of 8 different light transmitting wavelengths is respectively：1450nm、1920nm、1375nm、1520nm、
1861nm, 2100nm, 2286nm and 2387nm.
3. vehicular soil moisture content according to claim 2 and total nitrogen content spectral measurement system, it is characterised in that：
The darkroom structure (30) includes substrate (301), base enclosure (302), base enclosure foreboard, base enclosure backboard (304), sapphire glass
Fixed plate (305), the first circuit box side plate (306), second circuit case side plate (307), circuit box upper cover plate (308), circuit box
Foreboard, circuit box backboard (309)；
Substrate (301), sapphire glass fixed plate (305) are rectangle；The length of sapphire glass fixed plate (305) is less than base
The length of plate (301)；Sapphire glass fixed plate (305) is mounted on the bottom of substrate (301)；The sapphire glass piece
(311) it is set in the lower section of sapphire glass fixed plate (305)；Tungsten lamp (102) is mounted on substrate (301) the upper surface of；
Base enclosure (302) is square table-like；Two sides of base enclosure (302) are respectively equipped with fan mounting holes；Each fan mounting holes
One fan of each placement (303)；Fan (303) is used to radiate to tungsten lamp (102)；The bottom of two sides of base enclosure (302)
It is horizontal-extending respectively inwards；The forward and backward of base enclosure (302) is sealed respectively by base enclosure foreboard, base enclosure backboard (304)；
First circuit box side plate (306), second circuit case side plate (307) are L-type；First circuit box side plate (306), second circuit
Case side plate (307) is symmetrical；First circuit box side plate (306), second circuit case side plate (307) are separately mounted to base enclosure
(302) both ends；Circuit box upper cover plate (308) cover the first circuit box side plate (306), second circuit case side plate (307) it is upper
Side；First circuit box side plate (306) is sealed with the forward and backward of second circuit case by circuit box foreboard, circuit box backboard (309) respectively
Firmly；
Circuit box upper cover plate (308), base enclosure (302) are respectively equipped with a round conductor passage；Each wire channel is located at respectively
The surface of tungsten lamp.
4. the vehicular soil moisture content and total nitrogen content spectral measurement system, feature according to Claims 2 or 3 exist
In：
The darkroom structure (30) is mounted on plough (3)；
Cavity (31) is equipped with behind the tip of the plough (3)；The darkroom structure (30) is placed in cavity (31).
5. vehicular soil moisture content according to claim 4 and total nitrogen content spectral measurement system, it is characterised in that：
The plough (3) includes ploughshare (32), ploughshare handle (33), crossbeam (34), horizontal pulling department (35), pulls up portion (36), vehicle
Take turns mounting rod (37)；
The darkroom structure (30) is mounted on behind ploughshare handle (33)；
The ploughshare (32) is mounted on before the bottom of ploughshare handle (33), and the blade tip of ploughshare (32) tilts down；
The crossbeam (34) is square tubular；
The ploughshare handle (33) is mounted on centered position below crossbeam (34), and ploughshare handle (33) is perpendicular to crossbeam (34)；
There are two the wheel mounting rods (37), and respectively there are one wheel mounting rods (37) at the both ends of crossbeam (34)；Wheel mounting rod
(37) it is parallel with ploughshare handle (33)；The lower end of wheel mounting rod (37) is equipped with wheel；
The horizontal pulling department (35) is mounted on before crossbeam (34)；
The portion (36) that pulls up is connected with the position among horizontal pulling department (35)；And pull up portion (36) and level
It is in 45° angle between pulling department (35).
6. a kind of vehicular soil moisture content and total nitrogen content spectral measurement method, which is characterized in that include successively：
Step S1101, generation wave band is wide, the light of intensity stabilization, and the light is made to be irradiated on smooth soil；
Step S1102 is received and filtered to the light for reflecting, scattering, and is obtained and is believed with soil moisture content and total nitrogen content
The optical signal of breath；
The optical signal of varying strength is changed into different size of current signal by step S1103；
The current signal is changed into voltage signal, and voltage signal is amplified by step S1104；
Step S1105 receives amplified voltage signal, which is converted into digital signal；
Step S1106 analyzes the soil moisture content and total nitrogen content according to the digital signal.
7. vehicular soil moisture content according to claim 6 and total nitrogen content spectral measurement method, it is characterised in that：
It is also included before the step S1101：Step A determines the sensitivity spectrum wave band of soil nitrogen；Step B establishes soil and contains
Nitrogen quantity rating model.
8. vehicular soil moisture content according to claim 7 and total nitrogen content spectral measurement method, it is characterised in that：
The step A is included successively：
Step A1 obtains the spectral signal of several groups of soil samples；
Step A2, if carrying out dried layer wavelet filtering to each group spectral signal respectively；
Step A3 carries out envelope to the spectral signal after each group wavelet filtering respectively and handles；
Step A4, the peak value that the spectral signal gone according to each group after envelope occurs obtain the sensitivity spectrum of soil sample nitrogen
The interval range of wave band；
Step A5 sets the sensitivity spectrum of several soil nitrogens according to the interval range of the sensitivity spectrum wave band of soil sample nitrogen
Wave band.
9. vehicular soil moisture content according to claim 6 and total nitrogen content spectral measurement method, it is characterised in that：
The step S1105 obtains the GPS coordinate information of soil sampling point simultaneously；
The step S1106 draws out the soil moisture content and total nitrogen content distribution schematic diagram according to GPS coordinate information simultaneously.
10. vehicular soil moisture content according to claim 8 and total nitrogen content spectral measurement method, it is characterised in that：
It is also included after the step S1106：The soil moisture content and total nitrogen content and its distribution schematic diagram are shown as picture
Face, and the soil moisture content and total nitrogen content and its distributed data are preserved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371226.2A CN108088818B (en) | 2017-12-19 | 2017-12-19 | Vehicle-mounted soil water content and total nitrogen content spectral measurement system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371226.2A CN108088818B (en) | 2017-12-19 | 2017-12-19 | Vehicle-mounted soil water content and total nitrogen content spectral measurement system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108088818A true CN108088818A (en) | 2018-05-29 |
| CN108088818B CN108088818B (en) | 2020-08-11 |
Family
ID=62177318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711371226.2A Active CN108088818B (en) | 2017-12-19 | 2017-12-19 | Vehicle-mounted soil water content and total nitrogen content spectral measurement system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108088818B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455726A (en) * | 2019-07-30 | 2019-11-15 | 北京安赛博技术有限公司 | A kind of method of real-time Forecasting Soil Moisture and total nitrogen content |
| CN110836863A (en) * | 2019-11-18 | 2020-02-25 | 四川长虹电器股份有限公司 | Spectral data analysis system |
| CN111257379A (en) * | 2020-02-26 | 2020-06-09 | 东华大学 | Tester for water content of particle solid |
| CN111257374A (en) * | 2020-02-18 | 2020-06-09 | 中国农业大学 | Soil water content and nitrogen content monitoring method, device, equipment and storage medium |
| CN113203689A (en) * | 2021-04-13 | 2021-08-03 | 中国农业大学 | Soil total nitrogen content detection method and device, electronic equipment and storage medium |
| CN115078291A (en) * | 2022-07-21 | 2022-09-20 | 常州海马科技有限公司 | Water telemetering sensor based on spectral absorption and method for telemetering water content |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149180A (en) * | 2013-01-31 | 2013-06-12 | 中国农业大学 | Detection device of soil spectral reflectivity and specific conductance and detection method thereof |
| CN103528974A (en) * | 2013-09-18 | 2014-01-22 | 浙江工业大学 | Method and device for determining content of organic matters in black soil in Northeast China based on spectral characteristic wavelength |
| CN206440604U (en) * | 2016-12-21 | 2017-08-25 | 浙江大学 | A kind of vehicle-mounted micro mouldboard plow device of field follow-on test rice soil EO-1 hyperion in situ |
| CN206497036U (en) * | 2017-01-05 | 2017-09-15 | 东北农业大学 | A kind of portable crop nitrogen nutrition monitors spectrometer |
-
2017
- 2017-12-19 CN CN201711371226.2A patent/CN108088818B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149180A (en) * | 2013-01-31 | 2013-06-12 | 中国农业大学 | Detection device of soil spectral reflectivity and specific conductance and detection method thereof |
| CN103528974A (en) * | 2013-09-18 | 2014-01-22 | 浙江工业大学 | Method and device for determining content of organic matters in black soil in Northeast China based on spectral characteristic wavelength |
| CN206440604U (en) * | 2016-12-21 | 2017-08-25 | 浙江大学 | A kind of vehicle-mounted micro mouldboard plow device of field follow-on test rice soil EO-1 hyperion in situ |
| CN206497036U (en) * | 2017-01-05 | 2017-09-15 | 东北农业大学 | A kind of portable crop nitrogen nutrition monitors spectrometer |
Non-Patent Citations (4)
| Title |
|---|
| GIYOUNG KWEON: "Soil organic matter and cation-exchange capacity sensing with on-the-go electrical conductivity and optical sensors", 《GEODERMA》 * |
| 刘玉萌等: "基于ARM9的便携式土壤氮素检测仪开发", 《2012中国农业机械学会国际学术年会论文集》 * |
| 安晓飞等: "土壤水分对近红外光谱实时检测土壤全氮的影响研究", 《光谱学与光谱分析》 * |
| 裴晓帅等: "车载式土壤光-电特性参数采集***研究", 《农业机械学报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455726A (en) * | 2019-07-30 | 2019-11-15 | 北京安赛博技术有限公司 | A kind of method of real-time Forecasting Soil Moisture and total nitrogen content |
| CN110455726B (en) * | 2019-07-30 | 2022-02-11 | 东方智感(浙江)科技股份有限公司 | Method for predicting soil moisture and total nitrogen content in real time |
| CN110836863A (en) * | 2019-11-18 | 2020-02-25 | 四川长虹电器股份有限公司 | Spectral data analysis system |
| CN111257374A (en) * | 2020-02-18 | 2020-06-09 | 中国农业大学 | Soil water content and nitrogen content monitoring method, device, equipment and storage medium |
| CN111257374B (en) * | 2020-02-18 | 2020-12-22 | 中国农业大学 | Soil water content and nitrogen content monitoring method, device, equipment and storage medium |
| CN111257379A (en) * | 2020-02-26 | 2020-06-09 | 东华大学 | Tester for water content of particle solid |
| CN113203689A (en) * | 2021-04-13 | 2021-08-03 | 中国农业大学 | Soil total nitrogen content detection method and device, electronic equipment and storage medium |
| CN115078291A (en) * | 2022-07-21 | 2022-09-20 | 常州海马科技有限公司 | Water telemetering sensor based on spectral absorption and method for telemetering water content |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108088818B (en) | 2020-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108088818A (en) | A kind of vehicular soil moisture content and total nitrogen content spectral measurement system and method | |
| CN101936882B (en) | Nondestructive testing method and device for nitrogen and water of crops | |
| Elvidge et al. | Comparison of broad-band and narrow-band red and near-infrared vegetation indices | |
| CN101975764B (en) | Near infrared spectrum technology-based multiband soil nitrogen detection device and method | |
| Shoshany et al. | Monitoring of agricultural soil degradation by remote-sensing methods: A review | |
| WO2019140920A1 (en) | Online detection system and method for droplet deposition amount of spraying operation of plant protection mechanism | |
| Lan | Development of an integration sensor and instrumentation system for measuring crop conditions | |
| CN103398957B (en) | The method of leaf area vertical distribution is extracted based on EO-1 hyperion and laser radar | |
| CN103278503B (en) | Multi-sensor technology-based grape water stress diagnosis method and system therefor | |
| Malingreau et al. | Scale considerations in vegetation monitoring using AVHRR data | |
| CN110291368A (en) | The assessment of multisensor irradiation level | |
| CN109187417A (en) | A kind of Terahertz of UAV system involves high-spectrum remote-sensing crops monitoring system | |
| Wang et al. | Development and performance test of a vehicle-mounted total nitrogen content prediction system based on the fusion of near-infrared spectroscopy and image information | |
| CN103149180B (en) | Detection method of soil spectral reflectivity and specific conductance | |
| CN102967562B (en) | High-precision monitor for crop growth information and detection method thereof | |
| Salam et al. | Signals in the soil: subsurface sensing | |
| CN106872440A (en) | Portable multi-function soil nutrient tacheometer based on SERS | |
| Wang et al. | Research on vehicle-mounted soil electrical conductivity and moisture content detection system based on current–voltage six-terminal method and spectroscopy | |
| CN105181632B (en) | NDVI measuring device is imaged in network-type various dimensions plant | |
| CN110672702A (en) | Soil component detection modeling and analysis system | |
| CN115797807A (en) | Ocean garbage monitoring method, system and medium based on data of unmanned aerial vehicle-mounted spectrometer | |
| CN213069232U (en) | Seamless positioning navigation unmanned vehicle for synchronous weather guarantee | |
| CN113194296A (en) | Unmanned aerial vehicle comprehensive remote sensing platform and method for agricultural meteorological monitoring | |
| Zhou et al. | Performance analysis of vehicle-mounted soil total nitrogen detector at different vehicle speeds | |
| CN206804532U (en) | A kind of plant Growing state survey system based on active light source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |