CN204214410U - A kind of long-term sequence field Forest Leaf Area Index surveying instrument - Google Patents
A kind of long-term sequence field Forest Leaf Area Index surveying instrument Download PDFInfo
- Publication number
- CN204214410U CN204214410U CN201420732091.3U CN201420732091U CN204214410U CN 204214410 U CN204214410 U CN 204214410U CN 201420732091 U CN201420732091 U CN 201420732091U CN 204214410 U CN204214410 U CN 204214410U
- Authority
- CN
- China
- Prior art keywords
- steering wheel
- leaf area
- waterproof case
- chip microcomputer
- long
- 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.)
- Active
Links
Abstract
A kind of long-term sequence field Forest Leaf Area Index surveying instrument, it relates to a kind of leaf area surveying instrument.The utility model effectively cannot obtain the problem of long-term sequence data in order to solve existing leaf area measurement method.Vertical rotary steering wheel of the present utility model be arranged on horizontally rotate steering wheel rotating disk on and horizontally rotate with horizontally rotating steering wheel, digital optical intensity sensor is arranged on vertical rotary steering wheel, time control part comprises time switch, the output port of single-chip microcomputer connects respectively and horizontally rotates steering wheel, vertical rotary steering wheel, SD card and display screen, the output terminal of digital optical intensity sensor connects the SDA interface of single-chip microcomputer in succession by string line, the output terminal of clock module is connected by the SCL interface of string line and single-chip microcomputer, the output terminal of power pack is connected by the single-chip microcomputer of time switch and measure portion.The measurement of the dark woods leaf area index in simple, reasonable in design, the applicable long-term sequence field of the utility model structure.
Description
Technical field
The utility model relates to a kind of leaf area surveying instrument, is specifically related to a kind of long-term sequence field Forest Leaf Area Index surveying instrument, belongs to forest ecology monitoring technical field.
Background technology
Leaf area index (leaf area index, LAI) is the long-pending half of leaf surfaces total on unit surface area, is one of important structural parameters of Forest Canopy.Obtaining Accurate leaf area index is study hotspot in the last few years.Blade is the important nutrition organs of plant, major part photosynthesis completes at blade, transpiration is also realized by the pore of blade simultaneously, plant and extraneous major organs of carrying out material, energy exchange, therefore, leaf area index weighs the solid carbon ability of plant and the important parameter of transpiration.Leaf area index has been considered to describe Forest Health, the energy circulation of research vegetation with the external world, the important indicator of material recycle.
Long-term observation Forest Leaf Area Index, after accuracy test as Forest Carbon circulation and water circulation day step procedure model input parameter, the simulation precision of Forest Carbon water circulation can be improved.Simultaneously also can as the feature of carrying out Forest Types identification with remote sensing image.
Leaf area index obtains and is divided into sample ground yardstick and regional scale.Sample ground yardstick leaf area index obtains the field survey just referring to LAI, and the yardstick LAI measurement of sample ground is divided into the direct method of measurement and the indirect method of measurement.Regional scale LAI obtains and generally refers to remote sensing appraising or inverting leaf area index, under the support of sample ground LAI measurement data, by setting up statistical model or the mechanism model of remotely-sensed data and leaf area index, calculate the leaf area index in remote sensing image region, the result obtained can be used as the important foundation data of region or global change research due.Needing the sample ground data of LAI when setting up remote sensing appraising or the inverse model of LAI, also must carry out independence test by the sample ground measurement data of LAI to model, so the measurement of LAI sample ground is the element task of remote-sensing inversion simultaneously.At present, LAI sample ground mensuration is mainly divided into and has the destructive direct method of measurement and the indirect method of measurement based on optical model, the direct method of measurement comprises the selective cutting true mensuration of normal wood, draw standard branch and standard leaf and probes touch method etc., because direct method of measurement vegetation destruction is consuming time, effort and cannot time series data be obtained, existing little studied person applied; The indirect method of measurement uses the optical instrument such as LAI-2000 series, TRAC, Sunscan to measure in sylvan life, but instantaneous when these instruments are all manual operations record is carried out to LAI, do not possess automatic Continuous Observation ability, obtain standing forest time series data and need the long-term field survey in the wild of researchist, be difficult to the leaf area index growth data obtaining Different forest stands type, and in long-term duplicate measurements, measuring position, angle reset etc. can cause larger personal error.
Utility model content
The purpose of this utility model is the problem that effectively cannot obtain long-term sequence data in order to solve existing leaf area direct measuring method and indirect measurement method.
The technical solution of the utility model is: a kind of long-term sequence field Forest Leaf Area Index surveying instrument, comprise waterproof case, measure portion is comprised in described waterproof case, power pack and time control part, described measure portion comprises single-chip microcomputer, horizontally rotate steering wheel, digital optical intensity sensor, vertical rotary steering wheel, clock module, SD card and display screen, described time control part comprises time switch, described vertical rotary steering wheel be arranged on horizontally rotate steering wheel rotating disk on and horizontally rotate with horizontally rotating steering wheel, described digital optical intensity sensor is arranged on vertical rotary steering wheel, and rotate with vertical rotary steering wheel, the output port of described single-chip microcomputer connects respectively and horizontally rotates steering wheel, vertical rotary steering wheel, SD card and display screen, the output terminal of described digital optical intensity sensor connects the SDA interface of single-chip microcomputer in succession by string line, the output terminal of clock module is connected by the SCL interface of string line and single-chip microcomputer, the output terminal of described power pack is connected by the single-chip microcomputer of time switch and measure portion.
Described power pack comprises solar panels, solar charging controller and accumulator, described solar panels are placed in the outside of waterproof case, solar charging controller and accumulator are placed in waterproof case inside, the electric energy output end of solar panels connects the input end of controller for solar by sun power socket, the output terminal of solar charging controller and the input end of accumulator connect, the output terminal of accumulator is power pack output terminal, meets instrument long-term field observation power consumption.
The output terminal of described power pack is in series with voltage reduction module and protective tube, ensures that instrument is at safe voltage operated within range, in order to avoid burn out element because voltage is excessive, delay measurement.
Be provided with digital hygro sensor in described waterproof case, the data output end of described digital hygro sensor is connected by data line and single-chip microcomputer.
Described waterproof case internal layer is waterproof layer, waterproof case upper end is provided with the high hemisphere of degree thoroughly bucker, the lower end of waterproof case is provided with digital hygro sensor bucker, the sidewall of waterproof case is provided with waterproof cooling cover and draught fan, described height is thoroughly spent hemisphere bucker and is positioned at directly over digital optical intensity sensor, digital hygro sensor bucker is placed in the lower end of digital hygro sensor, described Temperature Humidity Sensor bucker lower end is uncovered, upper end is communicated with waterproof case, described waterproof cooling cover open at one end, the other end is communicated with waterproof case, described draught fan is embedded in the sidewall of waterproof case, can the inside and outside temperature difference of lowering apparatus, reduce dew to be formed, ensure the stability of the work at forest zone environmental unit.
Described current supply circuit is provided with three switches, described three switches can be selected off-position, normal open electricity condition and be connected time switch state, selecting to pre-set the time switch time cycle during time switch is the Logic judgment Timing measurement data that instrument periodically connects power supply, deenergization coordinates Single Chip Microcomputer (SCM) program, single-chip microcomputer power consumption during so effective saving non-measured.
The utility model compared with prior art has following effect:
1, time switch can collect data according to the Logic judgment of the time coordination Single Chip Microcomputer (SCM) program pre-set, by cooperatively interacting of time switch, single-chip microcomputer and peripheral original paper, instrument can be made to realize long-term field automatic Observation, replace the duplicate measurements of artificial field, save manpower, reduce personal error.
2, multi-angle luminous intensity measurement relies on Single-chip Controlling steering wheel to rotate realization, and rotate with vertical steering wheel the light intensity data simultaneously recording current angular at horizontal steering wheel, structure is simple, cost is low, and cost angle achieves the feasibility of many standing forests cloth point observation.
3, multiple functional, can display measurement result observation data is recorded in SD card in real time, facilitate later stage building database and research and analyse use.
4, sensor is digital sensor, can realize calibration function, and the digital light intensity transducer sensitivity height response time is short and reliability is high, and during long-term observation, sampling interval rationally meets the research of forestry sensing.
In sum, the utility model structure is simple, reasonable in design, stability is strong, traditional instrument utilizes camera lens etc. to obtain data, costly, and traditional instrument is only applicable to transient measurement, surveying instrument of the present utility model is applicable to the measurement of the field leaf area index of long-term sequence, with low cost, measurement result degree of accuracy is high, can practical requirement.
Accompanying drawing explanation
Fig. 1 is internal main view of the present utility model;
Fig. 2 is the utility model outboard front view;
Fig. 3 is the utility model structured flowchart.
In figure, 1. waterproof case 2. digital hygro sensor buckers 3 high degree thoroughly hemisphere bucker 4. waterproof cooling cover 5. accumulator 6. display screen 7.SD card 8. clock module 9. single-chip microcomputer 10. waterproof layer 11. vertical rotary steering wheel 12. horizontally rotates steering wheel 13. digital hygro sensor 14. voltage reduction module 15. time switch 16. controller for solar 17. protective tube 18. and connects solar panel aviation plug 19. draught fan 20. 3 switches
Embodiment
Accompanying drawings embodiment of the present utility model, a kind of long-term sequence field Forest Leaf Area Index surveying instrument of present embodiment, comprise waterproof case 1, measure portion is comprised in described waterproof case 1, power pack and time control part, described measure portion comprises single-chip microcomputer 9, horizontally rotate steering wheel 12, digital optical intensity sensor, vertical rotary steering wheel 11, clock module 8, SD card 7 and display screen 6, described vertical rotary steering wheel 11 be arranged on horizontally rotate steering wheel 12 rotating disk on and horizontally rotate with horizontally rotating steering wheel 12, described digital optical intensity sensor is arranged on vertical rotary steering wheel 11, and rotate with vertical rotary steering wheel, described time control part comprises time switch 15, the output port of described single-chip microcomputer 9 connects respectively and horizontally rotates steering wheel 12, vertical rotary steering wheel 11, SD card 7 and display screen 6, the output terminal of described digital optical intensity sensor connects the SDA interface of single-chip microcomputer 9 in succession by string line, the output terminal of clock module 8 is connected by the SCL interface of string line and single-chip microcomputer 9, the output terminal of described power pack is connected by the single-chip microcomputer 9 of time switch 15 with measure portion.
Described power pack comprises solar panels, solar charging controller 16 and accumulator 5, described solar panels are placed in the outside of waterproof case 1, it is inner that solar charging controller 16 and accumulator 5 are placed in waterproof case 1, the electric energy output end of solar panels connects the input end of controller for solar 16 by sun power socket 18, the output terminal of solar charging controller 16 and the input end of accumulator 5 connect, and the output terminal of accumulator 5 is power pack output terminal.
The output terminal of described power pack is in series with voltage reduction module 14 and protective tube 17.
Be provided with digital hygro sensor 13 in described waterproof case 1, the data output end of described digital hygro sensor 13 is connected by data line and single-chip microcomputer.
Described waterproof case 1 internal layer is waterproof layer 10, waterproof case 1 upper end is provided with the high hemisphere of degree thoroughly bucker 3, the lower end of waterproof case 1 is provided with digital hygro sensor bucker 2, the sidewall of waterproof case 1 is provided with waterproof cooling cover 4 and draught fan 19, described height is thoroughly spent hemisphere bucker 3 and is positioned at directly over digital optical intensity sensor, digital hygro sensor bucker 2 is placed in the lower end of digital hygro sensor 13, described Temperature Humidity Sensor bucker 2 lower end is uncovered, upper end is communicated with waterproof case 1, described waterproof cooling cover 4 open at one end, the other end is communicated with waterproof case, described draught fan 19 is embedded in the sidewall of waterproof case 1.
Described current supply circuit is provided with three switches 20.
Described single-chip microcomputer is Arduino UNO single-chip microcomputer.
Two director's time series field Forest Leaf Area Index measuring instruments are utilized to coordinate, light intensity after recording light therethrough canopy under a placement standing forest canopy to be measured is called B value, another field record placed near standing forest to be measured is not called A value through the light intensity of canopy, calculate leaf area index by baer's law and miller law, described baer's law is: I=I
0exp (-x), wherein I
0for projectile energy, I is the energy obtained of decaying after the uniform dielectric by x distance, when the homogeneous media extinction coefficient passed be a, concentration of medium be C time, obtain:
i in formula
0/ I is transmitance, and P (q) represents the extinction coefficient relevant to light angle, and even extinction coefficient is that a G (q) represents then there is P (q)=e
-G (q) L/cosq, wherein L is the number of plies of effective leaf;
Have according to miller law:
described G (q)=k (q)/L, draws formula according to baer's law and miller law:
and then extrapolate the numerical value of leaf area index LAI.
Before measuring, long-term sequence field Forest Leaf Area Index surveying instrument is corrected, utilize sensor calibration module to solve each ring light intensity of two instruments record-shifted and increment, that is: L
ai=o
i+ g
i* L
bi, wherein L
aifor the light intensity value of A instrument i-th ring record, L
bifor the light intensity value of B instrument i-th ring record, g
ithe i-th ring skew, o
ibe the i-th ring increment, program utilizes principle of least square method to solve, and utilizes formula:
wherein
for o
i, g
iestimated value, e
ifor residual error, select
make residual sum of squares (RSS) (the ∑ e of all data points
i) reach minimum, as g
iand o
iestimated value, revise the systematic error of two instruments.
After measurement, time adjustment is carried out to data, start Measuring Time by recording two instruments and terminate Measuring Time and utilize stretching formula
two appliance time are unified, wherein T
asfor A instrument starts Measuring Time, T
aefor the A apparatus measures end time, T
bsfor B instrument starts Measuring Time, T
befor B instrument terminates Measuring Time, T
bxfor writing time during B apparatus measures, T'
bxfor T
bxtime after adjustment.
Data after overcorrect, can utilize the monofile computing module in program and batch computing module to resolve the leaf area index measuring sample ground.Wherein monofile leaf area index computing module can be expressed on program interface in the matrix form by obtaining each angular light line strength attenuation rate after each angle measurement and calculating, can see that sylvan life each angular light overdamp rate distributes intuitively, conveniently standing forest multi-angle light transmission be studied further; Batch computing module by the Auto-matching time interval the shortest A, B value file, can resolve the leaf area index data in fixed time section, and the function of a large amount of long-term field observation data is resolved in realization.
Claims (6)
1. a long-term sequence field Forest Leaf Area Index measuring instrument, comprise waterproof case (1), it is characterized in that: described waterproof case comprises measure portion in (1), power pack and time control part, described measure portion comprises single-chip microcomputer (9), horizontally rotate steering wheel (12), digital optical intensity sensor, vertical rotary steering wheel (11), clock module (8), SD card (7) and display screen (6), time control part comprises time switch (15), described vertical rotary steering wheel (11) be arranged on horizontally rotate steering wheel (12) rotating disk on and horizontally rotate with horizontally rotating steering wheel (12), described digital optical intensity sensor is arranged on the rotating disk of vertical rotary steering wheel (11), and rotate with vertical rotary steering wheel (11), the output port of described single-chip microcomputer (9) connects respectively and horizontally rotates steering wheel (12), vertical rotary steering wheel (11), SD card (7) and display screen (6), the output terminal of described digital optical intensity sensor connects the SDA interface of single-chip microcomputer (9) in succession by string line, the output terminal of clock module (8) is connected by the SCL interface of string line and single-chip microcomputer (9), the output terminal of described power pack is connected by the single-chip microcomputer (9) of time switch (15) with measure portion.
2. a kind of long-term sequence field Forest Leaf Area Index measuring instrument according to claim 1, it is characterized in that: described power pack comprises solar panels, solar charging controller (16) and accumulator (5), described solar panels are placed in the outside of waterproof case (1), it is inner that solar charging controller (16) and accumulator (5) are placed in waterproof case (1), the electric energy output end of solar panels connects the input end of controller for solar (16) by sun power socket (18), the output terminal of solar charging controller (16) and the input end of accumulator (5) connect, the output terminal of accumulator (5) is power pack output terminal.
3. a kind of long-term sequence field Forest Leaf Area Index measuring instrument according to claim 2, is characterized in that: the output terminal of described power pack is in series with voltage reduction module (14) and protective tube (17).
4. a kind of long-term sequence field Forest Leaf Area Index measuring instrument according to claim 3, it is characterized in that: be provided with digital hygro sensor (13) in described waterproof case (1), the data output end of described digital hygro sensor (13) is connected by data line and single-chip microcomputer.
5. a kind of long-term sequence field Forest Leaf Area Index measuring instrument according to claim 4, it is characterized in that: described waterproof case (1) internal layer is waterproof layer (10), waterproof case (1) upper end is provided with high degree hemisphere bucker (3) thoroughly, the lower end of waterproof case (1) is provided with digital hygro sensor bucker (2), the sidewall of waterproof case (1) is provided with waterproof cooling cover (4) and draught fan (19), described height is thoroughly spent hemisphere bucker (3) and is positioned at directly over digital optical intensity sensor, digital hygro sensor bucker (2) is placed in the lower end of digital hygro sensor (13), described Temperature Humidity Sensor bucker (2) lower end is uncovered, upper end is communicated with waterproof case (1), described waterproof cooling cover (4) open at one end, the other end is communicated with waterproof case, described draught fan (19) is embedded in the sidewall of waterproof case (1).
6. a kind of long-term sequence field Forest Leaf Area Index measuring instrument according to claim 5, is characterized in that: described current supply circuit is provided with three switches (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732091.3U CN204214410U (en) | 2014-11-27 | 2014-11-27 | A kind of long-term sequence field Forest Leaf Area Index surveying instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732091.3U CN204214410U (en) | 2014-11-27 | 2014-11-27 | A kind of long-term sequence field Forest Leaf Area Index surveying instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204214410U true CN204214410U (en) | 2015-03-18 |
Family
ID=52983075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420732091.3U Active CN204214410U (en) | 2014-11-27 | 2014-11-27 | A kind of long-term sequence field Forest Leaf Area Index surveying instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204214410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359428B (en) * | 2014-11-27 | 2017-01-18 | 东北林业大学 | Instrument and method for measuring long-time-series field forest leaf area index (LAI) |
-
2014
- 2014-11-27 CN CN201420732091.3U patent/CN204214410U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359428B (en) * | 2014-11-27 | 2017-01-18 | 东北林业大学 | Instrument and method for measuring long-time-series field forest leaf area index (LAI) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103697937B (en) | Environment and plant strain growth situation synergic monitoring analytical equipment and method | |
| CN100480681C (en) | Plant growth information acquisition device based on near infrared spectrum | |
| CN101965807B (en) | System for individually recording production performance of layers and automatically monitoring environment of layer house | |
| CN203337520U (en) | Novel xenon lamp aging test machine | |
| CN203825214U (en) | Meteorological detection system | |
| CN103454304A (en) | Concrete specimen temperature testing device for simulating natural environments and testing method of concrete specimen temperature testing device | |
| CN104359428B (en) | Instrument and method for measuring long-time-series field forest leaf area index (LAI) | |
| CN203858176U (en) | Solar energy-based small soil water evaporation measuring device | |
| CN102879123A (en) | Temperature real-time detector for flue-cured tobaccos | |
| CN204214410U (en) | A kind of long-term sequence field Forest Leaf Area Index surveying instrument | |
| CN204462134U (en) | Portable multi-function soil parameters sensing device | |
| CN207692643U (en) | A kind of microphyte incubator | |
| CN204228602U (en) | Crop leaf physiological moisture monitoring system | |
| CN203396731U (en) | Cement concrete test piece temperature testing device for simulating natural environment | |
| CN101858759A (en) | Multi-channel agricultural measuring device based on MCU | |
| CN201622119U (en) | Synchronous double-channel blade infrared temperature and photosynthesis determination blade chamber | |
| Yitong et al. | Design of multi-parameter wireless sensor network monitoring system in precision agriculture | |
| Liu et al. | Design of hierarchical monitoring system for crop growth environment based on arduino yún development platform | |
| CN207163904U (en) | A kind of different levels soil nutrients variability device based on spectral reflectivity | |
| CN206945060U (en) | A kind of forestry microenvironment monitoring system | |
| CN201680860U (en) | Multi-channel agricultural measuring device based on MCU | |
| CN205404846U (en) | Field microclimate automatic observer | |
| CN206248851U (en) | The digital weather station in campus | |
| CN204882571U (en) | Blood glucose meter based on zigbee | |
| CN205748686U (en) | A kind of plant leaf temperature surveying record instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |