CN102192885A - Large-scale moisture-and-heat flux observation system - Google Patents
Large-scale moisture-and-heat flux observation system Download PDFInfo
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- CN102192885A CN102192885A CN 201010118957 CN201010118957A CN102192885A CN 102192885 A CN102192885 A CN 102192885A CN 201010118957 CN201010118957 CN 201010118957 CN 201010118957 A CN201010118957 A CN 201010118957A CN 102192885 A CN102192885 A CN 102192885A
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Abstract
The invention discloses a large-scale moisture-and-heat flux observation system. The system comprises an emitter and a receiver, wherein the emitter comprises a high-power emitting light source module for providing an optical signal with a corresponding wavelength, a power amplification module for amplifying the power of the optical signal, an emitting optical signal modulation module for modulating the frequency of the optical signal of which the power is amplified so as to form an emitting optical signal, and an emitting optical signal output module for outputting the emitting optical signal; and the receiver comprises an emitting optical signal receiving module for receiving the emitting optical signal, an emitting optical signal demodulation module for amplifying and denoising the emitting optical signal to acquire air refraction index structure parameters which are related to moisture and heat fluxes, and an energy consumption lowering module for controlling the emitting optical signal demodulation module to enter a low power consumption working mode. By using the large-scale moisture-and-heat flux observation system, the emitting power of an emitting device in the observation system can be improved, and the electric energy consumption of a receiving device can be lowered at the same time.
Description
Technical field
The present invention relates to the apparatus measures technical field, more particularly, relate to a kind of large scale water and heat recording geometry.
Background technology
The major technique of traditional measurement surface water thermoflux comprises at present: eddy correlation technology, ripple ratio-energy balance method, aerodynamics method and lysimeter method.The aerodynamics method is utilized two or more wind speed of highly measuring, temperature and humidity, calculates water and heat in conjunction with similarity theory.This method is higher to the accuracy requirement of sensor, and computation process is complicated, and application conditions also has certain restriction (as being applicable to smooth, even underlying surface etc.).Ripple ratio-energy balance method calculates the ripple ratio coefficient based on air heat and the equal hypothesis of steam turbulent diffusivity by measuring two height temperature and vapour pressure, extrapolates the surface water thermoflux according to face of land energy-balance equation.This method physical concept is clear and definite, calculates simply, and generally precision is higher on open, even underlying surface, and is having under the horizontal advection situation, and measuring error is bigger.The eddy correlation technology supposes based on Taylor, and by measuring wind, temperature, wet pulsating quantity, the covariance of calculating percent ripple obtains the surface water thermoflux, is the method for more accurately measuring the surface water thermoflux of generally acknowledging in the world at present.But there is not closed-ended question of energy in observed result, and the application under complex-terrain and unfavorable meteorological condition simultaneously is subjected to certain limitation.Lysimeter is a kind ofly soil to be housed and to place the field underground with simulation field crop growing environment, and surface exposure or cover plant are used for determining the evapotranspiration of the crop that growing or the tun of exposed soil evaporation capacity.Soil moisture in the lysimeter is regulated and control to simulate the actual process of evapotranspiring effectively, by weighing, just can obtain evapotranspiration again lysimeter.Though the lysimeter method has simple and clear characteristics, but it is limited that the spatial and temporal variation that distributed by field underlying surface characteristic and soil moisture influences the regional extent that makes measured value to represent, and be vulnerable to the people and step on the distortion that cause causes the interim observation data of plant growth such as to step on owing to the part lysimeter lacks corresponding drainage equipment or its peripheral soil.
Above-mentioned technical method measurement result is local yardstick, and the measurement result of single-point or patch can only be provided, and on behalf of scope, the space of Instrument observation value have only tens meters usually to the hundreds of rice, can't satisfy the application demand of large scale water and heat observation data.
A kind of new flux measurement instrument of rising in recent years--large aperture scintiloscope (LAS) then can be measured 500-5000 rice (optical path length of ultra-large aperture scintiloscope can reach 10-30km) zone leveling water and heat.LAS is divided into emitter and receiving trap usually, and (500-5000m) separated by a distance is placed apart for emitter and receiving trap, apart from the height on several meters to tens meters on ground.Emitter is launched the wave beam (being generally 880nm) of certain wavelength, in atmosphere, propagate, receiving trap receives the light signal that is subjected to temperature on the light path path, humidity and air pressure influence of fluctuations, and the light signal that receives is carried out demodulation, with air refraction construction of indexes parameter (C
n 2) represent the turbulence intensity of atmosphere; In conjunction with weather data, can obtain sensible heat flux according to similarity theory; According to face of land energy-balance equation, utilize the net radiation and the soil heat flux data of observation simultaneously, can calculate latent heat flux.
Current, the main manufacturer of LAS is Dutch Kipp﹠amp; Zonen company and German Scintec company.The LAS that Holland and Germany produce includes emitter and receiving trap, all need be equipped with accumulator, transformer, solar panels equipment such as (or alternating currents) during field inspection, all needs in conjunction with weather data, and calculates the surface water thermoflux according to similarity theory.The transmitter of different the is LAS that Holland produces is launched single continuity point light source, and power is less, and during with unfavorable meteorological condition (high humidity etc.), signal intensity is on the weak side in long distance.In addition, the receiving trap power consumption among the LAS that Germany produces is bigger, is difficult for carrying out the work during the no alternating current of observation in the open air, needs to adopt solar panels to power.Continuous when overcast and rainy when occurring, cause the data disappearance because of the electric weight deficiency easily.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of large scale water and heat recording geometry, so that improve the emissive power of emitter in the recording geometry, reduces the power consumption of receiving trap simultaneously.
The embodiment of the invention provides a kind of large scale water and heat recording geometry, and described system comprises: transmitter and receiver; Wherein, described transmitter comprises: the high power transmission light source module is used to provide the light signal of respective wavelength; Power amplifier module is used for that described light signal is carried out power amplification and handles; Emission light signal modulation module is used for the light signal of handling through power amplification is carried out frequency modulation (PFM), forms the emission light signal; Emission light signal output module is used to export described emission light signal;
Described receiver comprises: the emission optical signal receiving module is used to receive the emission light signal that described transmitter is exported; Emission light signal demodulation module, be used for to described emission light signal amplify, noise reduction process, obtain and the relevant air refraction construction of indexes parameter of water and heat measurement; Energy consumption reduces module, is used for controlling described emission light signal demodulation module and enters low power mode of operation in the process that the observation data signal that described transmitter is provided carries out demodulation process.
Preferably, described power amplifier module also comprises: PCU Power Conditioning Unit, the output power that is used to regulate described power amplifier module.
Preferably, described high power transmission light source module comprises: large-power light-emitting diodes.
Preferably, described transmitter also comprises: the stabilized voltage supply control module is used for that voltage stabilizing is carried out in the power supply of described transmitter and handles.
Preferably, described emission light signal demodulation module comprises:
Light signal amplifies submodule, is used for by logarithm operational amplifier described emission light signal being carried out elementary amplification, obtains the logarithm of described emission light signal light intensity;
The automatic gain controlling sub is used to remove the influence to described emission light signal of optical path route and optical aperture;
Filtering syndrome module is used for the carrier signal of described automatic gain controlling sub output is carried out further noise reduction process;
The operator module is used to utilize the yield value of the carrier signal of the logarithm of described emission light signal light intensity and the output of described filtering syndrome module to carry out computing, obtains the variance yields of the product of the logarithm of described emission light signal light intensity and described yield value;
Then described light signal amplifies submodule, also is used for by logarithm operational amplifier described variance yields being amplified the output signal value of the proportional relation of air refraction construction of indexes parameter of acquisition and described water and heat.
Preferably, described emission optical signal receiving module comprises: the high sensitivity photodiode.
Preferably, described system also comprises: data acquisition module, and be used to gather the air refraction construction of indexes parameter of the sign turbulence intensity that described receiver obtains, and gather the meteorological condition parameter, carry out the calculating of water and heat.
Preferably, described system also comprises: the meteorological element measurement module is used to provide with water and heat and calculates relevant meteorological condition parameter.
Preferably, described system also comprises: transport module, the related data transmission that is used for measuring is to user side.
Compare with prior art, technical scheme provided by the invention is by being provided with power amplifier module in transmitter, can improve the power of the emission light signal of transmitter output greatly, make water and heat recording geometry provided by the invention when growing distance, the requirement of strength that still can guarantee to launch light signal with unfavorable meteorological condition; In addition, the present invention is provided with energy consumption and reduces module in receiver, carry out in the process of demodulation process at the observation data signal that transmitter is provided with controlling receiver, work in the mode of operation of low-power consumption, thereby reduce the power consumption in the receiver operation process, assurance water and heat recording geometry can be kept long power supply when utilizing the load powered battery, be difficult for producing because of the not enough defective that causes the observation data disappearance of electric weight.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below.Apparently, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of large scale water and heat recording geometry structural representation that Fig. 1 provides for the embodiment of the invention;
The receiver that Fig. 2 provides for the embodiment of the invention is for the demodulation process synoptic diagram of emission light signal;
The another kind of large scale water and heat recording geometry structural representation that Fig. 3 provides for the embodiment of the invention;
Another large scale water and heat recording geometry structural representation that Fig. 4 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
At first large scale water and heat recording geometry provided by the invention is described, with reference to shown in Figure 1, described large scale water and heat recording geometry can comprise: transmitter 10 and receiver 20; Wherein, described transmitter 10 comprises: high power transmission light source module 101 is used to provide the light signal of respective wavelength; Power amplifier module 102 is used for that described light signal is carried out power amplification and handles; Emission light signal modulation module 103 is used for the light signal of handling through power amplification is carried out frequency modulation (PFM), forms the emission light signal; Emission light signal output module 104 is used to export described emission light signal;
Described receiver 20 comprises: emission optical signal receiving module 201 is used to receive the emission light signal that described transmitter is exported; Emission light signal demodulation module 202, be used for to described emission light signal amplify, noise reduction process, obtain and the relevant air refraction construction of indexes parameter of water and heat measurement; Energy consumption reduces module 203, is used for controlling described emission light signal demodulation module and enters low power mode of operation in the process that the observation data signal that described transmitter is provided carries out demodulation process.
In the large scale water and heat recording geometry provided by the invention, mainly comprise transmitter and receiver, by power amplifier module is set in transmitter, power with the emission light signal that improves transmitter output greatly, make the water and heat recording geometry when growing distance, the requirement of strength that still can guarantee to launch light signal with unfavorable meteorological condition; In addition, the present invention is provided with energy consumption and reduces module in receiver, carry out in the process of demodulation process at the observation data signal that transmitter is provided with controlling receiver, work in the mode of operation of low-power consumption, thereby reduce the power consumption in the receiver operation process, assurance water and heat recording geometry can be kept long power supply when utilizing the load powered battery, be difficult for producing because of the not enough defective that causes the observation data disappearance of electric weight.
During practical application, (500-5000m) separated by a distance is placed apart for transmitter and receiver, apart from the height on several meters to tens meters on ground, realizes the application demand of large scale water and heat observation.Transmitter is launched the wave beam of certain wavelength, this light beam is propagated in atmosphere, and be subjected to the influence of meteorological conditions such as temperature, humidity and air pressure fluctuation on the light path path, receiver receives the light signal that is subjected to temperature on the light path path, humidity and air pressure influence of fluctuations, and the light signal that receives carried out demodulation, obtain air refraction construction of indexes parameter (C
n 2), and utilize air refraction construction of indexes parameter to represent the turbulence intensity of atmosphere, this air refraction construction of indexes parameter is relevant with water and heat; In conjunction with weather data, can obtain sensible heat flux by air refraction construction of indexes parameter according to similarity theory; According to face of land energy-balance equation, utilize the net radiation and the soil heat flux data of observation simultaneously, can calculate latent heat flux.
For the ease of the present invention is further understood, describe the present invention below in conjunction with the specific embodiment of the present invention.
For emission optical signal transmitting power is provided, the embodiment of the invention is provided with power amplifier module in transmitter, with the power of the emission light signal that improves transmitter output greatly.During concrete enforcement, can utilize square-wave signal generation circuit (mainly comprising: timer, trigger and operational amplifier) to generate the input signal of the square wave of characteristic frequency, particular duty cycle as the power amplifier module circuit.
In addition, in the embodiment of another power amplifier module provided by the invention, described power amplifier module can also comprise: PCU Power Conditioning Unit, pass through PCU Power Conditioning Unit, the emission light signal that makes transmitter provide can satisfy the power requirement of different measuring distance, and that observes when guaranteeing long distance or bad weather condition normally carries out.The enlargement factor of power amplifier can be adjusted by outside adjustable potential meter according to actual needs, and for example: dutycycle is 0.5 o'clock, regulates maximum output current and can reach 1A.
Usually,, can select high-power, high performance light emitting diode, the 880nm that the wavelength of emission light signal can be defined as using always as transmitting illuminant for the power that guarantees to launch light signal is enough big.
In order further to reduce the influence of supply voltage to the emission light signal, the stabilized voltage supply control module can also be set in transmitter, by this stabilized voltage supply control module voltage stabilizing is carried out in the power supply of transmitter and handled.
Provide the process of emission light signal to carry out simple declaration to the transmitter among the present invention below.When connecting the power supply of transmitter, by the stabilized voltage supply control module voltage stabilizing is carried out in the power supply of transmitter and handled; The light signal that the transmitting illuminant that high-power, high performance light emitting diode is made produces carries out the hunting of frequency modulation through modules such as crystal oscillator signal projector, frequency dividers, produce the light signal of characteristic frequency, and adopt modulation-demodulation technique to improve the signal to noise ratio (S/N ratio) of light signal; The light signal of this characteristic frequency carries out signal through adjustable power amplifier and amplifies, and carries out after crystal oscillator waveform and pulse waveform detect through detection module, and last scioptics form required transmitting.Be specially the selection suitable wavelengths, correspondingly select tunable near-infrared light source, select suitable power supply control and temperature control modules by debugging the back, and select suitable luminous power, lens type and aperture according to path, signal power and the cost budgeting of transmission.According to the interfering frequency scope of background radiation, select suitable modulating frequency, to eliminate the influence of background radiation to greatest extent to the emission light signal.
Be the relevant technical parameter of transmitter in the embodiment of the invention below:
Operating voltage: 12VDC; Lens: Fresnel lens, aperture: 0.15m; Light source: GaAlAs LED;
Transmitting illuminant wavelength: 880nm; Luminous power: 100mw; Little emission angle; Carrier frequency: 6.5KHz, dutycycle=0.5, source current: maximum can reach 3A;
GaAlAs LED pulsed frequency, adjustable current scope: 6.5KHz, dutycycle=0.5; Current Regulation button and current relationship: maximum surge current 1A, average current 500mA; Average forward continuous current IF=500mA, under dutycycle 0.5 condition, luminous power 100mW;
Optical path length and electric current correlationship: receiving modulation back carrier signal be sine wave, as sawtooth wave occurs or receiver is saturated, then need reduce electric current.
As seen, transmitter among the large scale water and heat recording geometry embodiment of the present invention is by being provided with power amplifier module in transmitter, power with the emission light signal that improves transmitter output greatly, make water and heat recording geometry provided by the invention when growing distance, the requirement of strength that still can guarantee to launch light signal with unfavorable meteorological condition.
Behind transmitter output emission light signal, should guarantee that receiver can respond the light signal that is subjected to temperature on the light path path, humidity and air pressure influence of fluctuations.In order to improve the defective of the high energy consumption of receiving trap among the present LAS, be provided with energy consumption in the receiver in the embodiment of the invention and reduce module, enter low power mode of operation to control described emission light signal demodulation module, reduce the power consumption in the receiver operation process.
In the specific implementation, when the emission optical signal receiving module in the receiver receives the emission light signal, just by emission light signal demodulation module the emission light signal is carried out demodulation process, comprise: light amplification, noise reduction process, to obtain measuring relevant air refraction construction of indexes parameter with water and heat.Described emission light signal demodulation module comprises:
Light signal amplifies submodule, is used for by logarithm operational amplifier described emission light signal being carried out elementary amplification, obtains the logarithm of described emission light signal light intensity;
The automatic gain controlling sub is used to remove the influence of optical path route and the optical aperture emission light signal after to elementary amplification;
Filtering syndrome module is used for the carrier signal of described automatic gain controlling sub output is carried out Filtering Processing, realizes further noise reduction process;
The operator module is used to utilize the yield value of the carrier signal of the logarithm of described emission light signal light intensity and the output of described filtering syndrome module to carry out computing, obtains the variance yields of the product of the logarithm of described emission light signal light intensity and described yield value;
Then described light signal amplifies submodule, also is used for by logarithm operational amplifier described variance yields being amplified, and obtains and air refraction construction of indexes parameter (C
n 2) output signal value of proportional relation.
In the embodiment of the invention, suppose that the emission light signal light intensity that the emission optical signal receiving module receives is I, as shown in Figure 2, receiver mainly comprises for the demodulation process of emission light signal:
At first the logarithm operational amplifier that amplifies in the submodule by light signal carries out elementary amplification to the emission light signal, obtains the logarithm (lnI) of light intensity; Afterwards, remove optical path route (L by automatic gain control (AGC, automatic gaincontrol) submodule
1) and the influence of the emission light signal of optical aperture (D) after to elementary amplification; By filtering syndrome module the carrier signal of described automatic gain controlling sub output is carried out further noise reduction process again; Further by root mean square (RMS, Root mean square) pattern obtains output signal (logarithm of light intensity and gain setting are on duty long-pending) variance, that is: the operator module utilizes the yield value of the carrier signal of the logarithm of described emission light signal light intensity and the output of described filtering syndrome module to carry out computing, obtains the variance yields of the product of the logarithm of described emission light signal light intensity and described yield value; At last, described variance yields input optical signal amplifies submodule, amplifies submodule by light signal and by logarithm operational amplifier described variance yields is amplified, and obtains the air refraction construction of indexes parameter (C with described water and heat
n 2) output signal value (V) of proportional relation, this output signal can be expressed as:
V＝log(10
12*1.12D
7/3L
1 -3σ
2(ln(I))) (1)
(1978, Journal of optical society of America is 3:334-338) about C and according to Wang et al.
n 2Definition:
C
n 2＝1.12D
7/3L
1 -3σ
2(ln(I)) (2)
Get final product: C
n 2=10
(V-12)(3)
Need to prove that the emission optical signal receiving module in the embodiment of the invention can be a photodiode, the wavelength of photodiode can be defined as normally used 880nm.In addition, can realize the enhancing of incident optical signal by large aperture and high performance lens design.Corresponding filtering circuit can be for high pass, low pass, bandwidth-limited circuit, and to this, the present invention does not do any qualification.
Be the relevant technical parameter of receiver in the embodiment of the invention below:
Operating voltage: 12VDC; Lens: Fresnel lens, aperture: 0.15m;
Detector response wavelength coverage: 700～950nm, the wide 60nm of half-wave, sensitivity 880nm, 0.6A/W; Response time: 1 microsecond has the background anti-interference function;
Flash signal wave band: 0.2～400HZ
Restituted signal output area :-800mv～0mv
Cn2 output area :-5v～0v, tool carrier signal, restituted signal detection port.
Since in water and heat computation process, need be in conjunction with real-time weather data.Usually, need additional configuration weather monitoring device, obtain weather data in real time.For easy to detect, in another water and heat recording geometry in embodiments of the present invention, as shown in Figure 3, this system also is provided with data acquisition module 40, be used to gather the air refraction construction of indexes parameter of the sign turbulence intensity that described receiver obtains, and gather real-time meteorological condition parameter, carry out the measurement of water and heat.
In addition, in order to carry out the monitoring of water and heat in real time, in another large scale water and heat recording geometry, as shown in Figure 4, this system also is provided with meteorological element measurement module 30, be used to provide with water and heat and calculate relevant meteorological condition parameter, that is: be integrated with the weather monitoring device in the water and heat recording geometry, make the water and heat recording geometry be integrated with the dual-use function of weather monitoring and the detection of surface water thermoflux parameter.The meteorological element measurement module can be realized by suitable meteorological element sensor.
According to formula (1)-(3), data acquisition module has solved C
n 2Signal Processing is further combined with temperature (T), air pressure (P), wind speed (u), the net radiation (R of meteorological element measurement module acquisition
n) and soil heat flux (G), just can realize the measurement of surface water thermoflux.
At first by C
n 2Calculate the temperature configuration parameters C of atmosphere
T 2:
According to Mo Ning-Ao Bu Hough surface layer atmosphere similarity theory, temperature configuration parameter and sensible heat flux have following relation:
H＝ρ
aC
pu
*T
* (7)
Wherein, f
TBe only relevant universal function with atmospheric stability.Expression formula is separately arranged under unstable and stable case, employing Andreas (1988, Journal of the optical society of America, 5:481-495) function of middle definition calculates:
At last, by energy equilibrium remainder method, obtain latent heat flux in conjunction with net radiation and soil heat flux.
LE＝R
n-G-H (10)
In order to transmit the observed reading of water and heat in real time to the user, the large scale water and heat recording geometry in the embodiment of the invention can also further be provided with transport module, and the related data transmission that this transport module is used for measuring is to user side.The transmission mode of data comprises traditional wired mode and wireless mode, and wherein, wireless transmission method can adopt suitable wireless transmitting system to realize, comprising: GSM and GPRS.
Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills promptly can understand and implement under the situation of not paying creative work.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation of the spirit or scope that do not break away from the embodiment of the invention in other embodiments.Therefore, the embodiment of the invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (9)
1. a large scale water and heat recording geometry is characterized in that described system comprises: transmitter and receiver; Wherein, described transmitter comprises: the high power transmission light source module is used to provide the light signal of respective wavelength; Power amplifier module is used for that described light signal is carried out power amplification and handles; Emission light signal modulation module is used for the light signal of handling through power amplification is carried out frequency modulation (PFM), forms the emission light signal; Emission light signal output module is used to export described emission light signal;
Described receiver comprises: the emission optical signal receiving module is used to receive the emission light signal that described transmitter is exported; Emission light signal demodulation module, be used for to described emission light signal amplify, noise reduction process, obtain and the relevant air refraction construction of indexes parameter of water and heat measurement; Energy consumption reduces module, is used for controlling described emission light signal demodulation module and enters low power mode of operation in the process that the observation data signal that described transmitter is provided carries out demodulation process.
2. large scale water and heat recording geometry according to claim 1 is characterized in that described power amplifier module also comprises: PCU Power Conditioning Unit, the output power that is used to regulate described power amplifier module.
3. large scale water and heat recording geometry according to claim 1 is characterized in that described high power transmission light source module comprises: large-power light-emitting diodes.
4. according to each described large scale water and heat recording geometry among the claim 1-3, it is characterized in that described transmitter also comprises:
The stabilized voltage supply control module is used for that voltage stabilizing is carried out in the power supply of described transmitter and handles.
5. large scale water and heat recording geometry according to claim 1 is characterized in that, described emission light signal demodulation module comprises:
Light signal amplifies submodule, is used for by logarithm operational amplifier described emission light signal being carried out elementary amplification, obtains the logarithm of described emission light signal light intensity;
The automatic gain controlling sub is used to remove the influence to described emission light signal of optical path route and optical aperture;
Filtering syndrome module is used for the carrier signal of described automatic gain controlling sub output is carried out further noise reduction process;
The operator module is used to utilize the yield value of the carrier signal of the logarithm of described emission light signal light intensity and the output of described filtering syndrome module to carry out computing, obtains the variance yields of the product of the logarithm of described emission light signal light intensity and described yield value;
Then described light signal amplifies submodule, also is used for by logarithm operational amplifier described variance yields being amplified, and obtains the output signal value with the proportional relation of described air refraction construction of indexes parameter.
6. large scale water and heat recording geometry according to claim 1 is characterized in that described emission optical signal receiving module comprises: the high sensitivity photodiode.
7. according to each described large scale water and heat recording geometry among claim 1-3, the 5-6, it is characterized in that described system also comprises:
Data acquisition module is used to gather the air refraction construction of indexes parameter of the sign turbulence intensity that described receiver obtains, and gathers the meteorological condition parameter, carries out the calculating of water and heat numerical value.
8. large scale water and heat recording geometry according to claim 7 is characterized in that described system also comprises:
The meteorological element measurement module is used to provide with water and heat and calculates relevant meteorological condition parameter.
9. large scale water and heat recording geometry according to claim 8 is characterized in that described system also comprises:
Transport module, the related data transmission that is used for measuring is to user side.
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