CN103674995A - Device and method for automatically monitoring and evaluating soil parameters - Google Patents
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Abstract
本发明提供一种土壤参数自动监测与评价设备及方法，其中，设备包括：利用核磁共振原理对被测原始土壤产生核磁共振信号的测量装置；与所述测量装置电连接，根据所述核磁共振信号对所述被测原始土壤进行即时分析，获取土壤参数的主控装置。本发明的方案适用于研究土壤的含水量、孔隙率、田间持水量、凋萎系数以及土壤水势与土壤墒情的关系等。
The present invention provides a soil parameter automatic monitoring and evaluation equipment and method, wherein the equipment includes: a measuring device that uses the principle of nuclear magnetic resonance to generate a nuclear magnetic resonance signal for the original soil to be tested; The signal is analyzed in real time on the measured original soil to obtain the main control device of the soil parameters. The scheme of the invention is suitable for studying the relationship between soil water content, porosity, field water holding capacity, wilting coefficient, soil water potential and soil moisture, and the like.
Description
Technical field
The present invention relates to science of water resources, agronomy and ecological experimental study technical field, relate in particular to the automatic monitoring of a kind of soil parameters and valuator device and method.
Background technology
At water percentage, porosity, field capacity and the wilting coefficient of monitoring soil different times, and evaluate the aspects such as soil moisture content and need badly and carry out relevant research work, this is also the study hotspot of the association areas such as science of water resources, agronomy, ecology.
In current research work, mensuration about soil parameters is mainly to take traditional indoor sampling and measuring method as main, is exactly specifically: get some tested soil body soil samples, through oven dry, compression, water filling, instrument weighs, observation, then carries out corresponding calculating and finally obtain soil parameters value.But because indoor soil and the residing physical environment of field soil comprise that the factor gaps such as temperature, humidity and wind speed are larger, and indoor traditional measurement speed is slower, unavoidably can spoiled soil structure in soil sampling process, be difficult to obtain precise information.
Summary of the invention
The technical problem to be solved in the present invention is to provide the automatic monitoring of a kind of soil parameters and valuator device and method, and measuring speed is very fast and can obtain comparatively accurate soil parameters.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of soil parameters monitoring and valuator device automatically, comprising:
Utilize nuclear magnetic resonance principle tested initial soil to be produced to the measurement mechanism of NMR signal;
Be electrically connected to described measurement mechanism, according to described NMR signal, described tested initial soil carried out to instant analysis, obtain the master control set of soil parameters.
Wherein, described measurement mechanism comprises:
Two box bodys, minute are arranged and wait greatly;
Be wound with the magnet of coil, be installed in respectively in described two box bodys;
Radiofrequency launcher, is installed in one of them box body;
Radio frequency receiver, is installed in another box body.
Wherein, on the top of described each box body, be removably fixed with balance plate; And/or
On box body, be provided with the setting nut of the position that regulates described radiofrequency launcher and described radio frequency receiver.Wherein, described master control set comprises:
Be electrically connected to described radiofrequency launcher, regulate the big or small radio-frequency (RF) switch of described radiofrequency launcher emitting electromagnetic wave frequency;
Be electrically connected to the converter that the electromagnetic wave signal of described radio frequency receiver output is changed with described radio frequency receiver;
Be electrically connected to described converter, the electromagnetic wave signal after conversion is analyzed, and the analyser of the output micro-structure diagram of initial soil section of surveying;
Be electrically connected to described analyser, show the display of the output signal of described analyser;
Be electrically connected to described display, described output signal is processed, obtain the single-chip microcomputer of soil parameters.
Wherein, described measurement mechanism also comprises: be electrically connected to described radio frequency receiver, the electromagnetic wave signal through soil is amplified, and export amplifying signal to the amplifier of described radio frequency receiver.
Wherein, the power supply of described master control set is accumulator or lithium battery.
Wherein, described master control set also comprises: the voltage transformer system being connected with described power supply.
Wherein, the said equipment also comprises: a casing, described master control set is arranged in described casing.
Wherein, on described casing, be also provided with handle.
Wherein, on described casing, be also provided with usb data chip interface.
Embodiments of the invention also provide a kind of soil parameters monitoring and evaluation method automatically, comprising:
Obtain and utilize nuclear magnetic resonance principle tested initial soil to be measured to the NMR signal producing;
According to described NMR signal, the tested initial soil in described field is carried out to instant analysis, obtain required soil parameters.
Wherein, the step of utilizing nuclear magnetic resonance principle to measure tested initial soil comprises:
Through in the magnetic field of described tested soil, by radiofrequency launcher, send electromagnetic wave signal;
Electromagnetic wave signal through described tested soil is amplified, produce the electromagnetic wave signal after amplifying, and output.
Wherein, according to described NMR signal, the tested initial soil in described field is carried out to instant analysis, the step of obtaining required soil parameters comprises:
The electromagnetic wave receiving is carried out to signal conversion;
Signal after described conversion is analyzed;
To the signal after by analysis, utilize nuclear magnetic resonance principle to show the micro-structure diagram of the initial soil section of surveying;
The micro-structure diagram of described initial soil section is carried out gray scale processing and calculates each gray-scale value number percent, obtain the soil parameters of each gray-scale value representative.
The beneficial effect of technique scheme of the present invention is as follows:
In such scheme, can directly measure and instant analysis the initial soil in field, can not destroy the prototype structure of soil, not only measuring speed is very fast, and can obtain comparatively accurate soil parameters.
Accompanying drawing explanation
Fig. 1 is the block diagram of the automatic monitoring of the specific embodiment of the present invention soil parameters and valuator device structure;
Fig. 2 is specific embodiment of the invention soil parameters monitoring and valuator device perspective view automatically;
Fig. 3 is the schematic flow sheet of the automatic monitoring of specific embodiment of the invention soil parameters and evaluation method.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, a kind of soil parameters of the specific embodiment of the invention is monitoring and valuator device 1 automatically, comprising: utilize nuclear magnetic resonance principle tested initial soil to be produced to the measurement mechanism 2 of NMR signal; Be electrically connected to described measurement mechanism, according to described NMR signal, described tested initial soil carried out to instant analysis, obtain the master control set 3 of soil parameters.
Described soil parameters measuring equipment, can directly measure and instant analysis the initial soil in field, can not destroy the prototype structure of soil, and not only measuring speed is very fast, and can obtain comparatively accurate soil parameters.
Shown in Fig. 2, in previous embodiment, preferably, described measurement mechanism 2 comprises: two box body 21a, 21b, minute be arranged and wait greatly; Be wound with magnet 22a, the 22b of coil, be installed in respectively in described two box body 21a, 21b; Radiofrequency launcher 23a, is installed in one of them box body 21a; Radio frequency receiver 23b, is installed in another box body 21b.
This measurement mechanism utilizes nuclear magnetic resonance principle, can carry out scanning survey to any not soil 4 of containing metal sheet, thereby be convenient to obtain rapidly the microstructural image of soil profile.
Shown in Fig. 2, in previous embodiment, preferably, on the top of described box body 21a, 21b, be removably fixed with balance plate 24a, 24b.Between balance plate 24a, 24b and box body 21a, 21b, available staple is connected, and balance plate 24a, 24b close proximity to ground are placed, and are convenient to like this control two box body 21a, 21b horizontal positioned, guarantees that radiofrequency launcher 23a is corresponding with radio frequency receiver 23b.Balance plate and box body are easily assembled, detachable, are convenient for carrying.
Described measurement mechanism 2 also comprises: be connected with described radio frequency receiver 23b, electromagnetic wave signal through soil is amplified, and export amplifying signal to the amplifier (not shown) of described radio frequency receiver 23b, wherein, this amplifier can be the incorporated amplifier of radio frequency receiver 23b, can be also independent amplifier.
In previous embodiment, further, described master control set 3 comprises: radio-frequency (RF) switch 31, is electrically connected to described radiofrequency launcher 23a, for regulating the size of radiofrequency launcher 23a emitting electromagnetic wave frequency; Converter 32, is electrically connected to described radio frequency receiver 23b, for the electromagnetic wave receiving is carried out to signal conversion; Analyser 33, for the electromagnetic wave signal after described converter 32 conversions is analyzed, the micro-structure diagram of the output initial soil section of surveying; Display 34, is electrically connected to described analyser 33, and the signal for to after described analyser 33 is analyzed, utilizes nuclear magnetic resonance principle to show the micro-structure diagram of the initial soil section of surveying; Single-chip microcomputer 35, be electrically connected to described display 34, for utilizing the program having set to carry out gray scale processing and calculate each gray-scale value number percent the micro-structure diagram of described tested initial soil section, can obtain the soil parameters of each gray-scale value representative, as the number percent of porosity of soil and actual water percentage, and carry out the evaluation of damage caused by a drought, result is presented on display 34 simultaneously.
Wherein, radio frequency (RF) switch 31 can artificially regulate the electromagnetic intensity of transmitting, moderate to guarantee electromagnetic intensity.RF switch 31 can regulate and control wave frequency at any time on demand.Display 34 can present image, data and evaluation result intuitively, thereby regional soil parameter is made to more deep evaluation.The display screen of display 34 and operation push-button plate 36 are positioned at same plane in addition, can control by direct control.By single-chip microcomputer 35, the Soil Microstructure image obtaining is carried out to gray scale setting, and calculate the corresponding area percentage of different gray-scale values, draw the porosity of soil of different gray-scale value representatives and the number percent of actual water percentage.Recycling field capacity, the relation of wilting coefficient and porosity, can obtain above two kinds of soil water constants.
In previous embodiment, further, described single-chip microcomputer 35 has memory function simultaneously, initial soil structural images and result of calculation can be stored and output, thereby reach artificial freely managing data information.
Shown in Fig. 2, in previous embodiment, described equipment also comprises a casing, described master control set 3 is arranged in described casing, preferably, described master control set 3 also comprises: be arranged at the usb data chip interface 37 on described casing, be connected with described single-chip microcomputer 35, for the normal data of regional soil is inputted to single-chip microcomputer 35; Single-chip microcomputer 35 will be by measuring the described soil parameters of gained, contrasts, and then judge that whether these regional soil 4 soil moistures content are normal with the corresponding data in the normal data of described regional soil 4.
Store the usb data chip (not shown) of regional soil normal data by usb data chip interface 37, the normal data of regional soil is offered to single-chip microcomputer 35.USB-database chip can be connected with measuring equipment by usb data chip interface 37, and USB-data chip can also directly be connected with computer simultaneously, carries out real-time update and the storage of data, is convenient for carrying and data processing.Itself can also store usb data chip and transferring data, realizes the dynamic transmission of data.
In the embodiment of a measurement soil moisture content, by described usb data chip interface 37, can insert the usb data chip of storage soil type arid parameter, complete in real time the data analysis of different soils, current soil soil moisture content is carried out to preliminary judgement.In this embodiment, the process of current soil soil moisture content being carried out to preliminary judgement comprises: by soil being launched and being received electromagnetic wave signal, utilize nuclear magnetic resonance spectroscopy principle, realize the micromechanism imaging of soil profile, then through single-chip microcomputer analysis and calculating, try to achieve porosity and the actual water percentage of soil profile.There is certain relation in known field capacity, wilting coefficient and porosity, utilizes the program that single-chip microcomputer has set indirectly to record field capacity and wilting coefficient.Whether the normal soil moisture content data in region in contrast usb data chip are differentiated this regional soil and are suffered from drought, if suffer from drought, evaluate damage caused by a drought rank, and final result can be presented on display.This installs simple operation, is applicable to field Fast Measurement soil moisture content, can realize undisturbed automatic Observation.Measuring accuracy is high, can be used for the responses of drought stress mechanism of regional soil.
According to the abovementioned embodiments of the present invention, by this determinator of usb data chip, when realizing zones of different soil moisture content mensuration, can also realize Analysis of drought regime and evaluation by contrasting normal time soil moisture content data.Soil damage caused by a drought weight directly concerns agricultural development and ecosystem balance, so soil drought assessment and early-warning and predicting have important practice significance, for the arid Real-Time Monitoring of coping with agriculture drought research and ecology-oriented provides immediate data support and technical support.
In above-described embodiment, the ultimate principle that tested soil moisture content is measured and evaluated is: owing to containing water in soil, there is the atomic nucleus of magnetic distance under high-intensity magnetic field effect, can absorb the electromagnetic radiation of suitable frequency, and the chemical environment of different molecular Central Plains daughter nucleus is different, to have different resonant frequencies, produce different resonance spectrums.Process converter is converted to another kind of form by signal, enters in analyser and record this wave spectrum to judge this atom residing position and relative number in molecule, by showing image in image-forming principle display, carries out afterwards evaluation analysis.Can calculate soil moisture content according to the image analysing computer program of having set in single-chip microcomputer, factor of porosity etc., and then according to field capacity, be 1/2 times of porosity, wilting coefficient is 1/4 times of porosity, calculate field capacity and wilting coefficient, with the degree of suffering from drought of identification plant.
In previous embodiment, the power supply 38 of described master control set 3 is accumulator or lithium battery.Preferably adopt large capacity lead accumulator, stand-by time is long, can realize the long-term operation in field, and assurance equipment normally moves.Whole device is equipped with another group power supply simultaneously, utilizes circumscription socket to connect, to ensure continuous working in the wild.Preferably, described master control set 3 also comprises the voltage transformer system (not shown) being connected with described power supply 38, for power supply, pass through after voltage transformer system, electric current is divided into high pressure and low-voltage circuit, connect respectively magnet, receiver, display system, analytic system and data processor etc., provide different consuming parts required power supply.
In previous embodiment, preferably, master control set 3 sidewalls are equipped with heat extraction fan 39, air hole (not shown), promotes master control set 3 inner air flows, can be to master control set 3 coolings, thereby inner each parts of assurance master control set 3 are normally worked, and can not be subject to temperature disturbance.For ease of carrying, the casing of master control set 3 is provided with handle 30, is convenient for carrying.
Specific embodiment of the invention soil parameters automatically monitoring is as follows with the Application Example of valuator device:
(1), first will contain the containment vessel of magnet system and radio-frequency signal generator and radio frequency receiver in the wild, box body 21a, 21b, insert in soil 4, utilizes metal balance plate 24a, 24b fixation measuring device 2 on ground.
(2) start measurement mechanism 2, open radio-frequency signal generator 23a and radio frequency receiver 23b, observation display 34.
(3) display 34 shows data and image, selects numerical key and function key, carries out data processing, and data handling procedure is carried out in default single-chip microcomputer 35 and usb data chip, and calling data file carries out the evaluation of damage caused by a drought.The result finally drawing is presented on display 34.
(4) after measurement finishes, press the zero setting key of measuring equipment 1, can make measuring equipment 1 recover original observer state.
Soil parameters of the present invention automatically monitoring is little with valuator device volume, and function is many, is convenient for carrying and installs, and is applicable to the correlation parameter of field Fast Measurement soil and evaluates soil moisture content.
Shown in Fig. 3, the specific embodiment of the invention also provides a kind of soil parameters monitoring and evaluation method automatically, comprises step:
S11, obtain and utilize nuclear magnetic resonance principle tested initial soil to be measured to the NMR signal producing;
S12, according to described NMR signal, the tested initial soil in described field is carried out to instant analysis, obtain required soil parameters.
In the automatic monitoring of above-mentioned soil parameters and evaluation method scheme, can directly measure and instant analysis the initial soil in field, can not destroy the prototype structure of soil, not only measuring speed is very fast, and can obtain comparatively accurate soil parameters.
In the embodiment of aforementioned measuring method, preferably, in described step S11,
Through in the magnetic field of described tested soil, by radiofrequency launcher, send electromagnetic wave signal;
Electromagnetic wave signal through described tested soil is amplified, produce the electromagnetic wave signal after amplifying, and output;
Specific implementation process comprises: by two box bodys that contain magnet system and radio-frequency signal generator and radio frequency receiver, insert in tested initial soil, wherein each box body top is connected with balance plate with staple, and described balance plate close proximity to ground is placed, be convenient to like this control two measurement box body horizontal positioned, guarantee that radiofrequency launcher is corresponding with radio frequency receiver; Two the parallel magnet of N, the S utmost point that are wound with coil are placed in soil to be measured both sides, to tested soil, apply an externally-applied magnetic field.The electromagnetic wave of radiofrequency launcher transmitting certain frequency, is received by radio frequency receiver after by amplifier amplifying signal through soil, produces nmr phenomena, and signal is exported along wire.
In the embodiment of aforementioned measuring method, further, step S12 comprises:
The electromagnetic wave receiving is carried out to signal conversion;
Signal after described conversion is analyzed;
To the signal after by analysis, utilize nuclear magnetic resonance principle to show the micro-structure diagram of the initial soil section of surveying;
The micro-structure diagram of described initial soil section is carried out gray scale processing and calculates each gray-scale value number percent, obtain the soil parameters of each gray-scale value representative.
Concrete, by the size of radio-frequency (RF) switch adjusting emitting electromagnetic wave frequency; The electromagnetic wave receiving is carried out to signal conversion; Signal after described conversion is analyzed; To the signal after by analysis, utilize nuclear magnetic resonance principle to show the micro-structure diagram of the initial soil section of surveying; Utilize the program having set, the micro-structure diagram of described initial soil section is carried out gray scale processing and calculates each gray-scale value number percent, obtain the soil parameters of each gray-scale value representative, as the number percent of porosity of soil and actual water percentage.Recycling field capacity, the relation of wilting coefficient and porosity, can obtain above two kinds of soil water constants.
In the embodiment of aforementioned measuring method, further, also comprise the micro-structure diagram of initial soil section and result of calculation are stored and the step of exporting, thereby reach artificial freely managing data information.
In the embodiment of aforementioned measuring method, preferably, described soil parameters measuring method, also comprises: usb data chip, by usb data chip interface, offers single-chip microcomputer by the normal data of regional soil; Single-chip microcomputer will be by measuring the described soil parameters of gained, contrasts, and then judge that whether this regional soil is normal with the corresponding data in the normal data of described regional soil.
Single-chip microcomputer has data processing and memory function, can also complete processing and the analysis of image under the program setting in advance.Single-chip microcomputer calculates the parameter of soil after initial soil image is processed, as water parameters, meanwhile, the normal data that can contrast in usb data chip is evaluated current soil, the arid etc. as whether.
One embodiment of measuring method according to the present invention, when realizing zones of different soil moisture content mensuration, can also realize Analysis of drought regime and evaluation by usb data chip by contrasting normal time soil moisture content data.
In the embodiment of aforementioned measuring equipment and measuring method, one or more in the water cut that described soil parameters is soil, porosity, field capacity, wilting coefficient, soil water potential or soil mechanical composition.
Specific embodiment of the invention soil parameters automatically monitoring has real-time with valuator device, the feature of portable and field studies.In science of water resources and agronomy field, this equipment can be used for studying the water cut of soil, porosity, field capacity, the relation of wilting coefficient and soil water potential and soil moisture content, and then research agricultural needs water in macroscopic view, the problem that water consumption and water resource are utilized, provides theory and technical support from agriculture drought resisting and water saving; In ecologic environment field, this equipment can be used for the fundamental research of pedogeography aspect, for the action oriented research of ecological environmental protection aspect provides immediate data and technical support.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. soil parameters is monitored and a valuator device automatically, it is characterized in that, comprising:
Utilize nuclear magnetic resonance principle tested initial soil to be produced to the measurement mechanism of NMR signal;
Be electrically connected to described measurement mechanism, according to described NMR signal, described tested initial soil carried out to instant analysis, obtain the master control set of soil parameters.
2. soil parameters according to claim 1 is monitored and valuator device automatically, it is characterized in that, described measurement mechanism comprises:
Two box bodys, minute are arranged and wait greatly;
Be wound with the magnet of coil, be installed in respectively in described two box bodys;
Radiofrequency launcher, is installed in one of them box body;
Radio frequency receiver, is installed in another box body.
3. soil parameters according to claim 2 is monitored and valuator device automatically, it is characterized in that, on the top of described each box body, is removably fixed with balance plate; And/or
On box body, be provided with the setting nut of the position that regulates described radiofrequency launcher and described radio frequency receiver.
4. soil parameters according to claim 2 is monitored and valuator device automatically, it is characterized in that, described master control set comprises:
Be electrically connected to described radiofrequency launcher, regulate the big or small radio-frequency (RF) switch of described radiofrequency launcher emitting electromagnetic wave frequency;
Be electrically connected to the converter that the electromagnetic wave signal of described radio frequency receiver output is changed with described radio frequency receiver;
Be electrically connected to described converter, the electromagnetic wave signal after conversion is analyzed, and the analyser of the output micro-structure diagram of initial soil section of surveying;
Be electrically connected to described analyser, show the display of the output signal of described analyser;
Be electrically connected to described display, described output signal is processed, obtain the single-chip microcomputer of soil parameters.
5. soil parameters according to claim 2 is monitored and valuator device automatically, it is characterized in that, described measurement mechanism also comprises: be electrically connected to described radio frequency receiver, the electromagnetic wave signal through soil is amplified, and export amplifying signal to the amplifier of described radio frequency receiver.
6. soil parameters according to claim 1 is monitored and valuator device automatically, it is characterized in that, the power supply of described master control set is accumulator or lithium battery.
7. soil parameters according to claim 6 is monitored and valuator device automatically, it is characterized in that, described master control set also comprises: the voltage transformer system being connected with described power supply.
8. soil parameters according to claim 1 is monitored and valuator device automatically, it is characterized in that, also comprises: a casing, described master control set is arranged in described casing.
9. soil parameters according to claim 8 is monitored and valuator device automatically, it is characterized in that, is also provided with handle on described casing.
10. soil parameters according to claim 8 is monitored and valuator device automatically, it is characterized in that, is also provided with usb data chip interface on described casing.
11. 1 kinds of soil parameters are monitored and evaluation method automatically, it is characterized in that, comprising:
Obtain and utilize nuclear magnetic resonance principle tested initial soil to be measured to the NMR signal producing;
According to described NMR signal, the tested initial soil in described field is carried out to instant analysis, obtain required soil parameters.
12. soil parameters according to claim 11 are monitoring and evaluation method automatically, it is characterized in that, the step of utilizing nuclear magnetic resonance principle to measure tested initial soil comprises:
Through in the magnetic field of described tested soil, by radiofrequency launcher, send electromagnetic wave signal;
Electromagnetic wave signal through described tested soil is amplified, produce the electromagnetic wave signal after amplifying, and output.
13. soil parameters according to claim 11 are monitoring and evaluation method automatically, it is characterized in that, according to described NMR signal, the tested initial soil in described field is carried out to instant analysis, the step of obtaining required soil parameters comprises:
The electromagnetic wave receiving is carried out to signal conversion;
Signal after described conversion is analyzed;
To the signal after by analysis, utilize nuclear magnetic resonance principle to show the micro-structure diagram of the initial soil section of surveying;
The micro-structure diagram of described initial soil section is carried out gray scale processing and calculates each gray-scale value number percent, obtain the soil parameters of each gray-scale value representative.
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Cited By (6)
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| CN104535591A (en) * | 2015-01-19 | 2015-04-22 | 石河子大学 | Method and device for monitoring soil moisture content of farmland soil in real time based on wireless electromagnetic waves |
| CN105651968A (en) * | 2016-03-04 | 2016-06-08 | 江苏大学 | Method using water potential instrument to online detect soil water content |
| CN106770417A (en) * | 2017-01-05 | 2017-05-31 | 浙江大学 | Rape drought diagnosis method and device based on nuclear magnetic resonance machine people |
| CN108537851A (en) * | 2018-03-29 | 2018-09-14 | 湖南农业大学 | A kind of detection method of soil moisture and its application |
| CN110596358A (en) * | 2019-10-22 | 2019-12-20 | 赵文政 | Method and device for detecting self-healing performance of mixture and storage medium |
| CN113237725A (en) * | 2021-07-13 | 2021-08-10 | 中国科学院、水利部成都山地灾害与环境研究所 | Low-temperature standardized sample preparation device and sample preparation method for ice-soil mixture |
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| CN104535591A (en) * | 2015-01-19 | 2015-04-22 | 石河子大学 | Method and device for monitoring soil moisture content of farmland soil in real time based on wireless electromagnetic waves |
| CN105651968A (en) * | 2016-03-04 | 2016-06-08 | 江苏大学 | Method using water potential instrument to online detect soil water content |
| CN106770417A (en) * | 2017-01-05 | 2017-05-31 | 浙江大学 | Rape drought diagnosis method and device based on nuclear magnetic resonance machine people |
| CN108537851A (en) * | 2018-03-29 | 2018-09-14 | 湖南农业大学 | A kind of detection method of soil moisture and its application |
| CN108537851B (en) * | 2018-03-29 | 2020-09-01 | 湖南农业大学 | Detection method of soil humidity and application thereof |
| CN110596358A (en) * | 2019-10-22 | 2019-12-20 | 赵文政 | Method and device for detecting self-healing performance of mixture and storage medium |
| CN113237725A (en) * | 2021-07-13 | 2021-08-10 | 中国科学院、水利部成都山地灾害与环境研究所 | Low-temperature standardized sample preparation device and sample preparation method for ice-soil mixture |
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