1769 results about "Soil moisture content" patented technology

The invention discloses a system for predicting geologic hazard based on rainfall intensity, moisture content of slope soil and deformation. The system comprises an automatic rainfall gauge, a soil moisture sensor, an omnibearing tilt sensor, an omnibearing vision sensor, an embedded system and a monitoring center computer, wherein the automatic rainfall gauge is used for monitoring rainfall and rainfall intensity of a geologic hazard point; the soil moisture sensor is used for monitoring moisture in soil at the geologic hazard point; the omnibearing tilt sensor is used for detecting earth surface deformation and internal deformation of the geologic hazard point; the omnibearing vision sensor is used for evaluating geologic hazard scale; the embedded system is used for wirelessly transmitting video and monitoring data; and the monitoring center computer is used for predicting and forecasting the geologic hazard and comprises a communication module, a data receiving module, a rainfall and rainfall intensity-based geologic hazard prediction module, a slope displacement-time curve-based geologic hazard prediction module, a soil moisture, rainfall and rainfall intensity-based geologichazard prediction module and a soil moisture content and slope deformation-based geologic hazard prediction module. The system has the advantages of complete monitoring means, accurate prediction andforecast, high intelligence and on-line real time.

The invention provides a method for assimilating remote sensing data of soil humidity in a watershed scale. The method comprises the following steps of: improving a watershed runoff producing calculation module and developing a distributed hydrological model which is suitable for assimilating remote sensing soil humidity information and describes a soil hydrodynamic process; introducing a particle filtering sequence data assimilation method of information science, and continuously merging and assimilating new remote sensing observation data in a dynamic operation process of distributed hydrological process numerical simulation so as to acquire updated watershed soil humidity assimilated data during sequential assimilation; feeding the updated watershed soil humidity assimilated data back to a distributed hydrological model platform; and gradually estimating the time and space distribution pattern of watershed soil moisture content. Practices prove that by the method, not only high-precision and physically consistent watershed soil humidity data can be provided for research on hydrology, zoology, environment and agriculture, but also the foundation is laid for performing four-dimensional data assimilation processing on soil humidity data of an upper soil layer acquired by using remote sensing retrieval, and improving the precision of the model.

A soil parameter measurement arrangement includes a capacitive based soil moisture and salinity sensor, a predetermined moisture migration medium located in a volume adjacent said sensor so that the medium substantially occupies the field of influence of said sensor. The medium is in moisture communication with the soil to be measured, and said sensor is adapted to measure and produce data representative of the volumetric water content of said medium. A sensor data processing means determines both the soil moisture and salinity of said medium. By using the measured volumetric soil moisture content and the moisture release curve of the medium, it is possible to derive the matric potential of the soil. The measured salinity of the medium corresponds to the salinity of the soil that is in moisture communication with the medium.

The invention discloses a crop growth information monitoring system and method based on internet of things. The system comprises an information perception system, a wireless transmission system and anintelligent management system, wherein the information perception system includes a soil moisture content monitoring module, a plant disease and insect pest monitoring module, a crop nutrition statemonitoring module, a weed monitoring module and a crop condition monitoring module. After crop planting, relevant information and threshold values of a crop growth environment are set through an intelligent management system interface, the soil moisture content, diseases and insect pests, nutritional status, weed growth and growth vigor information of growing crops are acquired through the perception system in real time and are sent to a server for data storage, analysis and display, if the information exceed threshold values, workers are remind of corresponding processing, plants are helped to accurately judge the crop growth conditions, real-time effective decision information is provided for accurate operation, the problem is solved that the crop growth conditions in planting field pieces need to be checked regularly in traditional planting process and accordingly the labor intensity is high, the labor cost is reduced, and the operating efficiency and accuracy are improved.

A system monitors growth characteristics of a plant having a root buried in a prescribed volume of ground using a plurality of electrodes inserted into the ground at a known spacing relative to one another in proximity to the root or root-like structure. When electrical current is applied to some of the electrodes, electrical potential is measured at other ones of the electrodes to construct a representation of electrical impedance across the prescribed volume locating the root or root-like structure. Growth characteristics of the soil and the plant, for example root size, root shape, soil moisture content, and the like, can be identified by locating variations of the electrical impedance.

The invention relates to a geometric structure of a workpiece of a vehicular sensor used for measuring soil moisture and compactness, in particular to a conical soil-engaging component with an abrasion-resistant geometric structural surface. The component consists of a substrate and bionic geometric structure units distributed on the surface of the substrate and is characterized in that: the bionic geometric structure units comprise a convex hull type, a concave pit type, an annular convex rib type, an annular concave rib type, a spiral convex hull type, a spiral concave pit type, a spiral convex rib type and a spiral concave rib type. The component aims to solve the problem of the abrasion of a conical head of a sensor when the soil moisture and the compactness are measured. The bionic geometric structure units and the substrate are of an integrated structure. The component is made of 1Cr18Ni9Ti, Cr15 or Si60Mn2.

The invention discloses a land surface soil moisture downscaling method based on multisource remote sensing satellite merged data and is particularly applicable to cloudy and rainy areas. The method comprises the following steps: collecting and arranging a passive microwave soil moisture data set, an LST (land surface temperature) and NDVI (normalized difference vegetation index) data set and DEM(digital elevation model) data; performing spatial interpolation on LST images with serious pixel deletion affected by cloud and rain by adopting an NDVI and DEM data set as auxiliary data to obtain aday-by-day LST data set almost totally covering a research area; constructing a mathematic relation model for microwave soil moisture with optical remote sensing LST and NDVI by a geographical weighted regression model, and obtaining a land surface soil moisture data set with high spatial resolution with the mathematic relation model. Through the adoption of the method, reliability of a descalingresult and universality of descaling in the wide-range research area are improved effectively, and precision and efficiency of wide-range space mapping and monitoring for soil moisture content in thecloudy and rainy areas are improved.

The invention discloses an irrigation control method and system based on crop root zone soil moisture and root distribution. The method comprises the steps that parameters are set, soil water content in each soil layer of a root zone is monitored, root zone weighted average soil water content is computed according to relative root length density distribution, a crop water stress index (CWSI) is computed, when the CWSI computed value is larger than a preset CWSI critical value, irrigation is started; theoretical irrigation amount can also be computed according to planned moisture layer soil water content, and when practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system, the water stress degree of crops can be accurately and conveniently estimated, the fact that the root zone soil moisture distribution conditions and the crop moisture conditions are considered during irrigation is controlled according to the water stress degree, and an effective tool is provided for realizing of the purposes of water saving and production increasing.

The invention discloses a simulation test system integrating the start, movement and accumulation of debris flow, including an instrument table, a water supply system, a control center, a pipeline and a water distribution system, a receiving line, an electromagnetic flowmeter, a water guide pipe, and a raindrop simulation system. Sprinklers, rain sensors, source tanks, porometers, matrix suction probes, soil moisture probes, flow tanks, flow rate test devices, impact test devices, stacking plates, tailing tanks, lifting systems and digital acquisition systems. The invention can combine the two types of mud-rock flow caused by rainfall and water erosion for research, and simulate the real rainfall process; it can effectively monitor the key parameters in the mud-rock flow experiment process, and simulate the whole process of mud-rock flow initiation, migration and accumulation.

The invention discloses a data assimilation method for monitoring soil moisture. The method provided by the invention at least comprises an assimilation cycle, and each assimilation cycle comprises the following steps: (1) an ecological process model serves as a dynamic model to stimulate the space distribution state of soil moisture every day, the initial value in the dynamic model is an initial parameter and an initial soil moisture data, and the dynamic model is operated to output simulative soil moisture data; remotely sensed data on the soil surface is performed with inversion to obtain surface layer soil moisture data; the simulative soil moisture data in the remotely sensed data corresponding date is combined with the surface layer soil moisture data obtained by remotely sensed data inversion for data assimilation so as to obtain an optimized ecological process model parameter; (2) the optimized parameter is substituted into the dynamic model in step (1) to operate the dynamic model so as to obtain simulative soil moisture data every day. The method provided by the invention can connect soil moisture variety with vegetable physiological response mechanism by water deficit and stress, which improves the precision of field soil moisture monitoring and drought evaluation and has important application prospect.

A soil moisture wireless measuring device comprises two parts, namely a wireless sensing device and a wireless setting device which is connected with the wireless sensing device and is used for detection operation. The wireless sensing device which is used to measure soil water content, soil temperature and soil compactness comprises an impedance converter, a pressure sensor, a temperature sensor, an information acquisition device, a second wireless communication module and a CPU processor. The wireless setting device which is designed as a hand held type instrument comprises a central controller, and a keyboard input module, a display module, a memory module and a first wireless communication module respectively connected with the central controller. The impedance converter consists of three parts, namely a signal source, a transmission line and a probe. The soil moisture wireless measuring device provided by the invention has the advantages that: the device is capable of measuring the soil temperature, soil compactness and soil water content simultaneously; the device has the performances of high bandwidth, high linearity and low power consumption; the device facilitates the realization of the real-time detection of field soil water content with brief design, simple operation and portability.

The invention relates to a method for determining the sandy soil moisture content based on a low-frequency ground penetrating radar ground method, which comprises the determining steps of: collecting ground penetrating radar data by utilizing a together-midpoint method to ensure the travel time of airwaves and ground waves; collecting the radar wave information of a soil section by utilizing a constant spacing method; calculating the dielectric constant of soil; substituting parameters to a formula to obtain the dielectric constant of soil; calculating the water content of soil; substituting the obtained soil dielectric constant epsilon to the formula theta=-5. 3*102+2.92*10-2epsilon-5.5*10-4epsilon2+4.3*10-6epsilon3 to obtain the soil water content. The method for determining the sandy soil moisture content based on a low-frequency ground penetrating radar ground method is suitable to the measurement of the soil water content in farmlands and small river basins, has the advantages of convenience, quick operation, high accuracy and no destruction and is especially suitable to the water content determination of sandy soil.

The invention discloses a method for planting potatoes in dry land in an all-film mulching ridging micro-furrow mode. The method includes the following steps of (1) land selection, (2) soil preparation, (3) fertilizer application, (4) ridging, (5) mulching, (6) seed preparation, (7) sowing, (8) field management, (9) disease insect and weed damage prevention, (10) harvesting and (11) waste film removing. The method has the advantages that (1) the number of rain collecting faces is increased, and the rainfall infiltration rate is increased; (2) soil moisture content on ridges and soil temperature are remarkably increased, and nutritional growth of the potatoes is promoted; (3) the soil moisture content on the ridges in rainy seasons is reduced, high-temperature high-humidity stress is relieved, and disease risks are reduced; (4) the potatoes are planted on the tops of the ridges, soil is loose, and tuber development is promoted; (5) mechanical topdressing is facilitated, and fertilizer can be directly applied to the micro ridges; (6) black mulching film is adopted to cover the whole land, and weed in the field is removed; (7) the rainfall utilization efficiency is remarkably improved, and the potato tuber yield is remarkably increased. The method has wide application prospects for potato planting in dry northwest areas.

The invention discloses a precision drip irrigation measuring and controlling system based on a wireless sensor network. The system comprises a plurality of soil moisture statue monitoring nodes arranged within field monitoring ranges; each soil moisture statue monitoring node comprises a plurality of soil moisture content sensors buried in different underground depths and a soil moisture statue signal processing module; the soil moisture statue signal processing module is used for sending control information to next precision drip irrigation control nodes through a ZigBee wireless communication unit; and each precision drip irrigation control node comprises a ZigBee low-power-consumption and short-range wireless communication module, a singlechip and a control execution unit. By the system, three-dimensional monitoring on soil moisture content of underground plant roots in the different depths can be realized, and the measuring and the controlling on precision drip irrigation can be realized without the support of fixed networks. The system has the characteristics of rapid development, strong destruction resistance and the like, is convenient to install and maintain, and is particularly applicable to rural areas with poor signal converge. Moreover, the communication cost is lower when the system is used in a large scale.

The invention provides a best water-saving irrigation method by wireless soil moisture monitoring. In the invention, a central control unit is arranged, and a wireless monitoring terminal and a wireless execution terminal are arranged in an irrigation field to perform network communication with the central control unit. The wireless monitoring terminal is provided with a soil moisture sensor and a soil nutrition sensor, wherein the sensors transmit data of current soil humidity and nutrition to the central control unit; the central control unit transmits a water-supplying and nutrition-adding command to the wireless execution terminal according to the current soil condition; and the wireless execution terminal determines the water supply amount and supplies water according to the command. The whole process is performed automatically, so the method saves mass labor force, especially saving mass water resources.

The invention provides an intelligent device and a method for irrigation rapid diagnosis. The irrigation rapid diagnosis method comprises: obtaining soil moisture data, obtaining weather data of the land on the day and in a forecast period, obtaining information of crops, and types of soil; according to the information of crops, the soil moisture data, the types of soil, and weather data, calculating irrigation lower limit rate of the crops and root zone average moisture content in each forecast day in the forecast period, analyzing and comparing the root zone average moisture content and the irrigation lower limit rate, to generate an irrigation suggestion; and showing the irrigation suggestion. Compared with an existing irrigation rapid diagnosis device, the provided diagnosis method is aimed at conditions of different crops in different regions, and gives comprehensive consideration to weather factors and actual water consumption characteristics, and provides relatively scientific and rational irrigation suggestion, so as to overcome defects of irrigating by manual experience to a certain extent.

The invention discloses a remote agricultural information intelligent analysis system and an agricultural environment regulation and control method. In the invention, a wireless network is deployed in the space related to agriculture production first and then all kinds of agricultural information including illumination information, air temperature information, humidity information, soil moisture content information, soil temperature information and the like required in the agricultural production are transmitted through the network; and the data of the collected information is sent to a data center through internet connection to realize the intelligent analysis of the agricultural information, and agricultural equipment is remotely operated according an expert database or self-defined regulation and control rules to realize remote management of the agriculture production. In the invention, a centrally managed agricultural analysis system scheme is established on the basis of public networks including the Internet, the 3G mobile network and the like, so that the public networks are effectively used to provide agriculture production personnel with a remote agricultural information collection and operation function, the efficiency of the agricultural production is improved and the labor intensity of the management is reduced.

A remote system for accurate irrigation and fertilization is characterized by comprising a field environment monitoring system an irrigation subsystem and a remote monitoring system, wherein the field environment monitoring system and the irrigation subsystem are connected to the remote monitoring system by a bus; the field environment monitoring system can set working parameters of the field subsystem and monitor working states and can send information to the remote monitoring system; the remote monitoring system sends out a standard value of a soil moisture content needed by current plant growth as well as instruction information adapted to a current plant growth period according to data information such as the plant growth period, the soil moisture content and an EC value of a current irrigation area obtained by the environment monitoring system; and the information is sent to the irrigation subsystem via wireless communication.