124 results about "Ground temperature" patented technology

A porous media grouting test system and method taking temperature effects into consideration. The system comprises a porous media formation simulation model (1), a grouting system (2), a water level adjustment system, a formation temperature control system and a data analysis system, wherein the porous media formation simulation model (1) is used for simulating a porous media formation; the water level adjustment system and the formation temperature control system are used for simulating the conditions of different water saturation levels and different water temperatures and ground temperatures; and the data analysis system is used for comparing different time-series data collected by sensors such as a temperature sensor and a pressure sensor with data such as temperature data and pressure data that is obtained by means of coupled solving of a heat transfer equation and a momentum equation, so as to verify and analyze a grouting diffusion path. Free simulation of different water saturation levels is realized by means of a water level adjustment system, and simulation of different ground temperatures is realized by means of a formation temperature control system, thereby realizing the research on grouting diffusion under different water levels and different water temperatures and ground temperatures.

The invention provides a permafrost region ventilation pipe foundation design method based on a heat balance principle, and aims to keep heat balance of permafrost on the lower portion of a foundation and ensure long-term heat stability of the foundation. According to the method, meteorological data, soil physical parameters and permafrost upper limit and ground temperature distribution information are collected so as to evaluate whether additional protection measures are needed or not and determine the burying height of the ventilation pipe foundation. And based on the selected ventilation pipe configuration, the air speed in the pipe is calculated by using a corresponding air speed calculation formula, and the convective heat transfer coefficient is determined accordingly. And determining the diameter of the pipeline by combining the convective heat transfer coefficient and the economical efficiency. And the cooling radius and the optimal operation mode of the ventilation pipe foundation are further determined, so that heat balance at the bottom of the foundation is ensured, and permafrost at the lower part of the foundation is effectively protected. The design method is simple, convenient, rapid and accurate, and has important engineering application value and wide applicability.

The invention provides a temperature control type anti-frost-heaving retaining wall structure and a design method thereof, and belongs to the technical field of infrastructure retaining engineering in cold regions, the temperature control type anti-frost-heaving retaining wall structure comprises a retaining wall body, a ground temperature energy conversion system and an intelligent control system, and the ground temperature energy conversion system is connected with the retaining wall body; the ground temperature energy conversion system is used for absorbing ground temperature energy, converting a gas-state heating medium from a low-pressure state into a high-pressure state, adjusting the flow of a liquid-state heating medium, reducing the pressure of the heating medium and dissipating the ground temperature energy into the retaining wall body, and the intelligent control system is electrically connected with the ground temperature energy conversion system; the controller is used for monitoring the temperature of filling soil on one side of the retaining wall body and controlling the ground temperature energy conversion system to operate according to the filling soil temperature so as to control the retaining wall body temperature and filling soil heat. The technical problems that the retaining wall frost heaving disease control difficulty is large, and the frost damage prevention and control effect is poor are solved, and the technical effects that the retaining wall and the filling temperature can be controlled, frost heaving disease control is easy, and the frost damage prevention and control effect is good are achieved.

The invention relates to the technical field of ground source heat pumps, and discloses a ground source heat pump buried pipe zoning layout and cold and heat balance control method which comprises the following steps that the current three-dimensional ground temperature field state of the area where a ground source heat pump buried pipe is located is obtained; predicting a future state sequence of the ground temperature field under different control strategies in a future prediction time domain; solving to obtain an optimal control sequence based on a multi-objective optimization function which aims at minimizing the comprehensive operation cost of the system in the prediction time domain; the multi-objective optimization function at least comprises an energy consumption item representing system short-term operation energy consumption and a balance item representing a ground temperature long-term balance state; and executing the first control action in the optimal control sequence. The prediction model constructed by the invention can combine a physical rule with a data residual continuously learned from actual operation, and ensures that prediction information on which a control decision depends always keeps high fidelity in long-term operation of the system.

The invention relates to the technical field of permafrost region roadbed cooling, and particularly discloses a permafrost region circulating ventilation roadbed cooling system fused with machine learning. The volume moisture content, the ground temperature and the deformation of the lower part of the roadbed are respectively monitored through a moisture sensor and a distributed optical fiber sensor; the machine learning algorithm module comprises a Prohet time sequence model, and is used for collecting, analyzing and predicting future temperature and ground temperature changes through the Prohet time sequence model; and the control module comprises a fuzzy control strategy and a PID control algorithm. By fusing environmental data and roadbed state data of an artificial intelligence algorithm, opening and closing of the ventilation pipe are automatically controlled, and the problem of thaw collapse deformation of a roadbed in a permafrost region is eliminated and relieved.

The invention belongs to the technical field of cultivation, and discloses a small flat film heat preservation cultivation method for amorphophallus bulbifer in cold and arid areas, and the small flat film is used for covering, so that the ground temperature can be increased, and early sowing and early harvesting of the amorphophallus bulbifer are promoted. The temperature in the mulching film is 7-9 DEG C higher than that in the open field, amorphophallus bulbifer can be sown 30 days earlier, and seedlings emerge 15 days earlier. In addition, the small flat film can reduce water evaporation, prevent rainstorm scouring and keep the soil water content stable, and drought resistance and waterlogging prevention are facilitated.

The invention discloses a method for evaluating rock mass fracture freeze-thaw fracture damage risk based on surface temperature, which comprises the following steps: S1, carrying out data acquisition on a target area based on a multi-source sensor carried by an unmanned aerial vehicle platform, and obtaining fracture geometric parameters, daily surface minimum temperature, daily surface maximum temperature, daily temperature difference and fracture moisture conditions; s2, on the basis of the geometric parameters of the crack, constructing a crack frost heaving force analytical model; obtaining a quantitative relation between the stress intensity factor and the environment temperature; s3, the I-type fracture toughness of the target rock mass is measured, and the critical crack initiation temperature of the rock mass is determined; determining the number of critical freezing and thawing cycles; s4, on the basis of the daily earth surface minimum temperature, the daily temperature difference, the fracture moisture condition and the critical crack initiation temperature, the annual accumulated effective freezing and thawing cycle number is obtained; and calculating a freeze-thaw damage ratio, and carrying out risk quantification and grading. According to the invention, the problem of inaccurate evaluation caused by limitation to local monitoring and lack of an environment factor and material parameter integrated evaluation framework in the prior art is solved.

A sensor arrangement is disclosed for determining upcoming operating conditions of a wheel of a vehicle. The sensor arrangement comprises at least one temperature sensor configured to be mounted in vicinity of the wheel. The at least one temperature sensor is configured to measure a ground surface temperature of a portion of the ground surface to be traveled by the wheel, and a tire temperature of the outer surface of a tire of the wheel. A computer system is also disclosed. The computer system comprises processing circuitry configured to receive measurement data from the sensor arrangement, and to predict an upcoming rolling resistance and / or an upcoming tire-ground friction based on the measurement data. Corresponding operating conditions determination system, vehicle, computer-implemented method, computer program product, and non-transitory computer-readable storage medium are also disclosed.

The invention discloses a frozen soil annual average ground temperature simulation method based on air temperature. The method comprises the following steps: firstly, determining a research area and a year interval; then data acquisition and arrangement are carried out; the data comprises near-surface air temperature data, land coverage data and accumulated snow depth data, according to the determined research area and year interval, acquiring near-surface air temperature data with the spatial resolution of 1km and the time resolution of daily scale corresponding to the research area and year, land coverage data and accumulated snow depth data with the spatial resolution of 1 km in the corresponding research area and year are obtained, then key parameters of the model are calculated, and finally the annual average ground temperature of frozen soil is calculated. Simulation calculation is carried out on the annual average ground temperature of frozen soil in a research area.

The present invention relates to a ground collector system as a basis for a local heating network with heat pumps and a method for utilizing the temperature of the ground. Conventional ground collectors are installed at shallow depths, and the underlying soil must first be excavated. The invention proposes a ground collector system for the deep working levels of opencast mines, with the pipes (2) of a heat transfer medium circuit being laid on working and dumping levels exposed for raw material extraction in the opencast mine. The invention allows areas affected by open-cast mining to be reused in an ecologically and economically viable manner.

The application discloses a kind of deep melting interlayer development area rigid pile composite foundation structure design method, it is related to rigid pile composite foundation field, including the following steps: step one, in the existing rigid pile bearing capacity calculation process, front-end increase subgrade-ground temperature field analysis;Step two, increase groundwater analysis;Step three, determine the compression modulus of the soil layer of seasonal freeze-thaw layer, (water-rich) melting interlayer, permafrost layer, bearing capacity characteristic value, check the single pile bearing capacity characteristic value of different positions in the cross section of roadbed using different pile length, pile diameter, pile body stiffness material;Step four, carry out zoned unequal design, adjust pile length, pile diameter, pile body stiffness, so that the range of all pile single pile bearing capacity characteristic values in cross section is lower than design allowable value.The application effectively optimizes pile foundation design, reduces material waste, reduces engineering cost, while ensuring the safety and stability of structure.

The present invention provides a high-temperature tunnel insulation segment and a preparation method thereof, wherein the high-temperature tunnel insulation segment comprises: a concrete layer, a steel skeleton, and a plurality of triangular inserted insulation tubes; the steel skeleton is a truss structure, and the steel skeleton comprises a plurality of main bars, a plurality of double-legged stirrups, and a plurality of angled steel bars; a plurality of the main bars are arranged at intervals along the width direction of the segment, and a plurality of the double-legged stirrups are arranged at intervals along the circumferential direction of the segment, and each of the double-legged stirrups is fixed to the outside of a plurality of the main bars; a plurality of the steel bars distributed adjacently along the circumferential direction of the segment are arranged inside each of the main bars; each of the triangular inserted insulation tubes is inserted into the interior of a plurality of the main bars and is in close contact with the steel bars and the main bars. The present invention can greatly improve the insulation performance of the segment while ensuring the basic strength and impermeability of the segment.

The application belongs to the technical field of data processing, and discloses a Mars rover non-contact passability prediction method and system based on thermal inertia, which comprises the following steps: obtaining the ground temperature time sequence and environmental parameters of a target area; constructing a thermal inertia estimation model, inputting the ground temperature time sequence and environmental parameters into the thermal inertia estimation model, and obtaining the thermal inertia estimation value of the soil; constructing a thermal inertia and passability index relationship model, inputting the thermal inertia estimation value of the soil into the thermal inertia and passability index relationship model, and outputting a predicted passability index; determining the passability state level according to the predicted passability index, and generating a navigation control suggestion, so that the Mars rover passes the target area according to the navigation control suggestion of the Mars rover. The application can effectively improve the evaluation accuracy of the Mars rover passing the target area by extracting the thermal inertia estimation value of the soil of the target area to predict the passability index of the Mars rover, and ensures the driving safety of the Mars rover.

The application provides a surface temperature-based surface ground temperature remote sensing measurement method, which comprises the following steps: expanding radiation terms of bare soil and vegetation at a target pixel into Taylor series at a remote sensing surface temperature respectively, establishing a remote sensing radiation equation of the remote sensing surface temperature by taking remote sensing vegetation coverage as a weight; solving remote sensing bare soil temperature and remote sensing vegetation temperature at the target pixel by combining the remote sensing radiation equation, a relationship equation of the remote sensing surface temperature and a remote sensing component temperature; expanding radiation terms of bare soil and vegetation at a simulation grid into Taylor series at a simulation surface temperature respectively, establishing a simulation radiation equation of the simulation surface temperature by taking simulation resolution vegetation coverage as a weight; solving simulation bare soil temperature and simulation vegetation temperature at the simulation grid by combining the simulation radiation equation, a relationship equation of the simulation surface temperature and a simulation component temperature; and estimating average surface ground temperature by using a correlation model between the simulation bare soil temperature and simulation surface ground temperature and the remote sensing bare soil temperature.

The invention discloses a novel verifiable ground temperature measurement system and method, and the method comprises the steps: employing three temperature sensors, placing the three temperature sensors in a thermostatic bath before starting, taking feature points for calibration, recording three temperature reference difference values, building a difference value database, enabling the three sensors to synchronously collect real-time temperature values per second, carrying out the real-time comparison of a current difference value with the reference difference values, and obtaining a temperature difference value database; judging and confirming fault sensors exceeding the deviation range, when only one fault sensor exists, obtaining a reckoning temperature value according to the reference difference value corresponding to the fault sensor and the other two real-time temperature values, taking an average value as a measurement result, and when two fault sensors exist, directly taking the measurement value of the first sensor as the measurement result. According to the invention, three core problems of precision control, fault tolerance and maintenance cost can be solved, and continuity and reliability of ground temperature monitoring are guaranteed.

The invention provides a method, a device and equipment for predicting influence of marsh vegetation change on surface temperature, and belongs to the technical field of ecological remote sensing and climate effect evaluation. The method comprises the following steps: firstly, determining vegetation pixel distribution as a research area range in an unchanged marsh wetland distribution range; a year-by-year and multi-year average growth season data set is constructed through a maximum value synthesis and arithmetic mean method; in the grid units, the pixels are divided into a high value group and a low value group according to the multi-year average growth season leaf area indexes, the difference value between the multi-year average growth season leaf area indexes of all the pixels in the high value group and the low value group and the average surface temperature value is calculated, and then the surface temperature change degree caused by the marsh wetland vegetation coverage change is quantified; and finally, realizing accurate prediction of future surface temperature influence in combination with a vegetation change trend on a pixel scale.

The utility model relates to the technical field of wiring protection devices, and discloses a sensor wiring arrangement device for ground temperature measurement in a cold region. The device comprises a protection body and a plurality of wiring pipelines, the protection body is of a cylinder structure, and the protection body is provided with a plurality of assembly holes which are used for installing sensors, have different positions in the length direction of a cylinder of the protection body and are formed in the outer wall of the protection body. And the wiring pipeline is arranged in the solid part of the protection body, and the wiring pipeline communicates the assembly hole to the end part of the protection body along the length direction of the cylinder body of the protection body. According to the embodiment of the invention, protection can be provided for the circuit of the sensor, and the troubleshooting difficulty of determining the disconnected sensor is reduced.

The invention discloses a high ground temperature and high water pressure rock SHPB (split Hopkinson pressure bar) device capable of high-speed camera shooting and real-time shooting, which comprises an SHPB assembly, a water pressure loading assembly, a water bath heating circulation assembly and a mounting flat plate, and is characterized in that a water outlet of the water bath heating circulation assembly is connected with a water inlet hole of the water pressure loading assembly; a backflow port of the water bath heating circulation assembly is connected with a water outlet hole of the water pressure loading assembly, an endoscope is installed on the side wall of the water pressure loading assembly, a lens of the endoscope is arranged in the water pressure loading assembly, the field angle of the lens is 45 degrees, and the output end of the endoscope is connected with a special high-speed camera for the endoscope. According to the invention, changes of water pressure, temperature and impact force can be simulated in a deep rock impact ground pressure test, simulation of a test environment is realized, a test result is more practical, continuous images of a rock deformation and fracture process in the test can be obtained, and initiation, expansion and evolution rules of cracks in the whole test process can be obtained in real time.

The invention discloses a water delivery tunnel maintenance ventilation numerical simulation method considering high ground temperature and biofouling, which comprises the following steps: carrying out a biologic putrefying gas release characteristic experiment in a high ground temperature environment, fitting a biologic putrefying gas release rate equation in the high ground temperature environment, calculating the required air quantity considering biologic putrefying gas pollution in the high ground temperature environment, and calculating the ventilation quantity of the water delivery tunnel maintenance ventilation numerical simulation method considering biologic putrefying gas pollution in the high ground temperature environment. And ventilation numerical simulation of the deeply-buried water conveyance tunnel in the overhaul period. According to the method, the emission amount and the emission rule of biological decay gas pollutants including organic gas TVOC in the deeply-buried water delivery tunnel in the high-ground-temperature environment are clearly considered; determining the air volume required for purifying biological decay gas pollutants including organic gas TVOC in the deeply-buried water delivery tunnel in the high-ground-temperature environment; biological decay gas release and ventilation numerical simulation of the deeply-buried water delivery tunnel in the overhaul period under the high ground temperature environment are comprehensively considered, the development condition of an air flow field in the tunnel and the migration and distribution rule of harmful gas under the high ground temperature and biological fouling coupling condition are determined, and the method has important significance for guaranteeing ventilation safety of the complex water delivery tunnel.

The application discloses a kind of high altitude permafrost engineering disturbance area's vegetation recovery method, comprising the following steps: to meet sowing time period, turn over, supplement grass seed, sowing time period is: deep 0 cm place consecutive 10 days daily average ground temperature value is not less than first preset temperature value and deep 50~60 cm place consecutive 12 daily average ground temperature value is not less than second preset temperature value after the deadline 3~10 days;Cover multilayer covering net, until deep 0 cm place consecutive 8 days average ground temperature value is not less than third preset temperature value, remove part of covering net, only remain a layer of covering net;When grass seedling grows to 5~8 cm, remove last layer of covering net.The application is limited by the daily average ground temperature value of deep 0 cm in frozen soil disturbance area and deep 50~60 cm in frozen soil disturbance area, which helps to keep the endosperm cells inside active after seed sowing, increases the germination rate of grass seeds, and has good vegetation recovery effect.

The utility model discloses a multilayer ground temperature measuring device, which relates to the technical field of ground temperature measurement, and comprises a measurer body, a temperature measuring rod body fixedly connected to the bottom of the measurer body, and a temperature measuring fixing mechanism used for fixing the measurer body when the measurer body and the temperature measuring rod body are used for measuring temperature, through the arrangement of the temperature measurement fixing mechanism, when the measurer body and the temperature measurement rod body carry out temperature measurement work, the measurer body can be fixed through the arrangement of a first insertion column and a second insertion column, the friction force between the measurer body and the ground during use is improved, and temperature measurement errors caused by movement of a measured object can be eliminated through stable fixation; and meanwhile, the temperature measurement fixing mechanism is arranged, so that an operator can more conveniently carry out temperature measurement work, and the stability of a measured object does not need to be ensured by spending extra time and energy. The working efficiency can be improved, and the operation difficulty is reduced.

The present invention provides a method for planting a plant using a heat-shielding plate, the method comprising the steps of: preparing a heat-shielding plate by applying a polymethyl methacrylate (PMMA)-based heat shielding paint containing a heat-treated mineral-derived powder to at least one surface of a porous substrate; cutting the heat-shielding plate; forming an excavated surface by performing excavation at a location where a plant is to be planted where a plant is to be planted; arranging the heat-shielding plate around the excavated surface such that the excavated surface is exposed; and fixing the heat-shielding plate to the ground. According to the method, solar radiant heat is reflected to reduce the ground temperature, suppress evaporation of moisture, and maintain air permeability, thereby creating an environment favorable to plant growth.

The present invention provides an air conditioning device comprising a sensing module mounted on a ceiling and providing a controlled field of view pointing downward to the ground, the sensing module comprising a thermopile sensor for detecting the ground temperature and a plurality of area sensors; the plurality of area sensors are configured to detect whether people exist in different detection areas in the controlled view field or not; the first correction part is configured to call a corresponding linear correction coefficient based on the environment temperature of the air-conditioned room and correct the ground temperature detected by the thermopile sensor by using the linear correction coefficient to obtain a first corrected ground temperature; the second correction part is configured to call a human body temperature compensation value corresponding to the position of a detection area based on the detection area where a person exists, and correct the first corrected ground temperature to obtain a second corrected ground temperature; and a control section configured to control operation of an execution component in the at least one refrigeration cycle based on the second corrected ground temperature or to estimate whether or not there is a malfunction in the air conditioning device. According to the invention, accurate ground temperature detection can be realized.

The present application provides a wing hot air anti-icing control system and an air anti-icing pressure control method. The system comprises a wing anti-icing valve, a wing anti-icing pressure sensor, a wing anti-icing temperature sensor, a wing anti-icing ground temperature monitoring sensor, a wing anti-icing monitoring pressure sensor, a wing anti-icing controller, a bleed air fan valve and a flute type pipe. The wing anti-icing controller comprises independent control channels and monitoring channels, and the wing anti-icing valve comprises independent valve shutdown circuits and valve adjustment circuits. The present application can realize ground and air anti-icing, and the anti-icing is more accurate according to the wing anti-icing pressure sensor than the anti-icing according to the reference upstream bleed air temperature. In the case of single-engine bleed air anti-icing, bleed air failure or performance decline, etc., the anti-icing or maximum anti-icing can still be performed under the condition of ensuring the optimal aircraft. Therefore, the present application can not only effectively reduce energy consumption, improve economy and safety, but also has good anti-icing effect and good universality.

In recent years, global warming has caused the temperature of the earth's surface to rise, resulting in the loss of vegetation covering the surface. As the exposed ground temperature rises, the surface comes into direct contact with the hot air, causing moisture to evaporate and resulting in the loss of moisture on the surface. [Solution] The leaf collection device of the present invention solves the above problem by comprising a leaf collection device having multiple rows of rectangular introduction holes in the horizontal and vertical directions that introduce fallen leaves using multiple vertical pieces arranged at predetermined intervals in the horizontal direction and multiple horizontal pieces arranged at predetermined intervals in the vertical direction that intersect the vertical pieces.

The invention provides an aircraft thermal structure on-orbit circulation and reentry atmosphere mission profile ground temperature loading method, a three-cabin intercommunicated temperature test device is established, three temperature loading environments can be provided, a test piece can be transferred among the three test cabins through a guide rail, rapid heating and cooling required by a test are provided, and the test efficiency is improved. A temperature load environment for providing on-orbit temperature circulation and reentry atmosphere aerodynamic heat for a test piece can be simulated, and engineering requirements are met.

The application provides a deep-buried tunnel original rock temperature prediction method, which utilizes field drilling measured data, tunnel surrounding rock measured temperature and data provided by a ground temperature database to obtain the original rock temperature of the whole tunnel through Akima spline interpolation method, wherein the ground temperature database is obtained through the following steps: collecting measured data of published ground temperature drilling in a certain area, pre-processing the measured data, and then performing spatial interpolation in the area by using a general Kriging method. The method solves the problems of great difficulty, long time consumption and high drilling cost in original rock temperature prediction of deep-buried tunnels, reduces the workload and calculation time on the basis of scientifically predicting the original rock temperature of deep-buried tunnels, is more suitable, is more in line with the actual engineering conditions, and improves the accuracy of the prediction result.

The ground temperature adjusting water tank comprises a first tank body, a second tank body and a third tank body, the top of the first tank body is communicated with a main machine water supply pipeline, a tail end water supply opening is formed in one side of the main machine water supply pipeline, and a main machine water outlet is formed in the other side of the main machine water supply pipeline; a one-way differential pressure valve is arranged at the communication position of the first tank body and the main machine water supply pipeline, a sewage draining exit is formed in one side of the first tank body, and a main machine water return opening is formed in the bottom of the first tank body. Through the unique structural design of the first tank body, the second tank body and the third tank body, low-temperature water and high-temperature water are respectively supplied during refrigeration in summer, the water flow direction is changed by controlling the three-way valve, dew-point water temperature control of the high-temperature water is realized by utilizing inertia of mixed water in the water tank, and the refrigeration efficiency is improved. Proportional adjustment is replaced with a simple mechanical control method, and the equipment cost and the failure rate are greatly reduced.

The embodiment of the invention provides a high-ground-temperature tunnel ventilation cooling environment simulation test device, and relates to the technical field of high-ground-temperature tunnel construction. The high-ground-temperature tunnel ventilation cooling environment simulation test device comprises a tunnel simulation carrier, and a tunnel face is integrally formed at one end of the tunnel simulation carrier. Powder is fed into the vibration dust feeding assembly through the dust feeding bearing assembly, the high-temperature powder is fed into the dust scattering assembly through cooperation of the vibration dust feeding assembly and the temperature increasing heat transfer assembly, and meanwhile the powder fed into the dust scattering assembly is blown into the tunnel simulation carrier through cooperation of the vibration dust feeding assembly and the floating dust sowing and spraying assembly. When the ventilator body works to drive the powder in the tunnel simulation carrier to drift away, according to the characteristics of the powder and the cooperation with the thermal imaging detection component, the dynamic flow direction of the powder drifting along with the wind is obtained in real time, and the flow direction of air during cooling of the ventilator body is obtained accordingly. And a more accurate data support is provided for the ventilation cooling and dust falling environment of the actual high-ground-temperature tunnel construction.