176 results about "Field conditions" patented technology

The invention provides a cross-scale nesting and fusion modeling method for a multi-scale geological model, which belongs to the field of geology and comprises four steps of multi-scale data preprocessing, data fusion, cross-scale nesting and fusion and dynamic coupling. According to the method, multi-source heterogeneous data can be integrated, data fusion is realized through a joint probability space, a variational assimilation framework, a fuzzy logic conflict factor and an alternating direction multiplier method, and the stability and precision of the model are improved by using a deep learning auxiliary fusion technology, such as a multi-scale convolutional adversarial network. Meanwhile, model parameters are determined through a volume average upscaling algorithm and random field condition simulation, dynamic adjustment is carried out through set Kalman filtering and localized set transformation Kalman filtering, and consistency, bidirectional feedback and iterative optimization of the parameters between the models are achieved. And finally, multi-scale convergence is realized through a dual grid strategy and restrictive interpolation, and convergence and dynamic balance of the model on the scale from kilometer to micrometer are ensured.

The invention discloses a mobile crossing frame capable of automatically unfolding a telescopic cloth net, and relates to the field of crossing frames for power line construction. A traditional electric power line crossing frame is usually built by adopting moso bamboos or steel pipes, and the building mode of the crossing frame is long in construction period and large in safety risk. The automatic net arranging device comprises a U-shaped frame body, a front automatic net arranging mechanism capable of automatically arranging a bearing net forwards, a rear automatic net arranging mechanism capable of automatically arranging the bearing net backwards, a telescopic stay cable and an adjustable connecting frame capable of adjusting a pitching angle and a horizontal rotation angle, wherein the extension length of the bearing net can be flexibly set according to field conditions; and a plurality of rolling shafts are arranged on a cross beam of the U-shaped frame body. The crane can be used as a mobile platform to carry out flexible mobile construction, the construction period is short, the telescopic stay cable can have pretightening force to synchronously extend with the front and rear automatic net arrangement mechanisms, the bearing capacity and flatness of the net blocking platform are enhanced, the adaptability and safety of large-span construction are improved, and the traction resistance of a wire can be reduced through the rolling shafts.

The invention belongs to the field of rapid detection of environment-friendly water quality, and particularly relates to a kit for rapidly detecting the concentration of fluorine ions in water and a use method thereof. The invention discloses a rapid detection kit for the concentration of fluorine ions in water. The rapid detection kit comprises a fluorine ion rapid detection reagent, a fluorine ion rapid detection color card, a detection accessory and a use method of the rapid detection kit. According to the invention, tedious operations such as solid powder, dangerous organic solvent and multi-step pipetting addition are not needed, the device is convenient to carry, and rapid, simple, high-precision and high-interference-resistance fluorine ion detection of non-specialized personnel under field conditions is realized.

The invention relates to the technical field of frozen soil sample confining pressure testing, and discloses a subarea temperature control dynamic confining pressure loading device suitable for an over-saturated frozen soil sample, which comprises a hydraulic machine device controlled by a console, an air pressure mechanism, a cooling mechanism and a multi-state confining pressure assembly, a flexible rubber three-dimensional strain stress sensing cylinder for accommodating a frozen soil sample is arranged in the middle of the multi-state confining pressure assembly, and a temperature sensor and a pressure sensor are arranged in the flexible rubber three-dimensional strain stress sensing cylinder; the multi-state confining pressure assembly is formed by stacking a plurality of groups of multi-state confining pressure units; according to the invention, complex stress transfer and non-uniform confining pressure among soil particles in a natural stratum can be simulated, and the simulation authenticity of the stress condition of the frozen soil sample is obviously improved. According to the invention, independent temperature control of soil body areas at different heights can be realized, a stable temperature gradient from the top to the bottom of a frozen soil sample can be accurately established, and a temperature boundary more conforming to field conditions is provided for research on mechanical behaviors of frozen soil.

The present invention discloses a device and method for quantitative collection, processing and preservation of liquid samples, comprising: a quantitative measuring chip and a porous material chip connected to the quantitative measuring chip via a structural member; the quantitative measuring chip is provided with a microchannel network having an inlet and multiple outlets; the porous material chip is provided with multiple processing and preservation units that dock with the multiple outlets when in a folded working state. Utilizing the device of the present invention, quantitative measurement of liquid samples from nanoliter to milliliter levels can be achieved. The present invention combines liquid sample collection, processing and preservation, and immediately performs post-processing such as antibacterial, drying, and enrichment upon completion of liquid sample collection, so that the sample can be preserved on the porous material chip for a long time, greatly facilitating the collection, processing and preservation of liquid samples. The present invention has a simple structure and is easy to operate, and can still maintain reliable performance under non-professional conditions or field conditions.

The invention provides a fault detection semi-supervised learning method for a three-dimensional seismic data sparse labeling scene. The fault detection semi-supervised learning method is used for realizing stable and continuous three-dimensional fault identification under the condition that only a small number of two-dimensional slices are labeled and a large number of voxels are not labeled. According to the method, firstly, a supervision mask is generated in a three-dimensional space based on two-dimensional marking, and supervision learning is executed only in an effective area to adapt to marking scarcity characteristics; and then, constructing a double-student model, keeping prediction coordination in an unlabeled area through mutual generation of pseudo labels, probability consistency and confidence constraint, and applying consistency constraint to overlapped areas of adjacent three-dimensional sub-blocks in combination with a teacher model so as to maintain spatial continuity of a fault structure. Through joint optimization of synthetic data pre-training and field data migration training, the model can still obtain reliable fault structure expression under the field conditions of strong noise, weak reflection and obvious cross-work-area difference.

The utility model discloses an isolation belt device for blocking and treating acid mine wastewater, and belongs to the technical field of mine wastewater isolation. The device comprises a buoy, an isolation belt fixing frame is arranged at the bottom of the buoy, a weight settling box is arranged at the bottom of the isolation belt fixing frame, and filler is filled in the weight settling box; biomass filler is arranged in the isolation belt fixing frame, and three-dimensional elastic brush filler is arranged on the front side and the rear side of the isolation belt fixing frame in a binding mode. The device disclosed by the utility model is simple in structure, can be effectively assembled according to site conditions, can be in contact with the bottom, realizes multi-depth treatment, can effectively reduce the concentration of dissolved oxygen converged into AMD, gradually improve the bottom layer environment, promote the growth of anaerobic microorganisms, perform biofilm formation synergistic treatment by using indigenous microorganisms and avoid the problem of adaptability of exogenous microbial agents, and can be effective for a long time; the cost and the risk of additionally adding nutrient sources and microorganisms are reduced.

The utility model relates to the technical field of cable supports, and discloses a cable support convenient for metro construction, which comprises a fixed frame, an object placing plate is attached to the outer wall of the fixed frame, a fixed sleeve is fixedly connected to the inside of a positioning block, a sliding block is slidably connected to the inner wall of the fixed sleeve, a sliding sleeve is fixedly connected to the upper surface of the sliding block, and the sliding sleeve is fixedly connected to the lower surface of the sliding block. The sliding sleeve is slidably connected to the interior of the positioning block, a limiting block is fixedly connected to the outer wall of the sliding block, a U-shaped sliding groove is formed in the fixing sleeve, the outer wall of the limiting block is slidably connected to the interior of the U-shaped sliding groove, and a sliding rod is fixedly connected to the lower surface of the sliding block. According to the utility model, the problems that the fixed design cannot meet variable requirements and the adaptability of the bracket is limited due to the fact that the storage plates are difficult to adjust are solved, and the purposes of flexibly adjusting the number, position and height of the storage plates and increasing the adaptability of equipment according to different construction requirements and field conditions are achieved.

The invention provides a configuration method for reconstructing a self-healing function of a traction power supply system, which adopts a hierarchical and hierarchical configuration mode, expands a mode flow step by step by a configuration tool according to an optional power supply network configuration scheme, intelligently selects an applicable action flow according to the current network condition during engineering application, and improves the self-healing function of the traction power supply system. The configuration of reconstructing the self-healing function is simply and quickly completed. According to the method, all action steps involved in the reconstruction self-healing process are switched, and meanwhile, switch attributes such as switch types, action time and synchronous actions are set for each switch, so that the reconstruction self-healing function can be completed more accurately, effectively and quickly. According to the method, real-time reconstruction self-healing process confirmation and modification can be provided, under the condition that a device is not restarted, the mode process is modified through a real-time human-computer interaction interface, the modified and confirmed reconstruction self-healing mode process is sent to a dispatching end for confirmation, and various unexpected field conditions can be flexibly coped with.

The invention relates to the field of construction quality management, and provides a tunnel lining construction quality management and control method and system.The method comprises the steps that first information and second information are obtained, and the first information comprises geological survey parameters of a tunnel target section, a lining design BIM model, concrete material parameters and construction equipment parameters; the second information comprises field condition information after the tunnel target section is demoulded; discrete element-finite element coupling simulation and multi-parameter space traversal analysis processing are carried out according to the first information, and a process parameter sensitivity map and a defect risk early warning database of lining construction are obtained; according to the process parameter sensitivity map, the defect risk early warning database and the second information, performing fusion to obtain a multi-physics field fusion feature tensor; performing traceability processing according to the multi-physical field fusion feature tensor to obtain a defect cause diagnosis report; and the construction parameters of the next target section are adjusted according to the defect cause diagnosis report. According to the invention, active early warning of the tunnel lining construction quality is realized.

The invention relates to the technical field of agricultural machinery, and discloses an intelligent dynamic regulation and control method for cleaning operation of a rice and wheat combine harvester, which comprises the following steps: setting an operation parameter initial value of a cleaning device according to operation condition information; the cleaning loss rate, the cleaning impurity rate and operation parameters are monitored in real time; the data obtained through real-time monitoring are compared with a preset threshold value, and the cleaning operation state is evaluated; the regulation and control priority is judged based on the combination of the cleaning loss rate state and the cleaning impurity rate state obtained through evaluation; a corresponding rule set is matched according to the judged priority and the cleaning operation state, and a parameter regulation and control decision is generated; calculating and executing parameter adjustment based on a parameter regulation and control decision, and performing loop iteration control after evaluating a regulation and control effect; automatic optimization of cleaning operation of the rice and wheat combine harvester is achieved through the intelligent dynamic regulation and control technology, manual intervention is not needed in the whole regulation and control process, cleaning parameters can be automatically adjusted according to field condition changes, and it is guaranteed that the cleaning loss rate and the impurity rate are stabilized within the ideal range.

The invention relates to the technical field of ocean engineering, in particular to a laboratory calibration method for reducing the flow velocity of a gravity anchor recovery force nozzle. The method comprises the following steps: S1, obtaining a field soil body needing gravity anchor recovery operation through a thin-wall soil sampler, and preparing a triaxial test sample; s2, calculating confining pressure and axial pressure according to field conditions; s3, the prepared sample is installed on a triaxial apparatus, the calculated confining pressure and axial pressure are applied, initial back pressure is applied through a back pressure system of the triaxial apparatus, and the water injection amount changing along with time is recorded; s4, performing a multi-pressure-difference test and fluid viscosity correction based on the initial back pressure applied in S3; and S5, according to a test result, carrying out actual working condition flow velocity conversion. The back pressure value is changed, the corresponding water injection rate and time are recorded, and the flow velocity is corrected in combination with factors such as fluid viscosity, so that the accuracy of an experimental result is improved, and a scientific basis is provided for optimizing a nozzle design.

The utility model discloses an extracorporeal circulation blood vessel connecting structure under a field operation condition, and relates to the technical field of medical instruments. The connecting structure comprises a connecting assembly I and a connecting assembly II; the two ends are respectively inserted into blood vessels on the left and right sides of the broken blood vessel; the first connecting assembly and the second connecting assembly are of the same structure and are symmetrically arranged, and each connecting assembly comprises a puncture assembly, a drainage tube and a connecting base arranged at the end of the drainage tube. The switching structure is connected between the first connecting assembly and the second connecting assembly. According to the extracorporeal circulation blood vessel connecting structure under the field operation condition, rapid and stable connection of broken blood vessels is achieved by designing the connecting structure and the switching structure, and therefore the treatment efficiency and the survival rate of wounded personnel in the field operation environment are remarkably improved.

The invention relates to the technical field of machine learning, and particularly discloses a remote intelligent control method for a gas pipeline multi-branch safety valve based on an AI model, and the method comprises the following steps: obtaining original flow data and pipeline inner wall image data of a plurality of branches of a gas pipeline; inputting the original flow data and the pipeline inner wall image data into a pre-trained flow correction model to obtain corrected flow data of each branch; based on the corrected flow data, a control instruction of each branch safety valve is calculated through a control algorithm, and the control instruction comprises the specific adjustment amount of the opening degree of the safety valve; and sending the control instruction to a safety valve execution device of a corresponding branch through a communication network. The negative influence of the corrosion form on the stability of the flow field is effectively eliminated, precise control over gas conveying under the non-uniform flow field condition is achieved, and the safety of a gas pipeline system and the gas supply stability are guaranteed.

System and method for determining at least one first measurement region for carrying out at least one measurement with a crop nutrient measurement device for providing a fertilizer recommendation based on position dependent yield data. Different embodiments for determination of the measurement regions regarding specific locations and field conditions are disclosed.

This invention discloses a hydrophobicity rating system for superhydrophobic surfaces of energy equipment, relating to the field of hydrophobicity rating technology. The system includes a data acquisition module, an optimal parameter combination module, a sample preparation module, a hydrophobicity quantification and evaluation module, a test closed-loop calibration module, and a hydrophobicity rating classification and output module. These modules are interconnected, and through their collaborative operation, the system quantifies, performs closed-loop calibration, and classifies the hydrophobicity index of superhydrophobic samples of energy equipment with different microstructures. The closed-loop calibration process fully considers both anti-icing and weather resistance, significantly improving the accuracy and generalization ability of the hydrophobicity rating results. This solves the problems of inaccurate evaluation results and inability to adapt to extreme field conditions caused by traditional evaluation systems relying solely on conventional laboratory environments, single physical tests, and empirical thresholds for rating. This enhances the intelligence level of hydrophobicity rating evaluation for superhydrophobic surfaces of energy equipment.

The invention belongs to the technical field of molecular breeding, and particularly relates to application of an E1-SOC1 gene model in cultivation of wide-adaptability soybean varieties. Research finds that three genes (E1 and homologous genes E1La and E1Lb) of an E1 family and two genes (SOC1a and SOC1b) of an SOC1 family are knocked out from soybeans at the same time by utilizing a gene editing technology, and the obtained homozygous five mutants show wide adaptability when planted under field conditions of different latitude regions; and the method has certain wide adaptability in the aspects of plant height, section number, flowering period, mature period and yield. It is indicated that the E1-SOC1 gene module (E1, E1La, E1Lb, SOC1a and SOC1b genes) is expected to be applied to molecular design breeding for breeding wide-adaptability soybean models, and has important application prospects in soybean molecular breeding research.

The application discloses a grassland seed rain collecting device, belongs to the technical field of seed rain collecting, and can solve the problems of instability, easy aging and breaking, great influence of extreme weather conditions and terrain, and time-consuming and labor-consuming installation and sampling of the existing grassland seed rain collecting device under field conditions. The device comprises a capturing layer, a plurality of hollow lattices are arranged on the capturing layer, and a capturing structure is arranged on each hollow lattice; each hollow lattice is provided with a pore between the corresponding capturing structure, and the seeds captured by the capturing structure can fall from the capturing layer through the pore; a collecting layer is arranged below the capturing layer, is a water-permeable structure, and is used for collecting the seeds falling from the pore; an isolation layer is arranged below the collecting layer, is used for isolating the contact between the collecting layer and the ground, and is provided with a plurality of water leakage holes, the water leakage holes are used for discharging the water falling on the isolation layer; and a fixer is used for fixing the capturing layer, the collecting layer and the isolation layer on the ground. The application is used for seed rain collecting.

To enable the recommendation of more appropriate work settings compared to conventional methods, depending on the field conditions. [Solution] Based on the setting information entered by the worker and the field condition information, recommended setting information is generated, which is the recommended value for the setting information of the vehicle body (10) and implement (5) when performing work. This makes it possible to recommend more appropriate work settings than in the past, according to the field conditions.

The invention provides an oil reservoir pressure prediction model optimization method and system, and the method comprises the steps: collecting the geological development data of a target oil reservoir, and building a target oil reservoir numerical simulation model; target reservoir pressure field condition evaluation research is carried out, and the pressure field state of a research area before adjustment is determined; based on the pressure field distribution condition of the research area and the screened pressure field characterization parameters, key parameters influencing the pressure field of the research area are determined; analyzing the change rule of the pressure coefficient over time, and obtaining the relationship between the pressure recovery duration and the change of the pressure coefficient under the influence of the radial flow pressure conduction rule; on the basis of pressure field characterization parameter sensitivity analysis, a pressure optimization prediction model is established in combination with production dynamic data and dynamic monitoring data of a research area; and comprehensively considering the well pattern condition and the current development situation of the target area, and applying the pressure field optimization model to determine the injection-production policy of the pressure field of the target area. And comprehensively considering and determining an optimal injection-production adjustment strategy.

The present application relates to a kind of plant protection machine wide spraying boom posture adjusting system and its posture control method, the system includes height adjusting component, horizontal adjusting component, side spraying boom component and hydraulic control system, horizontal adjusting component includes middle spraying boom support, leveling oil cylinder, middle spraying boom, spraying boom posture controller and inclination sensor, the upper portion of middle spraying boom support is hinged with the middle portion of crossbeam, the lower portion is hinged with one end of leveling oil cylinder, the other end of leveling oil cylinder is hinged with the end of crossbeam, middle spraying boom is fixed on middle spraying boom support by pipe clamp, spraying boom posture controller and inclination sensor are respectively arranged in middle spraying boom support or middle spraying boom, and spraying boom posture controller receives the detection information of inclination sensor, and controls hydraulic control system to drive leveling oil cylinder to extend or retract;The horizontal adjusting component of the present application is driven by leveling oil cylinder to carry out angle adjustment to spraying boom support;Face to the ups and downs of field conditions, spraying boom can be adjusted to left and right within a certain angle range, and relative ground level is guaranteed.

The utility model provides a drilling machine on-site monitoring platform device which comprises an arc-shaped arm, clamps used for being clamped on drilling machine supporting legs are fixed to the two ends of the arc-shaped arm respectively, the arc-shaped arm is sleeved with an arc-shaped sleeve capable of sliding in the length direction of the arc-shaped arm, and a mounting base is fixed to the lower end of the arc-shaped sleeve. A transparent dustproof cover is fixed to the bottom of the installation base in a sealed mode, and a monitoring camera is installed in the dustproof cover. According to the drilling machine on-site monitoring platform device, the monitoring camera is arranged in front of the drilling rod of the drilling machine through the arc-shaped arm, the front portion of the drilling rod is not shielded generally, and the drilling process of the drilling rod can be monitored more clearly. And the monitoring camera fixed on the arc-shaped sleeve through the mounting seat can slide along the arc-shaped arm, so that the position of the monitoring camera can be conveniently adjusted by sliding the arc-shaped sleeve according to field conditions, and the optimal monitoring angle can be conveniently found. In addition, the monitoring camera is arranged in the dustproof cover, and the purpose of dust prevention can be achieved while shooting is not affected through the transparent dustproof cover.

In order to effectively apply semiochemical treatment products, a computer-implemented method is provided for generating an application scheme for a semiochemical treatment for controlling a harmful organism on an agricultural field using a mobile treatment device comprising at least one dispenser, the method comprising:a) providing information about an expected presence of the harmful organism for an upcoming period;b) providing, based on the expected presence of the harmful organism, a planned application timing of applying the semiochemical treatment for treating the harmful organism on the agricultural field;c) providing product data relating to a semiochemical product capable of targeting the harmful organism;d) providing, at least one of field data or environmental data at the planned application timing, wherein the field data is indicative of a field condition at the planned application timing and / or the environmental data is indicative of an environmental condition at the planned application timing;e) determining, based on the product data and the at least one of field data or the environmental data at the planned application timing, a minimum concentration of the semiochemical product for affecting a behaviour of the harmful organism;f) determining, based on the minimum concentration of the semiochemical product, a dose rate of the selected semiochemical product to be spread by the at least one dispenser into an atmospheric vapour forming a cloud which envelops crops on the agricultural field; andg) generating the application scheme based on the determined dose rate.

The invention relates to the field of building construction methods, and discloses an air film hoisting construction method capable of avoiding equipment occupation, which comprises the following steps: S1, performing protection treatment on field large equipment; s2, performing structural calculation according to field conditions and large-scale equipment parameters; s3, a steel pipe hanging beam and a distributed hanging point clamp are matched, membrane cable combination units are synchronously lifted according to the preset operation radius, and the membrane cable combination units span the large equipment; s4, the crane is controlled to synchronously descend the membrane cable combination unit, and membrane material falling is completed; and S5, the located membrane material is subjected to inflation debugging. The construction method has the beneficial effects that building forming is completed on the premise that equipment is covered, the existing inherent logic of first disassembly and then construction is replaced, high equipment disassembly and reassembly cost and production halt loss are omitted, the construction period occupied by disassembly is converted into efficient hoisting operation, and the cost and the construction period are greatly optimized.

The application discloses a mixed layer thickness identification method based on a carrier coordinate system, and the identification method comprises the following steps: importing flow field data; uniformly processing the flow field data, and marking fluid domains and non-fluid domains; identifying active flow and passive flow, and respectively tracking characteristic flow lines of the active flow and the passive flow to determine the boundary of a mixed area; establishing a carrier coordinate system, and determining an integral path set of the mixed area; integrating all the integral paths to obtain the mixed layer thickness of each integral path, i.e., to obtain the mixed layer thickness along the flow direction of the mixed area; screening out integral path discrete points with abnormal growth or reduction of the mixed layer thickness before and after the mixed layer thickness, and removing the integral path discrete points; drawing a curve graph of the mixed layer thickness along the flow direction, and completing the identification of the mixed layer thickness. The application is applied to the field of flow field mixing, can meet the calculation requirements of the mixed layer thickness under more general flow field conditions, and provides more accurate data for flow field analysis, mixed supercharging evaluation and other applications.

The application provides a kind of metrological traceability device for hollow axle ultrasonic detection system of rolling stock, and belongs to the technical field of rolling stock ultrasonic detection.The metrological traceability device includes: ultrasonic unit detection device, used for calibrating performance parameters of ultrasonic unit in hollow axle ultrasonic detection system; ultrasonic probe detection device, used for calibrating performance parameters of ultrasonic probe in hollow axle ultrasonic detection system; calibration test block, having a guide hole and at least one reflection structure; the calibration test block cooperates with the ultrasonic probe detection device to complete the calibration of performance parameters of the ultrasonic probe.The application significantly reduces calibration cost and improves equipment utilization, avoids assembly error introduced by disassembly, and stabilizes long-term precision and detection reliability of the detection system, realizes direct migration of laboratory-level metrological capability to field conditions, and ensures that the detection result has reliable metrological traceability and consistency.

This invention provides a handheld method and device for detecting vegetation index of crop leaves, relating to the field of plant phenotyping technology. The method includes: controlling a contact linear array image sensor to scan the leaf of the crop to be tested line by line in the shaded leaf channel to obtain multi-channel reflectance grayscale digital quantities corresponding to each band; sequentially performing radiation baseline drift suppression, fluorescence cross-channel crosstalk compensation, and crosstalk bias correction on the multi-channel reflectance grayscale digital quantities to obtain multi-channel response data; determining the vegetation index of the leaf of the crop to be tested based on the multi-channel response data, and extracting the leaf phenotypic parameters of the leaf of the crop to be tested; determining the growth status of the leaf of the crop to be tested based on the vegetation index and leaf phenotypic parameters. This method can suppress the influence of ambient light interference, fluorescence crosstalk, and multi-band crosstalk on the measurement results, improve the accuracy of the vegetation index and the reliability of the leaf phenotypic parameters, and is beneficial for high-frequency, continuous, single-person handheld operation under field conditions.

The invention discloses a stirring anti-blocking type seeding machine which comprises a rack, a seeding mechanism, a walking mechanism and an adjusting mechanism, the seeding mechanism comprises a seed box, a cover plate, a motor, a transmission belt, a transmission wheel, a poked sheet, a poke rod, a stirring rod, a limiting groove, a butt-joint blanking pipe and a discharge port spring; the walking mechanism comprises a guide rod, a fixing plate, a two-way screw rod, supporting legs, idler wheels and gears. The adjusting mechanism comprises a traction rope, a lifting rack, an ejector rod, a handheld rotating rod, a shaft seat, a vertical rod and a reset spring. The seeder adopts a stirring anti-blocking structure, so that bridging, caking and blocking of seeds can be inhibited, the risk of miss-seeding and seeding interruption is reduced, and the seeding is stable and uniform; the roller spacing and operation parameters can be conveniently adjusted to adapt to different crop row spacing and plot conditions; the whole structure is compact, portable and easy to maintain, the seeding consistency and the operation efficiency are improved, and the manual labor intensity is reduced.

This invention relates to a method for verifying the accuracy of artillery, comprising the following steps: North-pointing calibration of the artillery is performed, and the artillery after north-pointing calibration is taken as the initial state. If automatic gun-adjustment accuracy verification is performed, the azimuth and elevation angles measured by the artillery's inertial navigation system in the initial state are recorded, as well as the azimuth and elevation angles of the artillery barrel's central axis measured by the north-pointing total station in the initial state are recorded. If aiming line offset verification is performed, the azimuth and elevation angles measured by the artillery's inertial navigation system in the initial state, as well as the reading of the gun sight, are recorded. A first marker point and a second marker point are respectively affixed to the breech and muzzle on one side of the artillery barrel. A first total station and a second total station are respectively set up on the rear and front sides of the artillery barrel. This invention can solve problems such as inconsistent north-pointing among various types of equipment, lack of artillery inertial navigation detection methods, low efficiency of traditional aiming system detection methods, and lack of detection methods under field conditions.

The application provides a calculation method of passive earth pressure of a foundation pit rock-socketed support pile. The calculation of the passive earth pressure comprises the following steps: setting an angle between a passive sliding surface and a horizontal plane as θ, dividing the earth pressure calculation model into three cases according to the relative position relationship between the sliding surface and a reserved rock shoulder in the pit, and establishing equations according to the static equilibrium condition on the sliding body by using the limit equilibrium method to obtain the passive earth pressure expression of the three cases; deriving the earth pressure expression with respect to θ, setting the equation as 0 to obtain θ' of different cases, comparing θ' with limit angles θ1 and θ2 of the three cases, selecting a suitable θ value to be substituted into the corresponding passive earth pressure equation, respectively obtaining the passive earth pressure of the three cases, and taking the minimum value as the actual passive earth pressure. The application fully considers the passive earth pressure provided by the reserved rock shoulder in the soil-rock combined foundation pit, so that the calculated passive earth pressure is more in line with the field conditions, and the calculation formula is simple and practical.