39 results about "Potential measurement" patented technology

The invention discloses a high-precision foundation pit support leakage potential measurement system and method, an electrode matrix, an electric field establishment module, a reference electrode, a multi-channel electric signal parallel measurement device and a data processing terminal are arranged in a foundation pit, and the outer side of a non-polarized electrode of the electrode matrix is filled with bentonite slurry; the bentonite slurry can infiltrate the contact part of the non-polarized electrode and a foundation pit soil body so as to change the property of the soil body, so that the contact potential of the electrode matrix and the soil body is controlled, the measurement error is reduced, meanwhile, an ion concentration meter and a temperature sensor are arranged in the non-polarized electrode and the reference electrode of the electrode matrix respectively, and the measurement accuracy is improved. The data processing terminal can correct the potential difference according to the electrode temperature and the ion concentration of the non-polarized electrode and the reference electrode temperature and the reference ion concentration of the reference electrode to calibrate the electrode range caused by the temperature and the ion concentration, so that the real potential difference of the foundation pit is obtained, and the measurement precision is effectively improved. And the accuracy and reliability of a foundation pit leakage detection result are improved.

The invention belongs to the technical field of corrosion electrochemical testing, and particularly relates to a high-strength steel hydrogen diffusion coefficient testing device and method. A main body structure of the device comprises an electrolytic tank, a circulating water interface arranged at the bottom of the electrolytic tank, a platinum electrode and a reference electrode arranged at the upper part of the electrolytic tank, an inner-layer cover plate and an outer-layer cover plate arranged at the top of the electrolytic tank, and a sample arranged between the inner-layer cover plate and the outer-layer cover plate, and the method comprises the steps of mounting, hydrogen charging and measurement. Meanwhile, after electrochemical hydrogen charging is finished, the electrochemical hydrogen charging is combined with a Kelvin scanning probe technology, in-situ SKP potential measurement is synchronously carried out, and the hydrogen diffusion coefficient of the in-situ high-strength steel can be obtained through calculation and analysis on the basis of a measurement result; scientific basis is provided for deep research on hydrogen permeation behaviors of the high-strength steel in the marine environment and selection, use and maintenance of high-strength steel in the maritime work field, and data support is provided for ensuring reliability and safety of the high-strength steel in the service period.

The invention discloses an electrified flexible source load characteristic identification and adjustable potential measurement and calculation method, and particularly relates to the technical field of trunk line potential measurement and calculation, and the method comprises the steps: S1, multi-dimensional dynamic data collection and processing, S2, flexible source load spatial-temporal characteristic dynamic clustering, S3, adjustable potential prediction model construction of a spatial-temporal mechanism, and S4, AC trunk line power grid safety bundle potential verification. S5, dynamic potential visualization scheduling interface development; and S6, method validity verification adaptive optimization. By constructing a multi-dimensional and high-frequency dynamic data acquisition and processing system, data of different types and different scales can be effectively fused and utilized by the model, so that the defect that full utilization of the flexible load in power grid dispatching is limited due to single data source and poor quality in the prior art is overcome, and the flexible load dispatching efficiency is improved. The problems of inaccurate evaluation and poor predictability in the prior art are fundamentally solved.

The invention discloses a detection method of a portable blood potassium tester and the portable blood potassium tester. The method comprises the steps that a communication mechanism is controlled to be selectively communicated with a cleaning liquid containing bottle, a peristaltic pump is controlled to conduct suction, and a first potential measurement value of an electrode detection mechanism is obtained; the communication mechanism is controlled to selectively communicate with the standard liquid containing bottle, the peristaltic pump is controlled to perform suction, and a second potential measurement value of the electrode detection mechanism is obtained; the communication mechanism is controlled to selectively communicate with the sampling bottle, the peristaltic pump is controlled to perform suction, and a third potential measurement value of the electrode detection mechanism is obtained; and determining the concentration of the target potassium ions in the liquid sample to be measured according to the three potential measurement values. According to the method, the detection result can be quickly obtained, the method can be suitable for scenes such as community medical centers and home detection, trace finger tip whole blood of the patient can be obtained during detection, operation is convenient, the patient can conduct self-detection or relatives assist detection, and therefore the medical cost of the patient is effectively reduced, and the convenience and compliance of blood potassium monitoring of the patient are improved.

The invention discloses an ADSS optical cable potential measurement method and device based on a CNN-PINN fusion network, and a medium, and the method comprises the steps: S1, collecting a space electric field vector around an optical cable and environment temperature and humidity parameters, and constructing a three-channel tensor; s2, extracting a high-dimensional feature vector; s3, a PINN physical constraint module is embedded into a Poisson equation, field intensity gradient constraint and dielectric compensation; s4, outputting a three-dimensional space potential distribution field and an electric corrosion risk level; according to the method, CNN and PINN are fused and improved, and the bottleneck of the traditional technology is thoroughly broken through: high-gradient distortion is captured through UNet, key area perception is enhanced through CBAM, and the measurement error is reduced compared with that of a traditional contact sensor through PINN physical constraint; environmental interference is decoupled through three channels, humidity drift is suppressed through dielectric compensation, and reconstruction precision stability in a strong interference environment is guaranteed through frequency domain noise reduction; and the output layer generates three-dimensional potential field distribution, calculates an electric corrosion risk level integrating a space gradient and a time-varying characteristic in real time, and supports a corrosion protection decision.

This invention belongs to the field of seawater pipeline cathodic protection potential measurement technology, and relates to a device and method for measuring the inner wall protection potential of seawater pipelines based on zinc plug anodes. The main structure includes the seawater pipeline under test and the zinc plug anode installed on it, as well as a measurement module connected to both. The measurement module has a built-in trigger, an anode protection circuit, a potential measurement circuit, and a controller. The trigger is connected to the anode protection circuit or the potential measurement circuit through the anode terminal. Under normal operation, the seawater pipeline under test is directly connected to the zinc plug anode, and the zinc plug anode provides cathodic protection for the seawater pipeline under test. When the potential measurement signal is triggered manually or automatically, the measurement module disconnects the electrical connection between the zinc plug anode and the seawater pipeline under test, immediately uses the zinc plug anode as the reference electrode and the seawater pipeline under test as the working electrode, and connects to the potential measurement circuit. After a delay and depolarization, the protection potential value of the seawater pipeline under test is read at a set timing point. After the test is completed, the module is reset.

The application discloses a micro-nano energy device functional layer charge visualization and standardized quantification device and method, wherein a sample table is used for placing a micro-nano energy device functional layer; an active electrostatic probe and an electrostatic potentiometer are connected to realize potential measurement of the micro-nano energy device functional layer; a motion path controller is used for controlling a double-shaft servo motor to drive the active electrostatic probe to move along the surface of the micro-nano energy device functional layer; an oscilloscope is used for recording the measured potential distribution data and the reference signal of the motion path control; and an upper computer is used for extracting effective potential distribution data based on the reference signal, converting the effective potential distribution data into a potential distribution matrix, decoupling the internal relationship between the potential and the charge to obtain a transfer matrix, and obtaining the charge distribution and the charge amount of the micro-nano energy device functional layer through the potential distribution matrix and the transfer matrix. The application can realize characterization of the micro-nano energy device functional layer, such as the friction nanogenerator, the piezoelectric nanogenerator and the like, charge distribution characteristics, transport behavior and the like.

The invention discloses a geotechnical investigation method based on a variable-frequency high-density electrical method and a processing system thereof, and relates to the technical field of geotechnical investigation, and the geotechnical investigation method comprises the following steps: arranging a series of electrodes on the earth surface of a to-be-investigated area to form a high-density electrode array, the layout spacing of the electrode array is dynamically adjusted according to the geological features and the required resolution of a to-be-surveyed area, and the coverage range of current injection and potential measurement is optimized; and current with different frequencies is applied to the underground rock-soil stratum through the electrode array. Through the high-density electrode array, the dynamic adjustment of the distance between the electrodes and the optimization of current injection and measurement, the exploration precision is remarkably improved, the multi-frequency current is adopted to detect rock and soil stratums of different depths, the electrical contrast is enhanced, the geological anomalous body is effectively identified, and high-precision measurement equipment and an advanced data processing algorithm are combined. The high-resolution resistivity image is generated, the accuracy of geological analysis is improved, a scientific basis is provided for engineering design, and the construction risk is reduced.

The invention discloses an ADSS optical cable potential measurement method and device of an improved ViT network based on physical symbol fusion and a medium, and the method comprises the steps: collecting three-dimensional electric field distribution parameters of an ADSS optical cable, synchronously obtaining environment parameters, and constructing a multi-channel space-time tensor based on an environment-electric field coupling factor; inputting the multi-channel space-time tensor into the improved ViT network to generate a hidden space representation vector; a physical symbol fusion layer is introduced on the basis of the improved ViT network, and an improved ViT network based on physical symbol fusion is constructed; a training process is constrained through a neural differential equation gradient stabilization technology, a three-dimensional dynamic potential distribution field phi (x, y, z, t) is output, and an electric corrosion risk level Risk is calculated in real time based on potential gradient space-time characteristics. According to the invention, multi-modal environmental parameters are fused, physical priori knowledge is embedded, the dynamic risk deduction capability is provided, and high-accuracy and high-precision electric field measurement can be completed in a high-humidity environment.

A scanning apparatus for non-destructively locating waterproofing membrane damage in a bridge deck having an uncoated carbon steel rebar mesh, an asphalt overlay and a waterproofing membrane. A frame alignable over a measurement area of the asphalt carries a counter electrode for physical contact with the asphalt around the measurement area, and one or more reference electrodes to measure a rebar overlay potential of the bridge deck at discrete points within the measurement area when a DC power source is connected between the rebar mesh and the counter electrode to apply a counter electrode potential thereto. A controller takes a respective rebar overlay potential measurement at each discrete position, and determines whether a potential difference between any individual one or more of the rebar overlay potential measurements and the counter electrode potential exceeds a predetermined threshold that signifies the presence of waterproofing membrane damage.

The embodiment of the invention provides a protection pressing plate potential measuring method and device with an automatic potential data storage function. The method specifically comprises the following steps: selecting a measuring mode and a measuring range of a potentiometer according to the attribute and the size range of a protection pressing plate potential; measuring the potential to ground of each protection pressing plate according to the pressing plate switching operation steps and the time sequence of the operation order, and automatically storing potential data at at least three different moments in a memory card; and obtaining a pressing plate potential operation result according to historical data and the potential data. According to the potentiometer, redundant functions such as current and resistance measurement are eliminated, only an alternating current and direct current voltage measurement function required by potential measurement of a protection pressing plate is reserved, accidents such as misoperation of a relay protection device and false tripping of a power switch caused by gear mistaken selection or improper conversion are avoided from hardware design, the operation risk is greatly reduced, and the operation efficiency is improved. And a safer guarantee is provided for the switching operation of the secondary equipment of the transformer substation.

The invention provides a pipeline cathode protection potential measurement system and method based on a Beidou satellite, relates to the technical field of pipeline external detection, and aims to solve the technical problems that the time synchronization delay of a data collector and a current interrupter is high and the positioning precision of a detection point is insufficient. Collecting a cathode protection potential signal of the pipeline; the auxiliary probe stick is matched with the main probe stick to form a soil potential difference measurement loop; the data collector is used for collecting cathode protection potential data of the pipeline, and providing synchronous time service and obtaining position information of a detection point by means of the Beidou module; the synchronous current interrupter is used for controlling the on-off of the cathode protection current of the pipeline and is synchronized with the data collector through the Beidou module; the winder is used for connecting the data collector and the pipeline and obtaining the detection distance between the data collector and the pipeline. According to the invention, the synchronous time delay of the data collector and the synchronous current interrupter can be reduced, and the positioning precision of a detection point is improved.

The present application belongs to the field of deep space exploration and geophysical exploration, and particularly relates to a method and device for detecting lunar low-frequency electromagnetic field, aiming at solving the problem of unstable potential measurement in the lunar surface rare plasma environment. The present application comprises: deploying first, second and third electric field sensor probes in an orthogonal configuration on the lunar surface; applying a controllable bias current to each probe to actively adjust and stabilize the particle exchange process between the probe and the surrounding plasma, so that it works at a stable working point which is not sensitive to environmental disturbance, thereby reliably obtaining the accurate potential at the position of each probe; finally, by calculating the potential difference between the first probe and the second probe, and between the first probe and the third probe, the first and second electric field components which are orthogonal to each other are determined respectively. The present application overcomes the interference of the special lunar surface environment on potential measurement, and realizes stable and reliable detection of the lunar low-frequency electric field.

The invention discloses a natural potential difference measurement integral inversion method, device and equipment and a medium, and relates to the technical field of oilfield development logging, and the method comprises the steps: obtaining a fixed electrode distance potential difference measurement curve of a to-be-logged well changing with the depth of a borehole; integrating the fixed electrode distance potential difference measurement curve to obtain a natural potential measurement curve, and folding each natural potential value in the natural potential measurement curve according to a preset period to obtain a periodic analysis chart; performing data remainder taking, data deletion and correction curve drawing on the periodic analysis chart to obtain a correction curve, and correcting the two-dimensional array storing each natural potential value in the periodic analysis chart by using the correction curve; and generating a continuous natural potential curve based on the corrected two-dimensional array, and taking the continuous natural potential curve as a natural potential difference measurement integral inversion result of the to-be-logged well, thereby realizing natural potential difference measurement integral inversion of the to-be-logged well even if the to-be-logged well does not contain a stable stratum, and improving the accuracy of the natural potential difference measurement integral inversion.

The embodiment of the invention provides a potential detection device which can solve the technical problem that the potential measurement error of a pipeline is large. The potential detection device comprises a reference connection wire, a potential measurement module, a pipeline connection wire, a polarization switch, a timer and a test piece connection wire, the reference connecting wire is connected with a to-be-detected pipeline; the potential measuring module is electrically connected with the reference connecting wire; one end of the pipeline wiring is connected with a to-be-detected pipeline; one end of the polarization switch is electrically connected with the potential measurement module, and the other end is electrically connected with the other end of the pipeline wiring; the timer is used for setting on-off time, one end of the timer is connected with the pipeline wiring, the other end of the timer is connected with the potential measurement module, and the timer is connected with the polarization switch in parallel; the test piece wiring is connected with a to-be-tested pipeline through the polarization switch. And through a polarization mode, the measurement accuracy is improved. The potential detection device is simple in structure, light in weight, low in cost, affordable, suitable for various environments, beneficial to popularization of stations and capable of solving the problem of power-off potential testing of various positions, and parts are convenient to disassemble and assemble.

The utility model relates to the technical field of soil water potential measurement, and discloses a device for continuously and automatically measuring soil water potential on site, which comprises a water potential detection head, and a supporting seat is arranged on the outer side of the water potential detection head. According to the device for continuously and automatically measuring the soil water potential on site, the horizontal bubble disc and the supporting mechanism are arranged, so that when the device is used for automatically measuring the soil water potential, a worker can monitor the horizontal bubble disc, the placing levelness of the device and the universal foot margin, and the water potential of the soil can be continuously and automatically measured. The placing levelness of the device is properly adjusted, so that the perpendicularity of the water potential detection head in the process of probing into soil is guaranteed, a worker can analyze the water potential of soil at different depths, errors caused by the fact that the expected insertion depth is not consistent with the actual insertion depth due to inclination in the probing process of the water potential detection head are avoided, and the accuracy of the water potential detection head is improved. And the measurement precision of the device is improved.

The invention discloses a method for measuring a crack growth rate and a threshold value at an extremely high temperature. Firstly, a test sample and a clamp are manufactured; then a high-temperature furnace is installed, a test sample and a thermocouple are installed, the test sample, a reference sample and a potential measurement system are connected through a high-temperature-resistant wire, and the reference sample is arranged outside the high-temperature furnace; the temperature of the high-temperature furnace is raised to 1000-1200 DEG C, heat preservation is conducted, and meanwhile water cooling is conducted to the cooling connecting rod; the low-cycle fatigue testing machine starts to load and test the crack of the sample through a potential measurement system; a K-drop method is adopted for testing, a potential measurement system monitors crack propagation in real time through a direct-current potential method, the test is ended when the crack propagation rate reaches 1 * 10 <-mm > / cycle, and a fatigue crack propagation threshold value is obtained through data processing. According to the invention, the problems of current conduction stability, load transmission accuracy and crack length measurement accuracy in the environment of 1000-1200 DEG C are solved.

The utility model provides a floating type offshore wind power foundation corrosion potential monitoring device, which belongs to the technical field of offshore wind power, and comprises a buoy, a floating frame fixed at the top end of the buoy, a lifting structure fixed at the top end of one side of the floating frame, and a potential measuring instrument arranged in a waterproof protective shell, one side of the waterproof protection shell is rotationally connected with a sealing door, and the protection structure comprises a rotating seat rotationally connected to the bottom end of the mounting plate, a rotating ring fixed to the outer side of the rotating seat and isolation assemblies arranged at the two ends of the rotating ring. According to the utility model, foreign matters are not easy to contact with the measuring electrode through the steel wire mesh, and seawater is prevented from directly impacting the measuring electrode, so that the isolation protection function of the device is realized, the impact of water flow on the measuring electrode is reduced, the potential measurement is more accurate, and various objects are prevented from being attached to the surface of the measuring electrode; the service life of the measuring electrode is prolonged while the measuring accuracy of the measuring electrode is guaranteed.

The application discloses a kind of city micro-update-oriented abnormal zero landscape potential measurement method, it is related to the technical field of city micro-update evaluation.The present application comprises: obtaining multi-source spatial data and preprocessing;Adopting remote sensing-street view collaborative identification method identifies city abnormal zero object;Establish a standardized attribute library;Build the landscape potential index system containing four dimensions of spatial form availability, greening promotion potential, function service supplement potential and governance implementation constraint;Determine the index weight using entropy weight method, build city abnormal zero landscape potential index model for comprehensive measurement, combined with TOPSIS method for priority ranking;Adopting geographic detector identifies leading influence factor;According to the potential grade matching different micro-update strategies and output.The present application realizes the complete technical closed loop from automatic identification to update strategy output of city abnormal zero, and can be embedded in city update auxiliary decision platform.

The invention provides a method for measuring longitudinal resistance of a subway steel rail by using a steel rail potential measuring device, which comprises the following steps that: potential values of steel rails with time marks of a plurality of traction stations distributed along the steel rail to ground are synchronously obtained, the traction stations at least comprise two power supply stations and two non-power supply stations, and the power supply stations and the non-power supply stations are alternately arranged; identifying the interval of the train based on the potential gradient change; calculating the longitudinal resistance of the steel rail according to the ratio of the potential difference to the distance of the adjacent measuring points in a train-free operation interval; and dynamically updating the resistance reference value of each interval, and triggering an alarm when the deviation between the newly measured resistance value and the reference value exceeds a set threshold value. The method has the beneficial effects that the existing steel rail potential limiting device is reused to realize automatic measurement, additional equipment investment is avoided, and the manual intervention cost is reduced; through collaborative analysis of the potential gradients of the four stations, the train position is accurately positioned, a non-interference interval is isolated, the longitudinal resistance measurement precision is remarkably improved, and a reliable basis is provided for potential lifting control.

The invention relates to the technical field of mucous membrane potential measurement, and discloses a human body rectum mucous membrane potential measuring instrument which comprises a detection electrode and a high input impedance electrometer and further comprises a reference electrode, the rear end of the reference electrode is connected with the low input end of the high input impedance electrometer through a wire, and the front end of the reference electrode penetrates into perianal subcutaneous skin. The reference electrode injects sterile normal saline to eliminate polarization potential so as to obtain stable reference potential; the rear end of the exploring electrode is connected to the high input end of the high input impedance electrometer through a wire, and the front end of the exploring electrode is led into the rectum from the anus through the sigmoid colonoscope to make contact with the rectum mucosa so as to obtain measuring potential. The reference electrode comprises a reference silver wire, an injector and a hollow needle head detachably installed at the front end of the injector, and the hollow needle head comprises a needle tip, a needle stem and a pintle. According to the invention, the measurement accuracy of the human body rectum mucous membrane potential can be effectively improved, so that reliable and accurate data support is provided for diagnosis and treatment of related diseases of rectum.

The invention provides a Kelvin probe force microscope-based potential measurement method and a related device. A laser output light path of a laser and an original illumination light path of an AFM main body are physically coaxial through a switching interface of a light path coupling assembly; a collimating mirror is additionally arranged at the tail end of an AFM illumination light path to ensure that laser is collimated light and covers a probe-sample contact area, then a photosensitive material sample is fixed to a sample table after being cleaned and dried, then a laser excitation module and a KPFM control unit are started, laser parameters are adjusted in real time, surface potential data are synchronously collected, and the surface potential data are obtained. And generating a time-potential curve or a space potential distribution diagram. Accurate focusing of laser beams, precise in-situ detection of a sample microcell and standardized parameter regulation and control can be realized through optical path physical coaxiality and the collimating mirror, and the problems that a traditional KPFM can only measure the dark-state surface potential of a photosensitive material and no in-situ measurement professional equipment is provided for the photo-generated surface potential under laser irradiation are solved. And meanwhile, the problem of difficulty in externally introducing a light source is solved.

The invention provides an electrochemical nondestructive testing device for corrosion of a reinforced concrete structure and a state recognition method, and belongs to the technical field of civil engineering. The device comprises an indirect impedance measuring instrument and an external four-electrode array sensor, wherein the external four-electrode array sensor is connected with the indirect impedance measuring instrument through an electrode lead; wherein the indirect impedance measuring instrument comprises an indirect impedance measuring module, a main control module, a relay module, a communication module, a voltage stabilizing circuit and a direct current power supply; the external four-electrode array sensor comprises an RE1 potential measuring electrode, a CE1 current injection electrode, a CE2 current injection electrode and an RE2 potential measuring electrode. The problem that drilling or sensor pre-embedding is needed in traditional electrochemical detection is avoided, and the defects that in a traditional method, the detection efficiency is low, the area is limited, and a sensor cannot be moved and replaced are overcome; the state identification method provided by the invention has the same accuracy for identifying the corrosion state of the reinforced concrete test piece as that of an embedded sensor.

The invention discloses a metering error prediction method and device for an electric energy metering device and a storage medium, relates to the technical field of smart power grids, and mainly aims to improve the prediction efficiency and prediction precision of metering errors of the electric energy metering device. The method comprises the following steps: acquiring a plurality of potential metering error influence factors of a target electric energy metering device; screening an actual metering error influence factor which influences the metering error of the target electric energy metering device from each potential metering error influence factor; and determining real-time factor data of the target electric energy metering device under the actual metering error influence factor, and inputting the real-time factor data into a preset metering error prediction model for error prediction to obtain a real-time metering error of the target electric energy metering device. The method is suitable for prediction scenes of metering errors of the electric energy metering device.

The invention belongs to the technical field of geodetic survey and geophysical exploration, and discloses a real-time gravitational potential measurement method and device combining an unmanned aerial vehicle and Beidou, and the method comprises the steps: 1, carrying out the system calibration; before execution of a flight task is started, the unmanned aerial vehicle is parked at a ground calibration reference point with a known gravity position for static observation; step 2, real-time Beidou data acquisition; the unmanned aerial vehicle flies according to a preset route, and each track point is observed for a certain time; step 3, real-time receiver clock error calculation; establishing an observation equation on the current track point, and calculating the three-dimensional coordinate of the current track point and the clock error of the GNSS receiver; 4, resolving the gravity potential; calculating an absolute gravitational potential value of any point on the flight path of the unmanned aerial vehicle by combining the receiver clock error obtained during flight calibration of the unmanned aerial vehicle in the step 1; and step 5, data output and mapping. High-precision gravity potential measurement is completed on the mobile platform, and the limitation that traditional gravity measurement depends on static observation or ground arrangement is broken through.

The invention discloses a soil carbon sink measuring and calculating method and system, and belongs to the technical field of soil carbon sink measuring and calculating. The soil carbon sink measuring and calculating method comprises the following steps: S1, collecting a soil sample in a pre-defined area, and obtaining basic information of environmental factors and land utilization types; s2, historical soil data are collected, the current situation of soil is measured, and a reference data set is established; s3, on the basis of the reference data set, main control factors of regional organic matter content changes and contribution rates of the main control factors are obtained through statistical analysis; s4, calculating a soil carbon evolution rate by using long-term positioning test data, and simulating carbon sequestration increment potentials under different carbon sequestration measure scenarios; and S5, carrying out spatial expansion and soil carbon sequestration potential measurement and calculation by virtue of a remote sensing technology and a geographic information system analysis method. Through systematic soil sampling, surface layer and profile soil samples are collected, the soil organic carbon content and related environment information are also obtained, and the richness and representativeness of data are improved.

The present application belongs to the field of geodetic survey and geophysical exploration, and discloses a real-time gravity potential measurement method and device combining unmanned aerial vehicle and Beidou, which comprises the following steps: step 1: system calibration; before the start of flight task execution, the unmanned aerial vehicle is parked on a ground calibration reference point with known gravity potential for static observation; step 2: real-time Beidou data acquisition; the unmanned aerial vehicle flies according to a preset route, and each trajectory point is observed for a certain time; step 3: real-time receiver clock error solving; an observation equation based on the current trajectory point is established to solve the three-dimensional coordinates and GNSS receiver clock error of the current trajectory point; step 4: gravity potential solving; the absolute gravity potential value of any point on the flight trajectory of the unmanned aerial vehicle is solved in combination with the receiver clock error obtained during the flight calibration of the unmanned aerial vehicle in step 1; and step 5: data output and mapping. The present application completes high-precision gravity potential measurement on a mobile platform, and breaks through the limitation of traditional gravity measurement relying on static observation or ground layout.

The invention provides a natural ecosystem index measurement method and system based on function and benefit analysis, and relates to the technical field of natural ecosystem index measurement. According to the method, basic units are divided according to function types of forest, grassland, wetland and desert ecological systems, index threshold intervals of ecological, production and life functions are calculated respectively, equivalent discounting is performed through function conversion coefficients, and an index potential measurement result is output. According to the method, multifunctional coordination measurement is realized, and the defects of one-sided index setting and lack of systematicness and resource constraint connection in the existing method are overcome.

The invention discloses a flame plasma potential distribution measurement system under a simulated mountain fire condition. The system comprises a pre-experiment device, a flame plasma potential distribution measurement device and a flame plasma potential distribution measurement device, wherein the pre-experiment device comprises a scale, a combustion platform, a test power supply and a simulated wire; the potential measuring device comprises a plurality of potential measuring units; the pre-experiment device is used for igniting combustible materials on a combustion platform, and when the combustible materials on the combustion platform generate stable flames, the height of a flame continuous area, the height of a flame discontinuous area and the height of a smoke area are obtained through a ruler; the test power supply is used for increasing the voltage until the simulation wire is punctured and reading the breakdown voltage when the simulation wire is punctured; and the potential measuring device is used for respectively placing a plurality of potential measuring units at the flame continuous area height, the flame discontinuous area height and the smoke area height after the flames generated by the combustibles on the combustion platform are extinguished, and respectively measuring the average potential gradient of each area according to the plurality of potential measuring units. By implementing the method, the operation safety of the power transmission line under the mountain fire condition can be improved.