30 results about "Pressure sensitivity" patented technology

The invention discloses an integrated double-hole friction stress sensor based on pressure gradient detection, and belongs to the field of friction sensors. The sensor adopts flow field surface pressure to detect the magnitude of friction stress, and a friction pressure sensitive module, a pressure detection module and a friction calculation module are integrated in the sensor. When the pressure sensing double-hole structure is subjected to an incoming flow effect, the wall surface has a pressure gradient due to friction resistance, the differential pressure is amplified through the double-hole structure, the differential pressure and the static pressure are detected through the high-precision differential pressure sensitive core body and the high-precision absolute pressure sensitive core body, and then the friction resistance stress is solved. The sensitive core body adopts an integrated packaging scheme, and a double-hole sensitive structure, a pressure cavity, an absolute pressure sensitive core body, a differential pressure sensitive core body and a detection circuit module can be integrally packaged in a single tube shell, so that application under a high static pressure background is realized. The friction resistance stress sensor is excellent in performance, compact in structure, high in robustness and capable of achieving friction resistance stress detection of the hypersonic flight vehicle under the extreme working condition.

A pressure-sensing laminate for a sports practice device according to the present invention comprises, with respect to a pressure-sensing laminate for sports practice device capable of sensing pressure applied by a player to a grip part: a conductive layer having pressure sensitivity; a circuit layer disposed to face the conductive layer and provided with a plurality of conductive patterns; and a separation layer disposed between the conductive layer and the circuit layer and made of a fiber structure comprising a plurality of fibers, wherein, when pressure is applied, the conductive layer and the circuit layer come into contact with each other to sense the pressure.

The application provides a MEMS microphone, comprising a substrate and a MEMS chip, an ASIC chip, a pressure sensing module and a pressure data tuning processing module arranged on the substrate; wherein the pressure sensing module is arranged at the bottom of the MEMS chip. The pressure sensing module is used for sensing the pressure at the bottom of the MEMS chip and outputting a first pressure signal; the ASIC chip is used for converting the pressure signal output by the MEMS chip into a second pressure signal and outputting the second pressure signal to the pressure data tuning processing module; and the pressure data tuning processing module is used for compensating the second pressure signal according to the first pressure signal and outputting the compensated second pressure signal as a target pressure signal. The MEMS microphone can sense the pressure of different use interfaces through the pressure sensing module, compensate the output of the MEMS chip, and thus keep the pressure sensitivity of the MEMS microphone consistent in different use scenarios.

This application provides a multimodal input method and device based on the collaboration of a pressure-sensitive pen and a physical keyboard. The method includes: detecting the sensing signal generated by the electromagnetic pen above the screen of a tablet device and determining the hovering distance value of the electromagnetic pen; when the physical keyboard is connected and the hovering distance value is less than a first distance threshold, determining the initial input mode of the current foreground application; acquiring the pressure value received by the tip of the electromagnetic pen, performing analog-to-digital conversion on the pressure value to generate a pressure-sensitive value, and scanning the level changes of each key on the physical keyboard to generate a key scan code; switching the initial input mode according to the pressure-sensitive value and the key scan code, determining the pressure sensitivity level identifier according to the value range of the pressure-sensitive value, combining the modifier key value in the key scan code with the pressure sensitivity level identifier, and searching for the corresponding compound instruction from a preset shortcut key mapping table for input control. This application can maintain operational continuity and significantly improve input efficiency.

The application discloses a kind of low-permeability reservoir's optimal production prediction method, considering starting pressure gradient and pressure sensitivity effect, including measuring the conventional parameter of reservoir;Carry out low-permeability core starting pressure gradient experiment, obtain starting pressure gradient and the relationship of permeability;Carry out low-permeability core stress sensitivity reservoir damage experiment, obtain the relationship of permeability and pressure difference;Get the production calculation model of low-permeability reservoir considering variable starting pressure gradient and pressure sensitivity effect;Draw the relationship curve of production and bottom hole flowing pressure, obtain the maximum of production.Determine optimal production, constant-pressure production, ensure that oil layer is less sensitive to pressure damage, improve the production of low-permeability reservoir, improve the development effect of low-permeability reservoir.

This invention discloses a method and system for adaptive adjustment of mattress zones based on pressure and posture data. The method involves calibrating the pressure sensitivity coefficients of each zone using physical structure difference parameters, constructing a pressure data correction model, and standardizing the original pressure time-series data. Based on the standardized data, the pressure change gradient is extracted to identify the effective pressure-bearing boundary of the user's body pressure. Combining this boundary with the pressure data, the user's sleeping posture and trunk posture angle are identified. Furthermore, the gravity distribution characteristics under this posture are analyzed, and the morphological deviation between each airbag zone and the target comfort support surface is calculated. Finally, air pressure adjustment commands for the airbag zones are generated based on the morphological deviation, thereby achieving adaptive and precise adjustment of the mattress support shape and effectively improving sleep comfort.

The application discloses a kind of special low permeability sandy conglomerate reservoir well bottom flow pressure level keeping prediction method, including the statistical special low permeability sandy conglomerate body oil reservoir core sample's permeability and pressure sensitivity relationship data;Calculate the ratio of the permeability of rock sample under each level net confining pressure condition and the permeability tested under initial net confining pressure condition;Draw the relationship curve of net confining pressure value and permeability change rate;Predict the permeability loss ratio of reservoir near the bottom of production well with the increase of production pressure difference;Calculate production pressure difference, compare permeability classification data, calculate the permeability reduction ratio in the range of salt well bottom and the influence on fluid production rate.The application is mainly aimed at the production characteristics of the production well of special low permeability sandy conglomerate reservoir, explains the internal cause of its change, and provides development theoretical basis;It has guiding significance for the initial development mode, method and production pressure control of special low permeability sandy conglomerate reservoir.

The application designs a resonant pressure sensor based on C-SOI and a manufacturing method. The C-SOI with high device layer thickness uniformity is manufactured by gold-silicon eutectic bonding and mechanical chemical polishing processes, and the pressure sensitive membrane and resonator aligned with the pre-embedded groove are manufactured by using the bonding wafer through photoetching and deep etching processes, and the silicon wafer and the C-SOI are bonded together by using the gold-silicon eutectic bonding process to realize the vacuum packaging of the resonator. The silicon resonant pressure sensor designed by the application can realize high-precision measurement of gas pressure, and the differential output of the double resonator can greatly improve the pressure sensitivity of the sensor, reduce the temperature drift of the sensor and reduce the static pressure error of the sensor in the measurement process. The cavity thickness of the C-SOI is accurately controlled, the influence of side drilling on the performance of the resonator is eliminated, and the resonator failure caused by the release of hydrogen fluoride is eliminated.

The invention discloses a rock parameter inversion method for pressure-maintaining coring by using ultrasonic waves. The rock parameter inversion method comprises the following steps: S100, aligning a transmitter and a receiver with a through hole in a core barrel; s200, starting to send and receive an ultrasonic signal to obtain the following data: longitudinal wave propagation time; transverse wave propagation time; and S300, calculating the following parameters of the rock, including the longitudinal wave velocity, the transverse wave velocity, the pressure sensitivity coefficient and the longitudinal wave modulus of the pressure maintaining rock core. According to the invention, pressure-maintaining coring is combined with a curved surface probe ultrasonic testing technology, so that more accurate and comprehensive detection of a rock core sample is realized, data closer to an in-situ real condition is obtained, and reliable data support is provided for research in related fields.

The invention discloses a pressure transmitting and receiving mechanism facing an ultrasonic liquid level. The pressure transmitting and receiving mechanism comprises a pressure transmitting mechanism, a pressure bearing mechanism, a probe shell, an atmospheric pressure leading-in mechanism and measured liquid, the pressure transmission mechanism is of a cavity structure, is provided with an elastic sensitive body A in front and an elastic sensitive body B in back, and is connected with the pressure bearing mechanism; a displacement mechanism is arranged in the cavity structure and directly faces the distance measuring ultrasonic probe to read displacement data; the displacement mechanism and the distance measuring ultrasonic probe are submerged in liquid, the liquid is sealed in the cavity structure, and the liquid bears liquid level pressure through the elastic sensitive body A; the displacement mechanism generates corresponding displacement delta D due to the change delta H of the measured liquid level H; the displacement delta D is realized through the combined action of the elastic sensitive body A, the elastic sensitive body B and the pressure-bearing mechanism under the pressure of the liquid level H; the pressure-bearing mechanism has pressure sensitivity and can generate elastic deformation delta X due to pressure, and the delta X and the variation delta H of the liquid level jointly act on the displacement mechanism of the elastic sensitive body A, so that the displacement mechanism generates displacement delta D.

The invention discloses a method for evaluating the structural stability of a lithium iron phosphate electrode based on the pressure effect of a button cell and application of the method, the test method comprises the following steps: assembling samples to be tested into two groups of button cells with different internal pressures, respectively carrying out charge and discharge tests, recording and calculating the specific discharge capacity under 1C multiplying power and the 3.2 V voltage platform proportion, and determining the stability of the lithium iron phosphate electrode structure according to the specific discharge capacity and the 3.2 V voltage platform proportion. And then calculating the absolute values delta 1C and delta r3.2 V of the difference value of the average values of the two groups of button cells, and evaluating the structural stability of the lithium iron phosphate electrode based on the delta 1C and the delta r3.2 V. It is found for the first time that in tests of button cells with different internal pressures and different models, particularly, the significant difference existing in electrical properties under the multiplying power of 1C or above is closely related to the particle morphology (especially the content of large-size framework particles) of the material, the stability of the electrode material when the electrode material is pressed can be reflected, the concept of the'pressure sensitive coefficient 'is put forward and verified, and the potential safety hazard of the button cells is eliminated. The process adaptability of the material in large-scale production is effectively predicted, and a new optimization direction is pointed out for material research and development.

This utility model relates to the field of sensor technology, providing a pressure sensor structure and an electronic pressure pen. The pressure sensor structure includes an elastic body and a flexible circuit board. The elastic body includes an elastic main body and a contact structure for contacting a pressure-applying structure of an external device. The flexible circuit board is located on the side of the elastic main body away from the contact structure and is electrically connected to the main control circuit board of the external device. The pressure sensor structure provided by this application has a simple overall structure. Furthermore, by adding the contact structure, the assembly precision between the elastic main body and the external pressure-applying structure is reduced. The force applied by the pressure-applying structure can be transmitted to the elastic main body more quickly, and the deformation of the elastic main body under force is more pronounced, which also improves the pressure sensitivity accuracy of the pressure sensor structure to a certain extent.

The invention relates to a vehicle door closing lug pressure sensing optimization method and device, and aims to solve the problems that a door closing lug pressure sensing optimization method in the prior art is not optimized from a system level and cannot be universalized. The method comprises the steps that the target door closing speed of a vehicle and the ear-side pressure amplitude target and the pressure drop time target when the vehicle is closed at the target door closing speed are set; determining design parameter initial values and arrangement parameter initial values of key parts of the airflow channel; constructing a fluid pressure simulation model based on the design parameter initial value and the arrangement parameter initial value; performing simulation analysis on the door closing process based on the fluid pressure simulation model to obtain a time pressure curve; on the basis of the time pressure curve, the ear-side pressure amplitude target and the pressure drop time target, whether the vehicle door closing ear pressure sensitivity reaches the standard or not is verified; if the vehicle door closing lug pressure sensitivity does not reach the standard, the design parameters and / or the arrangement parameters are / is adjusted, and model construction and simulation analysis are conducted again till the vehicle door closing lug pressure sensitivity reaches the standard.

The application discloses a sensor arrangement method for a water supply network based on a graph sampling theory, and comprises the following steps: establishing a user node undirected graph, determining a graph Fourier operator of the user node undirected graph; obtaining user node pressure of the water supply pipe network under different leakage conditions, obtaining a pressure sensitivity matrix of the water supply pipe network, and determining useful information in the pressure sensitivity matrix; performing Fourier transform on the useful information by using the graph Fourier operator to obtain a graph Fourier spectrum of each user node under different leakage conditions; screening out a graph Fourier spectrum group which is greater than or equal to a spectrum threshold to form a new spectrum matrix, and screening out a frequency component corresponding to the new spectrum matrix to form a new frequency component matrix; taking the number of spectrums in the new spectrum matrix as the number of sensor nodes to obtain an update signal; constructing a target function according to the update signal; and screening out user nodes which satisfy the target function as sensor nodes one by one until the number of sensor nodes is reached.

The invention discloses a method and device for analyzing the sensitivity of methane gas adsorbed by coal to temperature and pressure, and the device comprises a pressure stabilizing system of a press for applying axial pressure to an adsorption container and keeping the pressure stable, and a precision heating furnace for heating the adsorption container arranged in the precision heating furnace; the gas adsorption earthenware is a cylindrical metal container and is used for loading a coal sample, high-temperature-resistant sealing gaskets are arranged at two ends of the gas adsorption earthenware, and the gas adsorption earthenware is connected to a gas source and a metering system through pipelines; the gas storage tank and the gas metering device are used for storing methane gas and accurately metering the gas volume change in the experiment process; the vacuum system is used for vacuumizing the adsorption tank and the pipeline before an experiment; and the data acquisition system is used for synchronously acquiring and recording temperature, pressure and gas volume data in the adsorption pottery in real time. According to the method, optimization of a coalbed methane exploitation scheme can be guided, when the depressurization desorption effect is poor, the adsorption capacity can be reduced by 30% or above by adopting heat injection (such as 200 DEG C), and the exploitation efficiency is improved.

AQUIFER MONITORING DEVICE. An aquifer monitoring device (10) comprises a first piezometric probe (30a) including a first pressure sensor (11) providing first pressure measurements (P1) in the aquifer, a second piezometric probe (30b) including a second pressure sensor (12) providing second pressure measurements (P2) in the aquifer, the second piezometric probe (30b) being positioned at a determined distance (D) from the first piezometric probe (30a), and a pressure measurement acquisition and processing module (20) coupled to the first and second piezometric probes (30a, 30b) and arranged to calculate differential data (P2-P1) from the first and second pressure measurements taken in a time-synchronous manner, said differential data being characteristic of an aquifer parameter. The first and second pressure sensors (11, 12) are paired.The pairing criteria are such that the first and second pressure sensors are manufactured using a collective manufacturing technology ensuring substantially identical properties, the first and second pressure sensors have identical pressure sensitivity (SP11, SP12) within 10%, and the first and second pressure sensors have identical temperature sensitivity (ST11, ST12) within 10%. See Figure 9 for abbreviations.

The invention discloses a multi-time temperature compensation method, system and equipment for an intracranial pressure sensor, and relates to the technical field of sensors. The method comprises the following steps: controlling a plurality of preset temperature points through an incubator, and determining the plurality of temperature points as a temperature set; in the state of the target temperature point, obtaining a target temperature ADC value according to each temperature ADC value obtained at each preset moment, and obtaining pressure ADC values under a plurality of pressure points corresponding to the target temperature ADC value; performing calculation according to the pressure ADC values under the plurality of pressure points to obtain corresponding zero offset values and pressure sensitivity; obtaining each zero offset value and each pressure sensitivity corresponding to the temperature set; and substituting the temperature set, and each zero offset value and each pressure sensitivity corresponding to the temperature set into a preset fitting model to obtain a final fitting coefficient value, and importing the final fitting coefficient value into a target memory to output a compensation parameter. According to the method and the device, a dynamic scheme that cubic fitting is preferential and quadratic fitting is automatically switched is adopted, so that over-fitting is effectively avoided, and the adaptability of temperature compensation is improved.

The present application relates to the technical field of fuel cell system control, and particularly relates to a kind of fuel cell air path instruction cooperative correction method and system, by real-time acquisition air compressor actual speed and calculate speed variation rate, when the current request of electric pile changes more than preset threshold, according to the speed variation rate generation correction opening, superimposed to the basic back pressure valve opening degree instruction, and after the output execution of saturation limiting, correction opening introduces valve pressure sensitivity coefficient to be normalized, and when unloading, it is positive correction (slowly drag close valve), when loading, it is negative correction (slowly drag open valve), and through the coefficient of different size forms asymmetric protection strategy, also integrates surge margin protection mechanism, according to the distance calculation safety weight weakening close valve correction amount of working point and surge line.This application effectively suppresses transient pressure overshoot with very low computing power cost, protects proton exchange membrane, and prevents surge.

This invention discloses a concrete pad block for measuring the working stress of concrete and its preparation and testing method. Several carbon fiber cement mortar sensors are fabricated, and the sensors are shaped, wired, and waterproofed and insulated. The sensors are numbered; the temperature resistance curve of each sensor is fitted to determine a temperature correction coefficient; the pressure sensitivity curve of each sensor is calibrated to obtain a pressure sensitivity curve fitting formula; and the stress value is calculated based on the given pad block pressure sensitivity fitting formula and temperature correction coefficient. Suggested dimensions, electrode design, and wire connection methods for the carbon fiber cement mortar sensors are designed and provided. Three potential influencing factors on the carbon fiber cement mortar sensors during use are analyzed: external insulation, humidity, and temperature. Insulation and waterproofing methods, as well as temperature correction methods, are provided.

The application relates to the field of controllers, in particular to a metal microporous pressure-sensitive controller, which is structurally composed of a control part, a control panel and a control plate, wherein the control part is installed in the middle of a base, a rotatable adjusting knob is arranged on the surface of the control part, the control part comprises the control panel, the control plate is nested with the control panel, the control panel is gap-fitted with a pressing part of the base, the base further comprises a support for supporting the control plate and the adjusting knob, the improved device is treated by light transmission in a microporous way through the pressing part arranged on the surface of the plate body, the plate body made of metal material has better texture and higher indication, a sensor arranged at the corresponding position of the pressing part is used for pressure-sensitive detection, the touch mode of pressure sensitivity can prevent dust and water, various use scenes are adapted, the sliding column and the limiting clamp are controlled through the bottom plate, so that the limiting column at the bottom of the plate body can be better limited and supported, and the limiting column can be locked.

The invention relates to the technical field of biosensing and health monitoring, in particular to an integrated multi-parameter information acquisition sensor and an information acquisition method, and the information acquisition method comprises the following steps: carrying out noise reduction and baseline correction on an acquired original resistance signal to eliminate environmental noise interference; establishing a resolving model based on the respective temperature-sensitive coefficients and pressure-sensitive coefficients of the first measurement unit and the second measurement unit; coefficient parameters are determined through a calibration experiment, and cross calculation is carried out to obtain the body temperature and indirectly obtain a respiratory rate calculation formula; according to the time sequence characteristics of the piezoresistive variable quantity, the respiratory rate parameter is obtained by combining the calculation formula of the body temperature and the piezoresistive variable quantity, so that the collected body temperature data and the piezoresistive variable quantity can construct and form a resolving model, and the requirement for collecting the body temperature and the respiratory rate at the same time is met; the invention also correspondingly discloses a structure of the integrated multi-parameter information acquisition sensor, and the sensor comprises a flexible substrate and a data acquisition module, so as to meet the requirement of space occupation.

The application relates to a seawater dynamic pressure real-time measurement method and system and relates to the technical field of marine pressure measurement.The application comprises the following steps: improving a measurement probe based on a Michelson interferometer, collecting sample signals under different temperature pressures, analyzing the frequency difference between an interference peak and an absorption peak, combining temperature pressure data, and constructing a data set.The application combines a neural network architecture and physical guidance to establish a Gaussian process regression model as a pressure calculation model, adopts Gaussian process regression of a composite kernel function, trains the model by using the data set, makes the model generate a frequency difference response curve caused only by pressure under the condition of a fixed temperature reference value, combines partial derivative analysis to quantize pressure sensitivity, and ensures the accuracy and reliability of model decoupling results.In actual application, total pressure signals and static pressure signals of a sea area collected by a dynamic pressure measurement probe are subjected to small continuous dynamic pressure identification through the pressure calculation model.

The invention discloses a multi-parameter sensing and intelligent monitoring method and system for a gallium nitride sensor, and relates to the technical field of intelligent sensors, and the method comprises the steps: building a three-dimensional model according to the production parameters of the gallium nitride sensor, carrying out the mesh generation of the three-dimensional model, determining boundary constraint conditions, and calculating a field intensity gradient value; according to the obtained field intensity gradient value, carrying out iterative optimization on the geometrical shape of the electrode and the bias voltage parameter, and determining an optimized electric field distribution scheme; according to the optimized electric field distribution scheme, determining an interference minimization region division scheme; dividing a plurality of sensing units based on an interference minimization region division scheme, calculating pressure sensitivity coefficients and temperature sensitivity coefficients of the sensing units, and performing weighted fusion to obtain a multi-parameter response matrix; according to the multi-parameter response matrix, simulating the influence of the humidity signal on electric field distribution, and obtaining a synchronous detection calibration coefficient matrix; and calibrating the real-time data stream according to the synchronous detection calibration coefficient matrix to obtain a multi-parameter output vector.

The application belongs to the technical field of force stimulation response room temperature phosphor, and more particularly relates to a fused ring aromatic hydrocarbon double coupling molecule and ethylene-vinyl acetate copolymer composite film and a preparation method and application thereof. The fused ring aromatic hydrocarbon double coupling molecule with a specific structure is compounded with ethylene-vinyl acetate copolymer to prepare a composite film which has enhanced room temperature phosphor intensity and prolonged luminescence lifetime with the increase of applied mechanical force under low pressure. The composite film has excellent low pressure sensitivity and can exhibit excellent room temperature phosphor performance under lower pressure, has excellent phosphor intensity and lifetime, and has broad application prospects in the field of pressure sensing and the like.

AQUIFER MONITORING DEVICE. An aquifer monitoring device (10) comprises a first piezometric probe (30a) including a first pressure sensor (11) providing first pressure measurements (P1) in the aquifer, a second piezometric probe (30b) including a second pressure sensor (12) providing second pressure measurements (P2) in the aquifer, the second piezometric probe (30b) being positioned at a determined distance (D) from the first piezometric probe (30a), and a pressure measurement acquisition and processing module (20) coupled to the first and second piezometric probes (30a, 30b) and arranged to calculate differential data (P2-P1) from the first and second pressure measurements taken in a time-synchronous manner, said differential data being characteristic of an aquifer parameter. The first and second pressure sensors (11, 12) are paired.The pairing criteria are such that the first and second pressure sensors are manufactured using a collective manufacturing technology ensuring substantially identical properties, the first and second pressure sensors have identical pressure sensitivity (SP11, SP12) within 10%, and the first and second pressure sensors have identical temperature sensitivity (ST11, ST12) within 10%. See Figure 9 for abbreviations.

The invention relates to a vehicle charging port cleaning system and method, electronic equipment and a storage medium. The system collects first surface pressure values of a plurality of fast-charging pins whose surfaces are integrated with materials satisfying a preset pressure sensitivity condition and second surface pressure values of a plurality of slow-charging pins whose surfaces are integrated with materials satisfying the preset pressure sensitivity condition through a pressure sampling system; when the first surface pressure value and / or the second surface pressure value are / is larger than a preset pressure threshold value, the shielding cover is opened through the battery management system, and the multiple fast-charging contact pins and / or the multiple slow-charging contact pins are cleaned through the first cleaning holes and / or the second cleaning holes by means of the dust suction device. The first surface pressure value and / or the second surface pressure value are / is smaller than or equal to the preset pressure threshold value. Therefore, the technical problems that in the prior art, a charging port foreign matter detection function is not achieved, in the charging process, contact resistance is increased due to foreign matter, faults such as insulation and charging overheating are caused, and large potential safety hazards exist are solved.

This application relates to the technical field of electronic pens and specifically proposes an electronic pen testing device, which includes a frame, a first driving mechanism, a first clamping member, a second clamping member, a second driving mechanism, and a counterweight. The first driving mechanism is connected to the frame and can drive the first clamping member and the second clamping member to move closer or further apart. An electronic pen clamping space is formed between the first touch portion of the first clamping member and the second touch portion of the second clamping member. The second driving mechanism is connected to the frame and can drive the counterweight to move closer or further away from the electronic pen clamping space. This application first uses the first and second touch portions to clamp the electronic pen, which not only fixes the electronic pen but also performs touch detection on the touch area of ​​the pen. In addition, this application also uses the counterweight to press against the fixed end of the electronic pen to perform pressure sensitivity testing. The two testing structures are integrated and set up to obtain two test results simultaneously, resulting in high testing efficiency and reduced costs.

The present invention belongs to the field of sensors, and more precisely discloses a flexible pressure sensor measured via an in-plane (e.g. coplanar) configuration comprising at least one piezoresistive material layer and at least a substrate made of a flexible, compressible and non-electrically conductive polymer. The pressure sensor of the invention presents both high flexibility as well as improved pressure sensitivity, compared to other pressure sensors of the state of the art.

The invention belongs to the technical field of GaN pressure sensors, and particularly relates to a GaN pressure sensor preparation method and device, the GaN pressure sensor comprises a substrate, a source electrode is arranged above the substrate, a drain electrode is arranged above the source electrode, a grid electrode and a channel structure are arranged between the drain electrode and the source electrode, the channel structure comprises a GaN layer and an AlGaN barrier layer, and the GaN layer and the AlGaN barrier layer are arranged on the substrate. The source electrode is composed of a plurality of annular structures, the annular structures are connected through connecting structures, channel structures are arranged on the inner edges and the outer edges of the annular structures, partition plates are arranged between the channel structures, high sensitivity is achieved, the multi-layer GaN / AlGaN channel structures increase the 2DEG density, the multi-annular source electrode enlarges the pressure contact area, and the high sensitivity is achieved. The two synergistically improve the current change rate, and the pressure sensitivity is improved by 3-5 times compared with a traditional single-layer structure. The structure stability is that the partition plates separate adjacent channels to avoid current crosstalk, and the substrate groove and the drain electrode are designed to be closed, so that pressure transmission loss is reduced, and long-term working precision (drift rate is less than or equal to 0.5% / year) is ensured.

The invention relates to the technical field of data processing, in particular to a slope stability monitoring system which evaluates slope stability by collecting a slope displacement time sequence data sequence, a pressure time sequence data sequence and a height value of each monitoring point. The method comprises the following steps: firstly, calculating the initial possibility of a landslide by using a landslide possibility analysis module in combination with the maximum displacement change amplitude and height value of a monitoring point; and then, the adjustment analysis module evaluates a pressure sensitive factor of the slope to the displacement according to the pressure data, and adjusts the possibility of the landslide. And finally, the judgment and early warning module judges the state of the side slope according to the adjusted possibility and decides whether to give out early warning or not. According to the invention, the accuracy of the slope stability early warning result is improved.