55 results about "Pressure sensitivity" patented technology

The invention relates to the technical field of optical fiber sensors, and provides an optical fiber cranium temperature and cranium pressure composite monitoring probe and a preparation method thereof.The optical fiber cranium temperature and cranium pressure composite monitoring probe comprises a pressure diaphragm, a hollow glass tube, a metal coating, a graded-index optical fiber and a single-mode optical fiber, one end of the hollow glass tube is connected with the pressure diaphragm; the metal coating is arranged on one surface, far away from the hollow glass tube, of the pressure diaphragm; the graded-index optical fiber is arranged in the hollow glass tube, and the graded-index optical fiber and the pressure diaphragm are spaced to form an F-P cavity; and one end of the single-mode optical fiber is inserted into the hollow glass tube. The corrugated pressure diaphragm formed by processing the coreless optical fiber is used as a sensitive element, the pressure measurement sensitivity can be greatly improved under the condition of the same diaphragm thickness and diameter, the zero drift of the sensor caused by temperature and moisture is reduced, and meanwhile, the pressure sensitivity can be accurately regulated and controlled so as to adapt to different application scenes such as intracranial pressure, intramental pressure and blood flow pressure.

The invention discloses a ceramic flat membrane double-sheet resistance type pressure core body, which belongs to the technical field of pressure sensing, is a flat membrane double-sheet type structure pressure sensing core body, and comprises a ceramic pressure sensing membrane, a Wheatstone bridge, a sealing layer, a ceramic base and a PIN needle, wherein the Wheatstone bridge comprises a strain resistor and a wire, is arranged on the surface of the ceramic pressure sensing diaphragm and is used for converting deformation of the ceramic pressure sensing diaphragm into a voltage signal; the sealing layer is used for sealing the ceramic pressure sensing diaphragm and the ceramic base into a whole; the PIN needle is arranged at the bottom of the ceramic base, is connected with a lead of the Wheatstone bridge and is used for outputting a voltage signal; moreover, the top of the ceramic base is provided with a deformation pit, and the two sides of the deformation pit are provided with double-lug structures. The resistance-type pressure core body is simple in structure, adopts the design of a flat-film double-piece structure, a double-lug structure, a zero-setting-free resistor and the like, and is beneficial to simplifying the production process, reducing the production and manufacturing cost and improving the anti-explosion performance and the pressure sensing sensitivity at the same time.

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 biosensor includes a periodic crystalline structure first layer, and an amorphous crystalline structure second layer. The first and second layers are formed from a biocompatible silicone having a Young's Modulus E between 0.4 and 2.0 MPa. The biosensor has a pressure dependent NIR resonance peak shift of less than 15 nm over a field of view of 40°, and has an optical pressure sensitivity of between 0.38 and 2.6 nm / mm Hg. The biosensor may be formed by forming a 3D crystalline structure having a periodic amorphous crystalline first layer and an amorphous crystalline second layer. Voids of the 3D crystalline structure are filled with the biocompatible silicone / polydimethylsiloxane a material. The 3D crystalline structure is removed to form an inverse structure having a first volume of an amorphous arrangement of voids and a second volume of a periodic arrangement of voids.

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.

The invention relates to the field of industrial automation control, and discloses an application method and system of an embedded system in a pressure transmitter, and the method comprises the steps: analyzing a working environment corresponding to the pressure transmitter, collecting the current pressure precision information of the pressure transmitter, and setting a working mode sequence of the embedded system in the pressure transmitter; calculating the operation efficiency loss of the embedded system in the data processing process, calculating the signal conduction efficiency loss generated by the embedded system in the transmission process, and determining the composite operation loss of the embedded system in the pressure transmitter; calculating the measurement distortion coefficient of the pressure transmitter, calculating the resource occupation evolution rate of the embedded system, and evaluating the operation steady-state performance of the embedded system in the pressure transmitter; and determining a performance optimization target of the embedded system, and executing application control management of the embedded system in the pressure transmitter to obtain an application result. According to the invention, the application efficiency of the embedded system in the pressure transmitter can be improved.

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 invention provides a compact oil and gas reservoir fracturing fracture sanding concentration design method considering pressure-sensitive damage. The compact oil and gas reservoir fracturing fracture sanding concentration design method comprises the steps that 1, the optimal flow conductivity of a compact oil and gas reservoir fracturing fracture is obtained through optimization with an oil reservoir numerical simulation method; 2, measuring the flow conductivity of the tight oil and gas reservoir support fracture under different conditions, and establishing a relation equation between the flow conductivity of the support fracture and the sanding concentration as well as the effective closing pressure; 3, according to the maximum effective closing pressure formed in the fracturing crack in the compact oil and gas reservoir depressurization production process and the optimal crack flow conductivity obtained through digital-analog optimization, the fracturing crack sanding concentration considering the pressure-sensitive damage is designed with reference to the supporting crack flow conductivity relation equation. According to the compact oil and gas reservoir fracturing crack sanding concentration design method considering the pressure-sensitive damage, a basis can be provided for reasonable sanding concentration design of a compact oil and gas reservoir hydraulic fracturing process, productivity loss caused by crack pressure sensitivity in the pressure reduction production process is avoided, and then a longer stable production period is obtained.

The present invention provides a method and system for adaptively adjusting the pressure sensitivity of touch handwriting, which relates to the field of touch technology. The method includes performing cluster analysis on pressure values ​​based on an initial touch feature set to generate a linear mapping relationship between pressure values ​​and handwriting attributes, wherein the linear mapping relationship includes multiple initial pressure intervals and initial global parameters; using an LSTM network to predict pressure characteristics and pressure trend labels within a predetermined future time based on a real-time touch feature set; dynamically adjusting multiple initial pressure intervals based on the pressure trend labels to obtain real-time pressure intervals; dynamically compensating the initial global parameters according to the pressure characteristics to obtain real-time global parameters; generating a new linear mapping relationship in combination with the real-time pressure intervals and real-time global parameters, and performing real-time adjustment of handwriting attributes. The present invention realizes dynamic adjustment of the mapping relationship between pressure values ​​and handwriting attributes by collecting the user's touch characteristics in real time, using cluster analysis, LSTM network prediction and dynamic compensation.

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 present invention relates to the technical field of pressure-sensitive adhesives, and particularly relates to a pressure-sensitive adhesive composition, a pressure-sensitive adhesive, a preparation method thereof, and a pressure-sensitive adhesive product. The pressure-sensitive adhesive composition of the present invention comprises the following raw materials: a soft monomer, optionally a hard monomer, a functional monomer, a photoinitiator, and a chain transfer agent; the functional monomer comprises a first functional monomer and a second functional monomer, and the first functional monomer and the second functional monomer are different. Different functional monomers are used in the composition of the present invention, which improves the crosslinking density of the colloid, and enables the pressure-sensitive adhesive containing the composition to have good high-temperature resistance, pressure sensitivity, and coating viscosity; the pressure-sensitive adhesive prepared by the preparation method of the present invention has good high-temperature resistance performance. After the tape is baked at 200 °C for 1 h when attached to the chip, the tape does not turn yellow or have bubbles, and there is no residual glue after the tape is peeled off, and it has good pressure sensitivity.

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 application discloses a kind of high sensitivity flexible sensor of quick response and preparation method thereof, belong to sensor preparation technical field, the flexible sensor includes substrate layer and the carbon structure layer and zinc oxide nanowire network structure layer sequentially arranged on pedestal, the both ends of the carbon structure layer are respectively provided with wire, copper band is negative on wire, the flexible sensor utilizes the high length-diameter ratio of zinc oxide nanowire network structure layer, cooperate carbon structure layer, increase the mobility of carrier, to improve the sensitivity and linear characteristic of entire flexible sensor reduce hysteresis, pressure sensitivity is as high as 2.4×10 ‑2 kPa ‑1 , response time is as low as 5ms, solve the problem that the sensitivity of pressure-sensitive sensor in the prior art is low, nonlinear and hysteresis cannot meet the requirement of current production to flexible sensor, show great potential in the application of electronic skin and wearable device.

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 preparation method of a flexible array capacitive pressure sensor based on IPMC, and relates to a flexible sensing technology. The sensor adopts a five-layer symmetrical composite structure and comprises a flexible PI packaging layer, a patterned copper electrode network and a Nafion-PEO nanofiber dielectric layer. A flexible PI base film is prepared through a spin-coating and sintering process, and a snakelike extension electrode is formed by combining a micro-nano mask and a magnetron sputtering technology; the preparation method comprises the following steps: directionally preparing a Nafion-PEO composite nanofiber dielectric membrane by adopting an electrostatic spinning technology, and activating a proton conduction channel through ion exchange; and multi-layer heterostructure integration is realized through vacuum thermocompression bonding. Through topological adaptation of the fiber reinforced composite dielectric layer and the array electrodes, the pressure sensitivity, mechanical flexibility and environmental adaptability of the sensor are improved, the problems that a traditional flexible sensor is low in ion migration efficiency, insufficient in spatial resolution and the like are solved, and the sensor can be widely applied to the fields of intelligent wearing, health monitoring and high-resolution detection of dynamic pressure fields.

The application provides a method for designing sanding concentration of a compact oil and gas reservoir fracturing fracture considering pressure sensitivity damage, comprising the following steps: step 1, obtaining the optimal conductivity of the compact oil and gas reservoir fracturing fracture by using a reservoir numerical simulation method; step 2, determining the conductivity of the compact oil and gas reservoir support fracture under different conditions, and establishing a relationship equation of the support fracture conductivity and sanding concentration and effective closure pressure; step 3, according to the maximum effective closure pressure formed in the fracturing fracture during the pressure reduction production process of the compact oil and gas reservoir and the optimal fracture conductivity obtained by numerical simulation optimization, and referring to the support fracture conductivity relationship equation, the sanding concentration of the fracturing fracture considering pressure sensitivity damage is designed. The method for designing the sanding concentration of the compact oil and gas reservoir fracturing fracture considering pressure sensitivity damage can provide a basis for designing a reasonable sanding concentration for the compact oil and gas reservoir hydraulic fracturing process, avoid the production capacity loss caused by the fracture pressure sensitivity during the pressure reduction production process, and further obtain a longer stable production period.

The invention relates to an insole capable of monitoring plantar pressure in real time, in particular to a high-precision plantar pressure monitoring system based on a fiber grating ring laser structure. The system comprises an insole body integrated with a fiber bragg grating sensor and an annular laser structure composed of a wavelength division multiplexer, an erbium-doped fiber and the like, the central wavelength 3dB bandwidth of the fiber bragg grating sensor is narrowed from 0.23 nm to 0.0175 nm by introducing the laser structure, the pressure measurement precision can be optimized from 2.4% FS to 0.18% FS according to 0.00457 nm / N sensor pressure sensitivity and 2100 N measuring range calculation, and the pressure measurement precision can be optimized from 2.4% FS to 0.18% FS according to 0.00457 nm / N sensor pressure sensitivity and 2100 N measuring range calculation. Dynamic pressure data are acquired and recorded in real time through the sweep frequency demodulator terminal equipment, and precise measurement of tiny changes of plantar pressure is achieved. And the requirements on high precision of the pressure sensor in the fields of sports biomechanical analysis, diabetic foot monitoring, athlete injury rehabilitation detection, scientific research level foot mechanics research and the like can be met.

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 embodiment of the invention provides a pressure-sensitive calibration method of an electronic pen, the electronic pen and a computer program product. According to the embodiment of the invention, whether the electronic pen meets a pressure-sensitive calibration condition or not is determined; acquiring a first pressure value of the pressure monitoring area by using the pressure sensor under the condition that the electronic pen meets the pressure sensing calibration condition; updating an initial pressure value corresponding to the pressure monitoring area according to the first pressure value; acquiring a second pressure value of the pressure monitoring area by using the pressure sensor under the condition that the electronic pen does not meet the pressure sensing calibration condition; calibrating the second pressure value according to the initial pressure value to obtain a calibrated pressure value; and determining a calibration pressure sensing value corresponding to the calibration pressure value, and sending the calibration pressure sensing value to the target electronic equipment, so that the target electronic equipment outputs corresponding handwriting based on the calibration pressure sensing value. According to the embodiment of the invention, the problem of ink leakage of the electronic pen is solved, and the accuracy and reliability of writing and drawing handwriting on the touch screen of the target electronic equipment by the electronic pen are improved.

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.