178results about "Material capacitance" patented technology

The application provides a kind of grain moisture content detection method, device, combine harvester, equipment and medium, the method comprises: collecting the temperature of the environment where grain is located, the relative dielectric constant and bulk weight of grain in a preset period;Based on temperature, relative dielectric constant and bulk weight, train through grain moisture content detection model, obtain the moisture content of grain in a preset period;Through the grain moisture content detection model, periodically detect the moisture content of grain.The grain moisture content detection method provided by the application uses a nonlinear method of multiple influencing factors to regress and predict data, by considering multiple influencing factors, the fitting regression accuracy of the grain moisture content detection model is improved, and the moisture content of grain is periodically detected through the grain moisture content detection model, the moisture content of grain is stably detected for a long time, and the reliability is high, so as to improve the accuracy of grain moisture content detection as a whole.

Method for electronically indicating a concentration of an irrigation solution in a root canal (RC) of a tooth (T), using a device able to be electrically connected to an endodontic instrument engaged in the canal and to a labial electrode, and including a screen to display the progression of the instrument in said canal relatively to a critical apical point of reference such as the cemento-dentinal junction (CDJ), said device being furthermore able to measure, in the vicinity of said point of reference, by conductimetry, a concentration of an electrolyte irrigation solution injected into the root canal.

Environmentally sensitive plant ID tags are disclosed herein. An example environmentally sensitive tag for use in a plant growing medium, includes; a substrate including a tag insertion end which is narrowed, pointed, or rounded; an indicator located on or in the substrate, the indicator having an initial state and at least one activated state, the indicator configured to transition from the initial state to the at least one activated state in response to exposure to moisture producing an observable change; and a wicking material disposed longitudinally along or in the substrate, from an area of the substrate proximate the tag insertion end to the indicator and configured to conduct moisture from the growing medium to the indicator when the tag insertion end is inserted in the plant growing medium.

This invention discloses a multi-physics in-situ testing platform for aramid-synthetic ester composite insulating materials. The method includes: pre-treating an aramid substrate by drying and impregnation to obtain a composite sample; clamping the sample between test electrodes; applying a stable and controllable temperature field and an electric field to the sample sequentially or simultaneously; and measuring the dielectric constant, dielectric loss factor, and conductivity of the sample in situ under stable thermo-electric coupling conditions. The testing platform includes test electrodes for clamping the sample, a temperature control module for applying the temperature field, an electric field loading module for applying and adjusting the electric field, and a data acquisition module for in-situ data collection. By optimizing the sample pre-treatment process and the synchronous loading control of multi-physics fields, this invention achieves high-precision and highly repeatable in-situ testing of the dielectric properties of materials under actual service conditions within a wide temperature and field strength range. It is particularly suitable for evaluating the performance evolution of composite insulating materials under thermo-electric coupling.

This invention discloses a sensor for detecting ice, water, and dryness states, comprising a substrate, a first metal line, a second metal line, a third metal line disposed on the surface of the substrate, a variable capacitor, an interdigitated capacitor, and a planar inductor. One end of the variable capacitor is connected to one end of the planar inductor via the first metal line, and the other end of the planar inductor is connected to one end of the interdigitated capacitor via the second metal line. The other end of the interdigitated capacitor is connected to the other end of the variable capacitor via the third metal line. The capacitance value of the interdigitated capacitor changes with the different dielectric constants of the materials between the interdigitated fingers. Since the relative dielectric constants of ice, water, and dryness change at different frequencies, the capacitance value of the interdigitated capacitor also changes. Therefore, this sensor for detecting ice, water, and dryness states has advantages such as simple structure, high recognition rate, small size, and process compatibility.

The application discloses a detection method and system for coating uniformity of a laminator adhesive, and belongs to the technical field of coating equipment control. The method comprises the following steps: synchronously collecting a first detection signal of a wet adhesive layer on a substrate between a coating unit and a drying unit and a second detection signal of an adhesive layer in a composite film on the substrate after a laminating unit; based on the running speed of the substrate and the arrangement positions of a capacitive sensor array and a microwave resonance sensor, the positions of the substrate reflected by the first detection signal and the second detection signal are time-space aligned; according to the aligned second detection signal, the dry adhesive reference quantity of a target section is calculated; according to the dry adhesive reference quantity, the aligned first detection signal is dynamically compensated and calibrated; according to the calibrated first detection signal, the two-dimensional distribution information of the adhesive layer of the target section is calculated, and the uniformity defects of the coated adhesive layer are further identified. Through the above scheme, the online detection of coating uniformity is achieved comprehensively, stably and accurately.

This invention relates to the field of nondestructive testing imaging technology, specifically to a tomographic imaging simulation calculation method for potential continuity constraints in coaxial heterostructures. The method includes: constructing a refined model of the coaxial heterostructure; determining the dielectric constant and conductivity of each layer of material; dividing the material into finite element meshes; identifying the interfaces between heterostructure materials and applying potential continuity and flux balance constraints; solving for the potential values ​​of all nodes; extracting the electric field intensity at the centroid of each element and constructing a sensitivity matrix; combining measured capacitance data; obtaining the dielectric constant vector through an inverse problem; mapping it back to the mesh elements to complete image reconstruction and display the defect location. This invention significantly improves the accuracy of electric field simulation and the resolution of defect image reconstruction by constructing a refined model of the coaxial heterostructure and applying potential continuity constraints.

This invention relates to an RFID humidity sensor, comprising a substrate, a first tag antenna, a radio frequency identification chip, a coupled tag antenna coupled to the first tag antenna and disposed on the upper surface of the substrate, a moisture-sensitive polymer, and a metal ground. The invention also relates to a relative humidity detection method based on the RFID humidity sensor, comprising placing the RFID humidity sensor in the environment to be measured; a reader emitting a radio frequency signal of a preset power, the coupled tag antenna receiving the radio frequency signal, and, based on the linear relationship between the dielectric constant of the moisture-sensitive polymer and the ambient humidity, changing the power of the radio frequency signal and transmitting it to the first tag antenna so that it returns to the reader; the reader acquiring a first reflected power; acquiring a second reflected power after the change in ambient humidity, obtaining the change in amplitude between the first reflected power and the second reflected power; and comparing with a pre-acquired linear relationship table between the change in reflected power amplitude and the change in ambient humidity to obtain the current ambient humidity.

The application belongs to the technical field of capacitive sensing detection, and discloses a metal structure contact detection device and method based on capacitive sensing. The device comprises an elongated sensing electrode and an insulating sheath wrapping the electrode, the sheath forms an exposed sensing area only at one main surface and is configured to be mounted on the metal structure. The application effectively suppresses the motion interference of the metal component and the liquid bridging interference through the geometric constraint design of double isolation protection, significantly improves the reliability and accuracy of the human contact signal detection in the metal structure environment, and has the advantages of simple structure, low cost, easy installation and maintenance.

The present invention relates to a measuring device for bio-diffused substances, the measuring device comprising a measuring chamber, a sensor, and an evaluation device, wherein the measuring chamber has at least one top opening for discharge and a bottom opening for direct or indirect contact with a living body, the area of ​​the top opening being smaller than that of the bottom opening, the measuring chamber further comprising at least one third opening for forming a bottom-open structure in the measuring chamber during measurement, the sensor located in the peripheral wall of the measuring chamber and used to measure the concentration of a substance diffused from a living body, and the evaluation device being coupled to the sensor.

The application provides a kind of simulated human tissue fluid and its preparation method and application, it relates to wireless communication technical field, the simulated human tissue fluid includes: water, 55wt%~75wt% by mass percentage;Ionic inorganic salt, 2wt%~5wt%;Albumin, 10wt%~18wt%;Lipid, 12wt%~20wt%;Non-ionic surfactant, 2wt%~4wt%;Preservative, 0.2wt%~1wt%.Therefore, by water, ionic inorganic salt, albumin, lipid, non-ionic surfactant and preservative cooperate to simulate the skin of human body, so as to be able to carry out APD test in the frequency range of 10GHz~30GHz, and the stability of simulated skin tissue fluid is good, and the cost is lower.

This application discloses a sensor assembly, including an insulating substrate comprising a first surface and a second surface disposed opposite to each other; a surface acoustic wave (SAW) pressure sensor disposed on the first surface, the SAW pressure sensor comprising a piezoelectric lithium niobate layer and two pairs of interdigital transducers disposed on the surface of the piezoelectric lithium niobate layer, the piezoelectric lithium niobate layer having a cavity and a corresponding thinned sensitive membrane region, the two pairs of interdigital transducers being disposed around the thinned sensitive membrane region in mutually perpendicular directions; and a platinum resistance temperature sensor and an interdigital capacitance humidity sensor disposed on the second surface. By having the SAW pressure sensor, platinum resistance temperature sensor, and interdigital capacitance humidity sensor disposed opposite to each other on the insulating substrate, combined with the cavity formed on the piezoelectric lithium niobate layer, and the two pairs of interdigital transducers disposed in mutually perpendicular directions, the detection accuracy is improved and crosstalk is reduced.

The present invention relates to the electrochemical detection of an analyte by capacitance spectroscopy using a redox active polymer-coated electrode such as a polyaniline-coated electrode.

The present disclosure describes a moisture sensor system. The system includes a dielectric layer, a first metal plate, and a second metal plate. The dielectric layer includes a moisture absorbing material. The first metal plate is positioned on the dielectric layer. The second metal plate is positioned in the dielectric layer such that a first portion of the dielectric layer is positioned between the first metal plate and the second metal plate and such that the dielectric layer, the first metal plate, and the second metal plate form a capacitor. A capacitance of the capacitor changes when the moisture absorbing material absorbs a fluid.

To provide a sensor and capacitor device capable of improving characteristics.SOLUTION: A sensor comprises a base and an element section. The element section includes a fixed electrode, a first support structure, and a movable member. The fixed electrode is fixed to the base. The first support structure includes a first fixed member fixed to the base, a first intermediate member supported by the first fixed member, a first connecting member supported by the first intermediate member, a first cross fixed member fixed to the base, a first cross intermediate member supported by the first cross fixed member, and a first cross connecting member supported by the first cross intermediate member. The first connecting member includes a first connecting portion, a first support connecting portion, and a first intermediate connecting portion between the first connecting portion and the first support connecting portion. The first support member is fixed to the base and supports the first intermediate connecting portion. The movable member includes a first movable portion. The first movable portion is supported by the first support connecting portion and the first cross connecting member.SELECTED DRAWING: Figure 1

The application discloses a kind of support space-time-surface sensing fusion's farmland water dynamic monitoring method and system, it is related to water farmland state monitoring technical field, comprising: obtaining the farmland water in-situ data collected by ground anchor point monitoring layer;Based on farmland water in-situ data, trigger low-altitude patrol layer to execute dynamic patrol task, to obtain low-altitude hyperspectral image;Based on low-altitude hyperspectral image and farmland water in-situ data, generate low-altitude water distribution data, and with low-altitude water distribution data as constraint boundary, to the satellite remote sensing image obtained executes adaptive partition interpretation, to generate high-altitude water distribution data;Low-altitude water distribution data and high-altitude water distribution data are executed data merging, generate the farmland water dynamic distribution field with space-time-surface consistency expression.The spatial position adjustment is carried out to high-altitude water distribution data again and then weighted fusion is carried out, so that the farmland water dynamic distribution field finally generated realizes seamless connection of multilayer observation data.

The application belongs to the technical field of oil detection, and particularly relates to a spinning oil online detection system based on edge computing, which comprises the following steps: obtaining spinning oil frequency shift and energy loss data, fitting to obtain oil film adsorption capacity, viscoelasticity and shear loss modulus, combining microfluidic pressure signal to calculate fluid shear force, constructing a friction energy loss database and normalizing to form a feature vector, fusing with dielectric constant and ion mobility data, extracting interface conductance and molecular motion parameters, establishing a lubrication and charge conduction coupling model, converting the model into a spatial charge density matrix, matching the matrix with time domain data of the yarn tension transient state, calculating a correlation coefficient and generating an antistatic and smoothness coupling evaluation index, fitting a prediction model through multi-temperature and humidity, and outputting a quantitative conclusion to guide the formula and process. Through multi-sensing fusion and edge computing, the application realizes full-dimensional detection and optimization of oil performance, and improves detection precision and production efficiency.

The application relates to the field of microelectronic devices and intelligent sensing technology, and discloses a neuromorphic gas sensor based on ionic gel and a memristor and a preparation method. The sensor comprises a substrate, a Mott memristor integrated on the substrate, and an ionic gel capacitor type gas sensing unit, the Mott memristor and the ionic gel capacitor type gas sensing unit are connected to form an oscillation loop through on-chip heterogeneous integration and electrical interconnection. The adsorption response characteristics of the gas molecule to the double electric layer capacitor of the ionic gel are utilized to modulate the charging and discharging period of the Mott memristor, so that the gas concentration information is converted into the frequency of the output pulse signal. The integration function of gas "perception-coding" is realized, the sensor has the advantages of room temperature operation, compact structure, low power consumption and compatibility with CMOS technology, and provides a device basis for constructing an efficient gas sensing front end suitable for a brain-like intelligent sensing system.

The invention relates to a sensor comprising a solid-state layer structure which has the following elements: a first layer (110) having a semiconductor material; a second layer (150) having a gold material and an oxygen material; and an insulation layer (120) provided between the first and the second layer.

The application relates to a non-360-degree rotary scanning type capacitance tomography device, which is structurally characterized in that an insulating rotating drum is coaxially connected to the rotating part of a hollow rotating table, a plurality of capacitance detection electrode plates are uniformly distributed on the outer wall of the insulating rotating drum, a radial shielding electrode is arranged between every two adjacent capacitance detection electrode plates, axial shielding electrodes are arranged at the two ends of the plurality of capacitance detection electrode plates, and a shielding cover is arranged outside the capacitance detection electrode plates. The non-360-degree rotary scanning type capacitance tomography device can obtain more detection capacitance projection data under the premise of keeping the difficulty of the original capacitance measurement circuit and the anti-noise interference performance of the capacitance tomography device without changing the size and quantity of the capacitance detection electrode plates, and can overcome the underdetermination of the capacitance tomography system to a certain extent.

This invention discloses a micro tweezer based on vanadium dioxide nanowires, comprising a silicon substrate, a vanadium dioxide nanowire actuator, a heating unit, a power supply, a capacitance detection circuit, and a data processing and recognition unit. The silicon substrate has clamping arm electrodes and heating unit electrodes. The clamping arm of the vanadium dioxide nanowire actuator has a double-layer structure of vanadium dioxide nanowires and a metal layer. The heating unit heats the clamping arm to deform it, achieving clamping. The capacitance detection circuit, combined with the recognition unit, can determine the clamping state and identify the type of object being clamped. This invention utilizes the double-layer structure of the clamping arm, taking advantage of the significant heterogeneous interfacial stress between the vanadium dioxide nanowires during phase transition and the surface-deposited metal layer. This allows a single nanowire to generate a bending displacement exceeding 5% or even higher of its own length. The clamping arm exhibits large displacement and strong environmental adaptability. Integrating sensing and recognition functions, it enables precise clamping, transfer, and type identification of micro- and nano-sized objects, making it compatible with micro- and nano-electromechanical systems (MEMS).

The application provides a battery immersion liquid insulation detection device and method. The device comprises: a resistivity acquisition module arranged in the immersion liquid of a battery module, used for acquiring the resistivity of the immersion liquid; a dielectric constant acquisition module arranged in the immersion liquid, used for acquiring the dielectric constant of the immersion liquid; an insulation impedance acquisition module electrically connected with a battery cluster, used for acquiring the insulation impedance of the positive and negative electrodes of the battery cluster to the ground; and a control module electrically connected with the resistivity acquisition module, the dielectric constant acquisition module and the insulation impedance acquisition module, respectively, used for controlling the output of the immersion liquid insulation detection result according to the resistivity, the dielectric constant and the insulation impedance. The application acquires the electrical parameters of the immersion liquid and the insulation impedance of the battery cluster through the resistivity acquisition module, the dielectric constant acquisition module and the insulation impedance acquisition module, respectively, integrates and analyzes through the control module, realizes comprehensive acquisition and accurate detection, and greatly improves the accuracy of the battery immersion liquid insulation detection.

This utility model relates to a sensing device for analyzing the degree of aging and degradation of liquid or paste-like materials and the impurity content in the materials, and a wind power generation device. The sensing device includes: a vibration unit, which includes a crystal oscillator that applies shear vibration to the materials under an excitation voltage; a sensing unit, which includes at least one sensor composed of interdigitated electrodes arranged on the vibration unit to detect changes in the dielectric properties of the materials under shear vibration; and a calculation unit, which is communicatively connected to the vibration unit and the sensing unit, respectively. The calculation unit receives and processes a first signal from the vibration unit and a second signal from the sensing unit, and determines the aging and degradation of the materials and the impurity content in the materials based on the first and second signals.

To provide a sensor capable of obtaining high detection sensitivity.SOLUTION: According to the embodiment, a sensor includes a substrate, a fixed electrode, a first fixed section, a first support section, and a movable section. The substrate includes a first area and a second area. The fixed electrode is fixed to the first area. The first fixed section is fixed to the second area. The first support section is connected to the first fixed section. The first support section includes a first support layer, a first layer, and a second layer. The first layer is provided between the first support layer and at least one portion of the second layer in a first direction from the first support layer to the second layer. The first layer contains a first element containing at least one selected from a group comprising Pt, Pd, and Ti, and oxygen. The second layer contains a second element different from the first element, and oxygen. The movable section is supported by the first support section. A first gap is provided between the fixed electrode and the movable section.SELECTED DRAWING: Figure 1

A device has a semiconductor chip comprising a substrate and an integrated circuit, a metal stack of metal layers connected to the semiconductor chip, and a planar spiral differential inductor comprising at least two metal layers of the metal stack, wherein the semiconductor chip defines a semiconductor plane having a semiconductor plane normal vector and the planar spiral differential inductor defines an inductor plane having an inductor plane normal vector, wherein an angle between the semiconductor plane normal vector and the inductor plane normal vector is between 1 and 90 degrees; a sensing membrane operable to become electrically charged when interacting with an ionized fluid, wherein the sensing membrane is operable to electrically communicate with the planar spiral differential inductor; and a fluid property measurement circuit operable to measure a quality factor or inductance of the planar spiral differential inductor and output a fluid property signal.

The application discloses a device and method for detecting hydrogen impurity content in a pipeline, and relates to the technical field of hydrogen detection.The application uses a time-domain dynamic characteristic analysis algorithm, utilizes the difference between fluid pressure disturbance and impurity diffusion adsorption in the time response scale, accurately separates the high-frequency transient fluctuation characteristics caused by piston mechanical vibration from the original signal, and effectively filters out the interference caused by flow rate and pressure pulsation.Meanwhile, an adaptive model containing mechanical friction hysteresis logic is constructed, which can not only lock and inhibit the false drift of the dead zone state of the piston caused by static friction force, but also can smooth and repair the elastic overshoot generated in the moment when the piston breaks the static friction force, and deeply compensate for the hardware physical defects, so that the device can still output the detection results with high signal-to-noise ratio and truly reflecting the impurity concentration without pursuing extremely high mechanical processing precision.

The present application relates to the technical field of detection and optimization of oil paper insulation material, and provides a method and system for determining moisture distribution in oil paper insulation under different temperature fields, which comprises the following steps: an oil paper insulation state evaluation step: a physical model of the oil paper insulation is established, and insulation performance indexes of the oil paper insulation are calculated based on historical operation data and the physical model; a moisture distribution determination step: the distribution of moisture in the oil paper insulation is analyzed based on the insulation performance indexes, and if the deviation of the moisture distribution from an expected distribution is greater than a first threshold value, a detection or treatment strategy is adjusted so that the deviation of the moisture distribution in the oil paper insulation from the expected distribution is less than or equal to the first threshold value; an insulation performance optimization step: if the insulation performance of all the oil paper insulation meets a predetermined standard, the detection ends; otherwise, the insulation performance of a region to be optimized is optimized, and the moisture distribution determination step is returned; the present application can effectively guarantee the reliability of the oil paper insulation and prolong the service life thereof.

This invention relates to a sensor-based method for determining the flushing timing of permeable asphalt pavements. The method includes: preparing asphalt mixture specimens; testing the capacitance value of the specimens using a planar capacitance sensor; testing the permeability coefficient of the specimens; conducting multiple in-situ clogging tests; testing the capacitance value and permeability coefficient of the specimens after the clogging tests; correcting the permeability coefficient and calculating the degree of clogging after each set of tests; finally, fitting the relationship between the degree of clogging and the capacitance value, optimizing and establishing a fitting formula suitable for actual conditions, and then detecting actual permeable asphalt pavements. Based on the clogging degree standard, a flushing timing decision is made for the permeable asphalt pavement. This invention allows the actual pavement capacitance value obtained by a planar capacitance sensor to be converted into the corresponding degree of clogging through a fitting formula, achieving non-destructive continuous detection of the clogging state of asphalt pavements, improving pavement detection efficiency, and having significant implications for determining the flushing timing of permeable asphalt pavements.

The utility model discloses a device for measuring the moisture content of grain, including container, electrode plate still includes the printed circuit board for installing the control circuit of bearing, the middle part of container is provided for loading temperature sensing unit's temperature measurement stick, the downward extension of container forms a plurality of stand, each stand forms the space for placing the installation printed circuit board below the container. The utility model discloses when using, compared with traditional pin type grain moisture tester, the structure arrangement of this scheme is relatively simple, need not be limited to fixed instrument operating platform, and the layout structure is more reasonable, and the cost is reduced significantly, has good popularization prospect.