860results about "Material impedance" patented technology

The invention discloses a radiator salt spray corrosion life prediction method based on dynamic time warping, which belongs to the technical field of material corrosion test and life prediction, and comprises the following steps: collecting time sequence data of surface impedance and thermal resistance change of a radiator, constructing a dual-channel corrosion characteristic data set, and recording a salt spray concentration data value. The temperature data value and the humidity data value are combined, and an environment sensitivity weight vector is established. Accelerated corrosion in a salt spray environment is simulated, a laboratory accelerated corrosion test spectrum is generated, meanwhile, an actual environment fluctuation spectrum is monitored, the two spectrums are aligned by using a weight vector, accelerated corrosion data are obtained, and a basic life prediction value is calculated. And calculating an environment-structure coupling factor by combining the interaction between the three-dimensional structure characteristic parameters of the radiator and the temperature and humidity data values, correcting the basic life prediction value, and generating a final life prediction result. According to the method, double-channel feature alignment and coupling factor correction are adopted, and the corrosion life of the radiator of the specific structure under the actual working condition can be predicted.

The invention relates to an agricultural biomass characteristic intelligent detection method, system and device based on multi-frequency conductance coupling and a medium, and the method comprises the following steps: applying an electric excitation signal to an agricultural biomass sample, and synchronously collecting multi-physics coupling response data; based on the multi-physics field coupling response data, constructing a multi-scale equivalent circuit model comprising a resonance unit, a constant phase unit and a diffusion impedance unit; synchronously optimizing a resonance unit parameter, a constant phase unit parameter and an impedance unit parameter of the multi-scale equivalent circuit model through a Bayesian joint inversion algorithm to obtain an optimal parameter combination; and according to the optimal parameter combination, calculating a preliminary detection result of biomass components containing cellulose crystallinity, lignin crosslinking degree and water content, combining the collected environment temperature and humidity sensing data to implement dynamic compensation, and outputting a final detection result. Therefore, the detection precision, the environment robustness and the operation reliability are synergistically improved in three aspects of hardware design, model construction and algorithm optimization.

Apparatus for real time water content and water cement monitoring on a ready-mix concrete truck includes at least one real time moisture measurement module or sensor configured tosense continuous real time moisture measurements of a batch of wet cement loaded into a rotating drum of a ready-mix concrete truck; andprovide signaling containing information about the continuous real time moisture measurements sensed.The apparatus may include either a hatch door of the rotating drum of the ready-mix concrete truck, or the rotating drum of the ready-mix concrete truck, or the ready-mix concrete truck itself.

The invention relates to the technical field of material detection, in particular to a silver coating adhesive force detection method based on multi-frequency impedance imaging, which comprises the following steps: applying a dual-mode multi-frequency excitation signal to the surface of a silver coating through an attached microelectrode array, synchronously acquiring voltage-current response data, and generating a dual-mode multi-frequency impedance original data set; performing time-varying impedance phase-locked separation on the dual-mode multi-frequency impedance original data set, extracting a dynamic impedance component of a coating-matrix interface region, and reconstructing a three-dimensional sub-interface impedance distribution diagram; and outputting an adhesive force quantized value through an oscillation frequency-adhesive force conversion model according to the spatial oscillation frequency characteristics of the impedance phase in the three-dimensional sub-interface impedance distribution diagram. According to the invention, a double-phase-locked loop system is adopted to realize the time-varying component demodulation of the impedance response of the silver coating-matrix interface, the low-frequency dynamic impedance signal modulated by silver ion migration is effectively extracted, and the weak change of the interface bonding state is sensitively reflected.

The invention discloses a square lithium ion battery external insulation damage detection method, system, medium and equipment, and the method comprises the steps: carrying out the electrochemical impedance spectrum measurement of a square battery with an external insulation state to be detected, and obtaining an electrochemical impedance spectrum; building an equivalent circuit based on the electrochemical impedance spectrum to obtain each characterization electrical element parameter in the equivalent circuit; high-frequency insulation resistance and interface capacitance in the equivalent circuit are extracted, and the damage condition of the outer insulation film of the square lithium ion battery is detected through parameter differences.

The invention belongs to the technical field of soil research equipment, and aims to solve the problem of measurement errors when a time domain reflection device is used for measuring the ice content of soil. The invention provides a method and a device for testing the ice content of a soil body based on an electrochemical impedance modulus value. The method comprises the following steps: setting test parameters of the ice content of the soil body through an electronic computer; a temperature control device is used for adjusting and controlling test conditions of the soil body sample, and a control module drives the temperature control device to perform stepped cooling on the soil body sample; applying a disturbance signal to the soil body sample through the test module, and synchronously collecting a response signal sent by the soil body sample; calculating an experimental value of an electrochemical impedance module value by using electrochemical impedance data analysis software, fitting by combining with the temperature signal to obtain a fitting value of the electrochemical impedance module value, and substituting the value and the initial water content into a soil mass ice content calculation model to obtain the ice content of the soil mass sample. According to the invention, the ice content of the soil body can be rapidly and accurately calculated based on the chemical-electrochemical impedance modulus value.

The invention relates to the technical field of concrete detection, in particular to a concrete protective layer void detection method and system based on a detachable piezoelectric ceramic sensor and an electromechanical impedance resonance technology. The detection method comprises the following steps: temporarily fixing a detachable piezoelectric ceramic sensor on a detection point on the surface of a concrete structure; applying an alternating-current sweep-frequency voltage to excite the piezoelectric ceramic sensor, and obtaining an electromechanical impedance signal frequency spectrum; the electromechanical impedance signal frequency spectrum is analyzed, the frequency of a local defect formant is obtained, and according to the frequency of the local defect formant, geometric parameters of a void area are estimated through a defect size and frequency relation model; and moving the sensor and repeatedly detecting other detection points. The detection method has high efficiency and flexibility, and detection can be realized in any environment; the single-point detection speed is high, the efficiency is high, baseline data is not needed for detection, the anti-interference performance is high, and rapid positioning and quantitative evaluation of void damage can be achieved.

A wireless power transmitter that transmits power to a wireless power receiver, the wireless power transmitter including a communication unit configured to communicate with the wireless power receiver; and a controller, wherein the communication unit receives a plurality of packets including a foreign object detection (FOD) status packet from the wireless power receiver, wherein the controller determines whether a foreign object is present in a charging area of the wireless power transmitter on the basis of the FOD status packet, wherein the communication unit transmits, to the wireless power receiver, a response signal indicating whether the foreign object is present in the charging area of the wireless power transmitter on the basis of a result of the determination, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, and wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a configuration packet, an identification packet for transmitting receiver identification information, an extended identification packet, a general request packet, a special request packet, a control error packet, a renegotiation packet, a 24-bit received power packet, an eight-bit received power packet, and a charging status packet.

A method of monitoring a condition prevailing inside a piping system with respect to an impairment due to accretion, abrasion or corrosion caused by fluid(s) flowing through the piping system is disclosed, comprising the steps of: installing at least two measurement devices susceptible to an impairment and configured to measure variables indicative of the impairment; wherein the measured variables include at least two variables exhibiting a different dependency on the impairment; continuously recording data including time series of measured values of the variables measured; based on training data included in the data determining a dynamic reference behavior of the variables corresponding to time dependent distributions of values of the variables to be expected of the measured values when the measurement devices are unimpaired; repeatedly determining a deviation between a monitored behavior of the measured values of the variables and the reference behavior.

A wireless power receiver that receives power from a wireless power transmitter, the wireless power receiver including a communication unit configured to communicate with the wireless power transmitter; and a main controller, wherein the main controller generates a plurality of packets including a foreign object detection (FOD) status packet, wherein the communication unit transmits the FOD status packet to the wireless power transmitter, and the communication unit receives, from the wireless power transmitter, a response signal indicating whether a foreign object is present in a charging area of the wireless power transmitter, wherein the response signal is determined using a measured peak frequency of a power signal transmitted by the wireless power transmitter and a reference peak frequency included in the FOD status packet received from the wireless power receiver, and wherein the plurality of packets further include at least one of a signal strength packet, an end power transfer packet, a power control hold-off packet, a configuration packet, an identification packet for transmitting receiver identification information, an extended identification packet, a general request packet, a special request packet, a control error packet, a renegotiation packet, a 24-bit received power packet, an eight-bit received power packet, and a charging status packet.

Disclosed herein is a sensors-as-a-service ecosystem. In use, the system includes functions for receiving first sensor data at a sensors as a service platform, where the first sensor data corresponds to a first level of capabilities for a first sensor. The system also receives a selection of a sensor upgrade for the first sensor and provisions enhanced sensor capabilities for the sensor upgrade based on the selection. Furthermore, the system sends a sensor update with the enhanced sensor capabilities from the sensors as a service platform to the first sensor. Finally, the system receives second sensor data from the first sensor at the sensors as a service platform, where the second sensor data corresponds to a second level of capabilities for the first sensor.

The present disclosure provides a method for detecting a foreign object placed in a charging area of a wireless power transmitter and a wireless power transmitter. The method includes transmitting, by the wireless power transmitter, a power signal having a predetermined strength; measuring, via a controller, a peak frequency of the power signal; receiving, from a wireless power receiver, a data packet including a mode bit field, the mode bit field indicating whether the data packet includes a reference peak frequency of the wireless power receiver, wherein the reference peak frequency is pre-assigned to the wireless power receiver; in response to the mode bit field indicating that the data packet includes the reference peak frequency, determining, via the controller, an adaptive threshold frequency adjusted based on the reference peak frequency; and determining, via the controller, whether a foreign object is present in the charging area based on a comparison of the measured peak frequency of the power signal and the determined threshold frequency.

Systems and methods for monitoring conductivity of a fluid comprising generating a first measurement indicative of the conductivity of the fluid, determining whether a value of the first measurement is within the first calibration range, responsive to determining that the value of the first measurement is not within the first calibration range, calibrating the conductivity sensor with a second calibration range that includes the value of the first measurement, generating a second measurement indicative of the conductivity of the fluid.

The invention discloses a test device and method for in-situ monitoring of hydrates by using thermal-electric coupling, and belongs to the technical field of experiments for simulating generation and decomposition of hydrates in laboratories. The device comprises a hydrate synthesis and decomposition system, a temperature control system, a pressure control system, a thermal-electric parameter measurement system, a gas collection system and a data acquisition and user monitoring system, wherein a multi-point temperature sensor, a resistivity measurement probe and a heat conductivity coefficient measurement probe are arranged in a reaction kettle cavity; in-situ and real-time monitoring of multiple physical property parameters such as temperature distribution, resistivity change and heat conductivity coefficient in the whole process of generation and decomposition of the hydrate sample can be realized. According to the invention, thermal-electric coupling monitoring can be realized under high-pressure and low-temperature conditions, and a high-precision means is provided for hydrate formation mechanism research and exploitation processes.

Systems and methods for concurrent multi-frequency impedance measurements to characterize a substance of interest (e.g., analyte concentration) are disclosed herein. Generally, in some variations a method for characterizing a substance includes generating an input signal having a first set of frequency components across a plurality of frequencies, exciting an electrode arrangement with the input signal wherein the electrode arrangement is in contact with the substance. receiving an output signal from the excited electrode arrangement, the output signal having a second set of frequency components across the plurality of frequencies, determining an impedance signature of the substance across the plurality of frequencies, based on the first and second sets of frequency components, and characterizing the substance based on the impedance signature.

The invention relates to the technical field of circuit board detection, in particular to a printed circuit board drilling quality detection method and device, and the method comprises the steps: injecting sinusoidal current signals with preset frequencies into a plurality of test points of a to-be-detected drilling region of a printed circuit board, extracting impedance values under each frequency component, and calculating the drilling quality of the printed circuit board; constructing an equivalent impedance spectrum containing a real part and an imaginary part according to the impedance value; according to the interlayer structure and the equivalent impedance spectrum of the printed circuit board, calculating equivalent resistance and equivalent capacitance of the drilling area to be measured to form a characteristic parameter set; comparing the data of each grid point in the characteristic parameter set with a preset threshold value, and integrating the grid points exceeding the preset threshold value to generate a defect state mark; and performing electrical topology constraint on the defect state mark to generate a defect positioning result. According to the invention, hidden defects in the drill hole and interlayer structures can be deeply detected, the electrical performance of the drill hole can be comprehensively evaluated, and accurate defect positioning and state marking can be provided.

The invention provides a bionic ionic gel humidity sensing material as well as a preparation method and application thereof. The bionic ionic gel humidity sensing material is prepared from the following raw materials in parts by mass: 50 to 55 parts of acrylic acid, 20 to 25 parts of acrylamide and 20 to 25 parts of conductive ionic liquid, the coating also comprises a cross-linking agent and a photoinitiator; wherein the dosage of the cross-linking agent is 0.1 wt%-1wt% of the sum of the dosage of the acrylic acid and the dosage of the acrylamide; the dosage of the photoinitiator is 0.1 wt%-0.5 wt% of the sum of the dosage of the acrylic acid and the dosage of the acrylamide. The ionic gel with a bionic structure is formed by synergistically proportioning double monomers (acrylic acid / acrylamide) and the conductive ionic liquid and combining a specific cross-linking system, and the ionic gel is sensitive to humidity change response and remarkable in signal strength. The device is suitable for being applied to the fields of respiration monitoring and non-contact switches.

A method for battery authentication includes, at a battery controller of a battery subsystem, measuring a test electrochemical impedance spectroscopy (EIS) response of one or more battery cells connected to the battery controller. The test EIS response is compared to a historical EIS response stored in a storage subsystem, wherein the historical EIS response corresponds to one or more authentic battery cells associated with the battery controller. Based at least in part on a measured similarity between the test EIS response and the historical EIS response, the battery controller outputs an authenticity determination for the one or more battery cells connected to the battery controller.

The invention discloses a detection method for rapid real-time drug effect evaluation and application of the detection method. The detection method comprises the following steps: providing a quantitative corresponding relation between a same-generation calibration change value of electrical characteristics caused by physiological changes such as cell same-representative characteristics and the like and the cell proliferation ability; adhering to-be-detected cells to the surface of the same membrane electrode; applying the medicine to be detected, and observing the same generation measurement change value of the electrical characteristics in a cell proliferation cycle; and based on the quantitative corresponding relationship, obtaining the drug effect of the corresponding real-time proliferation characteristic evaluation drug. According to the detection method provided by the invention, the physiological changes such as the same-representative characteristics of the adherent cells are monitored through the membrane electrode, and after the quantitative corresponding relation between the change indexes of the same-representative characteristics of the cells and the proliferation capacity of the cells is established, the cell proliferation capacity is detected; the change of the cell proliferation capacity can be predicted through physiological changes such as the same representative characteristics of the cells before proliferation and apoptosis of the cells, so that the judgment period of the influence of the medicine on the cells can be greatly shortened, and the progress of medicine evaluation and research and development can be remarkably accelerated.

The invention relates to the field of electrical variable measurement, in particular to an insulating layer compactness detection method for a mineral cable, which comprises the following steps: firstly, acquiring a time domain reflection signal of the cable, and carrying out denoising pretreatment by utilizing synchronous average and wavelet transform; and then, carrying out spectrum analysis on the discrete signal segments, calculating a spectrum centroid offset rate to determine high-frequency energy attenuation, and constructing a dynamic compensation gain coefficient according to the high-frequency energy attenuation. And then, improving a traditional layer stripping algorithm by using the gain coefficient, eliminating calculation deviation caused by transmission loss, and accurately reconstructing characteristic impedance distribution along the cable. And finally, by comparing the deviation between the reconstructed impedance and the nominal impedance, positioning and judging the abnormities of the compactness of the insulating layer of the cable and the eccentricity defect of the cable core are realized.

The invention relates to the technical field of circuit load state monitoring, and discloses a directional drilling pipeline surface coating damage characteristic analysis method based on data inversion, which comprises the following steps: injecting a dual-frequency composite excitation signal into a pipeline transmission loop; locking a current phase, collecting a magnetic flux gradient vector and performing orthogonal decomposition; according to the method, impedance distortion caused by medium heterogeneity is eliminated through the pilot frequency response difference, the problem of misjudgment caused by the fact that traditional detection depends on medium isomorphism hypothesis is solved, and the detection accuracy is improved. And accurate identification of transmission load leakage impedance abnormity is realized.

The present invention relates to a device (10) for automatically performing measurements and collecting measurement data and for generating at least one optimized sensor parameter for a metal oxide sensor (23) and / or an optimized analysis strategy of an evaluation unit (70) for determining a substance contained in a known sample. The device (10) comprises a sensor head (20) with at least one sensor (22) controlled by sensor parameters, two or more vessels for samples or liquids to be examined, a movement unit (40) for achieving a measurement position in which the sensor head (20) is arranged above one of the vessels, a control unit (50) for controlling the sensor (22) with a sensor parameter, and an evaluation unit (70) for evaluating the measurement data measured by the sensor. The present invention further relates to a corresponding method, a storage medium, and an AI unit (80).

The invention discloses a multi-parameter integrated online corrosion sensing method and a corrosion monitoring inductive probe, and the method comprises the steps: collecting corrosion rate, temperature, pH and flow velocity signals, completing the preprocessing, and constructing a time alignment data set; constructing a nonlinear temperature drift correction function, and compensating the corrosion rate temperature drift in combination with the temperature-sensitive coefficient; constructing a causal perceptron, extracting a stable path, and outputting an enhanced feature sequence and a parameter weight; normalizing the enhanced features, constructing sequence input, and inputting into an iTransform network for prediction; a multi-parameter membership matrix is generated, the weight is adjusted, and a fuzzy comprehensive corrosion state result is output; and fusing the prediction sequence and the state result to generate a corrosion risk level for risk early warning judgment. According to the method, online sensing, trend prediction and prospective risk assessment of the corrosion state of the industrial equipment are realized through a causal consistency evolutionary analysis and depth time sequence prediction method fusing multi-source working condition data.

The invention relates to a modularized and anti-noise variable-temperature electrical characterization test system and method, and the system comprises a vacuum pump, a cryostat, a refrigerator, a temperature controller, an electrical characterization system, and a computer. A sample table, a cold head, a heater and a temperature sensor are arranged in the cryostat; the vacuum pump is connected with the low-temperature thermostat through a vacuum pipeline and is used for adjusting the air pressure in the low-temperature thermostat; the refrigerating machine is connected with the cold head and is used for cooling the sample table; the temperature controller is used for collecting the temperature detected by the temperature sensor and controlling the heater; the computer is used for collecting data acquired by the temperature controller and the electrical characterization system and sending a control instruction to the temperature controller and the electrical characterization system; and the electrical characterization system is connected with the test sample on the sample table and is used for carrying out electrical characterization test on the test sample under modular configuration. According to the invention, the anti-noise capability in the data acquisition process can be improved.

The present disclosure relates to systems and methods for measuring glycated A1c hemoglobin. A glycated hemoglobin level measuring system includes a sample testing apparatus having a microchannel that compresses a blood sample traveling through, a first pair of electrodes coupled to the microchannel, and a second pair of electrodes coupled to the microchannel. The glycated hemoglobin level measuring system further includes an analysis apparatus having sensors coupled to the first and second pairs of electrodes and configured to calculate a travel time taken by a red blood cell to pass through the first and second pairs of electrodes. The glycated hemoglobin level measuring system can use the travel time to measure a rigidity of the red blood cells and the corresponding glycated hemoglobin level.

Systems and methods for measuring unique microelectronic electromagnetic signatures are provided. A method includes injecting a nondestructive signal as input into a port of an object. The method may further include receiving as output from a signal path within the object a unique frequency dependent complex spectrum comprising a reflection spectrum or a transmission spectrum. The method may also include generating a unique object signature based upon the port and the received spectrum. The method may still further include differentiating the object from a different object based upon a comparison of the unique object signature of each.

The present disclosure provides a method and a wireless power receiver for communicating with a wireless power transmitter. The method comprises: receiving, by the wireless power receiver, a power signal having a predetermined strength from the wireless power transmitter; transmitting, by the wireless power receiver, a data packet comprising a mode bit field to the wireless power transmitter, the mode bit field indicating whether the data packet comprises a reference peak frequency of the wireless power receiver, wherein the reference peak frequency is pre-assigned to the wireless power receiver; and receiving, by the wireless power receiver, a response from the wireless power transmitter indicating a presence or absence of a foreign object in a charging area, wherein the response is determined based on a comparison of a peak frequency of a measured power signal and an adaptive threshold frequency adjusted based on the reference peak frequency.

The invention discloses a device and a method for evaluating the separation performance of an ion exchange membrane based on an electrochemical impedance spectroscopy, and belongs to the technical field of ion exchange membranes. The device comprises an electrochemical workstation and an electrolytic tank, a first output end of the electrochemical workstation is connected with an induction electrode and a reference electrode, and a second output end of the electrochemical workstation is connected with a working electrode and a counter electrode; the electrolytic tank comprises a first electrolytic tank and a second electrolytic tank which are separated by a to-be-detected ion exchange membrane; the sensing electrode and the working electrode extend into the first electrolytic tank, and the reference electrode and the counter electrode extend into the second electrolytic tank. According to the invention, quantitative characterization of migration and diffusion resistance of different ions passing through the membrane is realized, and the separation performance of the ion exchange membrane on ions of different valence states is preliminarily evaluated according to the microscopic mass transfer process of the ions passing through the membrane.

The invention provides a microbiological detection device, system and method, and the method comprises the following steps: controlling a to-be-detected liquid to be input into an incubation cavity through a sample inlet for incubation, and collecting an impedance signal of the to-be-detected liquid in the incubation cavity through an electrode assembly; after determining that a microorganism proliferation trend exists in the liquid to be detected according to the impedance signal, controlling an indicator to be input into the incubation cavity through a reagent inlet, and acquiring a color verification image of the liquid to be detected in the incubation cavity through an image acquisition device; and determining a microbial detection result according to the real-time modal signal, wherein the real-time modal signal comprises an impedance signal and a color verification image. According to the invention, synchronous acquisition of multi-mode optical signals can be realized, the detection sensitivity and the anti-interference capability are improved, the detection efficiency is improved, and the detection error is reduced.

The invention discloses a corrosion detection sensor. Systems, devices, articles, and methods for corrosion detection are disclosed. An example apparatus includes an adhesive for removably directly coupling the apparatus to a region of a substrate; a first sensor for measuring a first parameter at the region; a second sensor for measuring a second parameter at the region, the first parameter and the second parameter being corrosion factors at the region; and a power source for providing power to the first sensor and the second sensor.