516results about "Material impedance" patented technology

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 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.

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.

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.

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.

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 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 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.

A method of operation of a measurement system includes: generating a microwave excitation towards a sample; scanning the sample along a path at a first vertical position relative to the sample; capturing a first microwave response along the path at the first vertical position based on the microwave excitation; generating a first channel voltage based on the first microwave response; scanning the sample along the path at a second vertical position relative to the sample; capturing a second microwave response along the path at the second vertical position based on the microwave excitation; generating a second channel voltage based on the second microwave response; and determining a voltage difference between the first channel voltage based on the first vertical position and the second channel voltage based on the second vertical position for characterizing the sample.

Disclosed herein is a system for identifying microbial growth. The system comprises a cartridge for receiving a sample that may comprise a pathogen, the cartridge comprising an array of wells, each well comprising an electrochemical transducer. The system also comprises a processor configured to interrogate each of the electrochemical transducers, wherein interrogation of the electrochemical transducers comprises, for each well: generating a first data series by repeatedly measuring a first dependent variable; and generating a second data series by repeatedly measuring either the first, or a second dependent variable. The processor is further configured to determine, based on the first and second data series from each well, whether there has been microbial growth in any of the wells.

The application provides a detection system for interface peeling defects of a steel shell inner wall and concrete, which comprises a detection device, and the detection device comprises a signal generator, a signal amplifier, a plurality of piezoelectric material sheet assemblies, a signal acquisition assembly and a data analysis processor which are electrically connected in sequence; the plurality of piezoelectric material sheet assemblies are attached to the outer wall of the steel shell at intervals to form an electromechanical coupling system. The piezoelectric material sheet is arranged on the outer wall of the steel shell of the steel shell concrete component as a driver and a sensor at the same time, the electromechanical coupling impedance spectrum of the piezoelectric material is measured in a self-generating and self-receiving mode, the abnormal value of the electromechanical coupling impedance spectrum is analyzed, the RMSD of the electromechanical coupling impedance spectrum of the measuring point and the reference measuring point is calculated, the sensor position corresponding to the abnormal signal is screened out, and thus the accurate positioning and range estimation of the interface peeling defects are realized.

A sensing system for a mixture that includes a sensing zone containing a mixture. A sensor is inside the sensing zone that includes a printed circuit board (302), a transmitting electrode (310) configured to generate an electrical field, and a receiving electrode (320). The transmitting and receiving electrodes are configured to directly contact the mixture. The sensor is configured to sense an electrical parameter value for the mixture. The system also includes a signal analyzer (962) that, based on the detected electrical parameter, determines a water content of the mixture.

The application provides an ion concentration online monitoring device and method for waste acid regeneration based on the Internet of Things, and relates to the technical field of ion monitoring. The device comprises a monitoring box, a cover plate is arranged on the upper end of the monitoring box, a feeding pipe for liquid supply is arranged in the center of the cover plate, a drain pipe for liquid discharge is arranged at the bottom of the monitoring box, a detection table is arranged at the center of the bottom of the monitoring box, a mounting hole is arranged through the center of the detection table, and a detection mounting column is arranged in the mounting hole in a matched mode. The application combines hardware and software, thereby greatly improving the detection accuracy of ion concentration.

Provided is a device for inspecting an object with high efficiency, low cost, and high accuracy. An electrical signal measurement electrode device (electrode device 10) is connected to an electrical signal measurement unit (overall current measurement unit 22) that measures current flowing through an object T by applying an electrical signal to the object T. The electrical signal measurement electrode device comprises: a plurality of probe pins (unit probe pins 111) that can extend and contract along the axial direction; and a conductive sheet 12 that is attached to the tips of the plurality of probe pins and forms a contact surface with respect to the object T. The shape of the contact surface changes in a manner following the surface shape of the object T.

The state diagnosis method includes a measurement step of measuring a relative dielectric constant of a lubricant by applying a voltage to the lubricant while changing a frequency using an alternating current power supply, a derivation step of deriving a parameter indicating an electrical characteristic of the lubricant by applying the relative dielectric constant measured in the measurement step to a theoretical formula, and a diagnosis step of diagnosing a state of the lubricant using the parameter.

The method includes, for example in one embodiment, exposing an odorant to a sensor array having a first sensor and a second sensor respectively configured with a first response characteristic and a different second response characteristic. In one embodiment, in response to the odorant, the first sensor outputs a first sensor signal having a signal-time characteristic and the second sensor outputs a second sensor signal having a different signal-time characteristic due to the different second response characteristic. In one embodiment, the method includes generating a signal having a complex waveform shape corresponding to the odorant, and optionally to a concentration of the odorant, using the first sensor signal and the second sensor signal. The generating includes, for example in one embodiment, converting the first sensor signal and the second sensor signal into respective sensor signal modulated oscillatory signals, and combining the sensor signal modulated oscillatory signals.

The invention relates to a microfluidic component used for electrical impedance measurement through a biological object (O), said microfluidic component comprising: A support in which is made a main microfluidic channel (C_1) defining a path for the circulation of a fluid containing the biological object (O), A trapping device positioned in the main microfluidic channel (C_1) on the circulation path of said biological object, At least one first electrode and a second electrode intended to be each set at a distinct electrical potential, in order to perform said impedance measurement, Said trapping device being composed of at least one first central pillar (P_1) and a second central pillar (P_2) positioned inside the microfluidic channel, The first central pillar being configured to form the first electrode and the second central pillar being configured to form the second electrode.Figure to be published with the abbreviation: Figure 2.

A technique is provided that allows use of a multielectrode array device to measure the impedances of biological samples. An impedance measurement apparatus (1) includes a measurement container (10), a plurality of first electrodes (31), a second electrode (32), a third electrode (33), a voltage application circuit (43), a current detection circuit (45), and a voltage detection circuit (47). The first electrodes (31) are arranged in an array on the bottom surface of the measurement container (10). The second electrode (32) and the third electrode (33) are located inside the measurement container (10). The voltage application circuit (43) applies a voltage between each first electrode (31) and the second electrode (32). The current detection circuit (45) detects current flowing through each first electrode (31). The voltage detection circuit (47) detects a voltage between each first electrode (31) and the third electrode (33).

This application relates to the field of vehicle braking component testing technology, and particularly to a calibration and testing device and method based on an electric vehicle electronic fuel dispenser. The calibration and testing device includes a fixing fixture, a wiring harness connection unit, a host computer system, a transmission unit, and a PLC control system. The fixing fixture is used to hold the electric vehicle electronic fuel dispenser to be tested. The wiring harness connection unit includes a power supply and a calibration programmer. The host computer system is connected to the calibration programmer via a universal serial bus port. The transmission unit includes a positioning fixture, a telescopic cylinder, and a servo motor. One end of the positioning fixture is fixedly connected to the servo motor, and the servo motor is fixedly connected to the telescopic cylinder. One end of the PLC control system is connected to the host computer system via a network cable. This application ensures the synchronization and consistency of calibration and testing procedures for different fuel dispensers, and allows for intuitive comparison of line graphs of test results from different angles of the same fuel dispenser, achieving fully automated operation and quantitative performance evaluation.

The invention relates to the technical field of rare earth resource exploration, in particular to an ion adsorption type rare earth content determination method, system, equipment and medium, and the method comprises the following steps: constructing a quantitative relation prediction model between normalized charge rate and total rare earth oxide mass fraction, arranging an impedance measurement system in a research area, and collecting impedance amplitude and phase; and obtaining a normalized charge rate based on the impedance amplitude and the phase, constructing a quantitative relation prediction model between the normalized charge rate and the total rare earth oxide mass fraction, and calculating to obtain the total rare earth oxide mass fraction based on the quantitative relation prediction model. According to the method, the surface electrical influence of the ion adsorption type rare earth ore sample is considered, the correlation between the spectrum induced polarization response and the chemical parameters is established, and the content of the rare earth oxide in the ion adsorption type rare earth sample is estimated by using the correlation.

A state detection method detects a state of an oil film formed by a lubricant in an apparatus configured to lubricate a plurality of sites with the lubricant, the state detection method having: a measurement step of measuring an impedance and a phase angle of a circuit composed of the plurality of sites by applying an alternating voltage to the circuit while varying a frequency; and a derivation step of deriving an oil film thickness formed by the lubricant and a parameter representing an electrical characteristic at the oil film thickness, based on a relative dielectric constant of the lubricant at a high frequency limit and the measured impedance and phase angle.

The invention relates to the technical field of health monitoring, and discloses a wearable intelligent clothing health monitoring system, which is characterized in that sweat biochemistry, sweat rate and microclimate signals are continuously acquired through a multi-mode sensing array integrated on electronic textile clothing, a processing module calculates fluid transmission flux of a clothing sweat passage according to microclimate and sweat rate data, and the fluid transmission flux of the clothing sweat passage is calculated according to the microclimate and sweat rate data. In-situ identification is carried out on a fabric pore transport retention coefficient representing the blocking characteristic of the porous structure of the fabric; a sensing interface biological passivation time constant is combined to construct system comprehensive response delay time reflecting double delay, and then a transmission distortion correction factor is calculated; and finally, inverting and restoring the sweat signal subjected to time domain aliasing into a real concentration trend of the skin end by using a fractional order inverse model based on the retention coefficient, and introducing a transmission distortion correction factor as a dynamic confidence penalty term into a health risk assessment model, thereby realizing accurate and real-time health early warning.

A test device for monitoring sterilization using a steam sterilant in a chamber is provided. The test device includes a test stack. The test stack includes an entrance layer including an entrance hole. The test stack further includes a sensor layer spaced apart from the entrance layer. The sensor layer includes a pair of electrodes disposed on the sensor layer. The test stack further includes a sensor coating disposed on a portion of the sensor layer and including an electrically active polymer. The test stack further includes a channel layer disposed between the entrance layer and the sensor layer. The channel layer includes an internal channel. The internal channel is configured to allow a flow of steam sterilant from the entrance hole to the sensor coating.