56 results about "Impedance analyzer" patented technology

The invention provides a resonance control method for an excimer lamp driven by a steep pulse edge, and relates to the technical field of molecular lamps. The resonance control method of the excimer lamp driven by the steep pulse edge comprises the following steps: S1, based on a dielectric barrier discharge equivalent circuit model, adopting a fast Fourier transform spectrum analysis method, measuring fundamental wave impedance characteristics of an LC resonance network through an impedance analyzer, establishing a transfer function containing parasitic parameters: Z (s) = [sLr + 1 / (sCr)] Rarc, and generating an initial resonance parameter set; by establishing a transfer function model containing parasitic parameters, combining fast Fourier transform spectrum analysis and accurately extracting fundamental wave impedance characteristics, the problem of resonance point offset caused by neglecting the parasitic parameters in a traditional method is solved, the precision of an initial resonance parameter set is improved, real-time phase difference data are identified on line by using a recursive least square method, and the real-time phase difference is obtained. Resonant frequency changes are dynamically tracked, frequency drift errors are compensated, resonance point tracking precision is controlled within + / -0.1%, and invalid discharge energy loss is remarkably reduced.

A method of determining beta radiation intensity based on calculated resonance frequency and calculated quality factor can include providing an electrical sensor comprising at least one prong, irradiating the first composite material of the one of the plurality of planar surfaces and the material of the second section with beta radiation from a beta radiation source; measuring at least one impedance value from the electrical sensor with an impedance analyzer; calculating at least one resonance frequency value based on the measured at least one impedance value; calculating at least one quality factor value based on the calculated at least one resonance frequency value; and determining the beta radiation intensity based on the calculated at least one resonance frequency value and the calculated at least one quality factor value.

The application provides an ultrasonic machining tool holder assembly quality detection method, device, equipment and medium, and relates to the technical field of ultrasonic machining. The ultrasonic machining tool holder assembly quality detection method comprises the following steps: acquiring an assembly quality detection graph generated by an impedance analyzer by sweeping frequency on a non-contact ultrasonic tool holder in a no-load state; determining an assembly quality detection result between a tool holder body and a transducer and / or an assembly quality detection result between a non-contact electric energy transmission device secondary side and the transducer according to a comparison result between the assembly quality detection graph and a preset target graph; wherein the non-contact ultrasonic tool holder comprises a machining tool holder and the non-contact electric energy transmission device; and the machining tool holder comprises the tool holder body and the transducer. The application can accurately determine the assembly quality of the non-contact ultrasonic tool holder.

The utility model provides a GJB289A bus network state detection device in an external field environment. The GJB289A bus network state detection device comprises a communication module, a waveform analysis module and an impedance analyzer, the communication module is in communication connection with the waveform analysis module and the to-be-tested bus, performs communication test on the to-be-tested bus, and records the communication state of the to-be-tested bus; the waveform analysis module is in communication connection with the bus to be tested to realize signal waveform test; the impedance analyzer is in communication connection with a to-be-tested cable corresponding to the to-be-tested bus, and carries out an attenuation test on the to-be-tested cable. By integrating the communication module, the waveform analysis module and the impedance analyzer, a GJB289A bus network can be tested to ensure the reliability and stability of communication. And the waveform analysis module and the impedance analyzer can test the signal waveform on the bus to be tested and analyze the impedance, so that the test requirements are met.

The application provides an indoor automatic ore drawing experiment simulation system and method, and relates to the field of automatic control. The indoor automatic ore drawing experiment simulation system comprises an adjustable ore drawing bin, an arch breaking device, a conveyor belt, a flow control plate, an impedance analyzer, a storage bin, a mechanical linkage device, an inclined guide rail, a laser detector and a computer control center. The system utilizes the specific conductivity of micro-difference materials to quickly detect, thereby obtaining a fast method for uniquely identifying the space movement law before and after particle drawing, simulating different inclinations, angles, segmented heights, ore drawing step distances and ore drawing port sizes, obtaining the drawing shape and loss and dilution rate, automatically detecting and solving the ore drawing port blockage problem, and repeatedly simulating the ore drawing conditions for particle drawing experiments under the same parameters without human intervention.

The invention discloses a solution separation control system for rubber anti-aging agent production, and relates to the technical field of rubber anti-aging agent separation control, and the system comprises the following modules: a radio frequency admittance detection module for respectively obtaining an inorganic phase test solution, an organic phase test solution and an emulsion layer test solution, obtaining an inorganic phase dielectric constant range, an organic phase dielectric constant range and an emulsion layer dielectric constant range at different temperatures through the inorganic phase test solution, the organic phase test solution and the emulsion layer test solution by using an impedance analyzer; according to the scheme, the interface height is measured through the radio frequency admittance meter and the ultrasonic interface level meter together, and whether the measurement result of the radio frequency admittance meter or the measurement result of the ultrasonic interface level meter is selected is judged according to the position of the probe of the radio frequency admittance meter, so that the situation that the probe penetrates through an emulsion layer and is polluted to affect the accuracy of the measurement result is avoided; and the influence of high-temperature steam and bubbles on the accuracy of the measurement result is avoided, so that the measurement result of the solution interface height is more accurate.

The invention discloses a magnetic ring saturation characteristic measurement method and device, and the method comprises the steps: building a measurement circuit which comprises an arbitrary waveform generator, a power amplifier, a measured magnetic ring and a matched load based on the reference data of an impedance analyzer, and setting a voltage sensor, a current sensor and a thermocouple to obtain the voltage, current and temperature data of the measured magnetic ring; impedance and inductance data are obtained through calculation and serve as actual measurement data; comparing the measured data with the reference data, defining the ratio of the inductance data attenuation of the measured magnetic ring to the inductance data measured by the impedance analyzer as the saturation rate of the magnetic ring, and recording the signal type, frequency, amplitude and temperature rise corresponding to the magnetic ring at the moment; by fixing the signal type and the frequency and adjusting the signal amplitude, the saturation characteristic of the measured magnetic ring along with the amplitude change under the signal type and the current frequency is obtained; whether the magnetic ring is saturated or not and the saturation degree can be judged, and whether the magnetic ring is available or not is judged by measuring the temperature rise after the magnetic ring is saturated.

The invention discloses a cable impedance spectroscopy defect positioning method and system, and belongs to the technical field of cable defect localization, and the method comprises the steps: measuring a to-be-detected cable through an impedance analyzer, obtaining a head end input impedance spectrum of the to-be-detected cable, comparing the head end input impedance spectrum with a head end input impedance spectrum of a healthy cable, and judging whether the to-be-detected cable has a defect or not; if defects exist, a plurality of pieces of temperature data in the circumferential direction of the intermediate joint are collected, whether the to-be-detected cable is aged or not is judged through the temperature difference between the peak value temperature data and the valley value temperature data, if not, the obtained head end input impedance spectrum of the to-be-detected cable is utilized, the frequency domain reflection method is directly used for conducting defect positioning on the cable, and if aging occurs, the frequency domain reflection method is used for determining the defect of the to-be-detected cable. And if not, compensating the obtained head end input impedance spectrum of the cable to be detected according to the aging degree, and carrying out defect positioning on the cable by using a frequency domain reflection method based on the compensated head end input impedance spectrum. According to the invention, interference of non-uniform aging on defect positioning can be weakened, and accurate positioning of cable defects is realized.

This invention relates to the field of bioelectrical impedance analysis (BIA) technology, and more particularly to a calibration device and method for a BIA. The technical solution is as follows: A calibration device for a BIA, the device being connected to a BIA host via a communication interface and a calibration port. The device includes: a main control unit for communicating with the host and parsing instructions from the host; a high-speed multiplexer, the control terminal of which is connected to the main control unit, and the output terminal connected to the calibration port; and a standard impedance network composed of multiple high-precision passive components, including resistors, capacitors, inductors, and their series-parallel combinations, wherein each impedance component is connected to a different input channel of the high-speed multiplexer. Through a highly integrated standard impedance network and an automatic switching mechanism, the calibration process is fully automated, completely eliminating human error and greatly improving calibration efficiency and consistency.

An impedance analyzer chip assembly may include a plurality of sensing regions, where each region of the plurality of sensing regions is configured to sense a gas, chemical, physical, or biological analyte. The impedance analyzer chip assembly may also include one or more processors configured to output one or more re-configurable impedance values across a frequency range of at least six orders of magnitude, output one or more re-configurable impedance values from one or more of the sensing regions of the plurality of sensing regions, concurrently output two or more impedance values from two or more of the sensing regions of the plurality of sensing regions, and concurrently output one or more impedance values at two or more frequencies.

The utility model discloses a household osteoporosis-sarcopenia combined monitoring and rehabilitation assisting device in the technical field of rehabilitation treatment, which comprises a leg sleeve, a portable ultrasonic bone mineral density instrument and a bioelectrical impedance analyzer, a plurality of grooves are arranged on the periphery of the leg sleeve, a plurality of electromagnets are fixedly connected in the leg sleeve along the periphery, and the electromagnets are connected with the bioelectrical impedance analyzer. A controller is fixedly connected in the leg sleeve, the controller is electrically connected with a data plug, and the portable ultrasonic bone mineral density instrument and the bioelectrical impedance analyzer are both in signal connection with a data socket. Through the arrangement of the leg sleeve, the electromagnet, the data plug and the data plugboard, the weight of the required balancing weight is determined according to data monitored by the portable ultrasonic bone mineral density instrument and the bioelectrical impedance analyzer, and then the balancing weight is attracted through the electromagnet, so that the weight of the balancing weight is adjusted. Through data, patients with osteoporosis and patients with sarcopenia can conveniently carry out aerobic training such as load-bearing jogging according to physical conditions, and therefore the recovery training effect is better achieved.

A device for detecting a hydration status of a user is disclosed. The device includes an electrode patch configured to be positioned on a user. The electrode patch includes a substrate including a first side positioned against the user and a second side, and a first electrode and a second electrode both positioned on the second side. The device further includes an impedance analyzer including a control circuit electrically coupled to the first electrode and the second electrode when the impedance analyzer is engaged with the electrode patch. The control circuit including a processor and a memory, the memory storing instructions executed by the processor to transmit an electrical signal to the first electrode and the second electrode, determine an impedance between the two electrodes, determine a hydration level based on the impedance, compare the hydration level to a threshold range, and transmit a notification based on the hydration level.

The invention provides a power cable local defect degree and type evaluation method based on an impedance spectroscopy method. The power cable local defect degree and type evaluation method comprises the following steps: acquiring an attenuation coefficient, a phase shift coefficient and characteristic impedance of a healthy cable in a frequency range; calculating the impedance spectrum of the to-be-measured cable, and measuring the impedance spectrum of the to-be-measured cable through an impedance analyzer; drawing a defect positioning function curve by adopting an improved orthogonal integral algorithm; obtaining a calculation peak value; calculating the reflection coefficient and the characteristic impedance of each defect section; and judging the defect degree and type, calculating the ratio of the characteristic impedance of the defect section to the characteristic impedance difference of the healthy cable, and obtaining the degree quantitative evaluation of the defect section. By calculating the severity of the defect section and judging the defect type, quantitative calculation and comparison of the defect degrees of various types of cables are realized, a unified defect degree evaluation method and a type judgment method are formulated for various types of cables, the anti-interference capability is relatively high, and the reliability is high. And a new method and thought are provided for cable defect state evaluation based on the impedance spectrum.

The application relates to an integrated wireless passive pressure sensor and an environmental air pressure detection device. The integrated wireless passive pressure sensor comprises a sealed substrate, a sensitive capacitor structure, a compensation structure, a first inductor connected with the sensitive capacitor structure, a second inductor connected with the compensation structure, and pads respectively welded with the first inductor and the second inductor. An impedance analyzer can be externally connected through the pads to measure a compensation resonance frequency of a compensation resonance loop composed of the compensation structure and the second inductor. When the air pressure in the environment where the integrated wireless passive pressure sensor is located changes, the air pressure sensitive resonance frequency of an air pressure sensitive resonance loop composed of the sensitive capacitor structure and the first inductor can be measured. The resonance frequency caused by the change of the air pressure in the environment can be determined according to the air pressure sensitive resonance frequency and the compensation resonance frequency. The integrated wireless passive pressure sensor can improve the measurement accuracy.

To provide an electrochemical impedance analyzer capable of addressing a case where each circular arc of Nyquist diagram indicated by EIS data of a measured battery may include a plurality of reaction resistance components and highly accurately deriving an equivalent circuit from the EIS data.SOLUTION: An electrochemical impedance analyzer 10 comprises a storage part 14 storing a material property database 14a including material feature quantity data, an acquisition part 12a acquiring EIS data, and an analysis part 12b deriving the equivalent circuit. The analysis part 12b identifies time constant of each of a first reaction resistance component and a plurality of second reaction resistance components by reference to the material property database 14a when one first reaction resistance component composing the equivalent circuit is determined to be composed by parallel connection of the plurality of second reaction resistance components, and derives the equivalent circuit by performing fitting processing using the identified time constant.SELECTED DRAWING: Figure 1

A described example relates to a system that includes a microfluidic device and an impedance analyzer. The microfluidic device includes a microchannel extending through a portion of a housing. The microchannel is configured to receive a fluid sample including blood cells that flows along in a direction of fluid flow through the microchannel. The microchannel includes a plurality of micropillar arrays along the direction of fluid flow, and each of the plurality of micropillar arrays is located between a respective pair of electrodes in the microchannel. The impedance analyzer can be coupled to each of the electrodes and configured to measure electrical impedance of at least some of the micropillar arrays at multiple times, in a wash-free assay, including at least one impedance measurement before the fluid sample is flowing through the microchannel and at least one impedance measurement after the fluid sample is flowing through the microchannel.

The invention discloses a magnesium electrolyte conductivity on-line determination device and a magnesium chloride concentration determination method, the device comprises an impedance analyzer, a controller, an isolation region, a moving electrode system and a static electrode system, the moving electrode system comprises a metal electrode coated with a first insulation tube and a linear power source driving the metal electrode to rise and fall; the static electrode system comprises a second insulating tube and a metal counter electrode, the metal counter electrode comprises a conducting rod and a conducting strip, and the conducting strip is located below the metal electrode. An isolation area is arranged in the magnesium collection chamber, and only electrolyte is arranged in the isolation area, so that the influence of metal magnesium liquid on an on-line measurement result is reduced; the moving electrode system, the static electrode system, the impedance analyzer and the controller are combined to obtain the conductivity of the electrolyte in the magnesium collecting chamber, so that the conductivity of the electrolyte in the electrolytic cell can be monitored online in real time, and the concentration of magnesium chloride in the electrolyte in the magnesium electrolytic cell can be further monitored online based on the conductivity of the electrolyte and the temperature of the electrolyte. And the result reliability is improved.

Evaluation of immune cells and cancer cells is provided by assessing cytolysis of cancer cells by effector cells, comprising: a) providing a cell-substrate impedance monitoring device operably connected to an impedance analyzer, the device including a well for receiving cells and an electrode array in the bottom of the well, and further operably connected to an imaging unit; b) adding target cells characterized as cancer cells to the well; c) disposing a layer comprising extracellular matrix (ECM) over the target cells; d) adding effector cells on top of the ECM layer; and e) imaging the well and monitoring the cell-substrate impedance of the well to determine invasion of the effector cells through the ECM layer and the effectiveness of the effector cells in killing the target cells directly or via migration and invasion through the extracellular matrix.

The invention discloses a broadband impedance spectroscopy-based high-voltage cable line aging analysis method, which comprises the following steps of: firstly disconnecting a power supply of a cable to be detected, discharging and grounding, and suspending the end part to expose a metal wire core and a shielding layer after the connection is removed; using a time domain reflectometer to measure the length of the cable and confirm the joint position; after carrying out short circuit and open circuit correction on the impedance analyzer, connecting the test clamp to a cable metal wire core and a shielding layer to form a closed loop; carrying out broadband impedance spectroscopy test in a frequency range of 500Hz to 5MHz, and recording voltage, current, impedance amplitude and phase difference; calculating a theoretical impedance spectrum of the cable based on a transmission line model, comparing first peak frequencies of theoretical and actually measured impedance spectrum amplitudes, and calculating a peak offset; and evaluating the aging state of the cable according to the peak offset. The method realizes lossless rapid evaluation of the aging state of the high-voltage cable line, is short in test time, and avoids accumulated damage of lossy detection to the service life of the cable.

The invention provides a frequency selection method of an eddy current probe, which comprises the following steps: S100, performing impedance analysis on the eddy current probe through an impedance analyzer to obtain a resonant frequency point f of the eddy current probe; and S200, by taking the resonant frequency point f of the eddy current probe as a center, respectively carrying out scanning analysis on two states of the eddy current probe in the air and on the carbon fiber material to obtain the optimal frequency of the eddy current probe during nondestructive testing of the carbon fiber material. And the detection frequency of the eddy current probe can be accurately selected, so that the detection efficiency is improved, and the detection precision and the detection sensitivity can be ensured.

The invention relates to a system for detecting contact between a first body part of a person and a second body part, comprising an electrical circuit, comprising a first electrode and a second electrode, each of which is electrically connected to a control device, and wherein the first electrode is in electrical contact with a first location on the person, and the second electrode is in electrical contact with a second location on the person, the second location being different from the first location, wherein the control device comprises a signal generator by means of which an alternating current or voltage signal can be applied across the electrodes, and a signal detector, and the signal detector comprises an impedance analyzer by means of which an electrical impedance between the first electrode and the second electrode can be measured. The first location and / or the second location is / are spaced apart from the body parts between which contact is formed. Furthermore, the invention relates to a method for detecting contact between body parts of a person.

The present disclosure relates to a system (100) for detection and identification of at least one species in a sample in an ionic exchange membrane (110), comprising an ion exchange membrane (110), an impedance analyser (120), source (141) and target electrodes (142), a voltage and / or current source (140) arranged to provide an electric potential difference, a computer (170), and at least two impedance electrodes (121, 122) arranged at the ion exchange membrane (110) and connected to the impedance analyser (120). The source (141) and target electrodes (142) are connected to said source (140), and are arranged to upon addition of source (151) and target electrolyte (152) be in ionic contact with a first (111) and second region (112) of the ion exchange membrane (110) respectively. The computer (170) is arranged to obtain source data comprising voltage data and / or current data from said source (140); obtain impedance data from the impedance analyser (120); and determine the presence of said at least one species in said sample based on the obtained source data, the obtained impedance data, and predetermined reference data for the ion exchange membrane (110).

This invention discloses a soil sample resistivity measuring device and method, comprising a soil sample box and a cover plate covering the soil sample box. Emitting electrode plates are placed inside both ends of the soil sample box, and two receiving electrode rods are inserted in the middle. The bottom of the transmitting electrode plates contacts the bottom of the soil sample box, and their sides extend to the side walls of the soil sample box. The cover plate has transmitting electrode slots for the transmitting electrode plates to pass through and receiving electrode holes for the receiving electrode rods to pass through. The transmitting electrode plates and receiving electrode rods are respectively connected to a full-waveform impedance analyzer after exiting through the transmitting electrode slots and receiving electrode holes, forming a four-electrode connection structure. This device, by adding a cover plate to the soil sample box and leading the long, strip-shaped transmitting electrode plates out from the top holes of the cover plate, can greatly reduce the contact between external air and the soil sample, avoid moisture evaporation, reduce the influence of the external environment on the soil sample, and ensure the accuracy of the test results.

Evaluating immune and cancer cells is provided for by assessing cytolysis of cancer cells by effector cells, which includes: providing a cell-substrate impedance monitoring device operably connected to an impedance analyzer, wherein the device comprises a well for receiving cells and an electrode array at a base of the well, the device further operably connected to an imaging unit; b) adding target cells characterized as cancer cells to the well; c) disposing a layer comprising an extracellular matrix (ECM) over the target cells; d) adding effector cells over the ECM layer; and e) imaging the well and monitoring cell-substrate impedance of the well to determine invasion of the effector cells through the ECM layer and effectiveness of effector cell killing of the target cells either directly or via migration and invasion through extracellular matrix.

The invention discloses a wireless passive sensing system and method based on adaptive gain. The wireless passive sensing system comprises a reading resonator and two sensing resonators. The read resonator includes a capacitor, an inductor, and a negative resistor. Each of the two sensing resonators comprises a capacitor, an inductor and a resistor. The natural frequencies of the two sensing resonators are kept symmetrically offset relative to the natural frequency of the reading resonator. By adding disturbance to any resistor in the two sensing resonators, a driving system is expanded to EP5, and the sensitivity in the sensing process is improved. Meanwhile, a vector network analyzer or an impedance analyzer is used as a negative resistor, and a zero crossing point of an input impedance imaginary part or a reflection coefficient imaginary part is used as an eigen frequency criterion in frequency scanning, so that a traditional'fixed gain-scattering extreme value 'is converted into a new measurement form of'impedance imaginary part zero crossing point-eigen frequency direct reading'.

The application relates to a cable end load analysis method and device based on cable head end impedance spectrum, which comprises the following steps: connecting the output port of an impedance analyzer to the core and metal shielding layer of a test cable; connecting the cable end to a pure resistive load, a plurality of specific impedance angle loads and an actual load to be measured in sequence; under various load conditions, collecting a plurality of impedance spectrum data corresponding to the cable end connected to various loads by using the impedance analyzer to test the incident sweep frequency signal of the cable; drawing the impedance spectrum data by using a computer to obtain the impedance amplitude spectrum waveform and the impedance phase spectrum waveform under various load conditions; comparing the impedance spectrum waveform of the actual load to be measured with the impedance spectrum waveform under the pure resistive load; determining the shift of the impedance spectrum oscillation peak value of the actual load to be measured according to the comparison result; and determining whether the actual load to be measured is capacitive or inductive according to the shift. The application can quickly and effectively determine the nature of the cable end load.

The cable state classification method based on the Bi-LSTM and the broadband impedance spectroscopy comprises the steps that a cable defect detection experiment platform is built, a standard impedance source is adopted to calibrate the measurement precision of an impedance analyzer, and then a detected cable is connected to the impedance analyzer; the method comprises the following steps: constructing three types of cable models through simulation: a normal cable model, a water-branch-containing cable model and an electric-branch-containing cable model, and obtaining a corresponding broadband impedance spectrum data set through establishing simulation models of the three types of cables; inputting the broadband impedance spectrum data set generated by simulation into a Bi-LSTM model for model training and exporting a confusion matrix; and importing broadband impedance spectrum data of a cable to be tested into the trained Bi-LSTM model, and outputting a classification result. According to the method, automatic and accurate classification of normal cables, water-branch-containing cables and electric-branch-containing cables is realized, and the efficiency bottleneck of manual detection is effectively overcome.

The application provides an intelligent control method for a hand rehabilitation training device, and relates to the technical field of device control. The method comprises the following steps: collecting pressure information and bending information, then acquiring image information, performing offset analysis, acquiring data collection offset categories, then analyzing a real-time training stage, performing assistance analysis, and then controlling the device, calculating force information array, and controlling the device through an impedance analyzer. The application mainly solves the problem that the existing hand rehabilitation training device lacks intelligent control, resulting in inaccurate device control and unstable training effect, and cannot be individually adjusted according to individual differences of users. Sensor technology is used to monitor the hand movement and strength of users, and the monitoring data is transmitted to the control system. The control system automatically adjusts the movement and strength of the training device according to the monitoring data and the preset training plan, thereby providing personalized rehabilitation training for users.

1. Name of the product in this design: Electrochemical Impedance Analyzer (Compact Type). 2. Purpose of this design: For testing the electrical parameters of electronic products. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses an inductor performance detection device, which belongs to the technical field of inductor manufacturing, and comprises a lifting rotation driving device and a lifting intermittent turntable, and a plurality of inductor vacuum suckers are distributed on the edge of the lifting intermittent turntable; the lifting rotation driving device is used for driving the lifting intermittent turntable to move and rotate by one station and to move and rotate by one station; an inductor feeding device, an inductor positioning device, an insulation resistance tester, an insulation resistance test unqualified inductor collecting box, a withstand voltage tester, a withstand voltage test unqualified inductor collecting box, an impedance analyzer and a capacitance test unqualified inductor collecting box are sequentially arranged on the periphery of the lifting rotation driving device and located below the lifting intermittent rotating disc. A vector network analyzer, a self-resonant frequency test unqualified inductor collection box and an inductor performance test qualified product collection box. The device has the characteristics of simple structure, high detection efficiency and clear classification of unqualified products.