122 results about "Impedance analyzer" patented technology

The invention belongs to the field of biomedical engineering, and particularly relates to a puncture operation tissue recognition system based on bioelectrical impedance, which comprises a dual-electrode impedance needle used for collecting electric signal data in real time; the feedback display equipment is internally integrated with a trained random forest model and is used for processing the electric signal data according to the trained random forest model to obtain a classification result; the multi-frequency bioelectrical impedance analyzer is used for displaying the real-time acquired waveform and displaying the classification result of the random forest model at the same time; the dual-electrode impedance needle comprises a needle tube structure and an electrode structure located at the head of the needle tube structure. According to the invention, electric signals of different tissues are effectively obtained, and measurement errors and signal interference are reduced.

The present invention discloses a puncture device and system with a hematoma monitoring function, which relates to the technical field of biomedical engineering. The device includes: an epidural puncture needle, including a needle body and a needle hub; an epidural catheter for entering the epidural space through the epidural puncture needle; the front end of the epidural catheter is an insertion section, which is longitudinally inserted along the epidural space after entering the epidural space, and an impedance measurement structure is provided corresponding to the insertion section for measuring the impedance value around the insertion section and transmitting it to an impedance analyzer; the impedance analyzer is used to receive the aforementioned impedance value and evaluate whether there is a hematoma in the epidural space according to the change information of the impedance. The present invention can sensitively, timely and accurately identify the occurrence and development risks of epidural hematoma, thereby helping to improve the quality of clinical medical safety and improve the perioperative prognosis of patients.

The invention relates to the technical field of automobile electrical detection, provides an automobile wire harness wire insulation skin damage detection method and system, and aims to solve the technical problem that a certain loop insulation skin damage position point is difficult to find in the prior art. Comprising a plane capacitance sensor used for measuring capacitance change between the plane capacitance sensor and a to-be-measured wire harness to obtain a charge signal used for representing the damage state of an insulating material of the to-be-measured wire harness; the charge amplifier is used for performing voltage conversion and amplification processing on the charge signal to obtain a voltage signal; the impedance analyzer is used for calculating impedance through the voltage signal and the current signal, drawing a Bode diagram based on the obtained impedance, and performing index parameter extraction on the Bode diagram to obtain various index parameters; and the upper computer is used for carrying out feature extraction on the multiple index parameters to obtain feature data, and analyzing the damage state of the insulating material of the wire harness to be detected according to the feature data to obtain a detection result.

The invention discloses a circle temperature detection system. Comprising a plurality of LC passive temperature sensors and a reading unit, the LC passive temperature sensor comprises a spiral inductor LS and a sensing capacitor CS which are connected in series; the reading unit comprises a reading inductor L0 and an impedance analyzer; when the temperature of the surface of the wafer where the LC passive temperature sensor is located changes, capacitance and resistance of the sensor can change, so that impedance of the sensor changes, and an impedance analyzer obtains the surface temperature of the wafer by remotely monitoring and analyzing real part values of a resonant frequency value and a maximum impedance value; the precision is higher, the response time is shorter, the compatibility with the integrated circuit manufacturing technology is higher, the power consumption is lower, and the size is smaller; the wafer temperature measurement system adopts a wireless mode, and no cable or lead needs to be connected to the surface of the wafer, so that the reliability and flexibility of temperature measurement are improved.

The invention discloses a common mode inductor impedance measurement method based on a vector network analyzer, and the method comprises the steps: firstly constructing a measurement clamp, and obtaining the initial values of a clamp inductor L2 and a clamp capacitor C2 in the measurement clamp through the preliminary calibration of the distribution parameters of the measurement clamp; measuring admittance of the clamp and the common mode inductor by using a vector network analyzer, and further calculating an impedance curve of the common mode inductor; correcting initial values of a clamp inductor L2 and a clamp capacitor C2 based on an impedance analyzer; for the same batch of measurement clamps, re-calibration or correction is not needed, and the corrected clamp inductance L2 and clamp capacitance C2 values are adopted to calculate the impedance curve of the common mode inductor.

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.

The invention provides a concrete-filled steel tube interface stripping defect positioning and detecting system, and relates to the technical field of structure monitoring. Piezoelectric ceramic sensors are installed on the outer wall of a steel tube of a concrete-filled steel tube member and the lower surface of an annular plate, an impedance analyzer is used for applying alternating voltage excitation, and the stripping defect of the concrete-filled steel tube interface is detected by means of the positive and negative piezoelectric effects of piezoelectric ceramic materials. And enabling the sensor to output an electromechanical coupling admittance frequency curve. Admittance data are processed and converted into picture data through a computer, the picture data are input into a convolutional neural network model, and accurate positioning of the concrete filled steel tube member interface stripping defect is achieved through feature extraction and classification of a convolutional layer, a pooling layer and a full connection layer. The system is particularly suitable for detecting local initial damage in a high-frequency range, has the characteristics of simplicity and convenience in operation, quick response and high visibility, and provides a quick and accurate solution for real-time detection of the concrete-filled steel tube member.

The invention provides a parameter determination method and a parameter model for a noise matching transformer, which can be applied to the technical field of transformers. The parameter determination method for the noise matching transformer comprises the following steps: when a secondary winding is in a predetermined state, measuring a plurality of input impedances at two ends of a primary winding and a plurality of phases at two ends of the primary winding by using an impedance analyzer, the plurality of input impedances comprise a plurality of first input impedances corresponding to an open-circuit state and a plurality of second input impedances corresponding to a short-circuit state; determining excitation inductance of the primary winding, equivalent capacitance of the secondary winding or magnetic core loss equivalent resistance according to at least one of a plurality of preset frequencies, first input impedance corresponding to the preset frequencies and direct current resistance based on the test frequency corresponding to the first phase and the plurality of frequency ranges; and determining the leakage inductance of the primary winding and the leakage inductance of the k sections of secondary windings based on the test frequency corresponding to the second phase and the plurality of frequency ranges.

The invention discloses an energy storage power station safety early warning system operation method based on a battery base layer coupling model. Comprising the steps that a sensor arranged on a single battery of an energy storage power station collects single battery voltage, single battery temperature and electrolyte leakage detection information, and a battery module detects impedance of a battery through an impedance analyzer to obtain internal resistance change of the module; and judging according to the number of the isolated monomers in combination with a detection numerical value obtained by the electrolyte detection sensor for correspondingly collecting the monomers under a fixed time length, and if the detection numerical value does not have a decreasing trend or the decreasing amplitude is smaller than a fixed value, generating a command packet for starting the spraying device and sending the command packet to a power environment system to execute the command.

1. The name of the product of this design: Portable impedance analyzer. 2. Purpose of this design product: used for measuring resistance value in experiments. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. The design for which protection is sought includes color.

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 invention discloses a microfluidic impedance-type biological online detection device, which belongs to the technical field of microfluidic biological detection. The microfluidic impedance-type biological online detection device comprises a host, an impedance analyzer, a multiplexer and a detection body. The host is connected to the impedance analyzer, the impedance analyzer is connected to the multiplexer, and the multiplexer is connected to the detection body. The detection body comprises a microfluidic chip, a collecting plate and an anti-overflow plate which are sequentially distributed from top to bottom. An introduction tube and an outlet tube are fixedly connected to the upper end of the microfluidic chip, and a one-way valve is fixedly connected to the inside of the introduction tube and the outlet tube. The invention not only reduces the overflow during sample introduction through the arrangement of the collecting plate and the anti-overflow plate, but also facilitates the collection of overflowed and drawn sample reagents, reduces the difficulty of sample drawing, improves the sample drawing efficiency, reduces the contamination of the sample on the surface of the microfluidic chip, and improves the sample detection efficiency.

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 puncture device and system with a hematoma monitoring function, and relates to the technical field of biomedical engineering. The device comprises an epidural puncture needle which comprises a needle body and a needle seat; the epidural catheter is used for entering the epidural space through the epidural puncture needle; the front end of the epidural catheter is an imbedding section, the imbedding section is longitudinally imbedded along the epidural cavity after entering the epidural cavity, and an electrical impedance measuring structure is arranged corresponding to the imbedding section and used for measuring the electrical impedance value of the periphery of the imbedding section and transmitting the electrical impedance value to the electrical impedance analyzer; and the electrical impedance analyzer is used for receiving the electrical impedance value and evaluating whether the epidural space has hematoma or not according to the change information of the electrical impedance. According to the invention, the occurrence and development risk of epidural hematoma can be sensitively, timely and accurately identified, so that the clinical medical safety quality can be improved, and the perioperative prognosis of patients can be improved.

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 complex dielectric constant measuring device, which comprises a clamp (1), a first measuring plate (2), a second measuring plate (3) and an impedance analyzer (4), and is characterized in that the clamp (1) is used for controlling the distance between the first measuring plate (2) and the second measuring plate (3); and the first measuring plate (2) and the second measuring plate (3) are electrically connected with the impedance analyzer (4) respectively. The invention also provides a method for measuring by using the complex dielectric constant measuring device. By using the complex dielectric constant measuring device provided by the invention, the complex dielectric constant of the aerosol generating matrix section of the heated cigarette product can be accurately measured, the aerosol generating matrix section of the heated cigarette product does not need to be subjected to sample preparation treatment such as tabletting, and various original physical and chemical parameters of the heated cigarette product are not changed; the detection result is more in line with the actual smoking performance of the heating cigarette product, and can adapt to the measurement requirements of heating cigarette products with different sizes.

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.

The invention discloses a state real-time monitoring method, system and equipment for blood dialysis, and aims to collect physiological parameters such as urea concentration, creatinine concentration, potassium concentration, weight and body fluid quantity of a dialysate in real time through multi-sensor equipment, and perform data analysis and prediction in combination with a machine learning model. Continuous monitoring and abnormal early warning of the state of a dialyzer in the dialysis process are achieved. The system comprises an online blood analyzer, an electronic weighing scale, a biological impedance analyzer and a central intelligent device, and efficient data transmission and processing are realized through a data transmission interface. If it is detected that the physiological parameters exceed the safety threshold value, the system automatically triggers early warning and informs medical staff, so that the safety and effectiveness of treatment are improved.

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 present invention provides a method for determining the working power limit of a resonant piezoelectric transducer by using an overheating warning mechanism, including measuring the resonant frequency of the piezoelectric transducer by an impedance analyzer, monitoring the input power in real time by building a piezoelectric transducer power monitoring system, and using the deviation and relative change rate of the temperature at the center and edge of the piezoelectric ceramic, a functional element of the piezoelectric transducer, to achieve a warning of the working power limit. The present invention can use temperature to give a piezoelectric transducer an overheating warning, and then determine the maximum working power and working time of the piezoelectric transducer, and has the advantages of low equipment requirements, simple methods, and a wide range of applications.

1. The name of the product of this design: battery stack impedance analyzer. 2. Purpose of this design product: to provide a test channel and communication interface for testing the impedance of the battery stack and to integrate the battery stack load. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention provides an auxiliary measurement device of a magnetic coupling mechanism. The auxiliary measurement device comprises the magnetic coupling mechanism, a logic switching device and an impedance analyzer. Wherein the logic switch device is electrically connected with the magnetic coupling mechanism, and the impedance analyzer is electrically connected with the logic switch device. On-off of the magnetic coupling mechanism and the impedance analyzer is controlled through the logic switch device, the flow direction of current can be changed, rapid switching of different testing schemes is achieved, the impedance analyzer is further used for measuring the mutual inductance value and the resistance value of the magnetic coupling mechanism, and rapid, accurate and batch measurement of self inductance, internal resistance and mutual inductance of the double-coil mechanism magnetic coupling mechanism is completed. According to the measurement auxiliary device of the magnetic coupling mechanism, the operation difficulty and workload of batch mutual inductance testing are greatly reduced, meanwhile, the batch testing precision and the data reliability are improved, and the measurement auxiliary device has the advantages of being high in adaptability, wide in application range, easy to operate and low in cost.

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.

The invention provides a thrombus real-time monitoring system for in-vitro life support equipment. The thrombus real-time monitoring system comprises an impedance micro screen, an anti-blocking loop shaped like a Chinese character'ri ', an impedance analyzer and a PC. The combination and distribution mode of macroscopic flow holes and microcosmic capturing holes in the impedance micro screen is set, the macroscopic flow holes are used for improving the overall flow, and the microcosmic capturing holes are used for effectively capturing thrombus microemboli; under the condition that the overall working flow function of a circulation loop is not affected, combination between high flux and effective microembolus capture is achieved, and integration in an extracorporeal circulation system is facilitated; meanwhile, the micro matrix electrode is integrated on the composite aperture impedance micro sieve, quantitative thrombus bioelectrical impedance spectroscopy signal measurement can be achieved while thrombus microemboli are captured, quantitative analysis and determination of the thrombus microemboli content are achieved, and therefore real-time monitoring of the thrombus generation state is 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.