131 results about "Bio impedance" patented technology

The invention relates to the technical field of bio-electricity signal acquisition, and particularly discloses a multi-channel bio-electricity signal acquisition system and a multi-channel bio-electricity signal acquisition method.The multi-channel bio-electricity signal acquisition system comprises a bio-electricity signal acquisition unit and a data processing unit; the data processing unit is used for compensating the original electrophysiological signals according to the real-time impedance value transmitted by the analog-to-digital conversion unit, performing primary screening on the original bio-electricity signals through the lowest quality threshold value, and performing primary compensation on the original bio-electricity signals according to the real-time impedance value, the standard impedance value and the breathing phase; according to the method, more flexible quality requirement setting is realized, the quality threshold setting difficulty is reduced, secondary screening is performed on the corrected bio-electricity signals through the highest quality threshold, and secondary compensation is performed on the corrected bio-electricity signals by adopting the LSTM network, so that the influence of bio-impedance fluctuation on the bio-electricity signals is reduced, and the quality of the bio-electricity signals is improved. And the acquisition quality and stability of the bio-electricity signals are improved.

The invention belongs to the technical field of food preservation, and particularly relates to a field intensity adjusting method based on electrostatic preservation. According to the method, a dynamic field intensity adjusting instruction is generated by obtaining biological impedance data of a to-be-preserved object, the phase difference and the voltage amplitude of the multi-electrode plate array are controlled to form a three-dimensional rotating electric field, and space uniform distribution of field intensity is achieved. The ozone generation module operates independently of an electric field, and the ozone concentration is dynamically adjusted through an ultraviolet light source. A high-frequency short-pulse mode or a low-frequency long-pulse mode is matched according to the type of the object, and the antibacterial and fresh-keeping effects are optimized. Self-adaptive field intensity adjustment is achieved through biological impedance feedback, the three-dimensional rotating electric field and ozone decoupling control are combined, the freshness retaining uniformity and safety are improved, the shelf life is prolonged, and energy consumption is reduced.

The invention relates to a non-invasive cardiac output function detection method and device, and belongs to the technical field of biological measurement. According to the method, on the basis of pulse wave related data, electrocardiowave related data and biological impedance and biological reactance related data which are obtained through detection, the bioelectrical impedance method is adopted to calculate and obtain the cardiac output of the bioelectrical impedance method, and the pulse wave method is adopted to calculate and obtain the cardiac output of the pulse wave method. And according to the impedance signal confidence coefficient and the pulse wave signal confidence coefficient, carrying out weighted average on the cardiac output of the bioelectrical impedance method and the cardiac output of the pulse wave method, and taking the weighted average as a cardiac output detection result. The detection device comprises a pulse wave detection system, an electrocardiogram detection system, a biological impedance and reactance detection system and a host used for data processing and result display. The reliability of cardiac output detection is remarkably improved while portability is guaranteed, and accurate, continuous and portable detection of non-invasive cardiac output is achieved.

According to the intelligent voice broadcast system and method for the elevator, elevator car environment data are collected in real time through a multi-source heterogeneous sensor set, and passenger density distribution and movement tracks are calculated through fusion of a millimeter wave radar and a 3D visual sensor; physiological features of a handrail contact area are detected through a biological impedance sensor so as to judge the health state of a passenger, and the current signal-to-noise ratio is dynamically calculated and the voice frequency band is optimized through an environment noise analysis module. Therefore, by constructing a technical system of'multi-modal perception-edge intelligent decision-cross-modal interaction 'and adopting innovative means such as millimeter-wave radar and biological impedance fusion sensing, deep reinforcement learning of a dynamic strategy and a phased array directional sound field, the problems of broadcast stiffness, poor scene adaptability and privacy potential safety hazards are solved. According to the system and method, accurate passenger feature recognition, dynamic voice content generation and multi-channel collaborative feedback are achieved through two-dimensional innovation, and the intelligent level and service efficiency of elevator voice interaction are improved.

The invention discloses a multi-mode health monitoring bracelet and a data processing method thereof. The multi-mode health monitoring bracelet is mainly composed of a dial plate body, a flexible substrate and a wrist strap assembly. An annular detection module is integrated in the dial plate body, 24 piezoresistive pulse condition sensors of an inner ring of the annular detection module are arranged according to cun-guan-chi positions to collect pulse conditions, and PPG sensors and biological impedance electrodes are alternately arranged on an outer ring of the annular detection module to be used for western medicine physical sign monitoring. A multi-layer flexible circuit is embedded in the flexible substrate, and the wrist strap assembly comprises a nickel-titanium alloy framework and a pneumatic micro-capsule. An edge calculation module is adopted for data processing, a dynamic baseline calibration algorithm is carried, and a threshold value is adjusted according to data and individual characteristics of a user in the first 72 hours. According to the system, traditional Chinese medicine pulse condition digitization and western medicine physical sign continuous monitoring can be synchronously achieved, the problems that a traditional device is single in function, delayed in data processing, fixed in health baseline and the like are solved, the system has the advantages of multi-mode monitoring, real-time response, personalized adaptation, comfortable wearing, accurate signals and the like, and comprehensive and accurate health monitoring and service are provided for a user.

The invention provides a multifunctional intelligent anti-thrombus PICC (peripherally inserted central catheter) for tumor chemotherapy, which comprises a catheter body, a catheter tip, a main infusion cavity, a first auxiliary cavity and a second auxiliary cavity, and the first auxiliary cavity and the second auxiliary cavity are arranged around the main infusion cavity to form a spiral structure; a micro pressure sensor array is embedded in the pipe wall of the first auxiliary cavity; a biological impedance measuring electrode pair is embedded in the pipe wall of the second auxiliary cavity; and the micro pressure sensor array, the biological impedance measuring electrode pair, the micro ultrasonic transducer and the temperature sensor are connected with a processor. According to the method, active thrombus prevention is achieved, passive treatment is changed into active prevention through a triple mechanism, and the thrombus occurrence rate is greatly reduced; meanwhile, the tube body is formed by mutually winding, fusing and extruding three independent cavities (a main infusion cavity, a first auxiliary cavity and a second auxiliary cavity) like a DNA double helix (triple helix is provided herein); and the mechanical stimulation and damage to the inner wall of the blood vessel are reduced.

The invention provides a patch type thrombus monitoring and NO release closed-loop system for treating venous thrombosis, which comprises a flexible patch substrate on which a sensor module is integrated, and the sensor module comprises a blood flow velocity sensor, a biological impedance sensor, an acceleration sensor and a temperature sensor, the acquisition units are respectively used for acquiring blood flow velocity v at a target vein, related parameters of vascular resistance R, limb movement states and skin temperature of a patch area; the NO release module is used for releasing NO to act on the venous thrombosis part; the control module comprises a signal processing unit and a control unit and is used for receiving the signal output by the sensor module and operating a closed-loop control algorithm to generate an NO release control instruction; and the power supply module provides electric energy for the sensor module, the control module and the NO release module. The invention provides a patch type closed-loop system which integrates thrombus multi-mode monitoring, decision making, NO release assisting and treatment mode self-adaptive switching.

Attachment means enable electrodes to apply an alternating current to the skin of a user and measure voltage across the skin. The data allows a signal indicative of the respiration of the user to be d

A bioimpedance measurement circuit for determining a corrected body impedance is disclosed having a set of terminals, a control circuit (200), an evaluation circuit (300), and a signal processing circuit (400). The control circuit (200) is configured to control: a measurement of body impedance (Zb) in which a stimulation current (iin) is applied through the first terminal and the second terminal, and an input voltage (vin) between the third terminal and the fourth terminal is measured; measuring a first body part impedance (Zw), in which a stimulation current (iin) is applied through the first terminal and the third terminal, and an input voltage (vin) between the first terminal and the third terminal is measured; and measurement of a second body part impedance (Zf), in which the stimulation current (iin) is applied through the second terminal and the fourth terminal, and the input voltage (vin) between the second terminal and the fourth terminal is measured. The signal processing circuit (400) is configured to determine an error impedance (Zerr) based on a measured first body part impedance (Zw), a measured second body part impedance (Zf), a stored first parasitic body part impedance (Zwp), a stored second parasitic body part impedance (Zf), and a stored input impedance (Zin), and determining a corrected body impedance (Zbcorr) based on the measured body impedance (Zb) and the error impedance (Zerr).

This disclosure describes systems, apparatuses, and methods that utilize electric field sensing in an antenna topology. In some embodiments, the systems, apparatuses, and methods use a sensing modality, such as bio-impedance sensing, to detect and / or determine one or more user activities. The bio-impedance sensing can be used for held-object or touched-object recognition, gesture input recognition (e.g., recognition of one-handed gestures, two-handed gestures, etc.), user interface (UI) interaction by utilizing electrically passive components, and / or biometric identification and / or authentication.

The invention discloses an intelligent contrast agent exosmosis prevention monitoring device, and relates to the technical field of medical instruments, in particular to an intelligent contrast agent exosmosis prevention monitoring device which comprises a flexible substrate. A biological impedance sensor, a temperature sensor and a micro pressure sensor are integrated on the flexible substrate and used for monitoring tissue impedance, skin temperature and tissue pressure changes of an injection part in real time in a multi-parameter mode. The device is internally provided with a signal conditioning circuit for processing sensor signals, and data are sent to the high-pressure injector through the wireless communication module. According to the method, the risk of exosmosis of the contrast agent can be recognized in an early stage through multi-parameter fusion analysis, and the instruction is automatically sent to the high-pressure injector to adjust or stop injection when the risk is abnormal, so that closed-loop feedback from monitoring to control is realized, and the injection safety is effectively improved.

The invention relates to the technical field of medical rehabilitation treatment, and discloses a self-adaptive functional electrical stimulation system based on bimodal feedback and a control method. The system comprises a main control module, a stimulation output module, an electroneurographic signal detection module, a biological impedance test module and a safety isolation module. The main control module comprises a safety current determination unit, a stimulation control unit and a dynamic calibration unit which are respectively used for determining an individualized initial safety current based on neural action potential feedback, controlling treatment stimulation output and dynamically calibrating a safety current upper limit according to biological impedance change before and after stimulation. According to the invention, through bimodal feedback of electroneurographic signals and biological impedance, individualized calibration and real-time dynamic optimization of stimulation parameters are realized, and the problem that the treatment effect and safety are difficult to guarantee due to the fact that traditional functional electrical stimulation depends on experience setting and lacks physiological feedback is solved; and the accuracy, safety and adaptability of rehabilitation treatment are remarkably improved.

The invention discloses an electrosurgical radio frequency inverter based on model predictive control and a frequency conversion control method thereof, and the method comprises the steps: building a discrete output voltage prediction model based on a topological structure of the electrosurgical radio frequency inverter, and judging a switching frequency switching point and voltage peak output power through single sampling period iterative calculation. Constructing an output power prediction model; obtaining instantaneous prediction output power and theoretical reference output power obtained by real-time sampling and calculation when the output voltage is changed to a periodic peak value, and constructing a model prediction control evaluation function; according to the evaluation function, real-time voltage sampling and multi-frequency iteration prediction are combined with a set control target, the switching frequency of the radio frequency inverter is predicted and updated in real time, and constant-power frequency conversion control over the radio frequency inverter is achieved by continuously obtaining the control quantity at the next moment. The system can adapt to constant power output of a power supply under biological impedance change, can predict and control constant power output of an electrosurgical inverter in real time based on real-time updating of switching frequency, has good dynamic response performance, guarantees high efficiency and safety of clinical operations, and can be applied to various electrosurgical working platforms.

The invention relates to the technical field of medical monitoring equipment, in particular to an intelligent drainage monitoring system and method after a hepatotomy based on multi-modal sensing, and the system comprises a sensing data collection module, a signal processing module, a data fusion analysis module and an abnormity recognition early warning module. The sensing data acquisition module comprehensively acquires pressure, component and diffusion state data of drainage liquid by utilizing an optical fiber pressure sensor array, a micro spectral analysis device and a biological impedance sensor, the signal processing module converts sensing data into digital signals, and the data fusion analysis module performs fusion analysis on the drainage liquid based on the signals. According to the system, the content of bilirubin and hemoglobin in drainage liquid and the diffusion state of the bilirubin and hemoglobin in the abdominal cavity are recognized and comprehensively analyzed, the abnormity recognition and early warning module compares an analysis result with a preset normal index, the abnormal condition is determined, an early warning signal is generated, the intelligence and accuracy of drainage management are effectively improved, and the working efficiency is improved. Postoperative complications can be reduced, and the rehabilitation quality of a patient can be improved.

The invention provides a neurosurgery postoperative aspiration risk grading detection head band and a neurosurgery postoperative aspiration risk grading detection system based on impedance sensing, and relates to the technical field of medical detection, the neurosurgery postoperative aspiration risk grading detection head band comprises a band body, a flexible electrode array, a signal processing unit and a wireless transmission chip, the flexible electrode array is integrated on the inner side of the band body and is used for collecting biological impedance signals of anterior cervical muscle groups; the signal processing unit is electrically connected with the flexible electrode array and is used for preprocessing and demodulating the impedance signal; the wireless transmission chip is connected with the signal processing unit and is used for uploading the processed signal to the cloud control platform; the flexible electrode array is integrated on the belt body, non-invasive and comfortable continuous monitoring is achieved, the electrodes are attached to the curved surface of the anterior cervical muscle group, stimulation of traditional invasive electrodes to the skin is avoided, the belt body is designed through elastic spandex, use is convenient, the device adapts to the head circumference of different patients, and the comfort of long-term wearing is ensured.

The application discloses a physicochemical index detection method for food can production and relates to the technical field of food detection. The method comprises the following steps: deploying a near-infrared spectrum, eddy current electromagnetic and biological impedance three-mode sensing unit in a ring arrangement, and non-contact collecting can body reflection spectrum, eddy current loss and complex impedance response signals; extracting sulfur dioxide, heavy metal and microbial characteristic parameters through wavelet packet decomposition, Hilbert transform and principal component analysis; constructing a three-element coupling correction equation group to cross correct original data and output accurate detection results; and integrating a self-calibration mechanism and an abnormal product automatic sorting function. The application realizes nondestructive, efficient and multi-index parallel detection by constructing four core technical systems, namely, multi-modal synchronous acquisition, cross-modal feature coupling, dynamic threshold decision and online self-calibration, has stable precision and reduces costs by 60%, and meets the real-time quality control and traceability requirements of a full-automatic production line.

A bio-impedance measurement device includes a signal generator, configured to input a probing signal having a first frequency and an over-sampling pattern into a bio-impedance; a receiver, configured to receive a first response signal related to the probing signal from the bio-impedance; a demodulation circuit, coupled to the receiver, configured to generate a first in-phase signal and a first quadrature-phase signal according to the first response signal; and a processor, coupled to the signal generator and the demodulation circuit, configured to analyze the probing signal, the first in-phase signal and the first quadrature-phase signal to determine a bio-impedance value of the bio-impedance.

This invention discloses an intelligent psychological guidance system for harmonizing the Qi of the internal organs based on TCM emotional differentiation, belonging to the field of medical electronic equipment. The system includes a multi-node physiological signal acquisition module, a central control and data processing module, and an acoustic intervention output module. The system synchronously acquires multi-channel bioimpedance, volumetric pulse wave, and electrocardiogram signals, extracts pulse wave conduction time and local blood perfusion index, constructs Qi characteristic parameters, and maps them to generate emotional tags. The central control module locks the target resonance unlocking frequency according to the tags, modulates low-frequency vibrations with reference audio to synthesize a multimodal signal, and further combines physiological pulse transmission delay to perform phase compensation, controlling the precise output of the intervention signal during ventricular diastole. Steady-state determination and closed-loop tracking are performed based on the dynamic gradient of impedance variance. This invention achieves objective quantification of TCM differentiation and ensures high-precision physical alignment between intervention energy and the hemodynamic state of the internal organs.

Provided is a biological information providing apparatus comprising a potential signal measuring unit which measures a potential signal through a pair of electrodes in contact with a living body, a bioimpedance signal measuring unit which outputs a bioimpedance signal according to the bioimpedance, an adaptive filter having a variable coefficient filtering unit which generates a control signal, a biological information signal output unit which calculates a biological information signal, and a coefficient adjusting unit which adjusts the coefficient such that a signal correlated to the bioimpedance signal included in the biological information signal is reduced, and a filter control unit which controls the coefficient adjusting unit such that a convergence speed of the adaptive filter becomes faster when the potential signal or the bioimpedance signal satisfies a predetermined condition.

The invention provides a local muscle group fat rate detection method and system and a medium, and the method comprises the steps: enabling an electrode plate to be attached to a target local muscle group part of a human body, so as to form a local electrode region corresponding to the target local muscle group. And controlling a resistance detection module to inject a detection signal with preset frequency and current amplitude into the local electrode area, and synchronously acquiring biological impedance data of the local electrode area. And carrying out filtering processing and temperature compensation processing on the collected biological impedance data to obtain a processed target impedance value. And substituting the target impedance value and at least one of the height, the weight and the age of the user into a segmented body fat rate calculation model corresponding to the target local muscle group to obtain a body fat rate detection result of the target local muscle group. Through the structure, the body fat rate of the local muscle group is obtained.

An electronic device is disclosed. The electronic device includes: a first electrode body in contact with a body of a user and including first and second current electrodes symmetrically arranged in a first direction and first and second voltage electrodes symmetrically arranged in the first direction; a second electrode body in contact with the body of the user and including a third current electrode and a fourth current electrode symmetrically arranged in a second direction and a third voltage electrode and a fourth voltage electrode symmetrically arranged in the second direction; and at least one processor obtaining a first bio-impedance through the first electrode body, obtaining a second bio-impedance through the second electrode body, identifying one of the first bio-impedance and the second bio-impedance based on a phase of each of the first bio-impedance and the second bio-impedance, the total amount of body water of the user is obtained by using the identified bioimpedance, and the obtained total amount of body water is provided.

1. The name of the product of this design: Bioimpedance Tomography Device. 2. Purpose of the product of this design: to perform tomographic imaging based on the biological impedance of the human body. 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 application discloses an iridium oxide modified fluorine-doped tin oxide electrode and a preparation method and application thereof. The electrode comprises a light-transmitting fluorine-doped tin oxide conductive glass substrate and an in-situ attached iridium oxide nano-modified layer. The preparation method comprises the following steps: preparation and aging of a precursor solution, alternating current electrochemical deposition, annealing and cleaning, and laser patterning treatment. The application further discloses a cell impedance sensor organ chip system comprising the electrode and application of the system in in-vitro drug screening. The application utilizes the low cost and light-transmitting property of the fluorine-doped tin oxide and the excellent charge injection capacity of the alternating current deposited iridium oxide nano layer to greatly reduce the interface impedance. The scheme meets the in-situ optical observation, realizes the high-sensitivity biological impedance monitoring comparable to gold electrodes, effectively solves the problems of high cost and complex process of the existing organ chip electrode, and is very suitable for popularization and application as a disposable high-throughput consumable.

The present application discloses a wrist-worn device, including a processor, a rotating member, a conductive electrode, an electronic switch, an ECG sensor, a bio-impedance sensor, and a position detection sensor. The processor is configured to: determine whether a body composition detection instruction input by a user is received; determine whether the rotating member rotates to a preset position according to data collected by the position detection sensor; if the body composition detection instruction input by the user is not received and the rotating member rotates to the preset position, control the electronic switch to connect the conductive electrode to the ECG sensor, and use the ECG sensor to collect ECG data through the conductive electrode. The present application can improve the convenience of the ECG data collection process. The present application also discloses a method for collecting physical sign data, which has the above beneficial effects.

A bioimpedance measuring device for measuring breast tissue is provided, comprising a control unit and at least one measurement applicator having at least four contact electrodes connected or connectable to the control unit via electrical wiring, wherein the control unit is configured to generate and output an alternating current signal to two of the at least four contact electrodes, causing the two contact electrodes to function as current electrodes, and further configured to receive an alternating voltage signal between two of the at least four contact electrodes, causing them to function as voltage electrodes, wherein the at least two contact electrodes that function as voltage electrodes do not simultaneously function as current electrodes.

A personal vaping device (“PVD”) for age authenticated vaping is configured to read the thumbprint of an active user of the vaping device and, essentially simultaneously, perform a bioimpedance analysis (“BIA”) to measure a bioimpedance signature of the active user. The combination of the user's thumbprint with the bioimpedance signature defines a unique identity data combination for the user that can be compared to stored identity data combinations of authorized users. If the identity data combination of the active user matches, within a statistical confidence level, a stored identity data combination of an authorized user, the vaping device “unlocks” its heating chamber such that power is supplied to the coil / heating element for vaporizing e-juice.

A circuit for measuring a bioimpedance (10) comprises an electrode arrangement (100) for attachment to a body, an evaluation circuit (300) for determining a real part (I) and an imaginary part (Q) of a bioimpedance (BIOZ) of the body as a function of a stimulus current (iin) applied to the body and an input voltage (vin) of the evaluation circuit (300). A signal processing circuit (400) is configured to determine a corrected value of the bioimpedance by calculating a corrected real part (Icorr) of the bioimpedance (BIOZ) as a function of a derivative (dI) of the real part (I) of the bioimpedance (BIOZ) and a corrected imaginary part (Qcorr) of the bioimpedance (BIOZ) as a function of the imaginary part (Q) and a second imaginary part (Q3) of the bioimpedance determined by the evaluation circuit (300) at different measurement frequencies (ω3, F).

The application discloses a kind of cosmetic instrument control method and system, specifically related to the field of cosmetic instrument intelligent equipment, including the following steps: before starting microneedle driving mechanism, whether the treatment head is formed effective electrical contact with skin by contact detection module is judged;After confirming that there is effective electrical contact, voltage signal and current signal in microneedle loop are collected in real time, and the biological impedance value of current skin is calculated according to the voltage signal and the current signal;The attitude angle of the cosmetic instrument relative to the surface of skin is obtained by built-in inertial sensor;The application cooperates with the main controller by contact detection module, voltage / current sampling circuit, inertial sensor and device attitude angle, and biological impedance value, and three are used as joint determination condition: only when contact is effective, impedance is in preset safety interval and attitude angle is less than threshold value, maintain electric pulse output;Any condition fails, and output is terminated and graded response is executed.

The invention provides a blood pressure monitoring method and system. The method comprises the following steps: acquiring an original biological impedance signal of a user; performing scene recognition according to the original biological impedance signal; building a dosage suggestion model according to the scene recognition result to output dosage suggestions in the morning of the next day; estimating a blood pressure value according to the original bioimpedance signal; and performing blood pressure early warning according to the blood pressure value and the scene recognition result. The next day morning administration dosage suggestion and the blood pressure early warning can be combined with the current scene, the blood pressure feature analysis accuracy can be improved, the more accurate administration dosage suggestion can be provided, and model errors and early warning misinformation caused by scene-free distinguishing are avoided.

The invention provides a dynamic pulse magnetic field periorbital positioning method for simulating traditional Chinese medicine massage manipulation, which comprises the following steps: embedding a plurality of micro electromagnetic coils in an eyeshade, and performing spatial arrangement according to periorbital acupoint dissection positioning; multi-coil independent dynamic control is realized through an MCU and a driving circuit, and self-adaptive optimization is performed on magnetic field excitation parameters in combination with bioimpedance data acquired in real time and a machine learning algorithm; the multi-coil collaborative magnetic field focusing, intelligent regulation and control based on biological impedance feedback and a personalized parameter database are adopted to realize dynamic rotary magnetic field stimulation on a target acupuncture point, so that the precision and pertinence of magnetic field distribution are improved, meanwhile, the stimulation safety, comfort and personalized adaptive capacity are enhanced, and the simulated kneading curative effect is remarkably optimized.