10 results about "Electrode impedance" patented technology

Embodiments disclosed include an electrosurgical system as well as a method. The electrosurgical system and the method (are configured to determine an electrode type (T1, T2, T3) of a neutral electrode by applying an alternating measurement signal to the neutral electrode at least at two different measurement frequencies (f1, f2). At each measurement frequency (f1, f2) an impedance absolute value (ZNabs) or a phase value (φ) or both is determined for the neutral electrode impedance (ZN) of neutral electrode. When at least one impedance absolute value (ZNabs) and at least one phase value (φ) is determined, and based on the at least one impedance absolute value (ZNabs) and the at least one phase value (φ), the electrode type (T1, T2, T3) of the connected neutral electrode is determined by comparison with known comparison values for the at least one impedance absolute value (ZNabs) and the at least one phase value (φ).

The application discloses a nerve microelectrode with long-term biocompatibility maintenance and a preparation method thereof. Most of the existing nerve electrodes have only a few recording points, so that the spatial resolution is low; the flexible electrode implantation has a large width, so that more trauma areas are caused. The nerve microelectrode with long-term biocompatibility maintenance for nerve recording comprises a recording layer, an electrochemical modification layer and a biocompatibility coating. The preparation of the biocompatibility polypeptide coating is realized by adopting a MEMS compatible PVD technology, so that the preparation efficiency and consistency of the electrode are greatly improved. The biocompatibility coating which completely covers the electrode points and the whole probe surface has a special porous nanofiber structure and can realize ion conduction. The electrode point recording performance is improved by using the electrochemical modification layer, so that the biocompatibility is improved without seriously affecting the electrode impedance and recording capacity.

The application discloses an integrated filtering and ozone disinfection double-mode water tank water outlet device, which comprises a base, a inner sleeve fixed in the base, an ozone generator fixed in the inner sleeve, a shell fixedly connected to the top of the inner sleeve, a filter element arranged in the shell, a cover covering the shell, a threaded sleeve extending upwards and downwards and fixed to the lower end of the base, and a water inlet pipe and a water outlet pipe both extending upwards and downwards and penetrating through the threaded sleeve. The water tank water outlet device can be directly installed in the original washing liquid hole of the water tank, realizes the integration of filtering and ozone disinfection double functions without changing the original cold and hot water faucet layout, the metal-based BDD electrode has extremely small resistance, which is beneficial to reducing the overall electrode impedance, the metal-based BDD electrode has a stable passivation layer and can keep low background current for a long time, and the metal-based BDD electrode has a wide current use range and can perform long-term and high-efficiency electro-oxidation reaction.

This invention discloses a method for monitoring the symmetrical internal resistance of electrode sheets to assess battery cell performance, relating to the field of battery technology. The method is used to test the symmetrical internal resistance of electrode sheets after rolling. The process includes sequentially coating, drying, rolling, and die-cutting electrode sheets to prepare electrodes for stacked battery cells. Each electrode sheet includes tabs extending from a current collector. The electrode sheets and separator are placed in a preset dry environment and immersed in electrolyte for a preset time. The electrode sheets and separator are alternately stacked to form an electrode assembly. The electrode assembly is flattened. Probes are then used to contact the tabs of two adjacent electrode sheets to measure and obtain the resistance between the electrode sheets. The method provided by this invention can quickly and accurately detect the symmetrical internal resistance of electrode sheets after rolling and before cell assembly, enabling early identification of abnormal electrode impedance, effectively avoiding the risk of batch battery scrap, and reducing production costs. Simultaneously, it can provide data support for optimizing coating processes, improving cell consistency and product reliability.

A method is provided for measuring the impedance of a pH sensor electrode. The method includes applying a positive voltage pulse to the pH electrode and taking a plurality of samples of the sensor voltage response and, from those samples, estimating the impedance of the sensor electrode. Then, a negative voltage pulse width is dynamically adjusted to cancel out the induced charges from the positive voltage on the pH sensor so that the sensor quickly recovers to read subsequent media pH levels.

This utility model discloses an electrode attachment device for a portable fish freshness detector, belonging to the field of marine resource monitoring technology. It includes an attachment module and an electrode module. The attachment module adopts a cylindrical structure with protrusions and is covered by an outer sleeve. Buffer adjustment is achieved through the cooperation of the protrusions and damping blocks. The electrode module is fixed to the attachment module via a threaded connection and can integrate multiple sensors such as pH-sensitive electrodes and impedance measurement electrodes. The electrode module adopts a composite probe design, including a micro-puncture section and a contact sensing section, and is equipped with a pressure sensor. Multiple electrodes can be arranged in parallel or concentric arrays, with spacing adjusted using a magnetic slider adjustment mechanism. This utility model's electrode attachment device has functions such as buffer protection, multi-parameter detection, and pressure monitoring, and can adapt to different fish detection needs, significantly improving the accuracy and convenience of fish freshness detection.

This invention provides a reference electrode for use in an electrode assembly. The electrode assembly includes an electrode sheet and a reference electrode. The reference electrode includes: a metal mesh; and an active coating coated on the surface of the metal mesh, containing lithium titanate or lithium iron phosphate as the main component. The areal weight of the main component in the active coating is no more than 1 / 10 of the areal weight of the active material in the electrode sheet. Using the above technical solution, the uniformity of current distribution can be significantly improved, the electrode impedance can be greatly reduced, thereby effectively improving the testing accuracy and avoiding signal distortion. This invention also provides a three-electrode battery and a method for preparing a three-electrode battery.

This invention discloses a real-time optimization control method for an underground coalbed methane SOFC combined heat and power system. The method utilizes a distributed fiber optic temperature measurement network and electrochemical impedance spectroscopy to acquire real-time three-dimensional temperature field distribution data and electrode impedance data within the fuel cell stack. Based on this, a dual-channel hybrid neural network is used to fuse temporal and transient characteristics, outputting a quantitative carbon deposition risk index and a sulfur poisoning risk index to characterize the electrode health status. This dynamically corrects the anode kinetics and mass transfer parameters in the digital twin model. With system efficiency, temperature uniformity, and health indicators as optimization objectives, a hierarchical collaborative control architecture is employed for multi-objective rolling optimization to generate optimal operating setpoints. Finally, the fuel pretreatment, fuel cell stack operation, and waste heat recovery processes are coordinated and regulated. This invention also supports incremental model updates and predictive maintenance warnings. This method improves system efficiency, safety, and lifespan, and is applicable to SOFC combined heat and power scenarios using complex fuels such as sulfur-containing coalbed methane.

A computer-implemented method includes measuring a first electrode impedance signal associated with a first electrode using a first sensing channel. The method also includes measuring a second electrode impedance signal associated with at least a second and third electrode using a second sensing channel, where the second and third electrodes are electrically connected to each other but not to the first electrode. The method further includes assessing tissue contact / proximity based on the first electrode impedance signal and the second electrode impedance signal.