58 results about "Channel electrode" patented technology

Generally described, one or more aspects of the present disclosure relate to methods, systems, and devices related to pre-straining bare lanes of a multilane electrode with a system for calendering a multilane electrode including a pre-strain roll device including a plurality of pre-strain rollers and a pressure roller forming a pre-strain nib and a calender roll device comprising a pair of calendering rollers forming a calendering nip positioned downstream from the pre-strain roll device.

The invention provides an information processing method and system based on a brain-computer interface, and belongs to the technical field of information processing.The method comprises the steps that brain wave signals of a user are collected through a multi-channel electrode; based on STFT, DWT and SVM models, feature extraction and pattern recognition are carried out on the brain wave signals, and control instructions corresponding to the brain wave signals are generated; and controlling the rehabilitation training equipment based on the control instruction to obtain control feedback corresponding to the brain wave signal. According to the information processing method and system based on the brain-computer interface, the signal discrimination robustness can be effectively improved, and the stability and generalizability of the system under individual differences of different patients and environmental interference are guaranteed.

The application discloses a preparation method of a flexible active myoelectric electrode array structure and relates to the field of flexible electronics and active electrode preparation; the structure comprises: a plurality of active electrodes; the plurality of active electrodes are arranged in a horizontal-longitudinal matrix mode; each active electrode comprises: a flexible substrate and an active flexible amplification electrode arranged on the flexible substrate; the active flexible amplification electrode comprises an electrode and a common-source amplification circuit; the electrode and the common-source amplification circuit are in one-to-one correspondence; the electrode and the common-source amplification circuit are connected; the structure realizes synchronous collection of surface myoelectric signals by multiple channels, the flexible substrate enhances the wearability of the electrode, the differential structure, that is, the common-source amplification circuit can improve the interference of common-mode signals, reduce the introduction of noise, improve the signal-to-noise ratio of myoelectric signals, and reduce signal crosstalk between different channels.

The invention discloses a cell sensor based on a four-channel electrode device and application of the cell sensor in pathogenic bacterium detection, and belongs to the technical field of analysis and detection. The cell sensor is formed by combining HEK 293 / hNAIP-NLRC4 cells serving as a recognition element and a ready-to-use cell culture paper chip serving as a carrier with a four-channel electrode device with a cell culture pool. The sensor constructed by taking HEK 293 / hNAIP-NLRC4 cells as a recognition element is high in sensitivity, can distinguish escherichia coli pathogenic bacteria with T3SS from escherichia coli non-pathogenic bacteria without T3SS, specifically perceives various pathogenic bacteria with T3SS, specifically recognizes non-targeted food-borne pathogenic bacteria, and provides a new thought for risk detection and research of unknown bacteria in food.

This invention discloses a flexible multichannel multilayer electrode, its fabrication method, and an electromyography (EMG) signal acquisition device. The fabrication method of the flexible multichannel multilayer electrode includes the following steps: etching and cleaning a silicon wafer; preparing an AgNW / NG solution as a conductive material and using SEBS powder to prepare an elastic substrate; fabricating a signal acquisition layer using the silicon wafer, conductive material, and SEBS powder; fabricating a wire shielding layer using the silicon wafer and SEBS powder; and fabricating an encapsulation layer and an interference signal shielding layer using the silicon wafer, conductive material, and SEBS powder; assembling the encapsulation layer, interference signal shielding layer, signal acquisition layer, and wire shielding layer sequentially from top to bottom, and connecting the signal acquisition layer to a flexible printed circuit board. This invention aims to solve the problems of high electrode impedance, low signal-to-noise ratio, and poor tensile strength of multichannel electrodes.

The present application relates to the technical field of environmental monitoring of oil pollution area, and particularly relates to a multi-channel parallel acquisition interwell three-dimensional resistivity monitoring system and method for oil storage area. The power supply, the host, the multi-channel parallel acquisition device and the four-pole AM-BN acquisition device are sequentially connected. The multi-channel parallel acquisition device comprises a multi-channel electrode conversion box, a plurality of potential channel sockets are arranged in the multi-channel electrode conversion box, the number of the potential channel sockets is the same as the number of probes, twenty-four potential channels are arranged in each potential channel socket, a relay and a current channel switch are arranged in each channel, one end of the relay is connected with a corresponding electrode on the resistivity probe, and the other end of the relay is connected with an acquisition module. The system has high acquisition efficiency, can better realize real-time monitoring of leakage, has high monitoring precision, can accurately identify small leakage in the oil storage area, and realizes remote in-situ monitoring of oil pollution area leakage.

The invention discloses a maternal and fetal electrocardio extraction method based on multi-task learning. The method comprises the steps that 1, a multi-channel electrode is used for collecting mixed electrocardio signals on the surface of the abdomen of a pregnant woman and preprocessing the mixed electrocardio signals; 2, extracting label signals required by training, and making a data set; 3, constructing a multi-task learning maternal and fetal electrocardiogram extraction network, and training a model by using a training data set in a data set; and 4, performing electrocardiogram extraction on the pregnant woman abdomen surface electrocardiogram signals by utilizing the trained model, and outputting maternal and fetal electrocardiogram waveforms and heart beat sequences thereof. The extraction precision of the maternal and fetal electrocardiosignals can be improved, and the electrocardiosignal waveform signal and the heart beat sequence thereof can be obtained at the same time.

The invention discloses a controlled-release PRP pelvic floor muscle repair system for a multi-channel electrode. The system comprises a plurality of controlled-release systems and a porous silica gel protective sleeve arranged on the outer sides of the controlled-release systems in a sleeving mode. The plurality of controlled release systems comprise a plurality of electrode probes and PRP controlled release functional layers which are respectively sleeved on the outer sides of the electrode probes and are matched with the electrode probes in shape; the PRP controlled-release functional layer comprises a porous matrix and a PRP adsorption layer coated on the porous matrix; the porous matrix comprises an anti-percolation membrane layer and a micron-scale or nano-scale fiber network carrier, and the micron-scale or nano-scale fiber network carrier is coated with the PRP adsorption layer; and the micron-scale or nano-scale fiber network carrier is subjected to alkali liquor treatment before the PRP adsorption layer is coated. According to the repair system, by designing a special carrier structure and a surface treatment process, efficient adsorption of PRP is achieved, mutual cooperation with electrical stimulation is achieved, precise aggregation of PRP and electrical stimulation trigger type controllable release are achieved, and the key problem of electrical stimulation and PRP collaborative treatment in the prior art is solved.

The present application relates to the technical field of fracture monitoring, and is a pulse fracturing active fracture monitoring method based on seismic-electric coupling, which comprises using a fracturing nipple excitation source as an active elastic wave source, receiving the electric signal generated by seismic-electric coupling by using a multi-channel electrode array arranged, adopting time-frequency analysis and fracture inversion based on a frequency domain template to realize inversion and visualized output of the existence, spatial position, trend and scale of the fracture. The present application excites a pulse by using a fracturing nipple, generates an elastic wave signal, emits an excitation current, enhances the intensity of the seismic-electric effect electric signal, analyzes the change of the electric field around the fracturing nipple, and thus realizes real-time active monitoring of the development and distribution of fracturing cracks and improves the accuracy and real-time performance of crack detection.

The present application relates to a kind of spinal cord epidural electrical stimulation electrode for rhesus monkey spinal cord injury repair and its preparation method, belong to medical instrument technical field.The electrode body includes composite flexible substrate;Composite flexible substrate includes insulating substrate layer, conductive layer and insulating protective layer arranged in sequence;Wherein, conductive layer is provided with multi-channel electrode site array;Multi-channel electrode site array is arranged into at least two columns along the length direction of composite flexible substrate, and each column includes multiple electrode sites;Micropore array is arranged in the first surface of electrode body;Wherein first surface is the contact surface for being contacted with rhesus monkey spinal cord;Micropore array includes multiple micropores, each micropore penetrates insulating protective layer, and micropore bottom end stops at the surface of conductive layer.The present application not only improves the electrode and spinal cord dura mater surface adhesion, also enhances the position stability of electrical stimulation site, guarantees the accuracy and reliability of long-term electrical stimulation effect.

The present application relates to a kind of microchannel electrode support and its preparation method and application, the electrode support is relatively provided with dense layer and porous layer along the thickness direction, microchannel is provided between the dense layer and porous layer, the microchannel extends from the dense layer to the porous layer direction;The microchannel is variable-diameter channel, its aperture gradually decreases from the dense layer to the porous layer along the extension direction.Pore size distribution of the electrode support is 0.5~40 μm, the thickness is 600~1500 μm, porosity is 30~70%.The microchannel electrode support is mainly prepared by phase inversion process, is formed by key steps such as solvent replacement, constant temperature drying and high-temperature calcination in turn.Compared with prior art, the microchannel electrode support of the present application maintains high porosity under high temperature conditions, so that fuel gas and oxygen can be quickly absorbed and released, thereby accelerating the chemical reaction rate, improve the working efficiency of SOFC / SOEC.

The multi-channel electrode tube 103 includes at least four deflection plates 300-307. Each of the deflection plates 300-307 is positioned opposite another deflection plate 300-307 across the path of the electron beam 102 passing through the multi-channel electrode tube 103. The voltage difference between the pair of deflection plates 300-307 positioned opposite each other across the path of the electron beam 102 is determined. Then, based on the voltage difference, the position of the electron beam 102 in the multi-channel electrode tube 103 is determined.

The present application relates to a kind of based on motor imagination trigger's electric stimulation synchronous closed loop multimodal neuroregulation system, belong to medical rehabilitation engineering and neural engineering technical field.The system includes: electroencephalogram signal acquisition and processing module, for real-time acquisition user sensory motor cortex electroencephalogram signal, and extract the event-related desynchronization features of motor imagination task in the electroencephalogram signal by time-frequency analysis model;Motor intention recognition and trigger module generates synchronous trigger signal;Functional electric stimulation module, through multi-channel electrode device drive surface electrode output electric stimulation pulse to target area, drive target action;Transcutaneous auricular vagus nerve electric stimulation module, output and motor intention duration synchronous stimulation pulse;Central control and synchronization module, for coordination control timing.Formed " intention recognition-synchronous control-assisted movement" complete closed loop, provides a kind of efficient, accurate, individualized neural engineering solution.

The invention provides a flow battery pressure drop calculation method and an applicable flow battery, the flow battery comprises an electrode and a flow channel region, the flow channel region is in direct contact with the electrode, the flow channel region comprises a flow channel and a flow channel rib, and the flow battery pressure drop calculation method comprises the following steps: presetting physical parameters of a test electrode; measuring the pressure drop of the test electrode, and recording the measured flow of the test electrode and the measured pressure drop corresponding to the measured flow; electrode physical property parameters are calculated according to the measured flow and the measured pressure drop; and calculating a flow channel electrode voltage drop, a flow channel rib electrode voltage drop and a flow channel voltage drop according to the electrode physical property parameters, and calculating the total voltage drop of the battery according to the flow channel electrode voltage drop, the flow channel rib electrode voltage drop and the flow channel voltage drop. The flow battery voltage drop calculation method and the applicable flow battery provided by the invention can accurately evaluate the voltage drop of the electric pile of the flow battery, and are beneficial to the structural optimization of the flow battery.

An indigo electrochemical reduction reactor and indigo electrochemical reduction reaction method using a micro-channel carbon felt electrode. A reaction device of the reactor comprises a cathode casing, an insulating gasket, a current collector, a micro-channel carbon felt electrode, a separator, an oxygen evolution electrode, an anode channel, and an anode casing. A micro-channel network for a cathode solution to flow is provided inside the micro-channel carbon felt electrode; the oxygen evolution electrode and the carbon felt channel electrode are arranged in parallel, and are separated by the separator therebetween; the current collector is closely attached to the outer surface of the micro-channel carbon felt electrode; the insulating gasket is closely attached to the outer surface of the current collector; the cathode casing is closely attached to the outer surface of the insulating gasket. Further provided in the present invention is an indigo electrochemical reduction reaction method based on the reactor. The present invention can implement direct electroreduction of indigo without a chemical reducing agent.

The invention relates to the technical field of monitoring, and discloses a carbon nanotube fiber-based multichannel electrode pool for neural stem cell culture and signal acquisition, the carbon nanotube fiber-based multichannel electrode pool comprises a baffle plate, the upper surface of the baffle plate is provided with a cell culture dish, the cell culture dish is internally provided with a cell culture pool, one side of the cell culture pool is provided with a separator plate, and the separator plate is provided with a carbon nanotube fiber. The upper surface of the baffle plate is provided with a terminal display screen, and the upper surface of the baffle plate is provided with a conductive contact. According to the invention, the electrode adopts the carbon nanotube fiber as a conductive material, the conductivity reaches 1000-1500S / cm, the conductive sensitivity is excellent, and the electric signal characteristics of neural stem cells can be accurately captured; the three conductive contacts arranged at equal intervals are in full contact with cell sap, an electric signal direct transmission mechanism is matched, the data error rate is smaller than or equal to + / -1.2%, compared with a traditional fluorescent dye method and a cell counting method, manual observation and counting errors are greatly reduced, and reliable data support is provided for cell viability evaluation.

The application belongs to the technical field of nanomaterials and biological analysis, and particularly relates to a ratio type photoelectrochemical analysis method based on multifunctional CeO2 / CdS and interface etching. First, a multifunctional CeO2 / CdS nanocomposite is synthesized by an in-situ growth method, and the nanocomposite has photoelectric properties of CdS and CeO2 peroxidase activity; second, a beacon antibody labeled with nanogold and glucose oxidase is prepared by an electrostatic adsorption method, a target protein, the beacon antibody and an antibody coated on an enzyme-labeled microplate are mixed and incubated to form an immune complex, and after glucose is added, H2O2 is generated by catalysis of the glucose oxidase on the beacon antibody; the generated H2O2 is catalyzed by CeO2 in the CeO2 / CdS nanocomposite to generate hydroxyl radicals, and in-situ etching of CdS in the electrode interface reduces the photocurrent, and a photocurrent intensity ratio (Iw / Ic) of a double-channel electrode has a linear relationship with the concentration of the target protein, so that quantitative analysis can be realized. The application has a sensitive response to the detection of proteins and has a fast detection speed.

The invention belongs to the technical field of flexible sensors, and particularly relates to a compound enzyme immobilized electrode material, a preparation method and flexible wearable equipment. The invention aims to provide a compound enzyme immobilized electrode, a preparation method and flexible wearable equipment. According to the compound enzyme immobilized electrode, an enzyme immobilization method of an ionic liquid gel microsphere and carbon nanotube composite system is adopted, and the problems that the enzyme activity retention rate is low, the service life is short, the conductive network structure is incomplete and the electron transfer efficiency is low can be solved; furthermore, the invention provides wearable equipment with a multi-channel electrode array and an independent signal acquisition structure, so that the problems of low system integration level and single detection function are solved; and a pluggable flexible patch structure, a standardized structure design and an independent electrode packaging design are provided, so that the problems that the connection between the electrode and a circuit is unstable and the activity of the electrode is reduced during long-term storage are solved.

The invention belongs to the technical field of tunnel natural electric field methods, and provides a tunnel natural electric field water detection system and method based on hole-tunnel multi-angle combined observation. The measuring electrode system comprises a two-dimensional array electrode arranged on a tunnel face, a one-dimensional longitudinal electrode system arranged in a drill hole of the tunnel face and a reference electrode arranged in a static area of the tunnel, the two-dimensional array electrode and the one-dimensional longitudinal electrode system are arranged in a spatial cross mode, and the reference electrode is connected to the two-dimensional array electrode and the one-dimensional longitudinal electrode system of the tunnel face. A plurality of paths of electrodes are formed; the detection control host is configured to issue an information acquisition instruction, set an independent differential acquisition channel for each path of electrode, acquire potential difference data between all the measuring electrodes and the reference electrode under a unified clock and synchronous control, interpret and image potential difference data signals between all the measuring electrodes and the reference electrode, and determine the potential difference data signals between all the measuring electrodes and the reference electrode. And determining the position of the abnormal body in front of the tunnel and the underground water migration trend.

The present application relates to the field of optoelectronic technology, and more particularly to a high-efficiency terahertz chip and a terahertz wave generator. The chip comprises a substrate, the substrate material is one of sapphire, aluminum nitride, silicon nitride or silicon carbide; a waveguide groove is formed on the substrate in a specific shape, and an inert metal layer is arranged on the inner surface of the waveguide groove. The chip can be controlled by an acousto-optic device and a mechanical piezoelectric device, further capable of changing the density of the crystal on the chip substrate, and at the same time, the metal layer in the waveguide groove can form a channel electrode to increase the terahertz formation, thereby forming a closed-loop terahertz emission and receiving chip, so that the chip can be miniaturized, and the density of the crystal can be changed by the acousto-optic and mechanical piezoelectric methods, thereby being capable of modulating the terahertz energy to a special wavelength for emission.

The application relates to the technical field of brain-computer interface, and discloses a signal acquisition method for brain-computer interface control of a lower-limb exoskeleton robot. The method collects original electroencephalogram signals through a multi-channel electrode array arranged on a motor cortex of a scalp, and synchronously collects motion data of a lower-limb inertial measurement unit. In the signal processing process, differential amplification is adopted to suppress common-mode interference, adaptive narrow-band filtering is adopted to dynamically track electroencephalogram rhythms, and a blind source separation algorithm based on independent component analysis is adopted to remove motion artifacts. Finally, the processed motion intention electroencephalogram signals are output, the precision and real-time performance of intention recognition are improved, and accurate and stable control signals are provided for the lower-limb exoskeleton robot.

The application provides a product real-time detection method for a photocatalytic water decomposition reaction based on a double-channel electrode, utilizes the prepared double-channel electrode, and can synchronously perform photocatalytic reaction and product detection during detection, can effectively transmit substances during the photocatalytic reaction and the product detection process, and guarantees the real-time and accuracy of detection. In addition, the double-channel electrode structure used in the application guarantees that the substance transmission mode on the surfaces of the two working electrodes is realized by spontaneous diffusion, avoids the generation of noise caused by external disturbance, and thus realizes the real-time monitoring target of the reaction product in the solution to be detected. The application can perform real-time detection on the generated product gas molecules in the initial stage of the photocatalytic reaction, greatly reduces the detection blind area. The real-time detection method of the application has a wide application range and can be used for the real-time detection of the products of photocatalytic reactions driven by various photocatalysts.

The invention provides a deep brain-electrophysiology sensing system based on an F-P optical fiber and a flexible electrode, the deep brain-electrophysiology sensing system comprises an F-P force sensitive optical fiber sensor and a flexible multi-channel electrode which are integrated together, an implantation structure of the flexible multi-channel electrode comprises a plurality of handle parts, the surface of each handle part is provided with a flexible electrode array comprising a plurality of electrode sites, and the flexible electrode sites are arranged on the flexible electrode array. Wherein the flexible electrode array of one handle part and the F-P force sensitive optical fiber sensor are fixed in parallel through a biocompatible adhesive. According to the invention, the F-P force sensitive optical fiber sensor is adopted to realize high-precision force sensing. The size of the F-P force sensitive optical fiber sensor is smaller than that of a traditional optical fiber sensor; the size of the implantation part of the flexible multi-channel electrode is far smaller than that of the F-P force sensitive cavity, and the minimum invasion diameter in the implantation process is determined by the maximum diameter of the F-P force sensitive cavity, so that the total volume of the sensing system is suitable for deep brain implantation, and tissue damage is reduced.

The application belongs to the technical field of photoelectric detection, and relates to a wide-spectrum micro-nano photoelectric sensor and a preparation method and application thereof. The wide-spectrum micro-nano photoelectric sensor adopts a multi-channel electrode arrangement structure, each sensing channel is composed of 2 metal wires and one metal oxide, and both ends of each sensing channel are respectively provided with conductive contacts to form a conductive loop; wherein different sensing channels respectively adopt metal oxides with different band gaps, and the metal wires and the metal oxides are respectively prepared by laser direct writing. The spectral response range of the wide-spectrum micro-nano photoelectric sensor includes ultraviolet light, visible light and infrared light. The micro-nano photoelectric sensor prepared by using metal oxides with different band gaps can break through the limitation that a single metal oxide can only sense a specific wave band due to a narrow band gap, wide-spectrum photoelectric sensing is realized, and the laser direct writing technology realizes efficient and low-cost manufacturing of the micro-nano photoelectric sensor.

The embodiment of the invention provides an atomizer and an atomizing device. An atomization support of the atomizer is arranged in the shell, a first liquid inlet channel and a second liquid inlet channel are defined by the atomization support, and the liquid inlet end of the first liquid inlet channel and the liquid inlet end of the second liquid inlet channel are communicated with the liquid storage cavity. The atomizing face of a first atomizing core and the atomizing face of a second atomizing core of the atomizing core assembly are oppositely arranged, and the liquid outlet end of a first liquid inlet channel and the liquid outlet end of a second liquid inlet channel are blocked by the first atomizing core and the second atomizing core respectively. The atomization support further comprises an air inlet channel and electrode connecting channels distributed on the two sides of the air inlet channel, and the electrode connecting channels are configured to be connected with the conductive electrodes in a positioning mode so as to limit the conductive electrodes to be electrically connected with the heating circuits of the first atomization core and the second atomization core respectively. Therefore, aerosol generated by atomization of the first atomization core and aerosol generated by atomization of the second atomization core can be collided together, the size of generated aerosol molecules is increased, and the wetting effect of the aerosol molecules generated by the atomizer is improved.

This invention relates to the field of medical device technology, specifically to a multi-parameter adjustable multi-channel electrical stimulation waveform generation device, comprising a main unit, a multi-channel electrode unit, a multi-channel connection component mounted on the portable main unit, and electrode components mounted on the multi-channel connection component. By adopting a multi-channel integrated structural design and a portable wearable layout, the device improves ease of use and applicability. The use of independent multi-channel output and unified timing synchronization control enhances treatment and training efficiency. Independent and continuous adjustable control of the three key parameters—stimulation frequency, pulse width, and amplitude—improves treatment adaptability and effectiveness. Closed-loop negative feedback constant current output control enhances safety and stimulation reliability. The magnetic quick-connect structure and multi-channel signal distribution method ensure pure and stable stimulation output, further improving device safety and treatment efficacy.

The utility model provides a liquid leakage detection circuit with an adjustable threshold value. The liquid leakage detection circuit comprises a sampling circuit of a multichannel electrode, a multipath check device circuit, a microcontroller circuit, a reference voltage circuit and a CAN communication transceiver circuit. The detection electrode is connected with the input end of the sampling circuit of the multi-channel electrode; the output end of the sampling circuit of the multi-channel electrode is connected with the input end of the multi-channel check device circuit; the output end of the multiplexer circuit is connected with the input end of the microcontroller circuit; the output end of the microcontroller circuit is connected with the input end of the CAN communication transceiver circuit through TXD; the output end of the CAN communication transceiver circuit is connected with the microcontroller circuit through an RXD. The output end of the reference voltage circuit is connected with the input end of the microcontroller circuit. Different resistance values of electrodes of the liquid leakage sensor are extracted, the resistance values are converted into electric signals through a circuit, AD conversion is carried out on the converted voltage values, analog signals are converted into readable data streams, and the data streams are stored in the microcontroller.

This utility model discloses a comparative testing device for electroplating additives, including a main storage tank, a test chamber, and a multi-channel electrode control system. A three-way pipe is provided between the main storage tank and the test chamber, and an electrolyte filtration structure is installed at the outlet end of the main storage tank. This utility model ensures consistent electrolyte composition by connecting the test tanks to the main storage tank via the three-way pipe. Multiple test tanks improve testing efficiency. A stirring shaft and a stirring paddle are installed in the test tanks to ensure uniform mixing of the additives and electrolyte. The electrolyte filtration structure installed at the outlet end of the main storage tank allows for pretreatment of the electrolyte before it enters the test tank, preventing contaminants from entering and improving the accuracy of test data. A filter screen is used to intercept large particulate impurities, and a filter cloth is used to filter fine suspended matter. The filter is connected to a slot via a plug for easy disassembly and cleaning.

The invention relates to the technical field of medical detection, and discloses an electroencephalogram signal-based neuropathic pain detection and analysis system, which comprises an electroencephalogram signal acquisition module, a signal preprocessing module, a feature extraction module, a pain detection and analysis module, a result output module and a system calibration module which are electrically connected in sequence to form a closed-loop detection and analysis system, objective detection of neuropathic pain is achieved, subjective description of a patient does not need to be depended on, misdiagnosis and missed diagnosis caused by subjective factors are effectively avoided through pure objective electroencephalogram signal analysis, and a reliable objective basis is provided for clinical diagnosis and treatment; the electroencephalogram signal acquisition precision is high, electroencephalogram signals of different scalp areas are comprehensively acquired through the 32-channel electrode array, various interference signals are effectively filtered out in combination with an improved self-adaptive filtering algorithm, the signal quality is ensured, and a reliable basis is provided for feature extraction and detection analysis.

Embodiments of the present disclosure relate to a pre-calendering system for reducing strain imbalance of multi-channel electrodes. In general, one or more aspects of the present disclosure relate to methods, systems, and apparatus for pre-straining a bare channel of a multi-channel electrode with a system for calendering a multi-channel electrode, where the system for calendering a multi-channel electrode includes: a pre-strained roller apparatus including a plurality of pre-strained rollers and a pressure roller, the plurality of pre-strain rollers and the pressure roller form a pre-strain pressure head; and a calender roll device including a pair of calender rolls forming a calender head positioned downstream of the pre-strain roll device.