82 results about "Potentiostat" patented technology

Provided is a potentiostat-based electrochemical sensor detection device. The device comprises: a digital-to-analog converter (DAC) configured to receive a digital signal from a waveform generator and digital logic and output an analog signal corresponding to a reference voltage; a control amplifier (CA) configured to receive the analog signal corresponding to the reference voltage and apply the reference voltage to a reference electrode (RE); a gain-boosting current mirror configured to copy a sensor current of an electrochemical sensor and output a copied sensor current; a transimpedance amplifier configured to convert the copied sensor current into a voltage signal; a low-pass filter configured to block a high-frequency band signal component of the voltage signal; and an analog-to-digital converter (ADC) configured to perform digital signal processing on a signal having passed through the low-pass filter, wherein at least one of the gain-boosting current mirror and the transimpedance amplifier employs a dynamic element matching (DEM) technique using a plurality of choppers and a plurality of DEM clock signals.

Techniques for determining microbiological corrosion include flowing a mixed-phase wellbore fluid from at least one tank into a volume of a reactor tank of a microbiological corrosion reactor; controlling a multi-channel potentiostat coupled to a three-electrode cell assembly positioned in the volume, the three-electrode cell assembly including a working electrode, a counter electrode, and a reference electrode, where each of the working electrode, the counter electrode, and the reference electrode is positioned in the volume to contact the mixed-phase wellbore fluid; based on controlling the multi-channel potentiostat, activating the working electrode in the mixed-phase wellbore fluid in the volume; and determining, based on activating the working electrode, a corrosion rate of at least one of the working electrode or a target coupon positioned within the mixed-phase wellbore fluid in the volume.

The invention discloses a sewage treatment equipment state supervision system, belongs to the technical field of sewage treatment, and solves the problems that the sewage contains reducing sulfides and competes with denitrifying bacteria for electron donors, so that the COD in an anoxic zone is sufficient, the nitrate reduction rate is low, a false carbon source sufficient trap with inhibited denitrification occurs, but the sulfide is easy to oxidize, and the potential safety hazard is caused. And a sampling detection result is distorted and is difficult to identify. According to the invention, sewage is measured in an anoxic zone through a probe interface module, under the scheduling of a time division control module, a constant potential rectifier module excites sulfide characteristic oxidation current in a DPV time period, a logarithmic current detection module captures a peak value and integrates a charge quantity, an impedance detection module measures phase offset in an EIS time period, a signal processing module fuses characteristic values, and a temperature compensation module eliminates errors. The reference electrode protection module ensures signal fidelity, outputs sulfide concentration and electron competition index, starts a dosing system when the concentration exceeds the limit, and prevents sampling oxidation distortion in the whole process.

The invention provides an electrochemical selective extraction process and device, and relates to the technical field of material extraction in the nuclear fuel circulation process, and the electrochemical selective extraction process comprises the following steps: respectively carrying out corrosion potential tests on an uncontaminated stainless steel sample and a stainless steel sample contaminated with nuclide; obtaining the corrosion potential a of the uncontaminated sample relative to the cathode and the corrosion potential b of the contaminated nuclide sample relative to the cathode; putting a to-be-treated metal workpiece of which the surface is adhered with a pollutant material into an anode basket of an electrochemical extraction device, and connecting the anode basket to an anode of a direct-current power supply or a potentiostat; mixing nitric acid, sodium nitrate, a corrosion inhibitor and a slow release agent to prepare an electrolyte; a cathode basket of the extraction device is connected with a negative electrode of a direct-current power supply or a potentiostat, an anode basket is nested in the cathode basket, and the anode basket and the cathode basket are jointly immersed in electrolyte for extraction. According to the method, pollutants adhering to the irregular metal surface are effectively removed and recycled, the extraction rate of contaminated metal nuclides reaches 99% or above, and the introduction amount of matrix elements is lower than 3500 ppm / g matrix.

The present disclosure presents glucose monitoring systems and methods. One such system comprises a glucose monitoring sensor having at least a counter electrode, a reference electrode, and a working electrode; and a silicon-carbide-silicon-carbide-nanoparticles-electrospun-nanofibrous-membrane contacting the working electrode. The system further includes a glucose oxidase enzyme solution contacting the silicon-carbide-silicon-carbide-nanoparticles-electrospun-nanofibrous-membrane, wherein a conductive polymer membrane assists in binding the glucose oxidase enzyme composition with the silicon-carbide-silicon-carbide-nanoparticles-electrospun-nanofibrous-membrane. Other systems and methods are also provided.

A clinical bedside system facilitates care for complex care patients. The system can include a medical device having a biosensor with an inert substrate and a working electrode, a counter electrode, and a reference electrode deposited thereon. The working electrode can have an antifouling membrane thereover to which a capture antibody is immobilized. The capture antibody can be configured to capture a biomarker between it and a detection antibody, thereby sandwiching the infection biomarker between the antibodies for a detectable redox reaction between an enzyme conjugated to the detection antibody and the working electrode. The counter electrode can complete completes an electrical circuit including the working electrode. The reference electrode can be operably connected to the electrical circuit. The reference electrode can be configured to provide a reference point against which changes in potential at the working electrode can be measured, for example, with a potentiostat.

The present disclosure presents glucose sensing methods and systems. One such system comprises an electrospun-nanofibrous-membrane (ENFM)-based amperometric glucose sensor integrated on a silicon chip, in which the glucose sensor has a working electrode, a reference electrode, and a counter electrode, wherein the working electrode comprises an ENFM-based sensing electrode. The system further comprises a potentiostat circuit integrated on the silicon chip such that the potentiostat circuit comprises a voltage control unit to control a voltage difference between the working electrode and the reference electrode and a transimpedance amplifier to measure a current flow between the working electrode and the counter electrode, in which a strength of the current flow corresponds to an amount of glucose present in a sample of blood on the glucose sensor.

An electrochemical method for detecting, identifying, and quantifying ions and nutrients dissolved in water through voltammetry, and equipment to carry out the method, including: a preparation / placement stage of a sensor, with a reference electrode, working electrode, and counter electrode, in a potentiostat; a stage for contacting a sample or analysis solution containing the analyte with the sensor; a stage for applying, controlled via software from a computer system, electrical stimulation to the sample through Cyclic Voltammetry, Normal Pulse Voltammetry, Differential Pulse Voltammetry, or Square Wave Voltammetry, with a step potential and pulse amplitude range between −3,000 mV and 3,000 mV; and a stage for characterizing one or more analytes based on at least one measurement of the signals resulting from the oxidation-reduction of the analyte(s).

The invention belongs to the technical field of water environment detection, and particularly relates to a portable detection device and method for the total discharge amount of water pollutants. The portable detection device at least comprises a three-electrode sensor module, a potentiostat module, an analog-to-digital conversion module, a microcontroller, a peripheral circuit of the microcontroller, a Bluetooth module and a power module, and the three-electrode sensor module comprises a working electrode coated with a tungsten oxide film, a reference electrode and a counter electrode; the constant potential rectifier comprises at least two electrode channels, is connected with the microcontroller and the analog-to-digital conversion module and is used for controlling voltage to detect hydrology and water quality parameters; and the Bluetooth module is used for being paired with intelligent equipment to transmit data. The portable water environment detection device and the hydrology and water quality synchronous detection method can be provided, the problem that scattered and small drain outlets cannot be detected is effectively solved, and the detection device is provided for real-time online evaluation of the total discharge amount of water pollutants.

This invention relates to a temperature-controlled stress electrochemical metal hydrogen permeation testing device and method. The testing device includes a hydrogen permeation electrolytic cell, a hydrogen efflux electrolytic cell, a first temperature control mechanism, a second temperature control mechanism, a tensile testing machine, a potentiostat, an auxiliary electrode, a reference electrode, and a working electrode. The hydrogen permeation electrolytic cell is equipped with a first temperature control mechanism for controlling the temperature of the hydrogen permeation electrolytic cell, and the hydrogen efflux electrolytic cell is equipped with a second temperature control mechanism for controlling the temperature of the hydrogen efflux electrolytic cell. The sidewalls of the hydrogen permeation electrolytic cell and the hydrogen efflux electrolytic cell are respectively provided with a first connecting pipe and a second connecting pipe. Both the hydrogen permeation electrolytic cell and the hydrogen efflux electrolytic cell are equipped with an auxiliary electrode and a reference electrode. The two ends of the working electrode are respectively connected to the tensile testing machine. The working electrode, the reference electrode, and the auxiliary electrode are respectively connected to the potentiostat. A sample is welded onto the working electrode. The hydrogen-filled surface and the hydrogen-effluxed surface of the sample are sealed to the first connecting pipe and the second connecting pipe through sealing gaskets.

The present invention discloses a buried pipeline stray current anode transient interference corrosion monitoring device and a testing method, relating to the technical field of stray current interference corrosion monitoring. The device comprises an experimental box, an experimental medium, a transient interference system and an interference testing system. The transient interference system comprises a constant potential instrument, a switching controller, a metal electrode bundle, an auxiliary electrode group and a reference electrode. The output value and output cycle of the constant potential instrument are adjusted to simulate the interference intensity and interference frequency of cathodic protection and stray current. The buried pipeline stray current anode transient interference corrosion monitoring device and the testing method of the present invention utilize a metal electrode bundle to realize the monitoring and evaluation function of the transient corrosion effect of the anode transient interference on the pipeline. The current distribution on the surface of each metal electrode is scanned by program control to characterize the local corrosion characteristics of the pipeline. The method is more comprehensive and systematic than traditional testing methods, and the data obtained is more valuable for reference.

The invention provides a detachable screw protection device for a screw hoist. The detachable screw protection device comprises a small potentiostat and a protection assembly, the protection assembly is arranged at the top of the screw hoist and comprises a protection cover, a fixed anode and a cathode electric brush, the fixed anode and the cathode electric brush are both arranged outside a screw and matched with each other to form cathode protection on the screw, the fixed anode is connected with an anode of the small potentiostat through a cable, and the cathode electric brush is connected with the cathode of the small potentiostat through a cable. And the cathode brush is connected with the cathode of the small-sized potentiostat. By arranging the insulating sleeve, the protective cover, the cathode electric brush, the fixed anode, the small-sized potentiostat and other components, the protective cover can simply protect the screw rod, and meanwhile, the cathode electric brush, the fixed anode and the small-sized potentiostat are matched with one another to form cathode protection current to protect the screw rod.

Provided are systems, cartridges, devices and methods for detecting a target analyte in a test sample. The system employs a multitude of magnetic sources for moving magnetic beads in a sequential movement through various portions of e.g. a cartridge or strip, such as from one or more hybridization portions, through one or more washing portions, and to a redox portion. The system employs an electrode set and a potentiostat for performing amperometry to obtain an electrochemical measurement based on conversion of a redox active molecule. Also provided are methods for detecting a target analyte using the systems, and cartridges and strips for use in the system or a device of the system.

The application discloses a digital constant potentiostat based on linearity calibration technology, comprising a quantizer, a control logic module, a current domain digital-to-analog converter, an oscillator and a frequency mixer, which constitutes a digital closed loop circuit with an electrochemical sensor, and realizes constant potential difference between a working electrode and a reference electrode of the electrochemical sensor and sensing current size detection between the working electrode and a counter electrode through negative feedback regulation of the digital closed loop circuit, so that a greater sensing current detection dynamic range is realized under extremely low power consumption, the differential current domain digital-to-analog converter is used to quantitatively transmit the linearity characteristics of the sensing current in the form of frequency while converting the sensing current into a digital code word, so as to realize linearity calibration of the mapping relationship between the detected sensing current size and the output digital control code word, thereby realizing high linearity sensing current detection under extremely low power consumption.

The utility model provides a marine potentiostat control cabinet, which comprises a cabinet body provided with an accommodating space; the cabinet door is rotatably connected with the cabinet body, and the cabinet door covers the accommodating space; the control unit layer is arranged in the accommodating space and comprises a first transformer, a driving piece and a main control piece; the element layer is in circuit connection with the control unit layer, the element layer is arranged on the side, away from the cabinet door, of the control unit layer, and the element layer comprises a rectification module and a high-frequency conversion module; the heat dissipation layer is connected with the element layer, and the heat dissipation layer is arranged on the side, away from the control unit layer, of the element layer; the access end is arranged in the accommodating space and is used for accessing marine alternating current; wherein the control unit layer is used for controlling elements in the element layer to work, the element layer is used for converting marine alternating current into low-voltage direct current, and the heat dissipation layer is used for heat dissipation of the element layer. According to the utility model, the problem that similar marine potentiostat control cabinets in the prior art cannot stably and efficiently complete electric energy conversion and realize accurate control of the potential of a ship body is solved.

A gathering pipeline internal corrosion control system and a control method. The gathering pipeline internal corrosion control system comprises: a pipeline network main body, including a gathering trunk line and a station internal collecting pipe with an anticorrosion insulation layer on the inner surface, the output end of the gathering trunk line is in electrical communication with the station internal collecting pipe, the station internal collecting pipe is provided with an electrical connection area, the pipeline network main body is electrically connected with the medium transported in the station internal collecting pipe through the electrical connection area; an auxiliary anode is arranged inside the gathering trunk line; a reference electrode is arranged inside the station internal collecting pipe; a connecting piece is arranged at the end of the pipeline network main body and is arranged to electrically isolate the pipeline network main body and the butt joint pipeline; and a constant potential instrument has an anode connection part, a cathode connection part, a zero connection part and a reference connection part, the anode connection part is electrically connected with the auxiliary anode, the cathode connection part and the zero connection part are both electrically connected with the pipeline network main body, and the reference connection part is electrically connected with the reference electrode. The gathering pipeline internal corrosion control system can solve the problem of accelerated corrosion perforation of the pipeline network main body caused by the failure of the internal coating / inner plating layer.

The application discloses an air bacterial electrostatic collection and real-time monitoring system and method integrated with a microfluidic portable sensor, and belongs to the technical field of environmental monitoring, and comprises an aerosol sampling module, a microfluidic processing module, an electrochemical sensing module and a portable constant potential instrument module. Bacteria aerosols in the ambient air are charged by corona discharge to realize efficient enrichment and collection; the enriched liquid sample is sent into the microfluidic processing module and flows through a sensing electrode modified with CuFeCoPBA@MoS2 nano composite material, polydopamine and concanavalin A. Target bacteria are combined with the concanavalin A on the surface of the electrode in a broad-spectrum specific manner, the interface electron transfer is hindered, the portable constant potential instrument collects the attenuation change of differential pulse voltammetry electrochemical signals, and rapid quantitative detection of the concentration of air bacteria is completed. The application integrates efficient air aerosol collection and portable biosensing, and can realize one-step on-site capture and detection of air pathogens.

The present application relates to monitoring and monitoring methods for chromium-free anodization sealing processes. A method for in-situ monitoring and optimization of a sealing process, the method comprising: sealing a surface of an anodized substrate, providing a test anodized substrate corresponding to the anodized substrate into the same sealing process as the anodized substrate, measuring an electrochemical surface potential of the test anodized substrate representative of a surface of the anodized component, collecting the electrochemical surface potential measurement data, analyzing the electrochemical surface potential measurement data, and identifying one or more performance indicators related to sealing quality and process parameters. The method can comprise: using information obtained from analyzing the electrochemical surface potential measurement data to optimize the sealing process, measuring the electrochemical surface potential using a potentiostat and a reference electrode, and measuring the electrochemical surface potential of the test anodized substrate representative of a surface of the anodized component.

The utility model relates to the technical field of anti-corrosion monitoring, in particular to wind turbine generator anti-corrosion monitoring equipment, which comprises a constant potential rectifier, the constant potential rectifier is mounted in a protection box, a moisture-proof plate is mounted on the rear side of the protection box, and a buffer frame is mounted at the lower end of the protection box; the auxiliary anode is fixedly mounted in the protective shell, and a reference electrode is arranged beside the auxiliary anode; the device has the beneficial effects that the auxiliary anode is mounted near the protected metal, and meanwhile, the reference electrode is mounted near the protected metal, so that the potential change of the protected metal is monitored and fed back in real time, the adjustment is carried out, and the constant potential rectifier is placed at a proper position through a special lifting appliance when equipment is mounted. And a buffer frame is installed at the lower end of the potentiostat and can buffer the acting force generated when the potentiostat is lowered, and a moisture-proof plate located behind the protection box can effectively isolate external moisture from entering, so that the problem that equipment parts are damaged due to the fact that equipment is located in a humid environment for a long time is solved.

The utility model discloses a kind of simulation reference device and intelligent constant potential instrument simulation test system, the simulation reference device includes adjustable potentiometer, anode binding post, cathode binding post and reference binding post set on pedestal, anode binding post is connected with the input end of adjustable potentiometer, cathode binding post is connected with the ground end of adjustable potentiometer, reference binding post is connected with the adjustable end of adjustable potentiometer.In the intelligent constant potential instrument simulation test system, load, ammeter and intelligent constant potential instrument are accessed by multiple wires, the simulation reference device uses Ohm's law voltage division principle voltage division simulation reference electrode, and based on the reverse correlation characteristics of adjustable potentiometer resistance value and output potential (the more negative corresponding current is greater for potential), realize the dynamic simulation test of current output adjustment caused by the electrochemical reaction process change of external reference in cathodic protection system of intelligent constant potential instrument, compare by with ammeter current value, determine whether the tested intelligent constant potential instrument is qualified.

The present application belongs to the field of corrosion experiment technology and measurement, and relates to an electrochemical experimental device and experimental method for studying the interference of high-voltage direct-current transmission line grounding electrode discharge on buried pipeline, which solves the problem that the prior art cannot obtain comprehensive and reliable interference data of high-voltage transmission line grounding electrode discharge on buried pipeline in the laboratory. The corrosion of the cathode area and the anode area caused by the discharge current of the grounding electrode flowing into and out of the pipeline under cathodic protection is simulated by the damage points of the anticorrosion layer in the cathode area electrolytic cell and the anode area electrolytic cell, respectively. The direct current interference system is controlled by a direct current constant current source, the cathode protection system in the cathode area is controlled by a constant potential instrument, the cathode protection system in the anode area is controlled by a constant potential instrument, and the test system in the anode area is controlled by an electrochemical workstation. The device and the experimental method can be used for the simulation research on the electric interference corrosion of the high-voltage direct-current transmission line grounding electrode discharge on the buried pipeline.

A chip includes a first substrate, a second substrate coupled with the first substrate, and a membrane disposed between the first substrate and the second substrate. The first substrate has a first channel, a first trench, a second trench, and a third trench, and the second substrate has a second channel corresponding to the first channel. The first trench, the second trench, and the third trench are extended from the first channel, and each of the trench forms an opening on the edge of the first substrate. A microfluidic cell culture device includes the chip, an incubator, and a potentiostat. A method for culturing a cell includes providing the microfluidic cell culture device; and introducing the cell to the membrane.

Aspects of the present disclosure provide techniques for measuring an ion concentration level of a user of a wearable device. An example method performed by the wearable device includes applying, using a potentiostat of the wearable device, a bias voltage to an ion selective electrode (ISE) of a transcutaneous ion sensor of the wearable device, measuring a current associated with the ISE of the transcutaneous ion sensor, adjusting the bias voltage based on the measured current associated with the ISE until the measured current is within a threshold range, determining, based at least in part on the measured current, the ion concentration level of the user, and transmitting an indication of the ion concentration level of the user to a display device for display to the user.

Microbial electrosynthesis (MES) may be used in converting carbon dioxide from a gas-oil separation plant (GOSP) to fixed carbon products. Example methods of MES may include: separating emitted carbon dioxide from an extracted gas-oil in a GOSP; dispersing the emitted carbon dioxide in a first portion of electrolyte solution in a cathode chamber of an electrolysis reactor; converting the emitted carbon dioxide to a fixed carbon product with a biocatalyst within the cathode chamber; and maintaining an electric potential between a cathode of the cathode chamber and an anode of an anode chamber with a potentiostat, wherein the cathode chamber and the anode chamber are separated by a semi-permeable membrane.

The application discloses a system for producing acid based on carbon dioxide electro-reduction by combining MXene material and bio-electrochemical enhancement, and has the characteristics that the system comprises an anode chamber, a cathode chamber, a proton exchange membrane and a constant potential instrument; the anode chamber and the cathode chamber are connected in isolation through the proton exchange membrane, and the constant potential instrument is connected with the lead wire penetrating through the anode lead wire port arranged on the anode chamber, the lead wire penetrating through the cathode lead wire port arranged on the cathode chamber and the reference electrode arranged in the cathode chamber; and the MXene material is added into the cathode chamber. The application also discloses a method for producing acid by microorganism carbon dioxide electro-reduction by using the system, and has wide application prospect.

The utility model relates to the technical field of wind power generation, in particular to a splash zone single pile anti-corrosion structure which comprises a single pile body, an anti-corrosion device is arranged on a splash zone of the single pile body, and the anti-corrosion device comprises an impressed current anti-corrosion device and a composite coating anti-corrosion device. The impressed current anti-corrosion device comprises a platform arranged on the upper portion of a single pile body, a constant potential rectifier placed on the platform, a current sensor and an auxiliary anode arranged on a splash zone, a reference electrode arranged at the bottom of the single pile body, and the constant potential rectifier, the current sensor and the auxiliary anode are connected in series through a cable. The composite coating anti-corrosion device comprises a composite anti-corrosion paste layer arranged outside the splash zone of the single pile body, an anti-corrosion buffer strip layer arranged outside the composite anti-corrosion paste layer, a waterproof ring layer arranged outside the anti-corrosion buffer strip layer, and a winding adhesive tape layer arranged outside the waterproof ring layer.

The invention relates to a stray current interference self-adaptive regulation and control method and system of a cathode protection system, and belongs to the technical field of electrochemical corrosion protection. The method comprises the following steps: monitoring stray current interference along a protected metal structure and calibrating monitoring points in a range; identifying the interference type as steady-state direct-current, dynamic direct-current or alternating-current interference; and respectively executing matched adjustment strategies for different interference types, and dynamically adjusting the preset potential of the drainage potentiostat on the basis of potential deviation, corrosion risk level or alternating current density and the like. According to the method, intelligent recognition, classified response and accurate regulation and control of complex stray current interference are achieved, under-protection or over-protection is effectively avoided, and the safety, adaptability and coordination of a cathode protection system are improved.

The invention discloses an auxiliary anode state monitoring device based on carrier communication, relates to the field of impressed current cathodic protection, is applied to auxiliary anode state monitoring of an impressed current cathodic protection system, and solves the problem of remote monitoring of the auxiliary anode state of the impressed current cathodic protection system. Comprising a central control module and a terminal monitor, the installation position of the terminal monitor is close to an auxiliary anode, the central control module is installed in a potentiostat, and the terminal monitor and the central control module are both provided with carrier communication modules. Communication between the terminal monitor and the central control module is achieved in a carrier wave mode through a cathode line and an anode line of the impressed current cathode protection system. According to the implementation of the method, an operator can know the real-time state of the remote auxiliary anode through the constant potential rectifier, and misjudgment, caused by data distortion, of the operation state of the external current cathodic protection system is avoided.

The technology is based on a conducting, ferromagnetic ink made from, in an aqueous suspension: conducting nanopolymers, ferromagnetic nanoparticles, an adhesion promoter and optionally, a surfactant and / or stabilizer. The ink is used to form reversible physical and electrical connections between e.g., rigid and flexible devices. In some aspects, the conducting nanopolymers are PEDOT:PSS (poly(3,4-ethylenedioxythiophene) polystyrene sulfonate) nanopolymers and the magnetic nanoparticles are iron oxide nanoparticles. The ink, which may be magnetic, is used to form solid, flexible, ferromagnetic conducting designs or nodes which may also be magnetic. The flexible, ferromagnetic conducting designs or nodes are used to form reversible magnetic electrical connections with devices such as potentiostats and data telemetry devices.

The invention provides a two-channel electrochemical detection pen and application thereof in synchronous detection of traditional Chinese medicine active ingredients and biomarkers, and belongs to the technical field of biological detection. By means of the innovative modular pen-shaped design, the double working electrodes, the miniature potentiostat and the display unit are highly integrated successfully, synchronous or rapid switching detection of active ingredients of Chinese herbal medicine and human body biomarkers is achieved, and the efficiency of on-site rapid analysis is greatly improved. The device is simple, convenient and intuitive to operate, quick in detection process and intuitive in result display, the technical requirements and environmental dependence on operators are remarkably reduced, and the space-time limitation of traditional laboratory detection is broken through. Due to the excellent performance and portability, the detection pen can be widely applied to multiple scenes from traditional Chinese medicine planting, medicine production quality control to family health monitoring and the like, an effective technical tool is provided for constructing a distributed and instant quality and health monitoring system, and the detection pen has important practical value and wide market prospects.