49 results about "Electrochemical gas sensor" patented technology

The embodiment of the invention belongs to the technical field of electrochemical gas sensors, and relates to a preparation method of a counter electrode of an NO sensor, which comprises the following steps: adding a polymer adhesive into an organic solvent to prepare a polymer adhesive mother solution; mixing manganese dioxide powder with the polymer adhesive mother liquor, and stirring to form uniform slurry; coating a substrate with the slurry, and performing drying treatment to form a counter electrode plate; and putting the counter electrode plate into an environment with reducing gas or inert gas to carry out high-temperature reduction treatment so as to improve the oxygen vacancy concentration, thereby obtaining the counter electrode of the NO sensor. The invention further provides an NO sensor and an NO detection method. The counter electrode of the NO sensor and the NO sensor prepared by the embodiment of the invention have the advantages of low cost and high anti-interference capability while keeping high oxygen reduction catalytic activity, and are particularly suitable for high-selectivity and high-sensitivity detection of NO gas in the fields of environmental monitoring, medical diagnosis and the like.

The sensor device can include an electrochemical (EC) gas sensor, a metal oxide semiconductor (MOS) gas sensor, and control circuitry. The control circuitry can provide an EC excitation signal to the EC gas sensor and at least two MOS excitation signals to the MOS gas sensor to detect at least two gases. The control circuitry can detect the gases based on providing the EC excitation signal, receiving an EC response signal from the at least one EC gas sensor, providing the MOS excitation signal, receiving a MOS response signal from the MOS gas sensor, determining a multivariate response pattern based on the EC response signal and the MOS response signal, and distinguishing between the at least two gases in contact with the sensor device based on the multivariate response pattern.

The application provides a kind of deodorization equipment, including support frame and control module, the support frame is connected with support frame on buffer damping member, the right end of the support frame is provided with first purification part, the left end of the support frame is provided with second purification part, the air inlet of the first purification part is connected with air inlet pipe, the outer side of the air inlet pipe is provided with multi-modal perception module and environmental parameter acquisition module, the multi-modal perception module includes electrochemical gas sensor array for detecting the concentration of multiple specific gases, and metal oxide semiconductor sensor for detecting the intensity of environmental comprehensive odor;The environmental parameter acquisition module is used to collect environmental temperature and humidity data;The left of the support frame is provided with a controller, and the controller is provided with the control module;The application can realize real-time monitoring of environmental odor changes, adaptive adjustment of purification intensity, effective reduction of energy waste, improvement of deodorization efficiency and adaptation to various odor types.

An electrochemical gas sensor (1) having a stacked assembly of at least one first electrode (3) and a second electrode (6), which are respectively arranged on a carrier membrane (2, 5), and a separator (4) arranged between the electrodes (3, 6), including a gas conduction path (14) between the first electrode (3) and the second electrode (6). The gas conduction path (14) is constituted within the structural space defined by the electrodes (3, 6).

An electrochemical gas sensor comprising a housing containing a plurality of electrodes and a liquid electrolyte, the housing having a gas inlet, the sensor defining at least one port through the housing having a metal interface pin therein, the interface pin extending through the port from the exterior of the housing, being electrically connected to at least one of the plurality of electrodes in the interior of the housing, the sensor additionally comprising a seal located around the metal interface pin within the port, and compressed between a wall of the port and the metal interface pin thereby restricting egress of liquid electrolyte from the housing, wherein the seal comprises an annular seal which in its uncompressed form either presents a cross-section which is concave in a radially extending direction of the seal, or whose width is constant over an extended axial direction of the seal.

The invention relates to a collaborative calibration method of an electrochemical gas sensor, which comprises the following steps: under a preset environmental condition, electrochemical response signals and environmental parameters of a target sensor are synchronously acquired to construct a plurality of feature combinations, and the response signals are obtained under at least two hardware acquisition configurations; aiming at each feature combination, training a correction model of a plurality of architectures, and quantifying the computing resource cost of single prediction; after the calibration precision of each model is evaluated, in combination with corresponding hardware configuration information, constructing a multi-dimensional decision space representing a mapping relationship among model types, feature combinations, hardware configuration, precision and calculation cost; and according to the requirements of a specific application scene on calculation cost and precision, the optimal correction model, feature combination and hardware configuration are matched in the space, and accurate and efficient calibration of the gas concentration is realized. By means of the design, systematic balance between calibration precision and computing resource consumption is achieved.

The invention relates to the technical field of analysis and detection, in particular to an electrochemical gas sensor for detecting ocimene and a preparation method of the electrochemical gas sensor. The preparation method comprises the following steps: dispersing multi-walled carbon nanotubes in a ZnO nanoparticle solution, and then coating the surface of an electrode with the ZnO nanoparticle solution to prepare a composite material modified electrode; then ocimene template molecules and acrylamide functional monomers are dispersed in an alcohol solvent, polymerization reaction is performed under the action of a cross-linking agent and an initiator, and a molecularly imprinted polymer solution is prepared; and finally, coating the surface of the electrode modified by the composite material with a molecularly imprinted polymer solution, and eluting template molecules to obtain the electrochemical gas sensor. The sensor can sensitively and accurately detect the content of ocimene gas released in plants, and realizes high-specificity and high-sensitivity stable and accurate detection of ocimene in a complex environment. The invention provides important theoretical basis and technical support for cultivating high-quality crops, and assists the innovative development of the field of crop breeding.

The invention provides a grading lightweight correction method for cross sensitivity of an electrochemical gas sensor, which comprises primary correction, secondary correction and tertiary correction of the cross sensitivity, is a layer-by-layer progressive and mutually complementary correction system, and can reliably identify and process the cross sensitivity influence in the complete life cycle of the sensor. According to the invention, a model lightweight design thought is adopted, based on a response mechanism of an electrochemical sensor, that is, sensor response and gas concentration in a certain range are in an approximately linear relationship, and an adopted polynomial is not higher than a second order, so that a slight nonlinear demand of capture response is met, and an overfitting risk is prevented from being introduced; the model generalization ability can be improved, and the method is very suitable for being implemented on edge equipment with limited resources. According to the method, the model forms of all levels can be quickly determined according to industry requirements, and high-precision, low-delay and low-power-consumption cross-sensitive real-time correction can be realized on resource-limited edge equipment.

The utility model provides an electrochemical gas sensor. The electrochemical gas sensor comprises a first shell, a first working electrode, a second working electrode, a first counter electrode, a first reference electrode, a first electrolyte and a first gas mass transfer assembly, the first electrolyte is located in the first shell, and the first counter electrode, the first reference electrode, the first working electrode and the second working electrode are separately arranged through the first electrolyte; the first gas mass transfer assembly is located in the first shell and comprises a first buffer chamber and a first gas channel, and the first buffer chamber covers the first working electrode and the second working electrode; one end of the first gas channel is connected with the first buffer chamber, and the other end penetrates through the first shell, so that gas enters the first shell. According to the electrochemical gas sensor, the first working electrode and the second working electrode work cooperatively and share the same first buffer chamber and the first gas channel, so that the influence of electrode activity change on a measurement result is eliminated through twice measurement, and the measurement stability and reliability of the electrochemical gas sensor are greatly improved.

An electrochemical gas sensor for multi-gas analysis of a fluid sample includes an electrochemical gas sensing element and a data collection component. The data collection component is configured to cycle the electrochemical gas sensing element between first excitation and signal detection values and second excitation and signal detection values at a predetermined time constant, and to measure responses of the electrochemical gas sensor to the fluid sample at the first excitation and signal detection values and the second excitation and signal detection values wherein the responses of the electrochemical gas sensor to the fluid sample at the first excitation and signal detection values and the second excitation and signal detection values are indicative of identities, respective concentrations, or a combination thereof, of at least two analyte gases of the fluid sample.

The application relates to the technical field of analytical detection, in particular to an electrochemical gas sensor for detecting linalool and a preparation method thereof. The preparation method is to prepare the electrochemical gas sensor after modifying a molecular imprinting film-zeolite imidazolate framework-8-multi-walled carbon nanotube-zinc oxide (MIP-ZIF-8-MWCNT-ZnO) composite material on the surface of an electrode. The electrochemical gas sensor can sensitively and accurately detect the content of linalool gas released by plants, realizes stable and accurate detection of linalool with high specificity and high sensitivity in a complex environment, and has a wide application prospect.

The invention provides a gas sensing device and an environment monitoring system, and belongs to the technical field of gas detection. The gas sensing device comprises a plurality of micro-nano gas sensing units, a measuring unit and a microprocessor, wherein the plurality of micro-nano gas sensing units, the measuring unit and the microprocessor are integrated in the same module; the module comprises a detection layer circuit board, a control layer circuit board and an interface layer circuit board which are sequentially connected from top to bottom, a plurality of micro-nano gas sensing units are integrated on the detection layer circuit board, a measuring unit and a microprocessor are integrated on the control layer circuit board, and the interface layer circuit board is provided with an output interface; a shell is packaged on the module, a breathable film is arranged on the top surface of the shell, and the breathable film is positioned above the detection layer circuit board, so that the various micro-nano gas sensing units on the detection layer circuit board are in contact with gas to be detected. The gas sensing device disclosed by the invention is integrally packaged in a module, and can be directly mounted on reserved physical and electrical positions of the electrochemical gas sensor.

The present invention pertains to an electrochemical gas sensor for gaseous hydrides, wherein the gas sensor includes at least one housing with a first working electrode and with a second working electrode arranged therein, with a counterelectrode and with a reference electrode. The first working electrode, the second working electrode, the counterelectrode and the reference electrode are in an ionically conductive contact with an electrolyte. The reference electrode is arranged between the first working electrode and the second working electrode. The present invention further comprises a measuring device for the quantitative or qualitative determination of an analyte gas and a process for the quantitative or qualitative determination of an analyte gas and a process for determining the concentration of an analyte gas, as well as the use of an electrochemical gas sensor or measuring device for determining the concentration of an analyte gas.

A sensor device may include an electrochemical (EC) gas sensor, a metal-oxide semiconductor (MOS) gas sensor, and control circuitry. The control circuitry may provide EC excitation signals to the EC gas sensor, provide at least two MOS excitation signals to the MOS gas sensor, and detect at least two gases. The control circuitry may detect the gases based on receiving EC response signals from the at least one EC gas sensor based on providing the EC excitation signals, receiving MOS response signals from the MOS gas sensor based on providing the MOS excitation signals, determining a multivariate response pattern based on the EC response signals and the MOS response signals, and differentiating between the at least two gases in contact with the sensor device based on the multivariate response pattern.

This invention relates to the field of energy storage cabinet technology and discloses an energy storage cabinet with fire extinguishing function, including a cabinet unit with multiple independent explosion-proof compartments separated by fireproof partitions; an energy storage battery pack unit including battery modules respectively disposed in each of the independent explosion-proof compartments; and a multi-dimensional monitoring and early warning unit including temperature sensors, electrochemical gas sensors, smoke concentration sensors disposed in each of the independent explosion-proof compartments, and an AI early warning server connected to the signals of each sensor. This invention, through the synergistic effect of the multi-dimensional monitoring and early warning unit and the AI ​​early warning server, integrates multi-source data such as temperature, electrochemical gas, smoke concentration, and battery electrical parameters, enabling early identification of early characteristics of lithium battery thermal runaway. It accurately outputs graded early warning signals 15 to 30 minutes before open flames occur, achieving a fundamental shift from "passive response" to "active early warning."

A method of operating a capillary-limited electrochemical gas detection device includes applying an electrical signal to the electrochemical sensor of the gas detection device to generate a current flow between a working electrode and a counter electrode of the electrochemical gas sensor via an electrolyte of the electrochemical gas sensor, measuring a parameter of a response of the electrochemical sensor to the electric signal, comparing the measured parameter to a predetermined characterization of the parameter, wherein the predetermined characterization of the parameter provides a relationship between the parameter and a response of the electrochemical sensor over varying state of the electrochemical sensor, and determining an output value of the gas detection device from an output signal electrochemical sensor in sensing oxygen in the ambient environment and the comparison of the measured parameter to the predetermined characterization.

The invention belongs to the field of electrochemical sensors and relates to an NO electrochemical gas sensor which comprises a shell, a working electrode, a counter electrode, a reference electrode, an electrolyte and an adsorption filtering membrane, the shell has an air inlet; the gas inlet is covered with an adsorption filter membrane, and gas to be detected passes through the adsorption filter membrane and then is subjected to electrochemical reaction on the surface of the working electrode; wherein in the direction from the working electrode to the air inlet, the adsorption filtering membrane sequentially comprises a filtering layer, an adsorption layer and a waterproof breathable layer, the filtering layer is used for preventing interference gas from entering the shell, the adsorption layer is used for adsorbing the interference gas, and the air permeability of the waterproof breathable layer is higher than that of the filtering layer, so that after the adsorption layer adsorbs the interference gas to be saturated, the adsorption layer adsorbs the interference gas. The interference gas can be quickly desorbed to the outside. According to the NO gas sensor, the adsorption filtering membrane is arranged at the gas inlet of the sensor, so that various volatile gases can be adsorbed and filtered, cross interference caused by the various volatile gases is avoided, and the NO gas detection precision can be improved.

The invention relates to an electrochemical gas sensor, and belongs to the technical field of electrochemical gas sensors. The electrochemical gas sensor comprises a shell, a working electrode is arranged in the shell, a conductive metal wire is arranged on the lower surface of the working electrode, and a pretreated titanium sheet is arranged below the conductive metal wire to prevent active components on the working electrode from being dispersed into electrolyte; the preparation method of the pretreated titanium sheet comprises the following steps: carrying out alkali washing and chemical polishing on the titanium sheet to obtain the pretreated titanium sheet. The electrochemical gas sensor can accurately and rapidly measure the concentration of target gas, and is high in sensitivity, short in response time and recovery time, good in extreme environment stability and stable in long-term performance.

The invention provides a self-diagnosis method and a gas sensor module, and the method comprises the steps: periodically applying an excitation signal with a specific frequency to an auxiliary electrode of an electrochemical gas sensor, or applying an excitation signal for scanning in a preset frequency range, and collecting dynamic impedance spectrums of the electrochemical gas sensor in different periods; analyzing the characteristic change of the dynamic impedance spectrum, extracting preset key parameter evolution data, comparing the key parameter evolution data with a preset health reference value, and diagnosing whether the electrochemical gas sensor is in a performance degradation fault state or not. According to the method, internal degradation caused by sensitivity reduction such as catalyst poisoning and electrolyte drying can be accurately captured, the gas concentration value is dynamically corrected in real time, measurement deviation caused by sensitivity reduction is effectively counteracted, and it is ensured that the sensor can output high-precision data from the initial state to the later attenuation period.

The application discloses a kind of insulating material decomposition gas detection method and device in power distribution station room.Therein, the method comprises: collecting the initial gas generated by the insulating material decomposition in the target power distribution station room in multiple positions respectively corresponding;Filtering initial gas, to obtain filtered gas;Based on electrochemical gas sensor, the concentration corresponding to the first gas in filtered gas is detected, to obtain multiple positions respectively corresponding first detection result;Based on ultraviolet light sensor, the concentration corresponding to the second gas in filtered gas is detected, to obtain multiple positions respectively corresponding second detection result;Multiple positions respectively corresponding first detection result and second detection result are stored to the preset database and displayed to the preset display screen.The application solves the technical problem that the accuracy of subsequent defect detection is relatively low due to the difficulty of single sensor in simultaneously and accurately detecting multiple characteristic gases caused by the decomposition of insulating materials in power distribution station room.

The invention provides an electrochemical gas sensor and a preparation method thereof, and the electrochemical gas sensor comprises a housing which is provided with a mounting groove, and the groove opening of the mounting groove is located at the top of the housing; the isolating membrane covers the notch, and chemical gas can enter the mounting groove through the isolating membrane; the composite electrode layer is arranged in the mounting groove and divides the mounting groove into a liquid storage cavity and a containing cavity, the containing cavity is used for containing the composite electrode layer, the liquid storage cavity is used for storing alkaline electrolyte, and the electrolyte is in contact with the bottom of the composite electrode layer; and the electrode connecting piece is arranged on the shell and is used for electrically connecting the composite electrode layer with an external circuit board. According to the electrochemical gas sensor provided by the invention, the sulfuryl fluoride detection sensitivity is improved, so that the sulfuryl fluoride use safety is improved.

The application provides a liquid electrolyte-based MEMS electrochemical gas sensor and a preparation method thereof, and belongs to the technical field of gas sensors, and aims to solve the technical problem of poor sealing of the MEMS electrochemical gas sensor.The sensor comprises an upper chip and a lower chip, the upper chip is bonded above the lower chip, a microcavity, an air inlet hole and a working electrode, the working electrode has a part of regions in contact with electrolyte in the microcavity and another part of regions in contact with air through the air inlet hole, and a counter electrode, the counter electrode is located on the inner wall of the microcavity, the inner wall where the counter electrode is arranged is provided with a through hole, the counter electrode is arranged on the through hole, the through hole penetrates the upper chip or the lower chip and is in communication with the outside, and the through hole is filled with a metal conductor and is connected with the counter electrode.The MEMS electrochemical gas sensor arranges the lead wire and the pad on the non-bonding surface of the sensor by using the glass through hole or the silicon through hole technology, so that the silicon-glass bonding surface is free of other substances, the bonding is compact, and the sealing performance of the sensor is improved.

The present invention describes systems and methods for compensating for long-term drift sensitivity in catalytic-type electrochemical gas sensors used in systems for delivering therapeutic nitric oxide (NO) gas to a patient. This is achieved by compensating for drift that may be specific to sensors used atypically in these systems. In at least some cases, the long-term drift sensitivity of catalytic-type electrochemical sensors can be addressed by calibration programs. These programs can account for absolute changes in the set dose of NO delivered to the patient, which may lead to one or more baseline calibrations. The calibration programs used can reduce the number of times the sensor shuts down.The systems and methods described may take into account actions occurring in the supply system and / or aspects of the surrounding environment before performing a baseline calibration, and may postpone calibration and / or reject the use of the sensor output for calibration.

The invention relates to the technical field of analysis and detection, in particular to an electrochemical gas sensor for detecting linalool and a preparation method of the electrochemical gas sensor. According to the preparation method, the surface of the electrode is modified with a molecularly imprinted membrane-zeolite imidazate framework material-8-multi-walled carbon nanotube-zinc oxide (MIP-ZIF-8-MWCNT-ZnO) composite material, and then the electrode is prepared. The electrochemical gas sensor can sensitively and accurately detect the content of linalool gas released in plants, and high-specificity and high-sensitivity stable and accurate detection of linalool in a complex environment is realized. Through the technology, plant diseases can be found in an early stage, infection propagation of the diseases can be prevented, crop loss can be resisted, and the method has a wide application prospect.

The invention discloses a high-precision quick-response double-gas detection electrochemical sensor and a detection method thereof, and relates to the technical field of electrochemical gas sensors. Comprising a sensing electrode (1), a reference electrode (2), an auxiliary electrode (3), a liquid absorption membrane (4), an electrolyte (5), a shell (6), a diffusion hole membrane (7), a gas diffusion hole (8), a gas chamber (9) and a shunting device (10), the diffusion hole film (7) is arranged on the outer side of the shell (6) of the sensor; the gas diffusion hole (8) is formed in the middle of the diffusion hole film (7); the air chamber (9) is arranged between the diffusion hole membrane (7) and the sensing electrode (1); and the shunting device (10) is arranged in the air chamber (9). According to the invention, on the basis of the difference of gas response time, the synchronous detection of CO and H2 can be realized by virtue of the mutual matching of the gas diffusion hole (8) with a proper size and the gas chamber (9).

The utility model relates to the technical field of energy storage system monitoring, and discloses a multi-parameter monitoring device of an energy storage system, which comprises a monitoring box and a support, the support is mounted on the peripheral side of the bottom of the monitoring box, the monitoring box comprises a top plate, a side plate and a bottom plate, a partition plate is mounted on the bottom side of the top plate, an energy storage device is arranged in the monitoring box, and the side plate is mounted on the side plate. An electrochemical gas sensor is installed on the top of the energy storage device, a sensor is installed on the support, and the sensor comprises an acoustic emission sensor and a temperature sensor. A sensor and an electrochemical gas sensor form a multi-mode sensor fusion model, an acoustic emission sensor and a temperature sensor which are arranged on the sensor are used for monitoring high-frequency signals generated by microcrack propagation generated by an energy storage device and temperature change, and a multi-mode sensor fusion model is used for detecting the temperature change of the microcrack generated by the energy storage device. And the sensitivity and the reliability of leakage detection are remarkably improved.

The application relates to the technical field of analytical detection, in particular to an electrochemical gas sensor for detecting limonene and a preparation method thereof. The preparation method is as follows: multi-walled carbon nanotubes are dispersed in a ZnO nanoparticle solution, and then a composite material modified electrode is prepared by coating the multi-walled carbon nanotubes on the surface of the electrode; then, limonene template molecules and acrylamide functional monomers are dispersed in an alcohol solvent, and a polymer solution is prepared by polymerization under the action of a crosslinking agent and an initiator; finally, the polymer solution is coated on the surface of the composite material modified electrode, and the electrochemical gas sensor is prepared after eluting the template molecules. The sensor can sensitively and accurately detect the content of limonene gas released by plants, realizes stable and accurate detection of limonene in a complex environment with high specificity and high sensitivity, and provides important theoretical basis and technical support for cultivating high-quality crops and helps the innovative development of the field of crop breeding.

The application discloses a preparation method and application of a porous ceramic substrate electrochemical gas sensor, and the method comprises the following steps: pressing Fe, Mn and Al2O3 composite ceramic powder into a porous ceramic blank, and firing to obtain a porous FeMn@Al2O3 ceramic substrate; printing platinum paste on the FeMn@Al2O3 ceramic substrate, and sintering to obtain a porous electrochemical gas sensor substrate; dotting catalyst slurry on working electrodes and counter electrodes on the modified porous electrochemical gas sensor substrate, uniformly coating pretreated nafion solution on surfaces of the working electrodes and the counter electrodes after drying, and drying and solidifying to form a proton exchange membrane; dotting dilute sulfuric acid solution on the proton exchange membrane, and sealing one side of the whole electrode by using silica sol, so that the porous ceramic substrate electrochemical gas sensor is obtained. The electrochemical gas sensor has the advantages of good selectivity, high stability, simple preparation, low cost, strong adaptability, environmental friendliness and the like.

The invention discloses a test method for evaluating the performance of a key material of an electrochemical gas sensor, which comprises the following steps: printing a sensing key material to be tested on two sides of a solid electrolyte to form a four-electrode system sensing sample with a working electrode, a counter electrode, an upper sensing electrode, a lower sensing electrode and a lead electrode, and heating the sensing sample. The sensing sample is placed in air, a current density-potential test is carried out, the influence of the current density on the potential of the working electrode is determined, and then the working current density J0 during stable working is determined. Working current density J0 is applied to a sensing sample, air and detection gas are alternately introduced, working potential V0 and induced potential V1 and V2 are recorded, working electrode longitudinal resistance R1 = (V1-V2) / J0 and transverse resistance R2 = (V0-V1) / J0 are calculated, and when the longitudinal and transverse resistance ratio R1 / R2 is 1.1-10, it is judged that the sensing key material is qualified. According to the method, the internal longitudinal transmission efficiency and the transverse loss of the sensing key material during working can be distinguished and judged, and reference is provided for sensor design.

Various aspects of the present disclosure generally relate to gas detection. In some aspects, a gas detection system may receive, via one or more gas apertures in an electrochemical device, a composition of one or more gases. The gas detection system may apply a set of bias voltage sub-cycles, wherein, for each bias voltage sub-cycle, an applied voltage alternates between a corresponding steady voltage and a plurality of time-varying voltages centered about the corresponding steady voltage. The gas detection system may detect at least one of a current or a voltage while applying the set of bias voltage sub-cycles. The gas detection system may identify at least one of a presence of each gas or a concentration of each gas based at least in part on the at least one of the detected current or the detected voltage. Numerous other aspects are described.