78 results about "Electrochemical gas sensor" patented technology

A gas measuring device (100) for analyzing a gas mixture (310) and monitoring an environment (300) has a housing (110) for delimiting a measurement interior volume (120) and / or for separating the measurement interior volume (120) from the environment (300) containing the gas mixture (310). The housing has a gas inlet (111) and a gas outlet (112) for respective fluid-conducting connection between the measurement interior volume (120) and the environment (300), and an electrochemical gas sensor unit, which is arranged within the measurement interior volume (120), and which serves for determining a concentration of a gas fraction, in particular an oxygen fraction, contained in the gas mixture (310).The gas measuring device (100) has a heating element (220) and with an open-loop and / or closed-loop control system (230) to increase or maintain an interior temperature (TI) of the measurement interior volume (120) and settable by means of the control system (230).

The present invention provides a Pt / CMK-3 nanocomposite for a CO detection sensor, with metallic Pt as the carrier and CMK-3 as the additive loaded on the carrier. Among them, the mass ratio of the CMK-3 additive to the carrier Pt is 1-12:100. The preparation method is to first perform acidification pretreatment on CMK-3 to obtain the pretreated precursor CMK-3, and then load the precursor CMK-3 onto the noble metal Pt by a one-step hydrothermal method to obtain the Pt / CMK-3 nanocomposite. The Pt / CMK-3 nanocomposite of the present invention, as an electrode material for an electrochemical gas sensor, can improve the sensitivity to the target gas CO, shorten the response / recovery time, and can reduce the usage amount of platinum metal and lower the cost.

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 utility model discloses an electrochemical gas sensor connecting structure which comprises a connecting seat, a connecting opening is formed in the connecting seat, an elastic ring is arranged in the connecting opening, the middle of the elastic ring is used for being connected with an electrochemical gas sensor, and the elastic ring deforms when the electrochemical gas sensor is inserted so as to limit the electrochemical gas sensor. The connecting port with the elastic ring is adopted, and after the electrochemical gas sensor is inserted into the elastic ring, the elastic ring is extruded by the electrochemical gas sensor to deform so as to generate clamping force, so that clamping and limiting of the electrochemical gas sensor are realized, and then connection of the electrochemical gas sensor is realized; the mounting and dismounting process of the electrochemical gas sensor is simplified, and the working efficiency is improved.

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.

An electrochemical gas sensor 1 includes: a substrate 10; a gas detection part 2 that is disposed on a first surface 10a of the substrate 10; a cover 40 that covers the gas detection part 2; and a wiring 11 that is connected to the gas detection part 2 and is partially exposed from the cover 40. A connection part 15 that is to be connected to an external wiring or an external terminal is formed at a portion of the wiring 11 exposed from the cover 40.

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 invention relates to a sensitive material based on a nano-foam structure and an electrochemical hydrogen sulfide gas sensor, and a preparation method of the sensitive material based on the nano-foam structure comprises the following steps: S1, weighing Co salt and Fe salt, and dissolving the Co salt and the Fe salt in water to form a mixed solution; s2, adding glucose and urea into the mixed solution, and stirring until the glucose and the urea are dissolved to obtain a clear solution; s3, baking the clarified solution, so that the glucose and the urea are subjected to a Maillard reaction, and gas is released to form a porous nano-foam structure; s4, the porous foam is annealed so that the Co salt and the Fe salt can react, then the porous foam is naturally cooled to the room temperature after annealing, the cobalt ferrite nano-foam sensitive material is obtained, the chemical formula of the cobalt ferrite nano-foam sensitive material is Co2FeO4, and the cobalt ferrite nano-foam sensitive material is used as a sensitive material of an electrochemical H2S gas sensor. According to the embodiment of the invention, high-sensitivity, low-detection-limit, high-selectivity and high-stability detection of H2S can be realized.

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.

To provide an electrochemical gas sensor including a simple signal extraction structure.SOLUTION: An electrochemical gas sensor 1 includes: a base plate 10; a gas detection unit 2 that is placed on a first face 10a of the base plate 10; a cover 40 that covers the gas detection unit 2; a wiring 11 that is connected to the gas detection unit 2, and part of which is exposed from the cover 40. The portion of the wiring 11 exposed from the cover 40 is formed with a connection portion 15 to be connected to external wiring or an external terminal.SELECTED DRAWING: Figure 2

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."

An electrolyte for an electrochemical gas sensor, the electrolyte including a protonic ionic liquid, wherein the protonic ionic liquid has an octanol-water partition coefficient LogP of about −3.5 or less, and wherein water is used as a reactant of an electrochemical reaction for gas sensing, the water is generated as a product of the electrochemical reaction for gas sensing, or a combination thereof.

The utility model relates to a CO electrochemical gas sensor upper cover capable of reducing NO cross response. The upper cover comprises a cover body, a first groove is formed in the bottom face of the cover body, an air inlet communicated with the first groove is formed in the cover body, and the depth of the first groove is 0.5-1.2 mm. According to the CO electrochemical gas sensor, the response signal of NO on the working electrode of the CO electrochemical gas sensor is reduced by optimizing the depth of the groove of the upper cover, so that the CO gas detection precision of the CO electrochemical gas sensor is improved, when the depth of the first groove is between 0.5 mm and 1.2 mm, the cross response of NO is small, and the CO concentration detection precision of the CO electrochemical gas sensor can be improved.

The present invention provides a TiN-based electrochemical NO2 gas sensor and a method for preparing the same. The electrochemical NO2 gas sensor comprises a membrane electrode assembly, a working electrode sheet, a counter electrode sheet, and a cathode sealed gas chamber; wherein the membrane electrode assembly contains TiN. The electrochemical NO2 gas sensor of the present invention utilizes TiN material with a high specific surface area and NVs sites, significantly enhancing properties such as gas diffusion, adsorption, and catalytic reactions. Compared to conventional gas sensors that enhance gas response by loading Pt onto sensitive materials, this not only significantly reduces the cost of the gas sensor but also solves the long-term stability issue caused by the shedding and aggregation of Pt nanoparticles during prolonged operation. Furthermore, the sensor exhibits excellent gas selectivity.

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.