25 results about "Potentiometric sensor" patented technology

The invention discloses an intelligent control method for ceric ammonium nitrate precipitation process continuous production and application, and belongs to the field of intelligent production control, the intelligent control method comprises a hydrogen peroxide section intelligent control method and an ammonia water section intelligent control method, and the method comprises the steps that S1, a server receives V2; s2, a second potential sensor sends V2 ''; the server makes X2 = V2 '-V2, if the absolute value of X2 is within the threshold value, production continues, and if the absolute value of X2 is outside the threshold value, an alarm instruction is output; m1, the server receives the V3; and M2, the third potential sensor sends V3 ''to the server, the server makes X3 = V3''-V3, if the absolute value of X3 is within the threshold value, production continues, and if the absolute value of X3 is outside the threshold value, an alarm instruction is output. The reaction process is intelligently controlled, the process is adjusted in time, unqualified products are prevented from entering the next procedure, and stable quality of the whole procedure is guaranteed.

A force sensor includes an array substrate having a first surface provided with a plurality of array electrodes, a node provided on the array substrate and supplied with constant potential, a sensor layer facing the first surface, and a plurality of bypass wires provided on the array substrate and coupling the respective array electrodes to the node. The resistance value of each bypass wire is larger than the resistance value of the sensor layer.

The invention relates to the technical field of fuel cell membrane electrode voltage distribution testing, in particular to a fuel cell membrane electrode voltage distribution testing method and system, and the method comprises the steps: arranging a potential sensor array, and synchronously collecting an original voltage vector through the potential sensor array in the loading operation process of a fuel cell; a reference electrode is arranged in the non-reaction area, a stable reference signal is applied to the reference electrode, and a feedback signal of the reference electrode is collected after preset stable time is delayed; carrying out difference calculation on the feedback signal and the stable reference signal to obtain a system measurement drift distance; and performing joint calibration on the original voltage vector according to the system measurement drift amount and the spatial continuity constraint of the membrane electrode voltage distribution to obtain the voltage distribution vector of the fuel cell membrane electrode. And the authenticity and reliability of the voltage distribution data in the long-period test process of the fuel cell are ensured by continuously compensating the drift of the measurement precision.

The invention discloses a nanosecond square wave transient impedance tower grounding defect on-line detection method and system. The method comprises the steps that distributed potential sensors are arranged on the periphery of a tower grounding body, and multi-channel synchronous acquisition is established; injecting a rectangular pulse signal into the grounding down lead, and superposing a damping sine component subjected to frequency response compensation; synchronously acquiring voltage and current responses, calculating a transient impedance differential ratio, a total harmonic distortion rate and a wavelet packet energy entropy, and judging a defect type according to a preset threshold value and a weighted fusion criterion; constructing and solving a ground potential field model, and positioning a defect position; the system is composed of a nanosecond square wave generator, a distributed potential sensor, a data acquisition and synchronization module, a signal analysis module and a ground potential tomography module, and sensor signals are subjected to differential transmission through a twisted-pair shielding cable to suppress interference. According to the invention, rapid and accurate identification and positioning of the grounding defect of the tower under the non-power-off condition are realized, the identification rate is high, and the positioning precision is excellent.

An aerosol generating device includes an aerosol generator configured to generate aerosols, and a potentiometric sensor configured to generate a signal based on an electric potential difference that changes according e to changes in components of aerosols generated by the aerosol generator.

To provide an in vitro method for diagnosis, prognosis, risk assessment, monitoring, therapy guidance and / or therapy control of an infectious disease.SOLUTION: The invention relates to an in vitro method, comprising (a) providing a sample of a subject exhibiting clinical symptoms of and / or suspected of having an infection, (b) determining a level of D-lactate in said sample, (c) wherein the level of D-lactate is indicative of the presence of an infectious disease, characterized in that (d) the level of D-lactate in said sample is determined by means of an electrochemical sensing system (biosensor). In embodiments, the electrochemical sensing system comprises a potentiometric or an amperometric sensor. The electrochemical system comprises a D-lactate binding molecule, that is preferably immobilized on a detection (working) electrode. In embodiments, the detection electrode with the immobilized D-lactate binding molecule is comprised by a (disposable) test strip for insertion into a portable reader.SELECTED DRAWING: None

To provide an image formation apparatus capable of accurately estimating the surface potential of a photosensitive body without using a surface potential sensor, and also capable of suppressing generation of a fog toner.SOLUTION: The image formation apparatus includes: an image carrier; a charging device; a developing device; a developing voltage power supply; a charging voltage power supply; a current detection unit; and a control unit, the control unit being configured to execute a surface potential estimation process for estimating the surface potential of the image carrier, the control unit setting a developing current, which is obtained by applying a direct-current voltage Vdc to a developer carrier of the developing device so that a developing potential difference ΔV, which is the difference between the surface potential of the image carrier and the direct-current voltage Vdc, becomes a predetermined value while no charging voltage is applied to a charging member, as a reference current and executing the surface potential estimation process for estimating the surface potential of the image carrier as the sum of the direct-current voltage and the developing potential difference ΔV when the developing current detected by the current detection unit becomes equal to the reference current in a state where the charging voltage is applied to the charging member to charge the image carrier to a predetermined surface potential.SELECTED DRAWING: Figure 4

A method for manufacturing a sensor element for a potentiometric sensor includes: forming a glass layer made of an electrically insulating glass on a surface of a base body, in particular a base body made from an electrically insulating material; arranging a substrate made of copper or a copper-based alloy having a mass fraction of at least 60% copper on the glass layer; covering the substrate arranged on the glass layer with a glass body, for example a glass plate, made of an ion-selective, in particular pH-selective, glass; and subsequently controlling the temperature of the arrangement of the base body, substrate and glass body thus formed in such a way that the substrate is integrally bonded to the glass body made of the ion-selective glass and the glass layer on the surface of the base body.

The invention provides a membrane for a solid-state reference electrode, the membrane formed from a cross-linked zwitterionic polymeric matrix loaded with an inorganic salt, the inorganic salt being dispersed in the cross-linked zwitterionic polymer matrix. The invention also provides a solid-state reference electrode comprising a reference electrode with the membrane disposed on a surface of the reference electrode and a method of producing thereof. In addition, the invention provides a potentiometric sensor comprising the solid-state reference electrode and an ion-selective electrode.

The present disclosure relates to a sensor element for a potentiometric sensor, including a substrate and an ion-selective enamel layer arranged on the substrate. The substrate has at least one region which is electroconductively connected to the ion-selective enamel layer. The region of the substrate, which is electroconductively connected to the sensor layer, is made of a copper-based alloy having a mass fraction of at least 60% of copper.

A portable outdoor electric leakage detector provided by the present invention comprises a support, the support comprises a disc base and a vertical rod, the vertical rod is arranged at the center of the disc base, the vertical rod is of a hollow structure, four potential sensors are respectively arranged on supporting legs, in contact with the ground, of the disc base, and the adjacent potential sensors are spaced by 90 degrees. The main controller is connected with the four potential sensors through the hollow structure of the vertical rod and used for collecting detection signals of the four potential sensors and calculating the position of an electric leakage point according to the potential difference between the two pairs of centrosymmetric potential sensors. The equipotential line of the detection area is calculated through the two pairs of centrosymmetric potential sensors, the position of the electric leakage point is determined according to the equipotential line, automatic detection of the electric leakage point is achieved, the detection accuracy is high, and the electric shock risk is small.

The application discloses an intelligent control method for continuous production of a cerium ammonium nitrate precipitation process and application, belongs to the field of intelligent production control, and comprises a hydrogen peroxide section intelligent control method and an ammonia water section intelligent control method, and comprises the following steps: S1, a server receives V2; S2, a second potential sensor sends V2"; the server makes X2=V2"-V2, if the absolute value of X2 is within a threshold value, production continues, if the absolute value of X2 is outside the threshold value, an alarm instruction is output; M1, the server receives V3; M2, a third potential sensor sends V3" to the server, the server makes X3=V3"-V3, if the absolute value of X3 is within a threshold value, production continues, if the absolute value of X3 is outside the threshold value, an alarm instruction is output. The application intelligently controls a reaction process, adjusts a process in a timely manner, avoids unqualified products from entering a next process, and guarantees the quality stability of the whole process.

The present invention relates to ion selective membranes and the preparation thereof, such as magnesium ion selective membranes and the preparation thereof. In particular, the invention describes improved polymer blends for use in ion selective membranes. The invention furthermore relates to electrodes and potentiometric sensors comprising such membranes and the use thereof for determining ion concentrations in samples.

The invention relates to a design method of a field grinding type surface potential sensor, in particular to a design method of a field grinding type surface potential sensor working in high-density space charges. The invention aims to solve the problem that the electrostatic control performance is influenced by deviation of the detected surface potential of a traditional field grinding type surface potential sensor in a high-density space charge environment. The method comprises the following steps: firstly, designing a differential probe structure with a reverse-phase rotor and a double-sided induction electrode, and introducing reverse-phase current on the upper surface to realize self-compensation of interference; a mathematical model of the differential sensor is established, and interference and compensation current components are quantified; on the basis, a closed-loop control system model containing interference is established and analyzed, the stable condition of the system is derived, a design formula for compensating the cavity distance is deduced according to the stable condition, and it is ensured that the system works stably in the interference environment, and the surface potential is converged to zero. The invention belongs to the technical field of industrial electrostatic control.

The present application relates to the technical field of fuel cell membrane electrode voltage distribution test, in particular to a kind of fuel cell membrane electrode voltage distribution test method and system, the method is through the layout potential sensor array, in the loading operation process of fuel cell, through potential sensor array synchronous acquisition original voltage vector;Reference electrode is laid in non-reaction zone, stable reference signal is applied to reference electrode, and feedback signal of reference electrode is collected after delay presetting stabilization time;Feedback signal and stable reference signal are obtained system measurement drift amount by difference calculation;According to the spatial continuity constraint of system measurement drift amount and membrane electrode voltage distribution, original voltage vector is jointly calibrated, and the voltage distribution vector of fuel cell membrane electrode is obtained.By continuously compensating the drift of measurement accuracy, the authenticity and reliability of the voltage distribution data during the long-period test of the fuel cell are ensured.

Disclosed is a device (100) for taking electrochemical measurements with a view to measuring physico-chemical quantities and / or concentrations of molecules in a solution (300), the device comprising: - a set (13) of sensors arranged on a carrier (11), the set comprising at least one amperometric sensor (134, 134a, 134b) and at least one OCP sensor (131, 131a, 131b, 132, 132a, 132b) for taking measurements of open-circuit potential, the amperometric sensor comprising a working electrode (1341, 1341a, 1341b), a reference electrode (1342, 1342a, 1342b) and a counter-electrode (1343, 1343a, 1343b), the OCP sensor comprising a reference electrode (1312, 1312a, 1312b, 1322, 1322a, 1322b) and a working electrode (1311, 1311a, 1311b, 1321, 1321a, 1321b); - an electronic device (10) for acquiring and processing measurement signals delivered by the sensors, the electronic device further comprising at least one circuit (103) for controlling the bias of the electrodes of the sensors.

An AUV includes: a position detector that detects its position relative to an underwater structure; a propulsor; and control circuitry configured to control the propulsor and grasp a position of the AUV; an underwater potential sensor that three-dimensionally measures a potential gradient in water; and a metal potential sensor that inspects an electric field producing body that is a part of the underwater structure or a sacrificial anode. The control circuitry specifies a position of the body by mapping an underwater electric field from the potential gradient measured by the sensor in accordance with movement of the AUV. The control circuitry controls the propulsor such that the AUV moves to and stops at an inspection position that is a position at which the metal potential sensor is opposed to the body. In this state, the control circuitry makes the metal potential sensor inspect the body.

An embodiment of the present invention provides a method for preparing a potential sensor and a potential sensor. The method comprises: uniformly dispersing an active material and a conductive carbon material in a preparation solvent according to a preset ratio; then removing the preparation solvent to allow the conductive carbon material to self-assemble into a conductive film, with the active material uniformly embedded in the inner structure of the conductive film, to obtain a reference electrode material; and cutting the reference electrode material and connecting the cut reference electrode material to a conductive tab to obtain a potential sensor. The potential sensor utilizes the conductive carbon material to self-assemble into a conductive film, and uniformly embeds the active material within the conductive film, thereby reducing side reactions between the active material and the electrolyte and preventing the active material from falling off. The sensor has a long service life and can achieve long-term monitoring and testing of the battery's negative electrode potential. Furthermore, the sensor eliminates the need for a separate substrate material and adhesive, reducing the impact on the battery itself.

The invention discloses an all-solid-state copper ion selective electrode based on a polydimethylsiloxane and amorphous hollow ZnSnO3 composite material as a solid transfer layer, and a preparation method and application thereof, and belongs to the technical field of ion selective electrodes. The solid-state transfer layer covers the end face of the columnar conductive substrate, the copper ion selective membrane covers the solid-state transfer layer, and the solid-state transfer layer is made of polydimethylsiloxane and amorphous hollow ZnSnO3 composite materials. According to the invention, the polydimethylsiloxane for enhancing the hydrophobicity of the material and the amorphous hollow ZnSnO3 composite material with large specific surface area are combined to obtain the composite material for reducing the interface resistance and the water layer effect. The electrode can be applied to a potentiometric sensor for detecting Cu < 2 + >, has excellent detection limit, sensitivity and long-term stability as well as excellent hydrophobicity and anti-interference capability, and can still keep optimal detection performance under complex conditions.

An example apparatus is disclosed. The apparatus includes a reference electrode and an ion selective electrode (ISE). The reference electrode includes a reference electrode substrate, a reference electrode conductor formed via a printable composition on the reference electrode substrate, and a reference membrane formed on the carbon nanotube layer. The ISE includes an ISE substrate, a ISE conductor printed on the substrate via a printable composition on the ISE substrate, and an ion-selective membrane printed on the conductor via a printable membrane solution.

The utility model belongs to solution detection technical field, concretely relates to a kind of micro-arc oxidation electrolyte concentration real-time detection and regulation device, including adjustment module, circulation channel, detection module and control module.Adjustment module realizes the dynamic adjustment of electrolyte concentration by mother liquor storage tank, dilution water tank and Y-type mixer;Circulation channel is equipped with detection module, including conductivity sensor and temperature sensor in the first detection flow-through groove, heat exchange cooling device and the PH sensor, potential sensor and resistivity sensor in the second detection flow-through groove;Control module adjusts electromagnetic valve opening degree in real time according to sensor data, triggers liquid supplementing or dilution operation.The device is also equipped with environmental protection circulation system, and the recovery and recycling of electrolyte are realized by waste liquid collection tank, multistage filtration module, ion exchange column and electrochemical regeneration device.The device solves the problem of traditional equipment detection response delay and adjustment lag, ensures the continuity and stability of micro-arc oxidation process.

Described herein are sensors for detecting an analyte of interest in a sample. These sensors can comprise a potentiometric sensor comprising a surface functionalized with a pH-sensitive aptamer switch that specifically binds the analyte of interest, wherein the pH-sensitive aptamer switch is operatively coupled to the potentiometric sensor such that binding of the analyte of interest by the pH-sensitive aptamer switch induces a measurable change in the potentiometric sensor; and an auxiliary electrode in proximity to the surface, wherein the electrode is configured to alter a pH of a microenvironment in contact with the surface, thereby reversibly shuttling the pH-sensitive aptamer switch between a first state wherein it specifically binds the analyte of interest and a second state wherein it does not specifically bind the analyte of interest.

This application discloses a charge simulation measurement device and method for a through-wall bushing. The charge simulation measurement device for the through-wall bushing includes: an insulating core sample for electrical connection to a power source; an experimental chamber for housing the insulating core sample; a grounding component electrically connected to and grounded to the insulating core sample, the grounding component dividing the space inside the experimental chamber into a first region and a second region distributed along the axial direction; a temperature field construction component, including a heating component and a sensor group, the heating component extending along the axial direction of the insulating core sample and capable of independent temperature control in each region, for forming a preset temperature gradient on the insulating core sample; and a charge measurement component, including a potential sensor and a driving mechanism, the driving mechanism for driving the potential sensor to generate relative motion along the axial direction and relative rotation around the axial direction with the insulating core sample, the potential sensor being capable of performing potential scanning measurements at different positions of the insulating core sample in the first region and the second region.

The invention belongs to the field of drug analysis and detection, and particularly relates to application of a potential sensor based on a polyaniline modified miniature two-electrode system to methylmalonic acid detection. In the potential sensor based on the polyaniline-modified miniature two-electrode system, polyaniline-loaded carbon fiber serves as a working electrode, an open-circuit potentiometric method is adopted for detecting methylmalonic acid, the sensor is particularly suitable for detecting methylmalonic acid in body fluid or excrement, pretreatment is not needed, detection is instant, rapid and accurate, the anti-interference capability is high, and the sensitivity is high. And a novel efficient and reliable analysis method is provided for detection of methylmalonic acid.

A paper-based analytical device for potentiometric assay of Arylsulfatase A (ARSA) activity levels. The analytical device comprises a filter paper substrate supporting a potentiometric cell, a reference electrode, and an ion-selective electrode. The electrodes are constructed using an ink comprising carbon nanotubes and reduced graphene oxide (r-GO). The analytical device also includes a solid-contact potentiometric sensor for ARSA integrated with the electrodes and a polymeric membrane associated with the ion-selective electrode. The analytical device is capable of providing results from actual serum and whole blood samples. A method for monitoring blood ARSA levels and a method for fabricating the analytical device are also disclosed.