Patents
Literature
95 results about "Quartz crystal microbalance" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
A quartz crystal microbalance (QCM) (also known as quartz microbalance (QMB), sometimes also as quartz crystal nanobalance (QCN)) measures a mass variation per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film deposition at the surface of the acoustic resonator. The QCM can be used under vacuum, in gas phase ("gas sensor", first use described by King) and more recently in liquid environments. It is useful for monitoring the rate of deposition in thin film deposition systems under vacuum. In liquid, it is highly effective at determining the affinity of molecules (proteins, in particular) to surfaces functionalized with recognition sites. Larger entities such as viruses or polymers are investigated as well. QCM has also been used to investigate interactions between biomolecules. Frequency measurements are easily made to high precision (discussed below); hence, it is easy to measure mass densities down to a level of below 1 μg/cm². In addition to measuring the frequency, the dissipation factor (equivalent to the resonance bandwidth) is often measured to help analysis. The dissipation factor is the inverse quality factor of the resonance, Q⁻¹ = w/fᵣ (see below); it quantifies the damping in the system and is related to the sample's viscoelastic properties.
Method for measuring mass sensitivity of quartz crystal microbalance with asymmetric electrode configuration
InactiveCN120142421AWeighing apparatus testing/calibrationMaterial electrochemical variablesQuartz crystal microbalanceMaterials science
The invention discloses a method for measuring the mass sensitivity of a quartz crystal microbalance with asymmetric electrode configuration, which comprises the following steps of: placing an upper electrode of the quartz crystal microbalance with asymmetric electrode configuration as a working electrode of a three-electrode electrochemical electroplating system in electroplating liquid; the asymmetric electrode configuration quartz crystal microbalance is connected into a frequency measurement system, so that a three-electrode electrochemical electroplating measurement system is constructed, and the increased mass of an electroplated film can be obtained only by measuring the total charge amount. The problem that the mass sensitivity of the asymmetric electrode configuration QCM sensor cannot be calculated by the existing Sauerbrey theory is solved, meanwhile, the measurement of the total charge belongs to electronic measurement, the measurement accuracy is far greater than the measurement accuracy of salt solution parameters, and only one electrical parameter is measured, so that the measurement accuracy of the mass sensitivity of the QCM sensor is greatly improved, and the measurement accuracy of the mass sensitivity of the asymmetric electrode configuration QCM sensor is greatly improved. The method has a wide application prospect, and can be popularized to solve the problem of experimental measurement of overtone quality sensitivity.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Quartz crystal microbalance based on cubic overtone resonance mode and sensibilization method thereof
PendingCN120369521AWeighing by absorbing componentQuartz crystal resonatorQuartz crystal microbalance
The invention relates to the technical field of sensing detection, and discloses a quartz crystal microbalance based on a triple overtone resonance mode and a sensibilization method thereof, the sensibilization method comprises the following steps: using a triple harmonic drive circuit to drive a quartz crystal resonator sensing unit, enabling the quartz crystal resonator sensing unit to generate bridge oscillation in the triple overtone resonance mode, outputting a first electric signal containing a third harmonic frequency sweeping signal; detecting the third harmonic frequency sweep signal to obtain third resonance information, and performing inversion based on the change of the third resonance information to obtain to-be-detected micro-mass change information; wherein the tertiary resonance information comprises tertiary resonance frequency and tertiary resonance bandwidth. By adopting the third harmonic drive circuit, the quartz crystal microbalance works in a third overtone resonant mode, the third overtone resonant frequency of the quartz crystal microbalance is obviously higher than the fundamental frequency resonant frequency, and the sensitivity of the quartz crystal microbalance in the third overtone resonant mode is obviously improved as the sensitivity is in direct proportion to the resonant frequency.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Comprehensive filtering device and method for DPP type extreme ultraviolet light source chippings
ActiveCN119472185Aavoid damageImprove filtering effectPhotomechanical exposure apparatusMicrolithography exposure apparatusQuartz crystal microbalanceEnergy analyser
The invention belongs to the technical field of semiconductor manufacturing equipment, and discloses a DPP type extreme ultraviolet light source chip comprehensive filtering device and a method thereof. The DPP type extreme ultraviolet light source scrap comprehensive filtering device comprises a scrap introducing part, a vacuum difference part, a gas purging part, a foil trap filtering part, an atomic hydrogen part, a delayed field ion energy analyzer part, a quartz crystal microbalance part and a control and monitoring system. According to the device disclosed by the invention, various cleaning mechanisms (vacuum difference, gas purging, foil trap filtering and atomic hydrogen reaction) are combined, and a high-precision monitoring system (an ion energy analyzer and a quartz crystal microbalance) is introduced, so that the pollution of fragments of different types and different particle sizes can be effectively filtered and relieved. Meanwhile, the real-time online monitoring system can adjust the working state of each cleaning mechanism in time according to a monitoring result, so that efficient and accurate debris cleaning is realized, the service life of a photoetching system component is prolonged, and the photoetching efficiency is improved.
Owner:SHANGHAI UNIV
Quartz crystal microbalance resonant frequency detection system, control method and terminal
PendingCN120593870AWeighing apparatus using elastically-deformable membersResonant frequencyAmplitude responseHemt circuits
The invention provides a quartz crystal microbalance resonant frequency detection system, a control method and a terminal, a direct digital frequency synthesis excitation unit is adopted to generate a frequency sweep excitation signal with a preset frequency range and stepping, and the frequency sweep excitation signal is conditioned by a signal injection and conditioning unit and then injected into a QCM sensor. And then the pure amplitude response detection unit measures and quantifies voltage response amplitudes of the QCM sensor under different excitation frequencies, and the resonant frequency intelligent determination unit determines the resonant frequency of the QCM sensor according to the voltage response amplitudes. According to the invention, a QCM self-oscillation circuit does not need to be designed and debugged, a precise phase detection assembly does not need to be configured, the circuit board layout is simpler, and components are greatly reduced. The QCM resonant frequency can be accurately measured only through efficient amplitude detection, a complex algorithm is avoided, the operational capability requirement and the software development difficulty are reduced, the QCM resonant frequency measuring device has the advantages of being simple in structure, low in cost, easy to integrate and the like, miniaturization and low-power-consumption design can be easily achieved, and the QCM resonant frequency measuring device is suitable for portable and wearable application.
Owner:SHANGHAI TECH UNIV
Method for detecting quality of aminobutyric acid extract in peanut sprouts
ActiveCN120847200AMaterial capacitanceMaterial electrochemical variablesQuartz crystal microbalanceMicrofluidics
The invention relates to the technical field of quality detection, and provides a method for detecting the quality of an aminobutyric acid extract in peanut sprouts, which comprises the following steps: performing specific recognition on aminobutyric acid by a molecular imprinting sensor, and calculating the impurity contribution by combining a preset peanut sprout interference database and partial least square regression; the interference of complex matrix impurities in the peanut bud extract can be specifically eliminated, and the problem that the specificity is insufficient when a traditional method is used for detecting a complex sample is solved; the molecularly imprinted sensor and the quartz crystal microbalance are connected in series through the microfluidic channel, and resonance frequency detection is triggered by using capacitance variation, so that a coherent process is formed from identification to quality analysis of sample detection, and the detection efficiency is improved; the corrected frequency offset, the phase angle and the temperature are input into the recurrent neural network, accurate output of the concentration of the aminobutyric acid is achieved by integrating multi-dimensional detection information, compared with a single parameter detection method, the real content of the aminobutyric acid in an extract can be reflected more comprehensively, and a reliable basis is provided for quality judgment.
Owner:NANJING KANGKEJIAN BIOTECHNOLOGY CO LTD
Quartz crystal microbalance humidity sensor, preparation method thereof and monitoring system
The invention discloses a quartz crystal microbalance humidity sensor, a preparation method thereof and a monitoring system, and belongs to the field of intelligent sensors, the sensor comprises a quartz crystal microbalance, and the surface of a crystal oscillator electrode on one side of the quartz crystal microbalance is provided with a humidity sensitive layer; the diameter of the humidity sensitive layer is 50-500nm, and the surface roughness is lt; the thickness of the copper oxide nanofibers is 20 nm. The copper oxide nanofiber surface of the humidity sensitive layer of the constructed sensor has abundant oxygen vacancies which are beneficial to adsorption of water molecules, so that the surface mass load of the quartz crystal microbalance is effectively changed, and meanwhile, the metal oxide CuO is relatively stable in air; in addition, the sensor has sensitivity of 82.5 + / -7.7 Hz / relative humidity and stability of almost no performance degradation in 15 days.
Owner:HUBEI UNIV OF TECH
quartz crystal microbalance (modular)
1. The name of the design product: quartz crystal microbalance (modular). 2. The use of the design product: for gas, liquid component analysis and micro-mass measurement, film thickness and viscoelastic structure detection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: combined state 1 perspective view. 5. Other components that need to be explained: component 1 is a sensing module, component 2 is an integrated expansion module. 6. Other information that needs to be explained: combined state 1 is composed of 10 component 1 and 1 component 2, combined state 2 is composed of 8 component 1 and 1 component 2, the design is not limited to these two combined states, according to actual needs, 1 component 2 can be combined with 1-10 arbitrary number of component 1.
Owner:CHANGZHOU INST OF TECH +1
Device and method for improving the stability and detection limit of acoustic wave sensors
ActiveUS12631600B2Analysing fluids using sonic/ultrasonic/infrasonic wavesWeighing apparatus using elastically-deformable membersReference sampleQuartz crystal microbalance
A device and method for real-time measurement using acoustic wave sensors, without the measurement being altered by environmental conditions such as temperature, humidity, flow or pressure, and without requiring the use of external gauges. The proposed method and device improve the stability and detection limit of quartz crystal microbalance (QCM) sensors. The method and device are based on the high degree of correlation between acoustic resonators integrated into a single piezoelectric substrate. The use of a reference sample to correct the instability of the baseline is not required. The method and device are intended for the industrial sector of the production of measuring devices based on quartz crystals.
Owner:ADVANCED WAVE SENSORS SL
Dual Channel Quartz Crystal Microbalance
1. The name of this design product: dual-channel quartz crystal microbalance. 2. Purpose of this design product: a balance mainly used for experimental measurement. 3. The design key point of this appearance design product lies in the shape of the product. 4. The picture or photo that best illustrates the key points of the design: main view.
Owner:CHANGZHOU AIKERUI TECH CO LTD
Pressure equalized quartz crystal microbalance assembly
PendingUS20260049964A1Analysing fluids using sonic/ultrasonic/infrasonic wavesQuartz crystal microbalanceLaboratory scale
A pressure-equalization holder is provided with a laboratory-scale reactor for measuring material deposition with a quartz crystal microbalance assembly. The pressure-equalization holder allows a process liquid from an interior of the laboratory-scale reactor to contact a liquid-facing crystal surface of a crystal of a quartz crystal microbalance assembly. The pressure-equalization holder also allows an inert fluid to contact an inert fluid-facing crystal surface of the crystal, where the inert fluid is at the same pressure as the process liquid.
Owner:CHAMPIONX LLC
Preparation method of K < + > identification response quartz crystal microbalance chip and blood potassium concentration quantitative detection method
The invention belongs to the technical field of biomedicine, and particularly relates to a preparation method of a potassium K < + > recognition response quartz crystal microbalance chip and a blood potassium concentration quantitative detection method. A 3-aminopropyltriethoxysilane (APTES) solution is used for carrying out functionalization treatment on the surface of a silicon dioxide sheet, so that a large number of amino functional groups are obtained on the surface of the silicon dioxide sheet. The preparation method comprises the following steps: taking 4-acrylamide benzene-15-crown-5 as a template, then anchoring an ATRP (Atom Transfer Radical Polymerization) initiator-bromoisobutyryl bromide on the surface of the template through a covalent bond, and carrying out grafting construction of a benzene-15-crown-5 functional polymer brush by adopting Cu0-mediated surface-initiated atom transfer radical polymerization (Cu0-SI-ATRP) by taking 4-acrylamide benzene-15-crown-5 as a polymeric monomer. The potassium selective quartz crystal microbalance based on the crown ether functionalized polymer brush is obtained.
Owner:SICHUAN UNIV
Sensitive material, gas sensitive element, preparation method, sensor and detection method
ActiveCN119241864AImprove moisture resistanceSimple preparation processAnalysing fluids using sonic/ultrasonic/infrasonic wavesWeighing by absorbing componentQuartz crystal microbalancePhysical chemistry
The invention discloses a gas sensitive element sensitive material and a preparation method thereof, a quartz crystal microbalance gas sensitive element and a preparation method thereof, a carbon dioxide sensor and a carbon dioxide detection method. The quartz crystal microbalance gas sensitive element prepared by the invention is good in moisture resistance, simple in manufacturing process, simple in structure, small in size, capable of being integrated, capable of realizing real-time monitoring of carbon dioxide, high in monitoring sensitivity and good in reproducibility.
Owner:SOUTHERN POWER GRID DIGITAL GRID RESEARCH INSTITUTE CO LTD
Spraying device capable of controlling thickness of PVD (Physical Vapor Deposition) coating
ActiveCN222648101UVacuum evaporation coatingSputtering coatingQuartz crystal microbalanceElectric machine
The utility model relates to the technical field of spraying processing, and discloses a spraying device capable of controlling the thickness of a PVD (Physical Vapor Deposition) coating, the spraying device capable of controlling the thickness of the PVD coating comprises a spraying device main body, a motor, a substrate support, a deposition source, a heat shield, a heat dissipation grid, a power interface and an equipment switch, the heat insulation cover protects the interior of the device from being influenced by high temperature generated by a deposition source, the safe and stable operation environment is ensured, the base plate support fixes a base plate needing to be sprayed, and the position can be adjusted through the motor so as to meet the requirements of base plates of different sizes and different coatings. According to the spraying device capable of controlling the thickness of the PVD coating, through integration of the quartz crystal microbalance and the efficient control system, the device can monitor the thickness and the growth rate of the coating in real time, it is ensured that the preset coating specification can be achieved in each time of deposition, and therefore the consistency and the quality of the coating are ensured.
Owner:QINGDAO DENAI NANO TECH CO LTD
Two-parameter modulation and feature fusion method of electromagnetic excitation wireless QCM-D
PendingCN120992742AAnalysing fluids using sonic/ultrasonic/infrasonic wavesUltrasonic/sonic/infrasonic wave generationQuartz crystal microbalanceAcoustic wave
The invention discloses an electromagnetic excitation wireless QCM-D (Quartz Crystal Microbalance) two-parameter modulation and multi-modal feature fusion method for high-specificity recognition of volatile organic compounds, and designs a synchronous modulation method of frequency-voltage two parameters of driving voltage for a wireless electrodeless quartz crystal microbalance WE-QCM-D system. By extracting the dissipation variable quantity of sound wave energy generated by the change of driving voltage under different excitation frequencies on the surface of a quartz crystal, the steady-state response dimension of WE-QCM-D to VOCs is improved, and the fusion of steady-state and dynamic response characteristics is carried out by combining machine learning and a neural network algorithm. High-selectivity recognition of various similar VOC gases and mixed VOCs samples is achieved, and the recognition rate reaches 95% or above.
Owner:ZHEJIANG UNIV
Electrochemical quartz crystal microbalance and electrochemical quartz crystal microbalance electrolytic tank thereof
ActiveCN222762117UWeighing apparatus using elastically-deformable membersMaterial weighingElectrochemical responseWafering
The utility model relates to an electrochemical quartz crystal microbalance and an electrochemical quartz crystal microbalance electrolytic tank, and belongs to the technical field of electrochemistry. The electrochemical quartz crystal microbalance electrolytic tank comprises a tank cover and a tank cover, a first electrode wire rod and a second electrode wire rod are embedded into one side of the tank cover, a gas pipe is detachably mounted on the tank cover and used for inputting or outputting gas into or out of a tank body, one end of the tank body is detachably connected with the tank cover, and the other end of the tank body is detachably connected with the tank cover. One end, far away from the cell cover, of the cell body is detachably connected with the base, and a quartz wafer is clamped and pressed between the base and the cell body. The air tightness of the electrolytic tank of the electrochemical quartz crystal microbalance is improved, the air pressure in the electrolytic tank is accurately monitored in real time, the impact disturbance of the air pressure fluctuation in the electrolytic tank on the working electrode during ventilation test is solved, the frequency baseline fluctuation amplitude of the working electrode is lower than 5Hz, the signal-to-noise ratio of frequency detection is greatly improved, and the test accuracy is improved. The sensitivity, the accuracy and the reproducibility of the frequency signal are improved, and effective detection on the electrochemical reaction of which the frequency signal change is only 10Hz is realized.
Owner:XIAMEN UNIV
MEMS structure delamination method and MEMS structure delamination system
PendingCN121558436APreparing sample for investigationMicrostructural devicesQuartz crystal microbalancePhysical chemistry
The invention relates to an MEMS structure delamination method and an MEMS structure delamination system, and the method comprises the steps: S1, obtaining a standard sample with a to-be-etched layer, carrying out the ion beam milling of the standard sample to remove the to-be-etched layer, recording a frequency offset [delta] f1 through employing a quartz crystal microbalance, and calculating a calibration coefficient K according to the [delta] f1; and S2, obtaining a sample to be subjected to layer removal, performing ion beam milling on the sample to be subjected to layer removal, calculating the frequency offset delta f2 of the sample to be subjected to layer removal according to the calibration coefficient K, judging a processing end point, and completing layer removal. According to the technical scheme, the mass deposition of the sputtering product in the ion beam milling process is monitored in real time through the QCM, the amount of the removed material is indirectly reflected through the frequency offset delta f1, and the machining precision is improved; a calibration coefficient K is pre-calibrated through a standard sample, and sputtering yield fluctuation in ion beam milling is compensated, so that the delamination process has good repeatability and transportability.
Owner:HUBEI JIUFENGSHAN LAB
A method for determining the single ion distribution coefficient of polyamide separation membrane
ActiveCN118641403BGeneral water supply conservationMaterial weighingOrganic solventQuartz crystal microbalance
The present invention provides a method for determining the single ion distribution coefficient of a polyamide separation membrane. The method comprises the following steps: peeling off the non-woven fabric in the washed polyamide separation membrane, and then separating the polyamide separation layer from the support layer by an organic solvent. The polyamide separation layer is attached to a gold silicon wafer, and the mass change of the polyamide separation layer under different salt ion conditions is measured by a flow module of a quartz crystal microbalance (QCM). By this method, the salt concentration and the concentration of cations and anions on the polyamide separation layer can be accurately measured, thereby quantifying the distribution coefficient of ions on the polyamide membrane. This method is simple to operate, real-time and intuitive, and can accurately quantify the distribution coefficient of ions on the polyamide membrane, which helps to gain a deep understanding of the differences in the distribution of single ions in the polyamide membrane, and provides a new strategy and method for clarifying and regulating the ion mass transfer process in the polyamide membrane.
Owner:TONGJI UNIV
A sleeve for assisting a quartz crystal microbalance in the corrosion study of first wall materials
ActiveCN115824942BWeather/light/corrosion resistanceNuclear energy generationQuartz crystal microbalanceImpurity ions
The present invention discloses a sleeve for assisting a quartz crystal microbalance in the study of first wall material corrosion, which includes a metal cylinder with different inner diameters, an insulating base, and a high-voltage power supply. After the metal cylinder with different inner diameters is embedded in the insulating base, they are installed together on the surface of the probe, and a positive bias voltage is maintained on the metal cylinder with different inner diameters by using the high-voltage power supply. The sleeve can form a flared structure in front of the quartz crystal, so that the projection of the circular coating area on the surface of the quartz crystal on the outermost closed magnetic surface of the plasma becomes a regular near-circle, and the flux of neutral particles incident on the circular coating area of the quartz crystal is reduced. At the same time, the positive bias voltage on the metal cylinder with different inner diameters can effectively prevent the incidence of impurity ions. The beneficial effects of the present invention include simplifying and accurately calculating the average solid angle of the circular coating area of the quartz crystal with respect to its projection area on the outermost closed magnetic surface of the plasma, extending the service life of the quartz crystal microbalance, and eliminating the interference of impurity deposition.
Owner:HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
Digital microfluidic system containing quartz crystal microbalance sensor
The utility model discloses a digital micro-fluidic system containing a quartz crystal microbalance sensor. The digital micro-fluidic system comprises an integrated system and a main body, the integrated system comprises a constant temperature system, a microfluidic system, a quartz crystal microbalance system, a control system and a data processing system, automatic control of subsystems of the instrument is realized by using an embedded system, and integrated control of the subsystems is completed by combining system programming. A main body is designed to surround a micro-fluid channel of a micro-fluidic chip and a layout of a quartz crystal sensor, the QCM sensor is connected with the micro-fluid channel of the micro-fluidic chip, it is ensured that fluid can be in contact with the sensor through the channel, fluid flowing is accurately controlled through a peristaltic pump and the micro-fluid channel, and a sample pool and a waste liquid pool are arranged; the container is used for storing samples and collecting waste liquid; mechanical support design is carried out on an instrument support structure, and internal structure protection design is carried out on each control and interface unit.
Owner:CHANGZHOU AIKERUI TECH CO LTD
A method for detecting freshness of salmon fish meat by using a QCM gas sensor array combined with a physicochemical method
ActiveCN116148344BAnalysing fluids using sonic/ultrasonic/infrasonic wavesTesting foodBiotechnologyPrincipal component analysis
Salmon meat is prone to spoilage during transportation and storage due to its rich protein and fatty acid content. During the spoilage process, the released volatile organic compounds (VOCs) can vary greatly, mainly including trimethylamine (TMA), dimethylamine (DMA), formaldehyde (HCHO), and ammonia (NH3). In this study, an array of quartz crystal microbalance (QCM) gas sensors was established, which was modified with graphene oxide (GO), Mxenes (Ti3C2T X ), hydroxylated multi-walled carbon nanotubes (MWCNTs), and graphdiyne oxide (GO P ), respectively, to detect TMA, DMA, HCHO, and NH3 in salmon meat, respectively. The results showed that the four kinds of sensor materials modified QCM sensors had good sensitivity, selectivity and repeatability for the corresponding target gas. Finally, the freshness of salmon meat was detected using the sensor array. The sensor response data was visualized by principal component analysis (PCA), and the first two principal components (PCs) explained 98.8% of the total contribution variance. A further discriminant model was established using quadratic support vector machine (QSVM), and the classification result was 100%. To further describe, the detection results were compared with the total volatile base nitrogen (TVB-N) content to judge the freshness of salmon meat.
Owner:SHANDONG UNIV OF TECH
Emulsified oil adsorption membrane pollution testing method and device
The invention relates to the technical field of membrane cleaning, and provides a membrane pollution test method for emulsified oil adsorption and a device thereof in order to solve the problem that a test method for simulating adsorption pollution conditions of emulsified oil drops with different particle sizes on the surface of a membrane lacks in the prior art, and the test method comprises the following steps: assembling a membrane to be tested on the surface of a clean gold electrode, and then putting the membrane into a sample pool; adding the artificial emulsion into a sample pool, and detecting the surface condition of a gold electrode through a quartz crystal microbalance to analyze the membrane pollution condition; a cleaning agent to be detected is added into the sample pool, and the surface condition of the gold electrode is detected through the quartz crystal microbalance to analyze the cleaning effect. The particle size of emulsified oil drops in the artificial emulsion can be regulated and controlled, so that the artificial emulsion can be used for simulating different oily wastewater, the change conditions of adhesion, aggregation and the like of oil molecules on the surface of the membrane can be observed, and the adsorption behavior and the cleaned effect of the oil drops on the filter membrane under different particle sizes can be analyzed; the development of a filter membrane with strong anti-pollution capacity and a cleaning agent with a good cleaning effect is facilitated.
Owner:ZHEJIANG UNIV OF WATER RESOURCES & ELECTRIC POWER
A sealed quartz crystal microbalance for lithium-ion battery electrode material testing
ActiveCN115561642BResistance/reactance/impedenceElectrical testingElectrical batteryQuartz crystal microbalance
The invention discloses a closed quartz crystal microbalance for detecting electrode materials of lithium ion batteries, wherein a PCB board is fixed in a receiving groove, a USB interface is fixed at the bottom of the PCB board, a chip placement groove is provided at the top of the detection pool, a QCM chip is provided in the chip placement groove, a first retractable copper column is fixed in a first jack, and one end of the first retractable copper column is fixedly connected to the PCB board, and the other end of the first retractable copper column abuts the QCM chip; a reaction groove is provided in the center of the fixed pool, and a lithium belt is provided in the reaction groove; a card block is fixed at the bottom of the end cover, and the card block is plugged and matched with the reaction groove, a circuit lead-out groove is also provided at the top of the end cover, a second retractable copper column is fixed in the second jack, one end of the second retractable copper column abuts the lithium belt, and the other end of the second retractable copper column extends into the circuit lead-out groove. The device has good airtightness, can prevent the electrode material from being oxidized during the detection process, so that the device can be measured and analyzed outside the glove box, has low environmental requirements, and is easy to carry.
Owner:GUANGZHOU UNIVERSITY
A new type of quartz crystal microbalance with concave ring structure
ActiveCN115112208BRaise the resonant frequencySmall repeatability errorWeighing apparatus using elastically-deformable membersWaferingMetallic electrode
The present invention discloses a novel quartz crystal microbalance with a concave platform annular structure, comprising a quartz wafer with a concave platform, metal electrodes attached to the upper and lower surfaces, the lower surface being a circular electrode, and the upper surface being an annular electrode; the lower surface of the quartz wafer is flat, and an anti-table is etched in the central area of the upper surface, the radius of the anti-table is greater than the radius area of the circular electrode, and the surrounding area remains unchanged. The present invention improves the structure of the annular quartz crystal microbalance, and solves the problem of the absolute mass sensitivity decrease of the annular electrode QCM when the mass sensitivity is homogenized by etching a groove. This special design not only reduces the repeatability error, but also improves the detection accuracy.
Owner:NANJING UNIV OF SCI & TECH
Systems, devices, and methods for electrochemical water analysis
ActiveUS12282001B2Analysing fluids using sonic/ultrasonic/infrasonic wavesTesting waterAnalyteQuartz crystal microbalance
Methods and apparatus for electrochemical analysis of water include acid cleaning a quartz crystal microbalance (QCM), stabilizing a QCM in analyte solution, and analyzing the solution by chronoamperometry and measuring a frequency shift of the QCM. The method may further include cleaning the QCM in an acid solution prior to stabilizing the QCM in analyte solution. The apparatus may provide at least semi-automated electrochemical analysis of water including determining a concentration of an analyte in a water sample, and communicating the concentration of the analyte over a network. The analyte may be manganese.
Owner:QUEENS UNIV
Equipment and method for monitoring air environment pollution of factory harmed by occupational diseases
The invention discloses equipment and a method for monitoring air environment pollution of factories damaged by occupational diseases, belongs to the technical field of air environment monitoring, and solves the problems that the toxicity of composite pollutants formed by quenching oil mist and metal dust in heat treatment and fine grinding workshops of bearing manufacturers is multiplied, sampling distortion is caused by oil mist interference detection and workshop pollutant retention areas, and the detection accuracy is low. And finally, the detection report reaches the standard falsely. Comprising a sensor array module and a data processing module, and the sensor array module comprises a quartz crystal microbalance array module, a multi-wavelength optical sensor array module, a broadband impedance sensor array module and a surface acoustic wave sensor array module. According to the invention, through synchronous acquisition of multi-modal sensor data, real-time analysis and processing, quantification of pollutant carrier effect, fusion of multi-source information, accurate identification of pollutant components, assessment of health risk level and automatic generation of early warning signals, comprehensive and accurate monitoring and risk early warning of composite pollutants in a factory environment are realized.
Owner:ZHEJIANG XINGDA SAFETY TECH CO LTD
Method for measuring service life of boron film on first wall of Tokamak device
PendingCN121632836ANuclear energy generationMaterial weighingQuartz crystal microbalancePhysical chemistry
The invention discloses a method for measuring the service life of a first wall boron film of a Tokamak device, and belongs to the technical field of high-temperature plasma diagnos.The method comprises the steps that in the operation stage of a Tokamak plasma experiment, the mass change of a material is monitored in real time through a quartz crystal microbalance system located in a magnetic shadow area; based on monitoring data of the quartz crystal microbalance system, an evolution curve of accumulated mass change along with accumulated discharge time is drawn; performing local fitting and slope inspection on the slope of the evolution curve of the cumulative mass change along with the cumulative discharge time, and when the local fitting slope is remarkably changed, extracting plasma parameters under corresponding discharge conditions and confirming that the plasma parameters are in a stable state; and judging the end-of-life point of the first wall boron film based on the slope characteristic of the evolution curve of the cumulative mass change along with the cumulative discharge time. According to the invention, in-situ, real-time and accurate life measurement can be realized in the plasma discharge process.
Owner:HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES
Dual-channel quartz crystal microbalance
1. The name of the design product: Dual-channel quartz crystal microbalance. 2. The use of the design product: Used for the component analysis of gases and liquids, the measurement of micro mass, and the detection of film thickness and viscoelastic structure. 3. The design key points of the design product: Lies in the shape. 4. The picture or photo that best shows the design key points: Perspective view.
Owner:CHANGZHOU INST OF TECH
Quartz crystal microbalance sensor and refrigeration equipment
PendingCN119469346AWeighing apparatus using elastically-deformable membersWeighing apparatus detailsQuartz crystal microbalancePhysical chemistry
The invention discloses a quartz crystal microbalance sensor and refrigeration equipment, the quartz crystal microbalance sensor comprises a shell and a sensor body arranged in the shell, the sensor body comprises a quartz layer, the quartz crystal microbalance sensor further comprises an elastic layer, the elastic layer is arranged between the quartz layer and the shell, and the elastic layer is arranged in the shell. The elastic layer is made of a porous breathable material. For low-frequency vibration in the refrigeration equipment environment, the porous breathable elastic layer is arranged in the quartz crystal microbalance sensor, the low-frequency vibration in the refrigeration equipment is absorbed through the elastic layer, and the influence of the vibration on the sensor body is weakened; therefore, the gas can be obtained by the sensor body through the elastic layer, so that the quartz crystal microbalance sensor can more accurately test the gas on the basis of avoiding vibration influence, and application of the quartz crystal microbalance sensor in refrigeration equipment is facilitated.
Owner:QINDAO HAIER REFRIGERATOR CO LTD +2
Atmospheric corrosion monitoring device based on quartz crystal microbalance
ActiveCN223637343UWeather/light/corrosion resistanceMaterial weighingElectrical batteryHemt circuits
The utility model relates to an atmospheric corrosion monitoring device based on a quartz crystal microbalance, which is characterized in that a measuring circuit is connected with an MCU (Microprogrammed Control Unit), collects an oscillation signal generated by a quartz crystal wafer sensor, identifies the frequency of the oscillation signal, and transmits the frequency of the oscillation signal to the MCU; and the MCU is used for calculating the oxidation weight gain rate and the corrosion rate of the metal film. The battery is connected with and supplies power to the measuring circuit; the charging circuit is connected with the battery and provided with a charging interface. The atmospheric corrosion monitoring device based on the quartz crystal microbalance can reach nanogram resolution, so that the mass gain of metal surface corrosion products in the atmospheric environment can be monitored on line in situ, and the sensitivity of monitoring the overall corrosion can meet the requirements that the magnitude order of 10-9g is difficult to realize by other types of sensors and the corrosion resolution is less than or equal to 10nm; and the monitoring precision of metal corrosion is greatly improved.
Owner:WUHAN CORRTEST INSTR
Atmospheric environment pollution deposition quality detection sensor and preparation method thereof
PendingCN119334440AWeighing apparatus using elastically-deformable membersQuartz crystal microbalanceEnvironmental engineering
The invention discloses an atmospheric environment pollution deposition quality detection sensor and a preparation method thereof, the atmospheric environment pollution deposition quality detection sensor comprises a quartz crystal microbalance, the upper surface of the quartz crystal microbalance is provided with a detection electrode, and the lower surface of the quartz crystal microbalance is provided with an excitation electrode. The excitation electrode is provided with a conductive wire which is connected with the PCB, and the PCB is provided with an elastic needle which is connected with detection equipment so as to carry out signal detection. According to the atmospheric environment dirt deposition quality detection sensor provided by the invention, the quality of dirt adsorbed on the upper surface of the quartz crystal microbalance is directly detected by detecting the change of the resonant frequency of the quartz crystal microbalance, so that the frequency and accuracy of data updating are improved; the sensor is reasonable in structural design, can accurately reflect the quality of dirt, and provides powerful guarantee for safe operation of a detection system.
Owner:SHANDONG ZHONGSHI YITONG GRP CO LTD